GFEVT1000‑K‑51E 1000VDC Fast‑Acting DC Fuse 100‑630A | EssFuse
EssFuse GFEVT1000‑K‑51E square-body aR fast-acting DC fuse for 1000VDC, rated 100A‑630A, 50kA interrupting capacity. Available with or without blow indicator, ideal for ESS energy storage and high-voltage battery pack protection. UL248.13 & IEC60269.4 approved.
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GFEVT1000‑K‑51E Series Fast‑Acting Square‑Body DC Fuse Link,100‑630A 1000VDC Size 1#
Product Overview
EssFuse GFEVT1000‑K‑51E is Size 1# square‑body fast‑acting aR‑class DC fuse link, rated 1000 VDC. Optimized for high‑voltage new‑energy DC circuit protection. Two versions available: K = with blow indicator, KN = without indicator. Delivers ≤3 ms ultra‑short time‑constant, max 50 kA@1000 VDC interrupting capacity. Suitable for energy‑storage system, high‑voltage battery pack and DC relay backup protection. Compliant with UL 248.13 & IEC 60269‑4, RoHS compliant.
Key Features & Benefits
- ✅ Pure‑DC design, excellent high‑voltage DC fault‑breaking performance
- ✅ Max interrupting capacity：50 kA @1000 VDC；minimum breaking current ≥3×In
- ✅ Ultra‑fast response：Time‑constant ≤ 3 ms
- ✅ Two variants: K(with indicator) / KN(without indicator)
- ✅ Low watt‑loss, compact Size 1# footprint with high ampacity
- ✅ High mechanical shock‑vibration resistance ≥20 g, wide ambient temperature tolerance
- ✅ RoHS‑compliant; REACH statement available on request
- ✅ Flush‑end custom contact for heavy‑current cabinet installation
Typical Applications
- High‑voltage lithium‑ion battery pack protection
- Energy‑storage system(ESS) main DC circuit protection
- Backup protection for DC relay / DC contactor
- Heavy‑current 1000VDC power distribution
General Electrical Specifications
| Item | Parameter |
|---|---|
| Rated DC Voltage | 1000 VDC |
| Rated Current Range | 100 A ~ 630 A |
| Fuse Class | aR (fast‑acting semiconductor / DC protection) |
| Max Interrupting Capacity | 50 kA @1000 VDC |
| Minimum Breaking Current | ≥ 3 × In |
| Time Constant | ≤ 3 ms |
| Mechanical Size | Size 1# Square‑Body |
| Contact Type | Flush‑end custom contact |
| Product Variant | K‑version(with indicator); KN‑version(without indicator) |
| Standards & Approvals | UL 248.1 / UL 248.13; IEC 60269‑1 / IEC 60269‑4 |
| Compliance | RoHS; REACH document upon request |
| Storage Temperature | ‑40 ℃ ~ 120 ℃ |
| Normal Operating Ambient Temp. | ‑5 ℃ ~ +40 ℃ (no‑derating) |
| Allowable Operating Temp. | ‑40 ℃ ~ +85 ℃ |
| Anti‑Vibration Capability | ≥ 20 g |
| Mounting | Vertical / Horizontal / Inclined installation |
Complete Model Ratings Table
Note: Replace suffix K with KN for version without fuse indicator, e.g. GFEVT1000‑630KN‑51E
| Part Number | Rated Current | Size | Melting A²s @50kA/1000VDC | Clearing A²t @50kA/1000VDC | Power Loss(W) @100%In |
|---|---|---|---|---|---|
| GFEVT1000‑100K‑51E | 100A | 1# | 980 | 4,400 | 42 |
| GFEVT1000‑125K‑51E | 125A | 1# | 1,180 | 5,300 | 46 |
| GFEVT1000‑160K‑51E | 160A | 1# | 2,240 | 10,050 | 50 |
| GFEVT1000‑200K‑51E | 200A | 1# | 4,360 | 19,970 | 56 |
| GFEVT1000‑250K‑51E | 250A | 1# | 9,320 | 40,870 | 62 |
| GFEVT1000‑315K‑51E | 315A | 1# | 17,900 | 79,060 | 68 |
| GFEVT1000‑350K‑51E | 350A | 1# | 23,000 | 107,200 | 76 |
| GFEVT1000‑400K‑51E | 400A | 1# | 35,100 | 154,100 | 86 |
| GFEVT1000‑450K‑51E | 450A | 1# | 50,600 | 221,100 | 95 |
| GFEVT1000‑500K‑51E | 500A | 1# | 83,500 | 288,100 | 102 |
| GFEVT1000‑550K‑51E | 550A | 1# | 114,700 | 391,900 | 133 |
| GFEVT1000‑630K‑51E | 630A | 1# | 155,000 | 445,000 | 140 |
Application Notes & Derating Guidance
- Continuous‑current suggestion: long‑term operating current ≤75 % of fuse rated‑current.
- Ambient‑temperature derating: Operating >40 ℃, apply temperature correction factor Kt; below‑5 ℃ pre‑arcing time slightly extends.
- Altitude derating(closed cabinet): Between 2000‑4500 m, derate rated‑current 2‑5 % per 1000 m elevation increase.
- Conductor sizing: Follow datasheet copper cross‑section table; >1250A apply 1.0‑1.4 A/mm² current‑density.
- Time‑Current Curve tolerance: ±15 % current error band; minimum breaking‑current =3 In.
Download & Resources
- Download 2D‑3D dimension drawing, time‑current curve, full datasheet PDF:GFEVT1000-K-51E_Series._100-630A_1000Vdc_fast-acting-fuse
- Manufacturer: Dongguan Gongfu Electronics (EssFuse)
