GFEVF500 Series DC Power Fuse 500VDC 35‑800A aR
North‑American‑style aR DC power fuse GFEVF500 Series,500VDC 35‑800A,50kA breaking capacity. For battery pack & ESS storage. CE RoHS compliant, download datasheet.
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GFEVF500‑Series North‑American‑Style DC Power Fuse, 500VDC 35A‑800A Class aR
The GFEVF500‑Series DC Power Fuse is a high‑performance bolt‑on aR‑class fast‑acting fuse engineered exclusively for DC‑system fault‑current protection. Rated for 500 Vdc with 35 A‑800 A current range and up to 50 kA rated breaking capacity (Time Constant:2.5±0.5 ms). This north‑american‑style cylindrical fuse delivers low arc‑voltage, low I²t energy let‑through and low watt‑loss, ideal for energy‑storage systems, battery pack protection, DC‑drives and power‑converter circuits. CE certified and RoHS‑compliant, designed to meet UL248.13 and IEC 60269.4 standards.
📄 Download Full Datasheet PDF GFEVF500 Series DC Power Fuse 500VDC 35‑800A aR
Key Features & Benefits
- ✅ Designed for pure DC‑application, excellent DC short‑circuit interrupting performance
- ✅ Rated Breaking Capacity: 50 kA @500 Vdc (Time Constant 2.5±0.5 ms), operation class aR
- ✅ Low arc‑voltage & low energy let‑through (I²t), minimise stress on protected components
- ✅ Low watt‑loss, reduce continuous‑operation heating & system energy waste
- ✅ Superior cycling capability, stable performance under repeated load fluctuation
- ✅ Can be applied in parallel configuration for higher total ampacity (follow sizing guidelines)
- ✅ High mechanical vibration & shock resistance, adapt for harsh industrial environments
- ✅ Wide operating ambient temperature tolerance, strong anti‑current‑impingement capacity
- ✅ CE approval, RoHS compliant, reference standard UL248.13 / IEC 60269.4
Typical Applications
GFEVF500 series DC fuses are widely adopted for over‑current & short‑circuit protection within high‑current DC industrial and energy‑storage equipment:
- 🔋 Electrical Energy‑Storage (ESS / Battery Energy‑Storage System)
- 🔋 Battery pack protection for industrial energy storage
- ⚡ DC‑Drives motor system protection
- ⚡ Power converters & rectifier equipment protection
- ⚡ Backup protection for DC relay contacts
Main Electrical Ratings
| Rated Voltage | 500 Vdc (max) |
| Rated Current Range | 35 A ~ 800 A |
| Rated Breaking Capacity | 50 kA @500 Vdc or lower |
| Time‑Constant Test Condition | 2.5 ± 0.5 ms |
| Operation Class | aR (semiconductor / DC fast‑acting protection) |
| Standards Reference | UL248.13, IEC 60269‑4 |
| Certifications | CE, RoHS Compliant |
Part Number List & Physical Case Diameter
GFEVF500‑XXA‑YYR: XX‑rated current; YY‑case diameter(20R /26R /31R /38R /51R)
- 20 mm case(20R): 35A‑60A
- 26 mm case(26R):70A‑150A
- 31 mm case(31R):125A‑250A
- 38 mm case(38R):225A‑450A
- 51 mm case(51R):450A‑800A
Mechanical Dimensions
All dimension unit in mm. Tolerance refer to datasheet drawing.
| Case Code | Current Range | A±1.5 | B±1 | C±1 | D±1.5 | E±0.5 | F±0.5 | H±1 | G±0.5 |
|---|---|---|---|---|---|---|---|---|---|
| 20R | 35‑60A | 81 | 20 | 40 | 60.5 | 8.5 | 15 | 3 | 13 |
| 26R | 70‑150A | 92 | 26 | 44 | 68.5 | 8.5 | 20 | 3 | 13 |
| 31R | 125‑250A | 92 | 31 | 46 | 72.5 | 8.5 | 25 | 6 | 12.5 |
| 38R | 225‑450A | 110 | 38 | 53 | 81.5 | 10.5 | 25 | 6 | 20 |
| 51R | 450‑800A | 110 | 51 | 53 | 81.5 | 10.5 | 40 | 6 | 20 |
Operating Conditions & Derating Rules
Temperature Condition
- Normal operating ambient temperature:‑5 ℃ ~ +40 ℃
- Allowable operating range:‑40 ℃ ~ +85 ℃
- Storage temperature:‑40 ℃ ~120 ℃
- Note: Continuous working current recommend ≤75% of fuse rated‑current.
Altitude Derating(Ka factor)
- Standard condition: altitude ≤2000 m without derating.
- Closed‑box installation above 2000 m: derate rated‑current 2‑5% per 1000 m elevation.
- Insulation gap correction should follow GB/T16935.1 for high‑altitude application.
Installation & Vibration Resistance
- Can install vertically, horizontally or inclined mounting.
- High‑frequency vibration resistance ≥20g acceleration.
- Forced air‑cooling can increase allowable operating current, follow Kv cooling‑correction curve in datasheet.
- Terminal contact resistance must be kept low to avoid extra temperature‑rise.
Characteristic Curves Reference
- Time‑Current Pre‑arcing curve(35‑250A /275‑800A)
- Instantaneous peak let‑through cut‑off curve
- Temperature derating coefficient curve
- Altitude derating coefficient curve
- Forced‑air cooling correction Kv curve
All graphic curves and full melting I²t clearing I²t data are available inside downloadable PDF datasheet.
FAQ — Technical & Commercial Questions
1: What does aR‑class mean for this DC power fuse?
A: aR is semiconductor‑protection class for high‑speed DC fuses, designed for fast short‑circuit fault‑clearing for power‑electronic and battery DC‑circuits, not general‑purpose cable‑protection gG class.
2: Can I get samples and full datasheet?
A: Yes, submit inquiry form to request engineering‑samples, datasheet PDF, dimension drawings or customized technical support.
Request Quotation / Technical Support
Please tell us target part‑number, required quantity, application condition(voltage, working‑current, ambient‑temperature, altitude). We will reply within 24 working hours.
