GFEVT1000‑A‑43E‑Series 1000Vdc Fast‑Acting Square‑Body DC Fuse (50A‑400A, Size01*, aR Class)
GFEVT1000‑A‑43E size01* fast‑acting dc fuse,1000Vdc,50‑400A,50kA@1000Vdc(L/R≤2ms),with/without indicator,aR‑class for ESS & DC relay.UL248.13,IEC60269.4,RoHS.Request datasheet & quote.
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GFEVT1000‑A‑43E‑Series 1000Vdc Fast‑Acting Square‑Body DC Fuse (50A‑400A, Size01*, aR Class)
The GFEVT1000‑A‑43E‑Series is compact Size01 square‑body fast‑acting DC fuse manufactured by GFEFUSE. Specifically, this aR‑class high‑speed fuse link rates for 1000Vdc and covers 50A‑400A current range. It achieves rated breaking capacity 50kA@1000Vdc with L/R ≤2 ms, and minimum breaking‑current ≥3×In. Furthermore, two mechanical variants are available: ‑A‑43E with blow‑out indicator and ‑AN‑43E without indicator. Therefore, it suits energy‑storage system short‑circuit backup and DC relay protection perfectly, while delivering superior cycling capability and low watt‑loss performance.
Product Overview
EssFuse GFEVT1000‑A‑43E is compact Size01 square‑body fast‑acting DC fuse built for heavy‑duty 1000Vdc DC circuits. Besides, its high‑voltage rating allows engineers to adopt smaller and more economical conductors for improved whole‑system efficiency. This fuse trips up to ten‑times faster under heavy fault‑current to offer reliable component‑level circuit protection. In addition, it features superior cycling capability, low watt‑loss, strong current‑impulse resistance and wide ambient‑temperature tolerance. Notably, high‑frequency vibration resistance reaches ≥20g acceleration for cabinet‑mount energy‑storage equipment. Meanwhile, time‑current characteristic curve holds tolerance within ±15% current‑direction error.
Key Features & Benefits
In particular, this compact Size01 fuse saves valuable cabinet mounting space for small‑to‑medium power DC projects. It comes with these core advantages:
- ✅ Rated voltage 1000Vdc, compact Size01* square‑body, save cabinet installation space
- ✅ Fast‑acting aR‑class protection; interrupt rating 50kA@1000Vdc (L/R ≤2 ms), minimum breaking‑current ≥3In
- ✅ Two mechanical options: ‑A‑43E with blow indicator; ‑AN‑43E without indicator, same electrical parameters
- ✅ Terminal: 2‑M6 threaded mounting holes, thread depth 9±1 mm
- ✅ Superior cycling capability; low watt‑loss, less heat generation
- ✅ Excellent anti‑shock & anti‑vibration performance ≥20g acceleration
- ✅ Mainly for energy‑storage system & DC relay backup short‑circuit protection
- ✅ RoHS compliant; REACH document available upon request
Main Electrical Ratings
Below lists consolidated electrical parameters. Meanwhile, all I²t test conditions run at 50kA @1000Vdc.
| Rated Voltage | 1000 Vdc |
| Rated Current Range | 50A‑400A (Size01*) |
| Operating Class | aR (semiconductor / DC equipment backup protection) |
| Rated Breaking Capacity | 50 kA @1000 Vdc, L/R ≤2 ms |
| Minimum Breaking Current | ≥3.0 × In |
| Test I²t Condition | 50 kA @1000Vdc |
| Time‑Current Curve Tolerance | ±15% current‑direction error |
| Recommended Continuous Current | ≤75% of nominal fuse rating |
| Terminal Thread | 2‑M6, thread depth 9±1 mm |
Complete Part‑Number Ratings Table
Note: Suffix ‑A‑43E = with indicator；‑AN‑43E = without indicator, both share identical electrical data.
| Part No. | Fuse Amps | Breaking Capacity | A²s Melting @50kA/1000Vdc | A²t Clearing @50kA/1000Vdc | 100% Power Loss(W) | Variant |
|---|---|---|---|---|---|---|
| GFEVT1000‑50A‑43E | 50A | 50kA | 137 | 1,000 | 16 | With indicator |
| GFEVT1000‑63A‑43E | 63A | 50kA | 215 | 1,620 | 19 | With indicator |
| GFEVT1000‑80A‑43E | 80A | 50kA | 410 | 3,145 | 23 | With indicator |
| GFEVT1000‑100A‑43E | 100A | 50kA | 740 | 5,645 | 29 | With indicator |
| GFEVT1000‑125A‑43E | 125A | 50kA | 1,460 | 10,860 | 34 | With indicator |
| GFEVT1000‑160A‑43E | 160A | 50kA | 2,535 | 19,850 | 41 | With indicator |
| GFEVT1000‑200A‑43E | 200A | 50kA | 5,070 | 38,200 | 46 | With indicator |
| GFEVT1000‑250A‑43E | 250A | 50kA | 8,970 | 68,550 | 51 | With indicator |
| GFEVT1000‑315A‑43E | 315A | 50kA | 18,200 | 142,950 | 61 | With indicator |
| GFEVT1000‑350A‑43E | 350A | 50kA | 26,400 | 199,500 | 66 | With indicator |
| GFEVT1000‑400A‑43E | 400A | 50kA | 38,750 | 293,500 | 74 | With indicator |
Mechanical Dimensions（‑A‑43E with indicator / ‑AN‑43E no indicator）
‑A‑43E & ‑AN‑43E share identical outline dimension; only internal blow‑indicator structure differs.
- Size: 80±2.5 mm, body width & height: 43±2 mm ×43±2 mm
- Mounting terminal hole: 2‑M6 threaded hole, thread depth 9±1 mm, pin hole diameter Ø17±1 mm
Insert dimension drawing WebP images for A‑43E and AN‑43E here.
Application Fields
For instance, designers pick this compact Size01 fuse for small‑and‑medium‑capacity energy‑storage and DC‑power‑equipment projects. Main scenarios:
- Electrical Energy‑Storage System（ESS/BESS）short‑circuit backup protection
- Backup protection for DC relay & DC contactor
- High‑voltage DC power cabinet, DC distribution unit protection
- Industrial DC power equipment & converter over‑current / short‑circuit protection
Standards & Approvals
First, this fuse references international industry specifications: UL 248.1, UL 248.13; IEC 60269‑1, IEC 60269‑4. In addition, it meets RoHS requirements. REACH document release available upon formal customer request. Meanwhile, time‑current characteristic accuracy holds ±15% current‑direction error.
Operating Conditions & Derating Rules
Storage condition
Product storage temperature‑40℃~+120℃; package storage‑40℃~+80℃. Humidity: RH≤70%@40℃, RH≤80%@30℃, RH≤90%@20℃.
Ambient‑Temperature Correction
Standard operating‑5℃ ~+40℃; allowable‑40℃ ~+85℃. However, apply temperature‑derating factor Kt above 40℃. Below‑5℃, low‑overload pre‑arcing time slightly extends.
Altitude Correction Ka
Normal altitude ≤2000 m. For closed‑box cabinet above 2000 m with internal temp>40℃: derate rated‑current 2%‑5% per 1000 m. As altitude rises between 2000‑4500 m, air insulation strength drops 12‑15% per 1000 m. Therefore, follow GB/T16935.1 for insulation‑gap correction. Formula: Ka = 1‑(H‑2000)/100*(0.5/100).
Continuous‑current rule
As an important installation note: long‑term operating current ≤75% × In.
Insert three charts: temperature‑derating Kt curve, altitude‑derating Ka curve, forced‑air‑cooling Kv curve.
Installation & Conductor Sizing Requirement
Adopt M6 screw for terminal mounting to guarantee stable contact resistance. You can install horizontally, vertically or tilted. Nevertheless, avoid gravity‑vibration negative impact for spring‑contact connections. In addition, keep sufficient insulation clearance between live parts and ground, add extra insulation margin for high‑altitude deployment. Replace mechanically‑damaged fuse immediately.
Frequently Asked Questions
1: What is breaking‑capacity & time‑constant of GFEVT1000‑A‑43E series?
A: Rated breaking‑capacity: 50kA @1000Vdc, L/R ≤2 ms; minimum breaking‑current ≥3 times nominal rated current (3In).
2: What is difference between suffix ‑A‑43E and ‑AN‑43E?
A: ‑A‑43E: built‑in fuse blow indicator; ‑AN‑43E: no indicator, same electrical performance, mechanical outline consistent.
3: What thread specification for terminal mounting?
A: Terminal screw thread: 2‑M6, thread depth 9±1 mm.
4: What is recommended long‑term continuous operating current?
A: Keep continuous working current ≤75% of fuse nominal ampere rating.
5: Which standards does this series comply with?
A: Reference UL248.1 / UL248.13, IEC60269‑1 / IEC60269‑4. RoHS compliant; we provide REACH declaration upon customer request.
6: Is altitude derating required for closed cabinet?
A: Yes. For closed cabinets internal temperature >40℃ above 2000 m altitude: derate rated‑current 2%‑5% per 1000 m elevation. However, open‑air installation normally ignores altitude impact.
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Form fields suggestion: Required rated current, Indicator option(A‑43E with indicator / AN‑43E non‑indicator), System DC voltage, Cabinet ambient temperature, Working altitude, Application scenario, Order quantity.
