SCHURTER 7025.5170 Equivalent & Substitute Parts

Part Overview

The SCHURTER 7025.5170 is a 15A ceramic cartridge fuse rated for 500VAC and 250VDC operation with slow-blow response characteristics. This component is classified as obsolete, making identification of compatible substitute parts essential for system maintenance and component replacement in legacy installations. The cartridge design requires a dedicated fuse holder for mounting and is rated for 100kA AC and 10kA DC breaking capacity.

Substiute Parts

7025.5170

SCHURTER Inc.In Stock: 10657025.5170 Datasheet

Current PartRFQ

LNRK015.T

Littelfuse Inc.In Stock: 968LNRK015.T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCHURTER 7025.5170 is determined by the following critical parameters:

Current Rating: The substitute must match the 15A current rating to ensure proper circuit protection.

Fuse Type & Mounting: Both the main part and substitute are cartridge-type fuses requiring a holder. Physical compatibility is maintained through standard cartridge dimensions.

Response Characteristic: The slow-blow response time must be preserved to prevent nuisance trips in circuits with inrush current.

Voltage Ratings: The substitute LNRK015.T operates at reduced voltage ratings (250VAC/125VDC) compared to the original specification (500VAC/250VDC). This represents a voltage derating and is acceptable only in applications where the circuit voltage does not exceed the substitute's ratings.

Breaking Capacity: The substitute provides enhanced breaking capacity (200kA AC, 20kA DC) compared to the original (100kA AC, 10kA DC), ensuring superior fault protection.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse LNRK015.T serves as an active substitute for the obsolete SCHURTER 7025.5170 based on matching current rating and response characteristics. The substitute is classified as active product status with current manufacturing support and enhanced regulatory compliance (ROHS3 compliant, CE/CSA/UL certified).

Physical dimensions show minor variation (0.563" vs 0.551" diameter; 2.000" vs 1.969" length), which remains within acceptable tolerance for standard cartridge fuse holders. Breaking capacity is doubled in the substitute, providing enhanced fault protection margins.

The primary consideration for substitution is voltage rating derating. The LNRK015.T is rated for 250VAC/125VDC compared to the original 500VAC/250VDC specification. Substitution is valid only when the actual circuit voltage does not exceed 250VAC or 125VDC. For applications requiring the full 500VAC/250VDC rating, alternative sources must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse LNRK015.T directly replace the SCHURTER 7025.5170 in all applications?

A: Direct replacement is valid only when circuit voltage does not exceed 250VAC or 125VDC. The substitute has lower voltage ratings than the original specification. Verify actual circuit voltage before substitution.

Q: Are the physical dimensions compatible with existing fuse holders?

A: Minor dimensional variations exist (diameter: 0.563" vs 0.551"; length: 2.000" vs 1.969"). These differences are within standard cartridge fuse holder tolerances and do not prevent physical installation.

Q: What is the significance of the enhanced breaking capacity in the substitute?

A: The LNRK015.T provides 200kA AC and 20kA DC breaking capacity compared to 100kA AC and 10kA DC in the original. This represents improved fault protection capability and is not a limitation for substitution.

Q: Does the substitute meet current regulatory requirements?

A: The Littelfuse LNRK015.T is ROHS3 compliant and carries CE, CSA, QPL, and UL certifications. The original SCHURTER part is RoHS non-compliant. Regulatory compliance requirements for your application must be evaluated.

Q: What is the response time characteristic of the substitute?

A: Both the original and substitute are slow-blow fuses, maintaining identical response characteristics for circuit protection in applications with inrush current.