GFEVF300‑series north‑american style semiconductor dc power fuse 300VDC 35‑2500A aR class protection

GFEVF300 North American Style aR Semiconductor DC Fuse 250-300VDC 35-2500A

GFEVF300 North American Style aR Semiconductor DC Fuse 250-300VDC 35-2500A is north-american standard high-speed semiconductor DC power fuse. Operation class aR for semiconductor device short-circuit protection. Rated 250‑300VDC, max 50kA breaking capacity, low arc‑voltage and low let‑through I²t value. Supports parallel connection for higher ampacity. Complies with UL‑248, IEC 60269‑4, CE and RoHS. Widely used for battery pack, DC drives, power converters, rectifiers and DC relay backup protection.</p>

connection for higher ampacity. Complies with UL‑248‑13, IEC 60269‑4, CE and RoHS. Widely used for battery pack, DC drives, power converters, rectifiers and DC relay backup protection.

Key Features

• Model Series: GFEVF300 north‑american style semiconductor DC power fuse
• Rated Voltage: 250‑300 VDC
• Current Range: 35A‑2500A, Operation Class: aR
• Max Breaking Capacity: 50kA @300VDC
• Time Constant: 2.5±0.5 ms
• Low arc‑voltage, low energy let‑through I²t characteristics
• Low watt losses, superior cycling capability
• Parallel installation permitted for higher ampacity within dimensional limits
• High mechanical shock & vibration resistance ≥20g
• Compliant: UL‑248‑13, IEC 60269‑4, CE, RoHS; REACH available upon request

General Technical Specifications

Product Series	GFEVF300‑Series North‑American Style Semiconductor DC Power Fuse
Rated Voltage	250‑300 V DC
Rated Current Range	35A‑2500A (aR operation class)
Max Breaking Capacity	50kA @300VDC
Time Constant	2.5±0.5 ms
Vibration Resistance	≥20g
Standards Compliance	UL‑248‑13, IEC60269‑4, CE, RoHS
Operating Temperature	‑5℃ ~ +40℃(regular);‑40℃~+85℃(allowable)

Part Number List & Electrical Parameters

Rated Current	Pre‑arc A²s	Clearing A²t	Power Loss(W)
35A	50	230	4.2
40A	60	310	5.2
45A	80	390	5.7
50A	100	520	6.0
60A	140	740	8.1
70A	330	1400	7.2
80A	430	1850	8.1
90A	570	2450	9.0
100A	740	3150	10.0
125A	1130	4850	12.5
150A	1620	6950	15.5
175A	2170	9300	18.5
200A	2790	12000	22
225A	3210	14700	24
250A	3960	18100	27
275A	4720	21600	31
300A	6000	27300	32
350A	10600	48600	39
400A	14500	66100	44
450A	22100	101000	49
500A	28000	128000	54
600A	41100	188000	62
700A	48800	190000	72
800A	59000	230000	84
1000A	94000	360000	100
1200A	922000	750000	103
1500A	120000	880000	140
1600A	160000	1200000	140
2000A	320000	2300000	151
2500A	670000	4700000	163

Application Scenarios

GFEVF300‑series north‑american style semiconductor dc power fuse 300VDC 35‑2500A aR class is designed for semiconductor‑related DC‑system protection: energy‑storage battery‑pack, DC drives, power converters, rectifier equipment and DC relay backup protection. aR‑class high‑speed characteristic provides reliable short‑circuit protection for power semiconductors under heavy‑fault‑current conditions.

Installation & Operating Notes

• Bolt‑on mounting type; apply proper bolt torque to avoid poor contact and over‑heating risk.
• Recommended continuous operating current ≤75% of fuse rated‑current; apply temperature‑derating factor for ambient temperature over 40℃.
• For closed‑box / high‑altitude installation (>2000m), perform rated‑current derating in accordance with datasheet requirements.
• Parallel mounting is allowed only within dimensional and specification guidelines for higher ampacity.
• Do NOT replace fuse under live DC load unless equipped with certified load‑break switchgear.
• Replace fuse immediately if mechanical damage, crack or deformation occurs on fuse body.
• Additional reliability validation test shall be conducted for extremely high‑vibration working environments.

Packing & Supply

Standard bulk package. Sample testing support, OEM customization, stable mass‑volume supply for energy‑storage, power‑converter and new‑energy equipment manufacturers. REACH declaration available upon customer request.

अक्सर पूछे जाने वाले प्रश्न

Q: What rating for GFEVF300‑series north‑american style semiconductor dc power fuse 300VDC 35‑2500A aR class?
A: Rated 250‑300VDC, current range 35‑2500A, aR semiconductor‑protection class, max breaking capacity up to 50kA@300VDC.

Q: What is aR‑class operation for this fuse?
A: aR class is semiconductor‑protecting high‑speed fuse class, designed for fast short‑circuit protection of power semiconductor devices.

Q: What standards does GFEVF300‑series comply with?
A: UL‑248‑13, IEC60269‑4, CE, RoHS compliant; REACH document available on request.

Q: Main application scenarios for GFEVF300‑series?
A: Energy‑storage battery‑pack, DC drives, power converters, rectifiers and DC relay backup semiconductor short‑circuit protection.

GFEVF300-Semiconductor-fuse