GFEVT500‑B‑43E Flange‑Bolt DC Fuse 500Vdc 50‑630A aR Size01
GFEVT500‑B‑43E square fast‑acting dc fuse,flange bolt‑terminal 500Vdc 50‑630A aR,‑B with /‑BN without indicator,for battery & energy‑storage,factory wholesale.
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GFEVT500‑B‑43E Series Size01* Square‑Body High‑Speed Fast‑Acting DC Fuse 500Vdc 50‑630A aR Class (Flange‑Bolt Terminal)
Product Overview
The GFEVT500-B-43E is a DC fuse designed as a square fast-acting flange bolt-terminal fuse for battery energy-storage protection. This fuse supports 500Vdc at 50-630A aR with optional indicator.
,GFEVT500‑B‑43E series is Size01* square‑body high‑speed fast‑acting DC fuse link with flange‑bolt terminal, designed for heavy‑duty direct‑current over‑current and short‑circuit protection. Rated 500Vdc, current range 50A‑630A, protection class aR. It achieves interrupting capacity of 50kA @500Vdc (L/R ≤ 2 ms), minimum breaking current＞3×In.
Two configuration options: suffix ‑B with blown‑fuse visual indicator, suffix ‑BN without indicator.
Important distinction：Electrical ratings are identical to GFEVT500‑A‑43E；the main difference is terminal construction：B‑43E uses flange‑bolt terminals；A‑43E adopts stud‑type terminals.
Manufactured by Dongguan GongFu Electronic. Complies with UL 248‑1/248‑13 and IEC 60269‑1/IEC 60269‑4, fully RoHS‑compliant, REACH documentation available on request.
Note：550A,630A belong to special‑order ratings, confirm stock & lead‑time with factory before placing orders.
Optimized for energy‑storage systems and large‑capacity battery packs, this fuse delivers ultra‑fast fault‑clearing performance, low watt‑loss, superior cycling capability, anti‑vibration capacity ≥20g acceleration. Well‑suited for OEM bulk sourcing for BESS, battery energy‑storage and DC relay backup‑protection projects.
Key Features & Benefits
- ✅ *500Vdc rated,50‑630A,aR fast‑acting class,Size01,flange‑bolt terminal**：Robust flange‑bolt connection for stable high‑current conduction, ideal for bus‑bar / cable lug installation inside power cabinets
- ✅ 50 kA high interrupting capacity @500Vdc(L/R ≤2ms), min breaking current＞3In：Quickly clear severe DC short‑circuit faults to avoid catastrophic damage to battery and power‑electronics components
- ✅ ‑B(with indicator) /‑BN(without indicator) two versions：Flexible selection for cabinet visual‑alarm requirement or cost‑sensitive projects
- ✅ Low power‑loss & superior cycling performance：Reduces steady‑state heat generation; extends service‑life under frequent charge‑discharge cycles of energy‑storage equipment
- ✅ Mechanical robustness,≥20g anti‑vibration performance：Maintain stable performance for cabinets and mobile new‑energy equipment under heavy shock & vibration
- ✅ Wide working temperature‑40℃~+85℃：Reliable operation for both cold‑climate and high‑temperature closed‑cabinet environments
- ✅ Global certification UL / IEC,RoHS compliant,REACH available：Simplify certification for worldwide export OEM projects
- ✅ Convenient flange‑bolt mounting：Easy assembly with cable lugs or bus‑bar connections for mass‑production cabinet manufacturing.
Complete Technical Specifications
| Item | Parameter |
|---|---|
| Series | GFEVT500‑B‑43E / GFEVT500‑BN‑43E |
| Rated Voltage | 500 Vdc |
| Rated Current Range | 50 A‑630 A |
| Protection Class | aR(Fast‑acting) |
| Body Size | Size 01* |
| Terminal Type | Flange‑bolt terminal |
| Interrupting Capacity | 50 kA @ 500Vdc (L/R ≤ 2 ms) |
| Minimum Breaking Current | ＞ 3 × In |
| Version Option | ‑B: with blown‑fuse indicator; ‑BN: without indicator |
| Standard Compliance | UL 248‑1, UL 248‑13; IEC 60269‑1, IEC 60269‑4 |
| Compliance | RoHS compliant; REACH declaration available on request |
| Vibration Resistance | ≥ 20 g acceleration |
| Operating Temperature | ‑40 ℃ ~ +85 ℃ |
| Recommended continuous operating current | ≤ 75 % of rated In |
| Storage Temperature | ‑40 ℃ ~ +120 ℃ |
Part‑Number List with I²t & Power‑Loss Data
*Marked models are special‑order items, consult factory for availability before purchase. Replace suffix‑B to‑BN for non‑indicator variant.
| Part‑No. | Rated Amps | Melting A²s | Clearing A²s | Power‑Loss(W)@1.0In |
|---|---|---|---|---|
| GFEVT500‑50B‑43E | 50 | 126 | 995 | 9 |
| GFEVT500‑63B‑43E | 63 | 212 | 1679 | 13 |
| GFEVT500‑80B‑43E | 80 | 345 | 2699 | 17 |
| GFEVT500‑100B‑43E | 100 | 640 | 5020 | 19 |
| GFEVT500‑125B‑43E | 125 | 1135 | 8940 | 23 |
| GFEVT500‑160B‑43E | 160 | 1920 | 15135 | 29 |
| GFEVT500‑200B‑43E | 200 | 3480 | 27383 | 36 |
| GFEVT500‑250B‑43E | 250 | 5770 | 45210 | 44 |
| GFEVT500‑315B‑43E | 315 | 9760 | 76920 | 55 |
| GFEVT500‑350B‑43E | 350 | 13840 | 108450 | 58 |
| GFEVT500‑400B‑43E | 400 | 19280 | 151350 | 65 |
| GFEVT500‑450B‑43E | 450 | 25900 | 203500 | 72 |
| GFEVT500‑500B‑43E | 500 | 33450 | 262500 | 80 |
| *GFEVT500‑550B‑43E | 550 | 45040 | 352800 | 85 |
| *GFEVT500‑630B‑43E | 630 | 65500 | 497500 | 97 |
Difference：GFEVT500‑B‑43E VS GFEVT500‑A‑43E
Internal link：👉 GFEVT500‑B‑43E Flange‑Bolt DC Fuse 500Vdc 50‑630A aR Size01
| Item | GFEVT500‑B‑43E | GFEVT500‑A‑43E |
|---|---|---|
| Electrical Performance | Identical：500Vdc,50‑630A,50kA interrupting,aR | Identical：500Vdc,50‑630A,50kA interrupting,aR |
| Terminal Structure | Flange‑bolt terminal (for cable lug / bus‑bar) | Stud‑type round pin terminal |
| Version | ‑B(with indicator) /‑BN(no indicator) | ‑A(with indicator) /‑AN(no indicator) |
| Best‑for | Lug / bus‑bar connection in power cabinet | Stud‑mount installation |
Working Environment & Derating Guidelines
- Recommended long‑term operating current shall not exceed 75 % of nominal rated‑In.
- Ambient‑temperature derating：Apply 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 no‑need derating.
- Forced‑air cooling can raise allowable operating‑current according to Kv correction curve.
Download complete datasheet for derating‑curve diagrams.
Typical Application Scenarios
‑ Energy‑storage system(BESS) battery‑pack short‑circuit & over‑current protection ‑ DC bus protection for energy‑storage cabinets with bus‑bar / cable‑lug wiring ‑ Backup protection for DC contactor / DC relay ‑ New‑energy power conversion equipment ‑ Industrial DC power‑supply units ‑ OEM power‑electronics assembly projects requiring flange‑bolt lug connection
H2：Frequently Asked Questions
1：What is difference between suffix‑B and‑BN for GFEVT500‑B‑43E?
‑B = with blown‑fuse visual indicator；‑BN = without indicator. Electrical and mechanical performance are exactly same.
2：What is main difference between GFEVT500‑B‑43E and GFEVT500‑A‑43E?
Electrical ratings are identical；B‑43E uses flange‑bolt terminals for cable‑lug / bus‑bar；A‑43E uses stud‑pin terminals.
3：Can GFEVT500‑B‑43E be used for battery‑ESS short‑circuit protection?
Yes, DC‑optimized design with 50kA high interrupting‑capacity for battery‑energy‑storage short‑circuit fault protection.
4：What is recommended continuous operating current?
We recommend running no more than 75 % of nominal rated‑In. Additional derating required for high‑temperature or high‑altitude closed‑cabinet conditions.
5：Are 550A /630A ready‑to‑ship?
These two ratings are special‑order variants. Please consult sales for stock status and lead‑time.
6：Can you offer datasheet, RoHS / REACH documents and bulk quotation?
We are original manufacturer. Submit inquiry for datasheet, MOQ, unit price and supporting compliance documents.
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.
