TPS-40L Equivalent & Substitute Parts Reference

Part Overview

The TPS-40L is a 40A 170 VDC fuse cartridge manufactured by Eaton - Bussmann Electrical Division, designed for telecom applications with bolt mount configuration. This component is actively produced and stocked. Equivalent parts are identified when identical electrical ratings, mechanical compatibility, and approval certifications align with the original specification, enabling direct substitution in system designs and field replacements.

Substiute Parts

TPS-40L

Eaton - Bussmann Electrical DivisionIn Stock: 1112TPS-40L Datasheet

Current PartRFQ

0TLS040.TXL

Littelfuse Inc.In Stock: 10260TLS040.TXL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS-40L is determined by strict alignment of the following parameters:

• Current Rating: 40A (exact match required)
• Voltage Rating (DC): 170 VDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Bolt Mount (exact match required)
• Package / Case: Cylindrical, Blade Terminal (Bolt) (exact match required)
• Breaking Capacity @ Rated Voltage: 100kA (exact match required)
• Approval Certifications: CE and UR compliance (minimum requirement)

The substitute part 0TLS040.TXL meets all electrical and mechanical parameters. Physical dimension variation in length (0.874" vs. 1.740") does not preclude substitution when mounting space permits, as the critical diameter (0.563") and blade terminal configuration remain identical.

Parameter Comparison

Engineering Selection Recommendations

Both the TPS-40L and 0TLS040.TXL are active production components with current inventory availability. Selection between these parts should be based on:

Approval Certifications: The TPS-40L carries CE and UR certifications. The 0TLS040.TXL carries CE and cURus certifications. Both meet CE requirements. UR and cURus represent equivalent North American certification bodies; selection depends on specific system certification requirements.

Response Characteristic: The 0TLS040.TXL is specified as Fast Blow. The TPS-40L response time is not specified in available data. If response time is a critical design parameter, this difference must be evaluated against application requirements.

Physical Dimensions: The 0TLS040.TXL is longer (1.740" vs. 0.874"). Mounting space availability in the target application determines feasibility of this substitute. The identical 0.563" diameter ensures mechanical compatibility with blade terminal receptacles.

RoHS Compliance: Both parts meet RoHS requirements (RoHS Compliant and ROHS3 Compliant respectively), suitable for applications with environmental compliance mandates.

Frequently Asked Questions (FAQ)

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

A: Direct replacement is possible when the following conditions are met: (1) mounting cavity depth accommodates the longer 1.740" length, (2) system certification accepts cURus in place of UR, and (3) Fast Blow response time is compatible with circuit protection requirements.

Q: What is the significance of the length difference between these parts?

A: The TPS-40L measures 0.874" in length while the 0TLS040.TXL measures 1.740" in length. Both share the identical 0.563" diameter and blade terminal configuration. Length difference affects only mounting cavity depth; electrical and mechanical interface compatibility remains unchanged.

Q: Are both parts suitable for telecom applications?

A: Both parts are specified for telecom applications and carry appropriate approval certifications (CE for both; UR for TPS-40L, cURus for 0TLS040.TXL). Selection should confirm that the specific certification requirement of the target system is met.

Q: What does "Fast Blow" response time mean for the 0TLS040.TXL?

A: Fast Blow indicates the fuse element responds quickly to overcurrent conditions. The TPS-40L response time is not specified in available documentation. If response time is a design-critical parameter, application requirements must be evaluated against the Fast Blow characteristic of the substitute.

Q: Are there inventory considerations for these parts?

A: The TPS-40L has 1084 pieces in stock. The 0TLS040.TXL has 955 pieces in stock. Both are actively produced and available for procurement.