High Speed DC Fuse‑GFEVT500‑K‑51E Series Square‑Body Fuse,100A‑800A 500VDC,aR Class 50kA Breaking Capacity RoHS
GFEVT500‑K‑51E series high‑speed square‑body DC fuse,100A‑800A 500VDC,aR‑class 50kA breaking capacity, RoHS REACH for battery & energy‑storage short‑circuit backup protection.
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GFEVT500-xxx KN-51E
GFEVT500-xxx K-51E
GFEVT500‑K‑51E Series High‑Speed Fuse is size‑1# square‑body fast‑acting high speed dc fuse for new‑energy DC equipment backup short‑circuit protection. aR performance class, rating 100A‑800A 500VDC, max 50kA interrupting capacity, time constant ≤3 ms. Two variants: K‑type with fuse blow indicator and KN‑type without indicator. Features low I²t, low watt‑loss, superior cycling capability, high vibration‑resistance ≥20g acceleration. RoHS compliant, REACH declaration available upon request. Widely deployed for battery pack, energy‑storage systems and DC‑relay backup protection.
GFEVT500-K-51E-Series.-100-800A-500Vdc-fast-acting-fuse
Product At A Glance
| Item | Parameter |
|---|---|
| Product Series | GFEVT500‑K‑51E Series, Size‑1# Square‑Body Fast‑Acting Fuse |
| Current Range | 100A‑800A |
| Rated Voltage | 500VDC |
| Interrupting Capacity | 50kA @500VDC; Minimum breaking current ≥3.0In |
| Time Constant | ≤3 ms |
| Performance Class | aR (Semiconductor / power‑device backup short‑circuit protection) |
| Variant Options | K‑type: with blow indicator; KN‑type: without blow indicator |
| Standards Reference | UL 248.1, UL248.13; IEC 60269‑1, IEC 60269‑4 |
| Compliance | RoHS compliant, REACH declaration available upon request |
Model‑Specific Electrical Data @50kA 500VDC
| Part Number | Rated Amps | Melting A²s | Clearing A²s | 100% Power Loss(W) |
|---|---|---|---|---|
| GFEVT500‑100K‑51E | 100A | 820 | 7370 | 23 |
| GFEVT500‑125K‑51E | 125A | 1340 | 11910 | 28 |
| GFEVT500‑160K‑51E | 160A | 2410 | 21550 | 35 |
| GFEVT500‑200K‑51E | 200A | 3030 | 26910 | 38 |
| GFEVT500‑250K‑51E | 250A | 5050 | 45680 | 52 |
| GFEVT500‑275K‑51E | 275A | 6140 | 59220 | 55 |
| GFEVT500‑315K‑51E | 315A | 7910 | 75060 | 64 |
| GFEVT500‑350K‑51E | 350A | 10520 | 68 | |
| GFEVT500‑400K‑51E | 400A | 15060 | 143820 | 72 |
| GFEVT500‑450K‑51E | 450A | 20830 | 205160 | 78 |
| GFEVT500‑500K‑51E | 500A | 26760 | 264150 | 87 |
| GFEVT500‑550K‑51E | 550A | 36520 | 363150 | 92 |
| GFEVT500‑630K‑51E | 630A | 53800 | 554220 | 100 |
| GFEVT500‑700K‑51E | 700A | 71550 | 742770 | 102 |
| GFEVT500‑800K‑51E | 800A | 99540 | 1035000 | 113 |
Key Features & Benefits
- aR‑class square‑body fast‑acting DC fuse, low‑I²t characteristic, excellent current‑limiting performance for semiconductor‑device backup short‑circuit protection
- High interrupting‑capacity:50kA @500VDC; time constant ≤3 ms, minimum breaking current ≥3.0In
- Two mechanical options: K‑type with fuse blow indicator; KN‑type without indicator for cost‑optimized projects
- Low watt‑loss design, superior cycling‑capability, wide temperature tolerance, vibration‑resistance ≥20g acceleration
- Supports full derating corrections for high‑temperature, high‑altitude and forced‑air‑cooling operating‑conditions
- Complies with UL248.1‑13 & IEC60269‑1‑4; RoHS compliant, REACH documents available for export‑oriented projects
Application Overview
GFEVT500‑K‑51E series square‑body high‑speed fuses serve as short‑circuit backup‑protection for heavy‑duty new‑energy DC‑equipment. Mainly deployed for battery‑pack protection, energy‑storage power‑systems and DC‑relay backup‑protection.
Critical Tip: Long‑term continuous operating‑current shall ≤75% of fuse rated‑current. Apply temperature‑altitude derating‑factors for enclosed‑cabinet installation. Always disconnect power before fuse replacement.
Installation & Operating Notes
- Match copper‑cable cross‑section in accordance with datasheet table to guarantee stable contact performance.
- Long‑term continuous working‑current cannot exceed 75% of nominal fuse ampere‑rating.
- Implement current‑derating when ambient‑temperature＞40℃ or installation‑altitude＞2000 m in closed‑cabinet environment.
- Mounting can be vertical, horizontal or inclined; avoid gravity‑vibration interference for spring‑contact construction.
- Replace fuse immediately if mechanical‑damage occurs; avoid live‑load fuse‑replacement unless equipment design explicitly permits.
Typical Applications
- New‑energy battery‑pack over‑current and short‑circuit backup‑protection
- BESS energy‑storage system DC‑feeder protection
- DC‑relay and power‑semiconductor device backup short‑circuit‑protection
- Heavy‑duty industrial 500VDC power‑distribution equipment
- New‑energy converter‑inverter internal DC‑side protection
Pair GFEVT500‑K‑51E series fuse with our matching heavy‑duty semiconductor fuse holders for a complete heavy‑current DC‑protection assembly.
Safety Reminders
- Disconnect all DC‑power before servicing or changing fuses. Strictly prohibit live‑line 500VDC high‑voltage operation.
- Follow 75% rated‑current continuous‑working derating‑rule; extra‑derating required for high‑temperature / high‑altitude closed‑cabinet installation.
- Select fuse breaking‑capacity higher than prospective short‑circuit‑current of your system.
- Refer to official datasheet for I‑t curve, derating‑curves and dimension drawings before bulk‑procurement.
- Any mechanically‑damaged fuse‑unit must be discarded and replaced immediately.
Häufig gestellte Fragen
Q: What is GFEVT500‑K‑51E series high‑speed fuse?
A: GFEVT500‑K‑51E is size‑1# square‑body aR‑class fast‑acting DC fuse, rating 100A‑800A @500VDC, 50kA interrupting‑capacity. Two variants K (with indicator) / KN (no indicator). Used for battery‑pack and energy‑storage backup‑protection, RoHS compliant, REACH available upon request.
Q: What is the continuous‑current usage rule?
A: Long‑term operating‑current must be ≤75% of fuse rated‑current. Additional derating needed for high‑temperature and high‑altitude enclosed‑cabinet applications.
Q: What variants are available for this series?
A: K‑type: with fuse blow‑out indicator; KN‑type: without indicator for cost‑sensitive projects.
Q: What standards does this series comply with?
A: Reference standards UL 248.1, UL248.13, IEC 60269‑1, IEC 60269‑4; RoHS compliant, REACH declaration can be provided for overseas‑export‑projects.
Q: Where is GFEVT500‑K‑51E mainly applied?
A: For battery‑pack protection, BESS energy‑storage cabinets, DC‑relay backup‑protection and heavy‑duty 500VDC new‑energy converter‑inverter DC‑side circuits.
Request Quotation & Technical Support
Please provide target part‑number(K‑type or KN‑type), order‑quantity, system short‑circuit‑current, ambient‑temperature and altitude‑conditions. Our engineering‑team can deliver full datasheet, bulk‑price quotation and component‑selection‑guidance for battery‑energy‑storage DC‑protection‑projects.
GFEVT500‑K‑51E Series High‑Speed Fuse · EssFuse. Confirm datasheet I‑t, derating and dimension specs before mass‑production.
