Eaton BK/70K-1/4A Telecommunication Fuse - 1 kAIC at 300 Vdc
Part Number: BK/70K-1/4A
Quick Summary
The Eaton BK/70K-1/4A Telecommunication fuse provides compact overcurrent protection for telecom lines and network gear. This helps prevent nuisance outages from minor faults, reducing downtime and maintenance costs. It carries CE marking and aligns with common protection standards, offering 1 kAIC interrupt rating at 300 Vdc. The small 1.63 in length and 0.42 in width enables easy retrofit into standard telecom enclosures. Non-indicating operation simplifies panel layout while preserving reliability, and the device supports 125 Vac / 300 Vdc circuits in both North American and European environments. This combination delivers dependable protection with straightforward procurement for scalable telecom protection programs.
Product Information
Extended Description
BK/70K-1/4A Eaton: Eaton Bussmann series 70 Series telecommunication fuse, 125 Vac, 300 Vdc, 0.25 A, 1 kAIC at 300 Vdc, Non Indicating
Product Name
Eaton Bussmann series 70 Series telecommunication fuse
Catalog Number
BK/70K-1/4A
UPC
051712735964
Product Length/Depth
1.63 in
Product Height
2.5 in
Product Width
0.42 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
0.25 A
Interrupt rating
1 kAIC at 300 Vdc
Response time
0 to 300 sec at 160%
Voltage rating
125 Vac, 300 Vdc
Packaging type
Standard
Fuse indicator
Non-indicating
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - BK/70K-1/4A
Feature: Amperage and interrupt rating of 0.25 A with 1 kAIC at 300 Vdc. Business Impact: Protects sensitive telecom equipment from fault currents while enabling fast fault isolation, reducing device damage and downtime. Application: Suitable for data centers, network racks, and remote telecom nodes requiring reliable protection without over-specified fusing. Feature: Voltage rating of 125 Vac / 300 Vdc. Business Impact: Enables cross-application compatibility across legacy and modern telecom circuits, lowering design complexity and increasing install flexibility. Application: Data communications gear, enterprise routers, and field-deployed network hardware.Feature: Compact form factor (1.63 in L × 0.42 in W × 2.5 in H) with standard packaging. Business Impact: Streamlines replacement and stocking, reduces panel footprint, and simplifies field retrofit. Application: Retrofit into existing Bussmann 70 Series panels and telecom enclosures with minimal clearance impact.Feature: Non-indicating fuse indicator. Business Impact: Reduces panel clutter and eliminates unnecessary indicators in crowded configurations, lowering upfront costs and maintenance simplicity. Application: Enclosures in data centers and telecom closets where visual status indicators are not required or monitored separately.Feature: CE Marked compliance. Business Impact: Supports regulatory acceptance and market access in Europe and other CE-adopting regions. Application: Global telecom deployments and mixed-region installations where regulatory conformity matters.Feature: Compatibility with Bussmann 70 Series. Business Impact: Facilitates unified sourcing and spare parts management across a family of protection devices, improving procurement efficiency. Application: Large-scale system integrators and maintenance teams stocking Bussmann components.
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FAQs
BK/70K-1/4A is designed for telecom circuits and network equipment. It fits standard Bussmann 70 Series fuse blocks and enclosures with a compact footprint of 1.63 in by 0.42 in. Use in 125 Vac or 300 Vdc applications where a 0.25 A protection level and a 1 kAIC interrupt rating are appropriate. Pair with appropriate fuse holders and protective enclosures for reliable field deployment.
Key specifications include a 0.25 A amperage rating, 125 Vac / 300 Vdc voltage rating, and a 1 kAIC interrupt rating at 300 Vdc. The response time ranges from 0 to 300 seconds at 160% overcurrent, and the fuse is non-indicating. These ratings support protection for telecom power feeds and data paths in both North American and CE markets.
Yes, the BK/70K-1/4A is CE marked, indicating conformity with applicable European directives for electrical protection devices. While voltage considerations must align with system design, the CE marking supports regulatory acceptance in CE regions and enables broader deployment alongside other Bussmann 70 Series products.
Consider the non-indicating nature of the fuse, which means status is not shown on the device itself. Plan to use an external monitoring or indication strategy if status visibility is required. The fuse’s compact dimensions enable easy mounting in standard telecom enclosures, and its 1/4 A rating should match the system’s protection needs without triggering nuisance trips in normal operation.
The fuse offers reliable overcurrent protection with a proven 1 kAIC rating, helping avoid costly equipment damage and downtime. Its CE conformity and Bussmann 70 Series compatibility streamline procurement and stocking, reducing spare parts inventory. The compact form factor simplifies installations, potentially shortening maintenance windows and accelerating serviceability across multiple sites.