GFEVT1000‑A‑59E‑Series 1000Vdc Fast‑Acting Square‑Body DC Fuse (100A‑800A, Size2#, aR Class)
GFEVT1000‑A‑59E size2# fast‑acting dc fuse,1000Vdc,100‑800A,50kA@1000Vdc(L/R≤5ms),aR‑class for battery pack & ESS.UL248.13,IEC60269.4,RoHS.Request datasheet & quote.
Get a Quote
GFEVT1000‑A‑59E‑Series 1000Vdc Fast‑Acting Square‑Body DC Fuse (100A‑800A, Size2#, aR Class)
The GFEVT1000‑A‑59E‑Series is a Size2# square‑body fast‑acting DC fuse manufactured by GFEFUSE. Specifically, it rates for 1000Vdc and covers current specifications ranging from 100A up to 800A. Compared with ordinary DC fuses, it provides 50kA interrupting capacity with L/R ≤5 ms and minimum breaking current of 3In. Furthermore, it adopts M10 threaded terminal together with built‑in blow‑out indicator. Therefore, it supports reliable visual fault detection for battery packs, energy‑storage equipment and DC relay backup protection.
Product Overview
Core Design Purpose
Designed for heavy‑duty 1000Vdc direct‑current circuits, this Size2# square‑body fuse focuses on short‑circuit backup protection for new‑energy power equipment. Besides, its high‑voltage rating allows designers to select smaller, cost‑effective conductors to raise overall system efficiency.
Fault‑Interrupt Performance
Under severe fault‑current conditions, this fuse can open up to ten times faster than conventional fuse links. As a result, it can effectively protect lithium‑ion batteries, power semiconductors and internal wiring against destructive short‑circuit damage. In addition, it delivers great ampacity within fixed Size2# outer dimensions.
Environmental & Mechanical Adaptability
This product carries strong resistance against current impulse and wide‑range ambient‑temperature tolerance. Moreover, high‑frequency vibration resistance reaches ≥20g acceleration. For cabinet‑mount energy‑storage devices or onboard battery systems, such mechanical performance brings stable long‑term operation. Meanwhile, the time‑current characteristic curve holds accuracy within ±15% current‑direction error.
Key Features & Benefits
Core Protection Advantages
In particular, this Size2# compact fuse fits medium‑power new‑energy cabinet projects. It includes these core advantages:
- ✅ Rated voltage 1000Vdc, compact Size2# square‑body mechanical structure
- ✅ Fast‑acting aR‑class protection; interrupt rating 50kA@1000Vdc (L/R ≤5 ms), minimum breaking‑current ≥3In
- ✅ M10 threaded flush‑end contact terminals, effective thread depth 10 mm; built‑in blow‑out visual fault indicator
- ✅ Complete current portfolio: 100A‑800A full‑range stock specifications
- ✅ Low watt‑loss property reduces extra heat generation inside power cabinets
- ✅ Superior mechanical shock & vibration resistance ≥20g acceleration
- ✅ Optimized for battery‑pack, ESS, DC relay and maintenance safety disconnector scenarios
- ✅ RoHS compliant; REACH documentation available upon buyer request
Main Electrical Ratings
Electrical Parameter Summary
In addition, all I²t test conditions run at 50kA @1000Vdc.
| Rated Voltage | 1000 Vdc |
| Rated Current Range | 100A‑800A (Size2#) |
| Operating Class | aR (semiconductor / battery backup protection) |
| Rated Breaking Capacity | 50 kA @1000 Vdc, L/R ≤5 ms |
| Minimum Breaking Current | ≥3.0 × In |
| Test I²t Condition | 50 kA @1000Vdc |
| Time‑Current Curve Tolerance | ±15% current‑direction error |
| Recommended Continuous Operating Current | ≤75% of nominal fuse rating |
| Terminal Type | M10 threaded flush‑end contact, thread depth 10 mm |
Complete Part‑Number Ratings Table
Model & Performance Data Sheet
Important note: Some higher‑current specifications have partial certification support only.
| Part No. | Fuse Amps | Breaking Capacity | A²s Melting @50kA/1000Vdc | A²t Clearing @50kA/1000Vdc | 100% Power Loss(W) | Approvals |
|---|---|---|---|---|---|---|
| GFEVT1000‑100A‑59E | 100A | 50kA | 1,320 | 8,680 | 75 | RoHS ●,REACH ● |
| GFEVT1000‑125A‑59E | 125A | 50kA | 1,880 | 12,400 | 80 | RoHS ●,REACH ● |
| GFEVT1000‑160A‑59E | 160A | 50kA | 2,690 | 17,710 | 85 | RoHS ●,REACH ● |
| GFEVT1000‑200A‑59E | 200A | 50kA | 3,840 | 25,300 | 90 | RoHS ●,REACH ● |
| GFEVT1000‑250A‑59E | 250A | 50kA | 5,490 | 36,150 | 98 | RoHS ●,REACH ● |
| GFEVT1000‑275A‑59E | 275A | 50kA | 7,900 | 52,170 | 105 | RoHS ●,REACH ● |
| GFEVT1000‑315A‑59E | 315A | 50kA | 10,900 | 72,850 | 113 | RoHS ●,REACH ● |
| GFEVT1000‑350A‑59E | 350A | 50kA | 13,900 | 91,650 | 120 | RoHS ●,REACH ● |
| GFEVT1000‑400A‑59E | 400A | 50kA | 19,450 | 131,600 | 128 | RoHS ●,REACH ● |
| GFEVT1000‑450A‑59E | 450A | 50kA | 30,950 | 192,700 | 135 | RoHS ○,REACH ○ |
| GFEVT1000‑500A‑59E | 500A | 50kA | 43,680 | 267,900 | 143 | RoHS ○,REACH ○ |
| GFEVT1000‑550A‑59E | 550A | 50kA | 56,420 | 347,800 | 150 | RoHS ○,REACH ○ |
| GFEVT1000‑630A‑59E | 630A | 50kA | 104,650 | 540,500 | 180 | RoHS ○,REACH ○ |
| GFEVT1000‑700A‑59E | 700A | 50kA | 145,930 | 739,350 | 188 | RoHS ○,REACH ○ |
| GFEVT1000‑800A‑59E | 800A | 50kA | 223,440 | 1,160,000 | 195 | RoHS ○,REACH ○ |
Mechanical Dimensions（Size2#, M10 threaded terminal）
Outline & Terminal Specification
Meanwhile, overall body dimension: 91±2.5 mm length ×59±1 mm width ×73±2 mm height. Terminal type: M10 threaded flush‑end contact, effective screw‑thread depth 10 mm. A built‑in blow‑out indicator offers visual alarm for fuse failure status.
Insert WebP‑format dimension drawing here.
Application Fields
Target Market & Use Cases
For instance, energy‑storage cabinet designers often select this series for main‑circuit short‑circuit backup protection. Main application scenarios:
- Typical New‑Energy Scenarios: Lithium‑ion Battery Pack over‑current & short‑circuit protection
- Energy‑Storage System（ESS / BESS）DC‑side backup protection
- Backup protection for DC relay & DC contactor
- DC maintenance safety disconnector application
- Industrial DC Equipment: High‑voltage DC power cabinet & industrial DC converter protection
Standards & Approvals
Compliance Certifications
Moreover, this fuse references international industry specifications: UL 248.1, UL 248.13; IEC 60269‑1, IEC 60269‑4. Most current ratings are RoHS compliant. Partial specifications support REACH document release upon formal customer request. As a result, time‑current characteristic accuracy keeps ±15% current‑direction error.
Operating Conditions & Derating Rules
Storage Environment
Product storage temperature: ‑40℃~+120℃; package storage temperature:‑40℃~+80℃. Humidity limits: RH≤70%@40℃, RH≤80%@30℃, RH≤90%@20℃.
Temperature Derating Guidance
Standard operating temperature ranges from ‑5℃ ~+40℃. Allowable working temperature covers ‑40℃ ~+85℃. However, users must apply temperature‑derating factor Kt when ambient temperature rises above 40℃. Below ‑5℃, low‑overload pre‑arcing time will extend slightly.
Altitude Derating Guidance
Normal installation altitude should not exceed 2000 m. For closed‑box cabinets operating above 2000 m while internal temperature stays above 40℃, derate rated‑current 2%‑5% per 1000 m elevation. When altitude ranges from 2000‑4500 m, air insulation strength drops by 12‑15% per 1000 m. Therefore, follow GB/T 16935.1 to adjust insulation clearance. Correction formula: Ka = 1‑(H‑2000)/100*0.5.
Continuous‑Current Restriction
As an important installation note: long‑term operating current must stay ≤75% × nominal In.
Insert three charts: temperature‑derating Kt curve, altitude‑derating Ka curve, forced‑air‑cooling Kv curve.
Installation & Conductor Sizing Requirement
Terminal Fastening
Use M10‑standard screws for terminal fastening. You need to guarantee stable low contact resistance during assembly.
Cable Selection
Besides, select copper conductor cross‑section strictly according to conductor‑sizing reference table inside datasheet.
Mounting Orientation
Horizontal, vertical and tilted installation are all supported. Nevertheless, avoid negative gravity‑vibration impact for spring‑contact‑related connection structures.
Safety Reminders
Do NOT replace fuse under load, unless the system is equipped with dedicated fuse disconnector switch. Reserve adequate insulation clearance between live parts and ground. In particular, high‑altitude sites need extra insulation safety margin for this Size2# fuse. Replace any mechanically damaged fuse immediately. During regular equipment maintenance, wipe dust and oxide layers from conductive contact surfaces.
Frequently Asked Questions
1: What is breaking‑capacity & time‑constant of GFEVT1000‑A‑59E series?
A: Rated breaking‑capacity 50kA @1000Vdc, time‑constant L/R ≤5 ms; minimum breaking‑current ≥3 times nominal rated current (3In).
2: What terminal specification for this fuse?
A: M10 threaded flush‑end contact terminal, effective screw‑thread depth 10 mm.
3: What applications is this fuse suitable for?
A: Lithium‑ion battery pack protection, energy‑storage system, DC relay backup, maintenance safety disconnector, industrial high‑voltage DC cabinets.
4: What is recommended long‑term continuous operating current?
A: Continuous working current shall not exceed 75% of fuse nominal ampere rating.
5: Which standards does GFEVT1000‑A‑59E comply with?
A: Reference UL248.1 / UL248.13, IEC60269‑1 / IEC60269‑4. RoHS compliant; we provide REACH declaration upon customer request.
6: Is derating required for closed‑cabinet high‑altitude deployment?
A: Yes. For closed cabinets with internal temperature >40℃ above 2000 m altitude, derate rated‑current 2%‑5% per 1000 m elevation. However, open‑air installation generally ignores altitude‑related derating.
Download Datasheet & Get Quotation
👉 Download Datasheet & Get Quotation｜Request Technical Support & Bulk Quotation
Form fields suggestion: Required rated current, System DC voltage, Cabinet ambient temperature, Working altitude, Application scenario, Order quantity.
