TPS-40V Equivalent & Substitute Parts Reference

Part Overview

The TPS-40V is a 40A 170 VDC fuse cartridge manufactured by Eaton - Bussmann Electrical Division, part of the Telpower® TPS series. This through-hole mounted radial bend cylinder fuse is designed for telecom applications requiring reliable DC circuit protection at high voltage levels. The component is currently active in production with 721 units in stock. Equivalent substitute parts are necessary to ensure supply chain continuity, maintain inventory flexibility, and provide alternative sourcing options when the primary manufacturer experiences lead time constraints or allocation limitations.

Substiute Parts

TPS-40V

Eaton - Bussmann Electrical DivisionIn Stock: 750TPS-40V Datasheet

Current PartRFQ

0TLS040.TXLS

Littelfuse Inc.In Stock: 9200TLS040.TXLS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS-40V is determined by strict equivalence across the following critical parameters:

• Current Rating: 40A (exact match required)
• Voltage Rating (DC): 170 VDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial Bend Cylinder (exact match required)
• Breaking Capacity @ Rated Voltage: 100kA (exact match required)

The substitute part 0TLS040.TXLS from Littelfuse Inc. meets all critical electrical and mechanical parameters. Minor dimensional variations within manufacturing tolerances (0.562" Dia x 0.944" L versus 0.563" Dia x 0.874" H) are acceptable for through-hole cartridge fuse applications where radial bend cylinder geometry is maintained. Both parts maintain equivalent RoHS compliance status and hold appropriate regulatory approvals for telecom applications.

Parameter Comparison

Engineering Selection Recommendations

Both the TPS-40V and 0TLS040.TXLS are active production components with equivalent electrical specifications and regulatory compliance. Selection between these parts should be based on:

• Availability: The 0TLS040.TXLS currently maintains higher inventory (894 units versus 721 units), providing supply assurance for high-volume procurement.
• Regulatory Alignment: Both parts carry CE approval. The TPS-40V holds UR certification while the 0TLS040.TXLS holds cURus certification. Verify which certification requirement applies to your specific application jurisdiction.
• Response Characteristics: The 0TLS040.TXLS is specified as Fast Blow, providing defined response behavior for time-sensitive protection circuits.
• Physical Fit: Dimensional differences are minimal and within acceptable tolerances for standard through-hole PCB mounting. Verify clearance in your specific mechanical layout, particularly the 0.070" height difference (0.874" versus 0.944").

Frequently Asked Questions (FAQ)

Q: Can the 0TLS040.TXLS directly replace the TPS-40V in existing designs?

A: Yes, provided that the mechanical clearance accommodates the 0.944" length dimension and the cURus or CE certification meets your application requirements. The electrical parameters are equivalent.

Q: What is the significance of the "Fast Blow" response time specification on the 0TLS040.TXLS?

A: Fast Blow indicates the fuse will open quickly under overcurrent conditions, typically within milliseconds. This is suitable for protecting sensitive telecom circuits. Verify this response characteristic aligns with your circuit protection requirements.

Q: Are there dimensional constraints I should consider when substituting?

A: The 0TLS040.TXLS is 0.070" taller (0.944" L versus 0.874" H) and 0.001" smaller in diameter (0.562" versus 0.563"). Confirm adequate clearance in your PCB layout and component mounting area before substitution.

Q: Do both parts meet the same environmental and compliance standards?

A: Both parts are RoHS compliant and hold CE approval. The TPS-40V carries UR certification; the 0TLS040.TXLS carries cURus certification. Confirm which certification is required for your end application and geographic market.

Q: What is the breaking capacity, and why does it matter?

A: Both parts have a breaking capacity of 100kA at rated voltage. This specification indicates the maximum fault current the fuse can safely interrupt without rupturing or creating a hazard. This rating is critical for circuit protection reliability.