KLDR025.T Equivalent & Substitute Parts

Part Overview

The KLDR025.T is a 25A cartridge fuse rated for 600 VAC / 300 VDC operation, manufactured by Littelfuse Inc. as part of the POWR-GARD® KLDR series. This component is designed for transformer protection applications and features slow-blow response characteristics with CC class rating. The part is currently listed as obsolete, making identification of suitable substitutes necessary for ongoing system maintenance and component procurement.

Substiute Parts

KLDR025.T

Littelfuse Inc.In Stock: 1269KLDR025.T Datasheet

Current PartRFQ

KLDR025.TXP

Littelfuse Inc.In Stock: 1573KLDR025.TXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KLDR025.T is determined by strict equivalence across the following critical parameters:

• Current Rating: 25A (exact match required)
• Voltage Rating: 600 VAC / 300 VDC (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Class: CC (exact match required)
• Physical Package: 5AG, 10mm x 38mm Midget cartridge (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Approval Certifications: CE, CSA, UL (minimum match required)

The KLDR025.TXP meets all substitution criteria as a direct equivalent within the same POWR-GARD® KLDR series, maintaining identical electrical and mechanical specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The KLDR025.TXP is the direct substitute for the obsolete KLDR025.T. Both components maintain identical electrical specifications (25A, 600 VAC / 300 VDC, slow-blow response, CC class) and mechanical form factor (5AG midget cartridge, 10mm x 38mm). The KLDR025.TXP carries active product status from Littelfuse Inc., ensuring continued availability and support. Both parts hold equivalent regulatory certifications (CE, CSA, UL) and maintain ROHS3 compliance. Selection of the KLDR025.TXP eliminates obsolescence risk while preserving full functional and physical compatibility with existing fuse holder installations.

Frequently Asked Questions (FAQ)

Q: Can the KLDR025.TXP be used as a direct replacement for the KLDR025.T?

A: Yes. The KLDR025.TXP is a direct equivalent substitute. Both components share identical current rating (25A), voltage ratings (600 VAC / 300 VDC), response time (slow-blow), fuse class (CC), physical dimensions (5AG, 10mm x 38mm), and regulatory certifications (CE, CSA, UL).

Q: What is the primary reason to transition from KLDR025.T to KLDR025.TXP?

A: The KLDR025.T is obsolete. The KLDR025.TXP maintains identical specifications while offering active product status, ensuring long-term availability and supply chain continuity.

Q: Are there any mechanical compatibility concerns when substituting these parts?

A: No. Both components use the 5AG midget cartridge package with identical dimensions (0.406" Dia x 1.500" L / 10.30mm x 38.10mm). Both require the same holder type and are mechanically interchangeable.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the KLDR025.T and KLDR025.TXP carry CE, CSA, and UL certifications and are ROHS3 compliant.

Q: What is the breaking capacity of these fuses?

A: Both components have a breaking capacity of 200kA AC and 20kA DC at rated voltage.