Eaton TPN-25 Telecommunication Fuse - 100 kAIC
Part Number: TPN-25
Quick Summary
The Eaton TPN-25 telecommunication fuse provides fast-acting overcurrent protection for telecom and data systems. Engineers often struggle with protecting sensitive electronics in compact enclosures without sacrificing service continuity. Key ratings like 100 kAIC interrupt capability and a 170 Vdc rating enable reliable protection, while the data sheet notes ferrule-end construction for secure, vibration-resistant connections. This combination supports durable telecom protection in control panels and industrial equipment, while the ferrule-end design and current-limiting action help reduce arc energy and maintenance costs. For procurement teams, the 25 A rating aligns with common telecom power architectures, and the standard packaging facilitates replacements in field deployments.
Product Information
Extended Description
TPN-25 Eaton: Eaton Bussmann series TPN telecommunication fuse, 170 Vdc, 25 A, 100 kAIC, Non Indicating, Current-limiting, Ferrule end X ferrule end, Silver-plated terminal
Product Name
Eaton Bussmann series TPN telecommunication fuse
Catalog Number
TPN-25
UPC
051712196772
Product Length/Depth
0.56 in
Product Height
2 in
Product Width
0.56 in
Product Weight
0.5 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
25 A
Interrupt rating
100 kAIC
Voltage rating
170 Vdc
Packaging type
Standard
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
TPN-25~TELPOWER FUSE
TPN-25~TELPOWER FUSE
Bussmann series Fuseology
Eaton Specification Sheet - TPN-25
Feature: The TPN-25 delivers 25 A at 170 Vdc with a 100 kAIC interrupt rating, providing robust protection for telecom power rails and data equipment. Business impact: This protects critical power elements from high-energy faults, reducing unscheduled downtime and equipment damage in data centers and field installations. Application: Ideal for compact telecom racks, control panels, and edge devices where reliable protection must fit within limited space. Feature: Ferrule-end x ferrule-end connections with silver-plated terminals deliver secure, low-resistance terminations. Business impact: Improved contact reliability under vibration and humidity translates to longer service life and fewer field failures. Application: Works with standard ferrule-based fuse blocks in telecom enclosures and OEM panel assemblies. Feature: Current-limiting action rapidly clamps fault currents to minimize energy release. Business impact: Lower peak energy reduces arc energy, protecting downstream power supplies and sensitive electronics. Application: Particularly beneficial for DC power rails, network equipment, and other telecom assets in harsh environments. Feature: Compact form factor spans 0.56 in by 0.56 in by 2 in, enabling dense cabinet layouts. Business impact: Higher packing density lowers capital expenditure and simplifies logistics during installation and maintenance. Application: Suitable for small enclosures, modular racks, and retrofit projects that demand reliable protection without bulk. Feature: Non-indicating fuse indicator minimizes visual clutter in crowded electrical bays. Business impact: Reduces inspection time and inventory complexity while dependable replacement workflows support uptime. Application: Effective in telecom centers, industrial facilities, and data centers where quick swaps and consistent protection are critical. Engineered components and standard packaging further align with procurement and maintenance workflows.
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FAQs
The TPN-25 uses ferrule-end terminals compatible with standard ferrule-based fuse blocks common in telecom enclosures. Its dimensions (0.56 in W, 0.56 in D, 2 in H) fit dense cabinets, control panels, and compact racks. For securing torque and wiring practices, consult Eaton's installation guidelines and ensure conductor compatibility with ferrule tooling for reliable, repeatable terminations.
A 100 kAIC interrupt rating indicates the fuse can interrupt very high fault currents without sustaining damage, protecting upstream transformers, power supplies, and downstream electronics. The current-limiting design further reduces peak fault energy, lowering arc energy and thermal stress on adjacent components, which improves equipment reliability in telecom and data-center power rails.
Yes. The TPN-25 is designed for telecom and data-center environments, offering 25 A at 170 Vdc with fast response to overloads and a high interrupt rating. Its ferrule-end construction simplifies replacement in existing blocks, while the compact footprint enables dense rack configurations and modular deployments in control panels and edge devices.
The provided data does not list specific certification marks. Verify regulatory compliance in Eaton’s official datasheets or Bussmann catalogs, which typically include CE, UL, and other region-specific marks. Always cross-check with your regional regulatory requirements and your QA team before installation in telecom and DC power systems.
Field installation is streamlined by ferrule-end terminations and standard packaging, reducing wiring time and labor costs. The non-indicating design lowers visual maintenance requirements, though periodic electrical tests remain essential. Overall, the compact form factor supports higher cabinet density, delivering lower total cost of ownership in telecom and industrial facilities.