Our products at a glance

Always the right solution for your application

Passive Components

Resistors

Series/Type	Manufacturer	Product Group	Category	Main Category	Rated Voltage[Vdc]	Rated Voltage[Vac]	Operation Temperature[°C]	Resistance [mΩ]	Resistance [kΩ]	Rated Power [W]	Dimensions L [mm]	Dimensions W/D [mm]	Product Feature	Product Status
SRM	Firstohm	Melf	Resistors	Passive Components	300 to 800	300 to 800	-55 to 150	100 to 10000000000	0.0001 to 10000	0.25 to 3	1.35 to 4	3.52 to 10.5	• AEC-Q200 Compliant • Anti-suluration test qaulified • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • MELF packaging yet capable of high power handling • Special conductive film enhances anti-surge capability • Absorbs harmful surge which damages precious devices or components • Approved to the safety requirement of EN IEC 62368-1:2018, Anhang/Annex G.10 (includes former requirement of EN IEC 60065(VDE 0860), 14.2a) except SRM204 type) • Products meet RoHS requirements and do not contain substances of very high concern indentified by European Chemicals Agency	In Production	Request
SWM	Firstohm	Melf	Resistors	Passive Components			-55 to 200	1000 to 1200000	0.001 to 1.2	1 to 4	3 to 5.1	8.5 to 14.6	• AEC-Q200 Compliant • SMD enabled structure • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1412 • Enhanced weld spot is reliable against surge • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency • SWM series is applied in high surge applications such as high rush current protection for power capacitor, motor start-up protection, car & motorcycle engine ignition, etc. to absorb harmful surge, so to prevent hazard of circuit damage caused by surge energy	In Production	Request
EFP	Firstohm	Melf	Resistors	Passive Components	300 to 1000	300 to 1000	-55 to 155	0 to 10000000000	0 to 10000	0.5 to 5	1.35 to 4.6	3.52 to 14.6	• High power handling • Superior reliability and stability • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • SMD enabled structure with excellent solderability • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
HVM	Firstohm	Melf	Resistors	Passive Components	300 to 1000	300 to 1000	-55 to 155	51000000 to 68000000000	51 to 68000	0.17 to 3	1.35 to 5.1	3.52 to 14.6	• SMD enabled structure • VDE0806 Compliance • Handles much higher working voltage than general purpose resistors • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Pure tin-plated termination for excellent solderability • Anti-surge features available • Products meet RoHS reqiurements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MMP	Firstohm	Melf	Resistors	Passive Components	300 to 500	300 to 500	-55 to 125	10000 to 1000000000	0.01 to 1000	0.17 to 1	1.35 to 2.2	3.52 to 5.9	• SMD enabled structure • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MMP(V)	Firstohm	Melf	Resistors	Passive Components	300 to 500	300 to 500	-55 to 155	10000 to 1000000000	0.01 to 1000	0.25 to 0.5	1.35 to 2.2	3.52 to 5.9	• AEC-Q200 Compliant • Excellent solderability termination • Anti-sulfuration test qualified • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MM	Firstohm	Melf	Resistors	Passive Components	200 to 500	200 to 500	-55 to 125	0 to 10000000000	0 to 10000	0.17 to 0.5	1.1 to 2.2	2.1 to 5.9	• SMD enabled structure • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MM(V)	Firstohm	Melf	Resistors	Passive Components	300 to 500	300 to 500	-55 to 155	470 to 10000000000	0.00047 to 10000	0.25 to 0.5	1.35 to 2.2	3.52 to 5.9	• AEC-Q200 Compliant • Excellent solderability termination • Anti-sulfuration test qualified • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
SM	Firstohm	Melf	Resistors	Passive Components	200 to 500	200 to 500	-55 to 125	510 to 10000000000	0.00051 to 10000	0.25 to 0.5	1.35 to 2.2	3.52 to 5.9	• Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • SMD enabled structure with excellent solderability • Excellent solderability termination • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
SFP	Firstohm	Melf	Resistors	Passive Components	200 to 1000	200 to 1000	-55 to 155	0 to 10000000000	0 to 10000	0.4 to 3	1.35 to 4	3.52 to 10.5	• Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Low temperature coefficient and tolerances • Excellent stability • Superior power handling • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
SFP(V)	Firstohm	Melf	Resistors	Passive Components	200 to 1000	200 to 1000	-55 to 155	220 to 1000000000	0.00022 to 1000	0.4 to 3	1.35 to 4	3.52 to 10.5	• AEC-Q200 Compliant • Low temperature coefficient and tolerances • Excellent stability • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Superior power handling • Anti-sulfuration test qualified • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
ZMM	Firstohm	Melf	Resistors	Passive Components	150 to 500	150 to 500	-55 to 200	20	0.0002		1.1 to 2.2	2.1 to 5.9	• Stable metal film construction • Very low resistance ≤0,02Ω • SMD enabled structure • Excellent in heat dissipation than chip resistor • Excellent solderability termination • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
SSR	Firstohm	Axial lead type	Resistors	Passive Components	600 to 800	600 to 800	-55 to 150	10000 to 240000000	0.01 to 240	0.25 to 3	2.6 to 5.5	6.5 to 15.5	• Designed to replace carbon or ceramic composition resistor, SSR series is applied in high-surge applications such as fuel ignition systems, power charging/discharging circuits, TV sets, etc. to absorb harmful surge energy, so to prevent hazard or fire and circuit damage caused by surge energy with a flame-proof coating • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
SWA	Firstohm	Axial lead type	Resistors	Passive Components			-55 to 200	100 to 1200000	0.0001 to 1.2	1 to 6	4 to 8	11 to 24	• Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1412 • Enhanced weld spot is reliable against surge • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency • SWA series is applied in high surge applications such as high rush current protection for power capacitor, motor start-up protection, car & motorcycle engine ignition, etc. to absorb harmful surge, so to prevent hazard of circuit damage caused by surge energy	In Production	Request
MM(P)	Firstohm	Melf	Resistors	Passive Components	200 to 500	200 to 500	-55 to 125	100 to 330000000	0.0001 to 330	0.17 to 0.5	1.35 to 2.2	3.52 to 5.9	• SMD enabled structure • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MSD	Firstohm	Axial lead type	Resistors	Passive Components	250 to 1000	250 to 1000	-55 to 200	100 to 1000000000	0.0001 to 1000	0.25 to 6	2.6 to 8	6.5 to 24	• Special composite film on high grade ceramic substrate • Flameproof multi-layer coating equivalent to UL 94 V-0 • Excellent anti-surge capability • Absorbs pulse from city power line, direct crossing or inductive coupling • Protects electric equipment or parts from accidental shock • Low-cost alternative to wire-wound resistors • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Ageny	In Production	Request
PPR	Firstohm	Axial lead type	Resistors	Passive Components	600 to 700	600 to 700	-55 to 155	10000 to 4700000000	0.01 to 4700	0.25 to 2	2.6 to 5	6.5 to 13.5	• Application: high-frequency, sharp-impulse circuits • To protect active components in missile detonators, triac switching circuits, etc. • Offer every better aspect of performance than carbon composition resistor • No "sintering effect" caused by high surge that greatly decreases resistance value • Replaces carbon composition resistor • Conformal multi-layer non-flammable coating • Products meet RoHS requirements and do not contain substances of very high concern indentified by European Chemicals Agency	In Production	Request
PVM	Firstohm	Melf	Resistors	Passive Components	300	300	-55 to 155	300000000 to 39000000000	300 to 39000	0.4 to 1	1.35 to 2.2	3.52 to 5.9	• SMD enabled structure • Anti-surge feature available • Pure tin-plated termination for excellent solderability propietary thin film handles much higher working voltage than general purpose resistors • Heat dissipation is much better than chip resistor • Stronger mechanical structure to denure vibration and thermal shock	In Production	Request
SWMT	Firstohm	Melf	Resistors	Passive Components			-55 to 200	1000 to 470000	0.001 to 0.47	1 to 4	3 to 5.1	8.5 to 14.6	• Granted multination patents • Enhanced welded spot is reliable against surge • Fast-acting fuse device for high-power applications • Advanced combined anti-surge & fast-fuse structure • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1420 • Thermal fuse to protect against overheating in electronic products • SMD enabled structure • RoHS / REACH Compliant	In Production	Request
SWAT	Firstohm	Axial lead type	Resistors	Passive Components			-55 to 200	1000 to 470000	0.001 to 0.47	1 to 3	4.5 to 5.5	11 to 15.5	• Granted multination patents • Enhanced welded spot is reliable against surge • Fast-acting fuse device for high-power applications • Advanced combined anti-surge & fast-fuse structure • Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1420 • Thermal fuse to protect against overheating in electronic products • RoHS / REACH Compliant • Reflow-soldering safe • Low TCR to ensure stable power output	In Production	Request
M	Firstohm	Axial lead type	Resistors	Passive Components	300 to 900	300 to 900	-55 to 155	100 to 10000000000	0.0001 to 10000	0.17 to 2	1.9 to 5.5	3.2 to 15.5	• Conformal multi-layer coating • Color code per MIL & EIA standards • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MP	Firstohm	Axial lead type	Resistors	Passive Components	300 to 700	300 to 700	-55 to 125	10000 to 1000000000	0.01 to 1000	0.17 to 0.5	1.9 to 3.2	3.2 to 9	• Conformal multi-layer coating • Color code per MIL & EIA standards • Special tin-plated electrolytic copper lead wir • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
PMA	Firstohm	Axial lead type	Resistors	Passive Components	300 to 700	300 to 700	-55 to 155	10000 to 1000000000	0.01 to 1000	0.4 to 1.2	1.9 to 5.5	3.2 to 15.5	• Conformal multi-layer coating • Low temperature coefficient and tolerances • Excellent stability • Superior power handling • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
EFR	Firstohm	Axial lead type	Resistors	Passive Components	500	500	-55 to 200	1000 to 1000000000	0.001 to 1000	0.5 to 5	2.4 to 8	6.5 to 19	• Flameproof multi-layer coating equivalent to UL 94 V-0 • High power handling • Anti-surge capability • Products meet RoHS requirements and do not contain substances of very high concern indentified by European Chemicals Agency	In Production	Request
HVR	Firstohm	Axial lead type	Resistors	Passive Components	500 to 1000	500 to 1000	-55 to 155	91000000 to 100000000000	91 to 100000	0.25 to 3	2.6 to 8	6.5 to 24	• IEC60065 & UL1676 Compliant • Special conductive film withstands high voltage • Maximum working voltage far over that of general purpose resistors • Suitable for applications such as TV's, high voltage power supply, and high voltage detection • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
MVR	Firstohm	Axial lead type	Resistors	Passive Components	300 to 1000	300 to 1000	-55 to 155	47000000 to 100000000000	47 to 100000	0.25 to 2	1.9 to 5.5	3.2 to 15.5	• Higher working voltage with improved reliability • Proprietary conductive film • Especially suitable for SMPS & lighting devices • Low-cost alternative to metal-glazed resistors • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
CSM	Firstohm	Melf	Resistors	Passive Components	200 to 700	200 to 700	-55 to 150	10 to 510	0.00001 to 0.00051	0.5 to 3	1.35 to 4	3.52 to 10.5	• Low ohmic value • High power handling with superior reliability and stability • Conformal multi-layer coating against humidity • SMD enabled structure with excellent solderability • Heat dissipation is much better than chip resistor (Especially suitable for air cooling) • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern idnetified by European Chemicals Agency	In Production	Request
MM102	Firstohm	Melf	Resistors	Passive Components	150	150	-55 to 125	0 to 2200000000	0 to 2200	0.2	1.1	2.1	• AEC-Q200 Compliant • SMD enabled structure • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by Euopean Chemicals Agency	In Production	Request
MO	Firstohm	Axial lead type	Resistors	Passive Components	350 to 1000	350 to 1000	-55 to 200	100 to 220000000	0.0001 to 220	0.5 to 7	3.2 to 8	9 to 31.5	• Flameproof multi-layer coating equivalent to UL 94 V-0 • Solvent resistant • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
PWR	Firstohm	Axial lead type	Resistors	Passive Components	500	500	-55 to 150	220 to 1000000000	0.00022 to 1000	0.6 to 2	2.4 to 4	6.5 to 11	• Conformal multi-layer coating • Color code per MIL & EIA standards • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
WA	Firstohm	Axial lead type	Resistors	Passive Components			-55 to 200	100 to 3300000	0.0001 to 3.3	0.5 to 8	3.2 to 8	8.8 to 31.5	• Flameproof multi-layer coating equivalent to UL 94 V-0 • Color Code per MIL & EIA standards • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
C3	Firstohm	Axial lead type	Resistors	Passive Components	800	800	-55 to 200	33000 to 22000000	0.033 to 22	1	5	15.5	• Innovative and cost effective C3 technology • Conforms to ANSI/AAMI EC53:2013/ IEC 60601-2-27:2011 • Suitable replacement for ceramic composition resistors, which are required in most applications • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
C3M100	Firstohm	Melf	Resistors	Passive Components	800	800	-55 to 200	33000 to 22000000	0.033 to 22	1	4.6	14.5	• SMD enabled structure • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Suitable replacement for ceramic composition resistors, which are requirement in most applications • Producrs meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
IG	Firstohm	Axial lead type	Resistors	Passive Components			-55 to 155	1000 to 150000	0.001 to 0.150	0.17	1.7	3.15	• Special coating technique to ensure fast ignition • Color code per MIL & EIA standards • Special conductive film to fuse at high temperature • Auto cut-off after fusing, no sustaining fire hazard • Special tin-plated electrolytic copper lead wire for optimal ease of soldering and mounting • Products meet RoHS reqiurements and do not contain substances of very high concern identified by European CHemicals Agency	In Production	Request
ISC	Firstohm	Melf	Resistors	Passive Components	500	500	-55 to 200	1000000 to 10000000	1 to 10	0.5 to 3	3.5 to 4.5	10.5 to 22.5	• Excellent in heat dissipation than fiberglass resistor • Dedicatedly designed for high-voltage spark ignition systems • Proprietary ceramic composite withstands high-voltage surge impacts with long-term stability • One of few sources in the world capable of manufacturing such type of resistor • RoHS and REACH compliant	In Production	Request
ISW	Firstohm	Melf	Resistors	Passive Components	500	500	-40 to 180	1000000 to 5000000	1 to 5	0.5 to 3	4 to 4.5	10.5 to 22.5	• Excellent in heat dissipation than fiberglass resistor • Dedicatedly designed for high-voltage spark ignition systems • Enhanced weld spot is reliable against surge with long-term stability • RoHS and REACH compliant	In Production	Request
SLC	Firstohm	Melf	Resistors	Passive Components	250	250	-55 to 125	1000 to 9100000000	0.001 to 9100	0.17 to 0.5	1.35 to 3	3.52 to 8.5	• Specially treated metal caps withstands abrasions, impacts and corrosions, so as to reduce contact resistance during operation • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European CHemicals Agency	In Production	Request
FGE	Firstohm	Axial lead type	Resistors	Passive Components	500	500	-55 to 155	2200000 to 15000000	2.2 to 15	0.25 to 0.5	2.4	6.5	• Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1412 • Color Code per MIL & EIA standards • Special tin-plated electrolytic copper lead wire • Products meet RoHS requirements and do not contain substances of very high concern identified by Europeans Chemicals Agency	In Production	Request
FM	Firstohm	Melf	Resistors	Passive Components	300	300	-55 to 155	2200 to 10000000	0.0022 to 10	0.33 to 0.5	2.2	5.9	• SMD enabled structure • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Excellent solderability termination • RoHS and REACH compliant	In Production	Request
SCP	Firstohm	Axial lead type	Resistors	Passive Components	350 to 700	350 to 700	-55 to 155	2200 to 10000000	0.0022 to 10	0.5 to 3	3.2 to 5	9 to 13.5	• Advanced multi-functional design • Cut-off on overload or accidental short circuit • Transient withstanding for power-line coupling • Flameproof multi-layer coating equivalent to UL 94 V-0 • Flameproof feature equivalent to overload test UL 1412 • Possible alternative to wire-wound resistors • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
ZOM	Firstohm	Axial lead type	Resistors	Passive Components			-55 to 155	10	0.0001		1.8 to 2.4	3.2 to 6.5	• Conformal multi-layer coating against humidity • Very low resistance • Stable metal film construction • Special tin-plated deoxygenized copper wire for resistance stabilization during operation • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
HFT	Firstohm	Melf	Resistors	Passive Components	150 to 700	150 to 700	-55 to 125	24900 to 75000	0.0249 to 0.075	0.2 to 2	1.1 to 3	2.1 to 8.5	• SMD enabled structure • Superior frequency response • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request
CM	Firstohm	Melf	Resistors	Passive Components	200 to 500	200 to 500	-55 to 155	1000 to 10000000000	0.001 to 10000	0.25 to 0.5	1.35 to 2.2	3.52 to 5.9	• SMD enabled structure • Excellent solderability termination • Heat dissipation is much better than chip resistor • Stronger mechanical structure to endure vibration and thermal shock • Products meet RoHS requirements and do not contain substances of very high concern identified by European Chemicals Agency	In Production	Request