Eaton 70J-3-1/2A Telecommunication Fuse - 1 kAIC
Part Number: 70J-3-1/2A
Quick Summary
The Eaton 70J-3-1/2A telecommunication fuse protects telecom circuits by interrupting fault currents in equipment and network cabinets. Engineers often struggle to find fuses that fit small form factors yet deliver reliable interrupt performance in 125 Vac / 300 Vdc systems. This part is CE marked, aligning with Bussmann series safety standards to streamline regulatory compliance for EU deployments. Designed for ferrule-end wiring and standard packaging, it integrates smoothly with Bussmann fuseholders and reduces field installation time, delivering cost savings over time. secondary keywords include ferrule end fuses and telecom protection for data center environments to reinforce business value.
Product Information
Extended Description
70J-3-1/2A Eaton: Eaton Bussmann series 70 Series telecommunication fuse, Color code black/white, 125 Vac, 300 Vdc, 3-1/2 A, 1 kAIC at 300 Vdc, Non Indicating, Ferrule end X ferrule end
Product Name
Eaton Bussmann series 70 Series telecommunication fuse
Catalog Number
70J-3-1/2A
UPC
051712736176
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
3-1/2A
Interrupt rating
1 kAIC at 300 Vdc
Voltage rating
125 Vac, 300 Vdc
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
Color code black/white
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - 70J-3-1/2A
Feature → Business Impact → Application: The 70J-3-1/2A rating supports protection for telecom power rails up to 125 Vac and 300 Vdc, enabling precise fault interruption without exceeding conductor limits; this reduces downtime and protects critical equipment in data centers and network enclosures. Application: telecom cabinets, switching gear, and network interface devices where compact protection is required. Feature → Business Impact → Application: A 1 kAIC interrupt rating at 300 Vdc provides robust fault-clearing capabilities, minimizing arc risk and hardware damage, which translates to lower maintenance costs and extended equipment life in high-density telecom racks. Application: central office and field-deployed telecom nodes. Feature → Business Impact → Application: Ferrule end x ferrule end connections offer reliable, field-friendly terminations that speed up installation and improve contact integrity in panel-mounted fuses. Application: modular fuse holders and standard Bussmann frames. Feature → Business Impact → Application: Non-indicating fuse with a clear black/white color code supports quick identification in crowded panels, reducing misplacing risk and accelerating diagnostics during service windows. Application: mixed-signal telecom infrastructure with color-coded labeling needs. Feature → Business Impact → Application: CE compliance and Bussmann lineage provide proven reliability, ease of sourcing, and compatibility with a wide ecosystem of Bussmann accessories and holders. Application: EU-based deployments and retrofit projects across telecom networks.
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FAQs
The 70J-3-1/2A is designed for telecom equipment and network infrastructure that uses ferrule-end terminations. It fits standard Bussmann 70 Series fuseholders and panel boards, enabling straightforward replacement in telecom cabinets while maintaining compliance with the 125 Vac / 300 Vdc power rails. Always verify connector sizing and holder compatibility prior to field retrofit.
Key ratings include an amperage of 3-1/2 A, voltage ratings of 125 Vac and 300 Vdc, and an interrupt rating of 1 kAIC at 300 Vdc. These specs define the fault-clearing capability and safe operating limits, ensuring protection for telecom circuits against short circuits while allowing normal operation within these limits.
Yes. The fuse is rated for 125 Vac and 300 Vdc, making it suitable for mixed-supply telecom equipment. This dual capability supports common telecom and data-center power architectures, simplifying procurement and inventory for mixed-system deployments.
Install with ferrule-end terminations using compatible Bussmann fuseholders. The compact form factor (1.63 in length, 0.42 in width, 2.5 in height) facilitates tight panel layouts, while the color code (black/white) aids quick field identification. Non-indicating design means you may need external diagnostics for fuse status.
The fuse is CE marked, indicating compliance with European safety standards. This simplifies EU deployments and regulatory approvals for telecom equipment. As always, verify your local regulatory requirements and ensure your assembly and labeling reflect CE markings where applicable.