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Eaton Bussmann BK1S500400R Fast-Acting Glass Fuse

This is a fast-acting fuse rated for 250 VAC and 0.4 Amps. It features a cylindrical package with dimensions of 5 x 20 mm and is designed for mounting in a holder. The fuse has glass tube construction with silver-plated and nickel-plated endcaps, conforming to IEC 60127-2 standards. It provides reliable overcurrent protection for electronic and electrical circuits, with various agency approvals including UL, CSA, VDE, SEMKO, BSI, and IMQ. The fuse is suitable for modular, low-voltage applications requiring fast response times and high interrupting ratings.

Authorized Distributors
Source:Newark
Part No:BK1-S500-400-R
Stock:1700
Inv Date:06-12-2026
Price: Unit price: $1.17
Buy/RFQ:
Source:DigiKey
Part No:BK1-S500-400-R
Stock:794
Inv Date:06-12-2026
Price: Unit price: $1.25
Buy/RFQ:
Source:DigiKey
Part No:BK1/S500-400-R
Stock:794
Inv Date:06-12-2026
Price: Unit price: $1.25
Buy/RFQ:
Part No:BK1/S500-400-R
Stock:317
Inv Date:06-13-2026
Price: Unit price: $1.04
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Part No:BK1/S500-400-R
Stock:0
Inv Date:06-12-2026
Price: Unit price: $1.13
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Part No:BK1/S500-400-R
Stock:10000
Inv Date:06-12-2026
Price: Unit price: $0.7845
Buy/RFQ:
Part No:BK1/S500-400-R
Stock:10000
Inv Date:06-12-2026
Price: Unit price: $0.7845
Buy/RFQ:

Eaton Bussmann BK1S500400R Fast-Acting Glass Fuse Specifications:

  • Physical size: 5 x 20 mm
  • Rated Voltage: 250 VAC
  • Rated Current: 0.4 Amps
  • Construction: Glass tube with silver-plated (32-125mA) and nickel-plated (160mA-10A) endcaps
  • Standard: IEC 60127-2 (160mA-10A)
  • Dimensions: Length 20mm, Diameter 5mm
  • Response Time: Fast-acting, with melting points specified for different ratings
  • Agency Approvals: UL, CSA, VDE, SEMKO, BSI, IMQ, CCC
  • Lead Type: Option for axial leads with 19.05mm wire length available
  • Interrupting Rating: Up to 35A depending on part number
  • Temperature Resistance: Suitable for typical circuit operating conditions
  • Packaging: BK (carton), BK1i (poly bag), TR2 (reel, 19.05mm lead wire)

Buy the Buy Fast-Acting Fuse Part Number BK1S500400R Online

Order the Bussmann BK1S500400R fast-acting fuse online today for your electronic, industrial, or device protection needs. This 5x20mm glass tube fuse features reliable performance at 250VAC and 0.4A, designed to ensure safety and durability. Perfect for circuit protection in low-voltage applications with fast response times, high interrupting ratings, and certified approvals including UL, CSA, VDE, and BSI. Purchase this dependable fuse easily online and enhance your safety and circuit reliability with minimal effort.

Get Bussmann BK1S500400R today—built for reliable circuit protection with fast response and high interrupting capacity.

Frequently Asked Questions

Where can I buy Eaton Bussmann BK1S500400R?

You can click on the BUY or RFQ button to purchase BK1S500400R from an authorized Eaton Bussmann distributor.

How do I troubleshoot issues or seek technical support for part BK1S500400R?

You can download the BK1S500400R datasheet or visit the Eaton Bussmann website for support.

Who is the manufacturer of BK1S500400R?

Eaton Bussmann

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