Eaton TPN-400 Telecommunication Fuse - 100 kAIC Rated
Part Number: TPN-400
Quick Summary
Eaton TPN-400 telecommunication fuse is a high-current, current-limiting device designed for DC telecom power architectures. It protects sensitive distribution gear by rapidly interrupting fault currents while remaining non-indicating until a fault occurs. In telecom racks and DC power systems, downtime and arc-flash risk are costly; reliable fast-acting protection is essential. Critical design attributes include a 170 Vdc rating, 400 A amperage, and a 100 kAIC interrupt rating, with silver-plated terminals for corrosion resistance. While the data shows Not Applicable for compliance and warranty, engineers should verify certifications relevant to their region and application. This fuse complements Eaton Bussmann series protection while offering durability, installation simplicity, and predictable operating behavior in high-energy environments.
Product Information
Extended Description
TPN-400 Eaton: Eaton Bussmann series TPN telecommunication fuse, 170 Vdc, 400 A, 100 kAIC, Non Indicating, Current-limiting, Silver-plated terminal
Product Name
Eaton Bussmann series TPN telecommunication fuse
Catalog Number
TPN-400
UPC
051712196857
Product Length/Depth
2 in
Product Height
8.6 in
Product Width
2 in
Product Weight
1.93 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
400 A
Interrupt rating
100 kAIC
Voltage rating
170 Vdc
Packaging type
Standard
Fuse indicator
Non-indicating
TPN-400~TELPOWER FUSE
TPN-400~TELPOWER FUSE
Bussmann series Fuseology
Eaton Specification Sheet - TPN-400
Feature: High current capability and fast interrupt action → Business Impact: Minimizes energy let-through and thermal stress on sensitive telecom gear → Application: DC power distribution in data centers and network cabinets. Feature: Current-limiting design enhances fault isolation, reducing conductor damage and downstream trips → Application: Critical telecom rack protection with predictable clearance. Feature: Silver-plated terminals improve corrosion resistance and contact reliability in challenging environments → Business Impact: Longer service life and reduced maintenance in outdoor or industrial telecom installations. Feature: Compact footprint with standard packaging → Application: Easy integration into existing fuse blocks and Bussmann series assemblies. Feature: Non-indicating indicator simplifies panel design and reduces false alarms in dense installations → Business Impact: Cleaner status indication management and faster fault diagnosis. Feature: 170 Vdc rating and 400 A rating for telecom DC power systems → Application: Suitable for high-current DC distribution in telecom and data-center networks. Industry context: Aligns with common telecom protection practices while supporting energy-efficient fault clearance and system uptime.
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FAQs
Install the TPN-400 in a standard fuse holder compatible with Bussmann series devices. Ensure correct orientation in the rack or panel, tighten terminal connections to spec, and verify the 2 x 2 x 8.6 inch footprint fits your chassis. Use recommended torque values and confirm the 170 Vdc rating matches your DC bus. After mounting, perform a circuit continuity check and verify that the non-indicating fuse is wired into the intended protection path to avoid nuisance trips.
The TPN-400 provides a 400 A amperage rating, a 170 Vdc voltage rating, and a 100 kAIC interrupt rating. It is a current-limiting, non-indicating device with silver-plated terminals for corrosion resistance. These ratings make it suitable for high-energy DC telecom protection while helping to minimize fault energy let-through and downstream equipment stress.
Yes. With a 170 Vdc rating, 400 A capacity, and 100 kAIC interrupt rating, the TPN-400 is engineered for DC telecom power distribution, rack protections, and network equipment protection. Its current-limiting action helps control fault energy, which is critical for minimizing damage to power supplies, DC buses, and connected components in telecom infrastructures.
The provided data indicates Not Applicable for Compliance, Warranty, and related certifications. For mission-critical telecom deployments, verify the latest Eaton datasheet and regional regulatory requirements (CE, UL, or others) with the supplier to ensure alignment with your specific installation and market standards before field deployment.
The TPN-400’s high-current, fast fault-clearing design reduces fault energy and downtime, which translates to higher system availability and lower service interruptions in telecom DC power systems. Its non-indicating design simplifies panel layouts, while silver-plated terminals deliver long-term reliability in challenging environments, contributing to lower maintenance costs and a favorable total cost of ownership.