Eaton TPN-90 Telecommunication Fuse - 100 kAIC, 170 Vdc
Part Number: TPN-90
Quick Summary
The Eaton TPN-90 telecommunication fuse protects telecom power systems by interrupting faults quickly. A common pain point is nuisance tripping or slow fault isolation that drives downtime and service delays. While the data shows no explicit CE, SIL, or IP certifications, engineers typically verify these ratings in the official Eaton datasheets to meet project requirements. This current-limiting, non-indicating device delivers reliable electrical protection in telecom racks and distribution panels, with a compact form factor that supports easy integration into existing cabinets. By combining high fault-current capability with DC voltage suitability, it enables safer, faster fault clearance and a reduction in unplanned outages for telecom networks and data-center infrastructure.
Product Information
Extended Description
TPN-90 Eaton: Eaton Bussmann series TPN telecommunication fuse, 170 Vdc, 90 A, 100 kAIC, Non Indicating, Current-limiting, Silver-plated terminal
Product Name
Eaton Bussmann series TPN telecommunication fuse
Catalog Number
TPN-90
UPC
051712196963
Product Length/Depth
1.2 in
Product Height
5.75 in
Product Width
1.2 in
Product Weight
0.32 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
90 A
Interrupt rating
100 kAIC
Voltage rating
170 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 - TPN-90
Feature: Current-limiting performance with a 100 kAIC interrupt rating. Business impact: Limits energy during a fault, reducing downstream damage and simplifying upstream protection coordination. Application: Ideal for DC telecom power paths and distribution panels where fast fault clearance is essential. Feature: 170 Vdc voltage rating. Business impact: Matches typical telecom DC systems and reduces nuisance tripping due to over-voltage events. Application: Data centers, switching equipment, and remote telecom cabinets that rely on stable DC power. Feature: 90 A amperage rating. Business impact: Aligns with common telecom feeder currents, enabling precise protection without nuisance outages. Application: Rack-mount telecom power rails and DC bus segments. Feature: Non-indicating design. Business impact: Simplifies panel aesthetics and lowers maintenance by avoiding extra indicators in crowded enclosures. Application: Standard fuse holders in telecom enclosures. Feature: Silver-plated terminals. Business impact: Enhances connection reliability and corrosion resistance for long-term service life. Application: Harsh telecom environments and outdoor installations. Feature: Standard packaging and compact dimensions (1.2 in x 1.2 in x 5.75 in). Business impact: Facilitates retrofit and retrofits with minimal space impact. Application: Replacement in existing Bussmann catalogs and compatible housings. Industry context: These attributes support efficient installation, predictable coordination with upstream protections, and measurable uptime improvements in telecommunications and data-center power ecosystems.
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FAQs
The TPN-90 measures 1.2 in (length) by 1.2 in (width) with a height of 5.75 in and standard packaging, making it compatible with common telecom fuse holders and enclosure rails. Verify housing clearance and existing Bussmann catalog compatibility before replacement. The 90 A current rating suits typical DC telecom feeders, while the 170 Vdc rating aligns with many telecom power architectures.
TPN-90 is rated for 90 A continuous current with a 170 Vdc voltage rating and a 100 kAIC interrupt rating. These specifications support fast fault interruption in DC telecom power paths, protecting upstream transformers, DC buses, and distribution panels while minimizing fault energy transmitted downstream.
This fuse is well-suited for telecom racks, DC power distribution panels, and data-center DC bus segments where a current-limiting, non-indicating fuse is desirable. Its high interrupt rating and compact footprint help protect switches, line cards, and power rails, enabling reliable operation in both indoor cabinets and outdoor telecom enclosures.
The provided data does not specify SIL, CE, or IP certifications for the TPN-90. For regulatory compliance and project-specific requirements, consult Eaton’s official datasheet and product page to confirm certifications relevant to your installation locale and industry standards.
The TPN-90 delivers predictable protection with a high interrupt rating and fast fault clearance, reducing fault energy and downstream damage. The non-indicating design simplifies panel layouts, while silver-plated terminals enhance connection reliability. Together, these traits minimize downtime, extend service intervals, and improve overall equipment availability in telecom and data-center environments.