GFEVT500‑A‑74E Square DC Fuse 500Vdc 500‑1800A aR Size3#
GFEVT500‑A‑74E fast‑acting square‑body DC fuse,500Vdc 500‑1800A aR,50kA interrupting,flush‑end contact for battery & energy‑storage,factory wholesale.
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GFEVT500‑A‑74E Series Size3# Square‑Body High‑Speed Fast‑Acting DC Fuse 500Vdc 500‑1800A aR Class
Product Overview
The GFEVT500-A-74E is a DC fuse designed as a fast-acting square-body aR fuse for battery energy-storage protection. This fuse supports 500Vdc at 500-1800A with 50kA interrupting and flush-end contact.
,The GFEVT500‑A‑74E series is Size3# square‑body high‑speed fast‑acting DC fuse link with flush‑end contact, specially engineered for high‑current direct‑current overcurrent & short‑circuit protection. Rated 500Vdc, current range 500A‑1800A, protection class aR. It reaches max interrupting capacity 50kA@500Vdc, minimum breaking current ≥5In, time constant ≤5 ms.
Manufactured by Dongguan GongFu Electronic, this fuse complies with UL 248‑1/248‑13 and IEC 60269‑1/IEC 60269‑4 standards, fully RoHS‑compliant, REACH documentation available upon request.
Note：1500A,1600A,1800A are special‑order ratings; confirm stock & lead‑time with factory before placing orders.
Optimized for large‑current energy‑storage cabinets and heavy‑duty battery‑pack systems, it delivers ultra‑fast fault‑clearing performance, low watt‑loss, outstanding cycling capability, anti‑vibration capacity ≥20g acceleration. Suitable for OEM bulk sourcing for BESS, battery energy‑storage and DC relay backup‑protection projects.
Key Features & Benefits
- ✅ 500Vdc rated,500‑1800A,aR fast‑acting class,Size3# flush‑end contact：High‑current DC‑optimized fuse for short‑circuit & over‑current protection for large‑capacity batteries and power semiconductors
- ✅ 50 kA high interrupting capacity, min breaking current≥5In,time constant ≤5ms：Quickly clear severe DC short‑circuit faults to avoid catastrophic damage to energy‑storage equipment
- ✅ Flush‑end contact design：Stable large‑current conduction, low contact thermal rise for heavy‑duty cabinet installation
- ✅ Low power‑loss & superior cycling performance：Reduce steady‑state heat generation, extend service‑life under frequent charge‑discharge cycles of energy‑storage systems
- ✅ Robust mechanical property,≥20g vibration resistance：Maintain stable performance for cabinets and mobile new‑energy equipment with heavy shock & vibration
- ✅ Wide working temperature‑40℃~+85℃：Reliable operation for cold‑climate and high‑temperature closed‑cabinet environments
- ✅ UL / IEC certified,RoHS compliant,REACH available：Simplify global export project certification
- ✅ Bolt‑on square‑body mounting(M12 thread)：Convenient cabinet assembly, suitable for mass OEM production.
Complete Technical Specifications
| Item | Parameter |
|---|---|
| Series | GFEVT500‑A‑74E |
| Rated Voltage | 500 Vdc |
| Rated Current Range | 500 A‑1800 A |
| Protection Class | aR(Fast‑acting) |
| Body Size | Size 3# |
| Contact Type | Flush‑end contact |
| Interrupting Capacity | 50 kA @ 500Vdc |
| Minimum Breaking Current | ≥ 5 × In |
| Time Constant | ≤ 5 ms |
| Standard Compliance | UL 248‑1, UL 248‑13; IEC 60269‑1, IEC 60269‑4 |
| Compliance | RoHS compliant; REACH declaration on request |
| Vibration Resistance | ≥ 20 g acceleration |
| Operating Temperature | ‑40 ℃ ~ +85 ℃ |
| Recommended continuous operating current | ≤ 75 % of rated In |
| Storage Temperature | ‑40 ℃ ~ +120 ℃ |
| Mounting Thread | M12 |
Part‑Number List with I²t & Power‑Loss Data
*Marked models require pre‑communication with factory for availability
| Part‑No. | Rated Amps | Melting A²s | Clearing A²s | Power‑Loss(W)@1.0In |
|---|---|---|---|---|
| GFEVT500‑500A‑74E | 500 | 12290 | 85500 | 95 |
| GFEVT500‑550A‑74E | 550 | 16900 | 121500 | 105 |
| GFEVT500‑630A‑74E | 630 | 26970 | 189000 | 115 |
| GFEVT500‑700A‑74E | 700 | 38715 | 270000 | 120 |
| GFEVT500‑800A‑74E | 800 | 60450 | 418500 | 130 |
| GFEVT500‑900A‑74E | 900 | 87000 | 603000 | 138 |
| GFEVT500‑1000A‑74E | 1000 | 121800 | 850500 | 145 |
| GFEVT500‑1100A‑74E | 1100 | 165300 | 1170000 | 165 |
| GFEVT500‑1250A‑74E | 1250 | 252300 | 1755000 | 180 |
| GFEVT500‑1400A‑74E | 1400 | 322500 | 2205000 | 190 |
| *GFEVT500‑1500A‑74E | 1500 | 400200 | 2790000 | 200 |
| *GFEVT500‑1600A‑74E | 1600 | 505600 | 3510000 | 230 |
| *GFEVT500‑1800A‑74E | 1800 | 765600 | 4925000 | 260 |
Note: *1500A /1600A /1800A belong to special‑order specifications. Confirm lead‑time and stock status before purchase.
Working Environment & Derating Guidelines
- Recommended long‑term operating current shall not exceed 75 % of nominal rated‑In.
- Ambient‑temperature derating: Derate current with correction‑factor Kt when ambient temperature exceeds 40℃. Below‑5℃, pre‑arcing time will extend slightly.
- Altitude derating: For closed‑cabinet installation within 2000‑4500 m, derate rated‑current by 2‑5 % per 1000 m altitude rise; open‑air installation generally requires no derating.
- Forced‑air cooling can increase allowable operating‑current according to Kv correction curve.
Download complete datasheet for derating‑curve diagrams.
Typical Application Scenarios
‑ Large‑capacity energy‑storage system(BESS) battery‑pack short‑circuit & over‑current protection ‑ DC bus protection for high‑current energy‑storage cabinets ‑ Backup protection for high‑current DC contactors / DC relays ‑ New‑energy power conversion equipment ‑ Heavy‑duty industrial DC power‑supply units ‑ OEM large‑current power‑electronics assembly projects
Frequently Asked Questions
1：What is the contact type for GFEVT500‑A‑74E fuse?
It adopts flush‑end contact structure, optimized for stable high‑current conduction in power cabinets.
2：Is GFEVT500‑A‑74E suitable for large‑capacity battery‑ESS short‑circuit protection?
Yes. This series is DC‑optimized, 50kA high interrupting‑capacity, min breaking current ≥5In for heavy‑duty battery‑energy‑storage fault protection.
3：What is the suggested continuous operating current?
We recommend running no more than 75 % of nominal rated‑In. Additional derating is needed for high‑temperature or high‑altitude closed‑cabinet conditions.
4：Are 1500A /1600A /1800A in‑stock for direct ordering?
These three high‑current ratings are special‑order variants, please consult our sales team for stock, lead‑time and MOQ information.
5：Does this fuse satisfy UL / IEC standards? Can you offer RoHS & REACH files?
It complies with UL248‑1/‑13 and IEC60269‑1/‑4; RoHS‑compliant. REACH declaration document can be provided upon customer request.
6：Do you provide bulk wholesale and datasheet download?
We are original manufacturer. Please submit your inquiry to get datasheet, quotation and OEM support.
Download Datasheet & Request Wholesale Quotation
CTA Buttons：Download PDF Datasheet | Request Bulk Quotation Internal links：DC‑fuse category page, contact‑us page, cross‑link to GFEVT500‑A‑43E product page.
GFEVT500‑A‑74E Square DC Fuse 500Vdc 500‑1800A aR Size3#
