250V DC Fuse 16-500A | GFEVT250 EV Fast Acting Fuse
GFEVT250 series 250Vdc fast acting EV fuse, 16-500A, 50kA breaking. IATF16949 automotive-grade DC fuse for EV/HEV battery pack and auxiliary circuits. UL 248, IEC 60269, JASO D622.
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GFEVT250 Series 250Vdc Fast Acting DC Fuse | 16–500A, 50kA, Automotive Grade
The GFEVT250 Series 250Vdc Fast Acting DC Fuse is a high-speed fast-acting fuse family designed for EV/HEV battery pack protection and auxiliary DC circuits. This GFEVT250 Series 250Vdc Fast Acting DC Fuse covers a broad current range from 16A to 500A across three compact body sizes and is manufactured under IATF16949 automotive quality control. It complies with global standards including UL 248.1/248.13, IEC 60269, GB 13539 and JASO D622. You can check standard specifications from official websites of UL and IEC. Under high fault current conditions, this fuse can open up to 10 times faster than conventional fuses, delivering low watt loss and robust vibration resistance for harsh automotive DC systems.
Key Features
- Rated Voltage: 250Vdc
- Rated Current Range: 16A – 500A (21 standard ratings)
- Breaking Capacity: 50kA
- Fuse Type: Fast-Acting (high-speed)
- Automotive Grade: IATF16949 Certified
- 3 Body Sizes: 18R (16–100A), 30R (125–200A), 38R (225–500A)
- Designed for EV/HEV Battery Pack & Auxiliary Circuit Protection
- Up to 10x faster opening speed under high fault currents
- Low watt loss for improved energy efficiency
- Supports parallel installation for higher ampacity within limited space
- Excellent vibration and shock resistance
- Compliance: UL 248.1/248.13, IEC 60269.1/.4, GB 13539.1/.4, JASO D622, CE, RoHS
Body Size Overview
| Body Size | Current Range | Mounting Bolt | Torque | Typical Application |
|---|---|---|---|---|
| 18R | 16A – 100A | M5 | 4.5±1.0 N·m | Auxiliary circuits, small power modules |
| 30R | 125A – 200A | M6 | 5.5±1.0 N·m | HEV battery branch protection |
| 38R | 225A – 500A | M8 | 11±1.0 N·m | Main DC bus, large EV battery packs |
Electrical Ratings
18R Series (16–100A, M5 Mounting Bolt)
| Part Number | Rated Current (A) | Melting I²t (A²s) | Clearing I²t (A²s) | Power Loss @100% (W) |
|---|---|---|---|---|
| GFEVT250-16A-18R | 16 | 199 | 82 | 2.9 |
| GFEVT250-20A-18R | 20 | 291 | 152 | 3.6 |
| GFEVT250-25A-18R | 25 | 592 | 97 | 4.0 |
| GFEVT250-32A-18R | 32 | 974 | 92 | 5.2 |
| GFEVT250-35A-18R | 35 | 1196 | 107 | 5.6 |
| GFEVT250-40A-18R | 40 | 1728 | 173 | 6.1 |
| GFEVT250-50A-18R | 50 | 3051 | 552 | 7.2 |
| GFEVT250-63A-18R | 63 | 5272 | 674 | 8.8 |
| GFEVT250-80A-18R | 80 | 9074 | 1609 | 10.8 |
| GFEVT250-100A-18R | 100 | 15547 | 1899 | 13.3 |
30R Series (125–200A, M6 Mounting Bolt)
| Part Number | Rated Current (A) | Melting I²t (A²s) | Clearing I²t (A²s) | Power Loss @100% (W) |
|---|---|---|---|---|
| GFEVT250-125A-30R | 125 | 20285 | 1952 | 14.3 |
| GFEVT250-160A-30R | 160 | 34281 | 2009 | 18.2 |
| GFEVT250-200A-30R | 200 | 57282 | 3721 | 22.0 |
38R Series (225–500A, M8 Mounting Bolt)
| Part Number | Rated Current (A) | Melting I²t (A²s) | Clearing I²t (A²s) | Power Loss @100% (W) |
|---|---|---|---|---|
| GFEVT250-225A-38R | 225 | 68882 | 1305 | 26.1 |
| GFEVT250-250A-38R | 250 | 84772 | 5462 | 27.7 |
| GFEVT250-315A-38R | 315 | 140130 | 40626 | 36.2 |
| GFEVT250-350A-38R | 350 | 190720 | 56669 | 40.2 |
| GFEVT250-400A-38R | 400 | 280220 | 94527 | 46.1 |
| GFEVT250-450A-38R | 450 | 389230 | 133106 | 52.8 |
| GFEVT250-500A-38R | 500 | 560500 | 167310 | 60.0 |
I²t values tested at 50kA / 250Vdc. DC cold resistance measured at <10% rated current, 25°C ambient.
Mechanical Dimensions (mm)
| Dimension Item | 18R (16–100A) | 30R (125–200A) | 38R (225–500A) |
|---|---|---|---|
| Overall Length | 55.5 ± 2 | 64.5 ± 2 | 88.5 ± 2 |
| Body Length | 41.5 ± 2 | 47 ± 2 | 60 ± 2 |
| Body Diameter | 35.5 ± 2 | 29.5 ± 2 | 31 ± 2 |
| Body Width | 17.5 ± 1 | 29 ± 1 | 37 ± 1 |
| Mounting Hole Spacing | 9.5 ± 0.8 | 10.8 ± 0.8 | 16 ± 0.8 |
| Mounting Bolt | M5 | M6 | M8 |
| Recommended Torque | 4.5±1.0 N·m | 5.5±1.0 N·m | 11±1.0 N·m |
[ Insert dimension drawing image here ]
Electrical & Environmental Specifications
| Item | Specification |
|---|---|
| Rated Voltage | 250 Vdc |
| Rated Current | 16A – 500A |
| Breaking Capacity | 50kA |
| Fuse Characteristic | Fast-Acting (High Speed) |
| Body Material | Fiberglass / Ceramic |
| Available Body Sizes | 18R / 30R / 38R |
| Quality Management System | IATF16949 |
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -40°C ~ +120°C |
| Vibration Resistance | ≥ 20g |
| Compliance Standards | UL 248.1/248.13, IEC 60269.1/.4, GB 13539.1/.4, JASO D622, CE, RoHS |
Typical Applications
The GFEVT250 Series 250Vdc Fast Acting DC Fuse is widely adopted in multiple DC protection scenarios:
- Electric Vehicle (EV) & Hybrid Vehicle (HEV) Battery Packs
- EV Auxiliary DC Circuits
- On-Board Charger (OBC) Protection
- DC Relay Backup Protection
- Electrical Energy Storage Systems
- Low-Voltage DC Distribution Systems
Installation & Derating Guidelines
| Item | Description |
|---|---|
| Current Derating | Maintain continuous operating current ≤ 75% of rated current |
| Ambient Temperature | Normal range -5°C to +40°C; apply derating factor Kt above 40°C |
| Altitude | Normal use below 2000m; apply correction factor Ka above 2000m |
| Forced Cooling | Forced air cooling increases ampacity (correction factor Kv) |
| Mounting | Vertical, horizontal or angled installation available |
| Parallel Use | Parallel mounting allowed for higher ampacity; professional design review required |
Frequently Asked Questions
1. Why is this fuse suitable for EV applications?
The GFEVT250 Series 250Vdc Fast Acting DC Fuse follows IATF16949 automotive quality standards and meets JASO D622. It features strong vibration resistance and ultra-fast response to short-circuit faults, making it reliable for EV battery pack and auxiliary circuit protection.
2. What are the three body sizes for?
Three body sizes cover the full 16A–500A range. 18R (M5 bolt) for 16–100A, 30R (M6 bolt) for 125–200A, and 38R (M8 bolt) for 225–500A.
3. What applications use 250Vdc fuses?
250Vdc fuses are commonly used in EV auxiliary systems, low-voltage battery packs, auxiliary DC loads and small energy storage systems. They also protect 12V / 24V / 48V DC conversion circuits.
4. What standards does this fuse comply with?
It meets international standards including UL 248.1/248.13 (USA), IEC 60269.1/.4 (International), GB 13539.1/.4 (China), JASO D622 (Japan), CE and RoHS.
5. How many ampere ratings are available?
There are 21 standard current ratings ranging from 16A to 500A across three body sizes.
6. Can these fuses be connected in parallel?
Yes. Parallel installation achieves higher total ampacity within compact space. Please complete a professional design review before parallel application.
Downloads
- Datasheet: GFEVT250 Series Datasheet (PDF)
- Time-Current Curves: included in datasheet
- REACH Declaration: available upon request
