KLDR009.T Equivalent & Substitute Parts

Part Overview

The KLDR009.T is a 9A cartridge fuse manufactured by Littelfuse Inc. as part of the POWR-GARD® KLDR series. This component is rated for 600 VAC / 300 VDC operation with slow-blow response characteristics, designed for transformer protection applications. The KLDR009.T is classified as obsolete, making identification of suitable substitute components necessary for ongoing system maintenance and component procurement.

Substiute Parts

KLDR009.T

Littelfuse Inc.In Stock: 886KLDR009.T Datasheet

Current PartRFQ

KLDR009.TXP

Littelfuse Inc.In Stock: 1069KLDR009.TXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KLDR009.T is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 9A
• Voltage Rating: 600 VAC / 300 VDC
• Response Time: Slow Blow
• Fuse Class: CC
• Package / Case: 5AG, 10mm x 38mm (Midget)
• Physical Dimensions: 0.406" Dia x 1.500" L
• Breaking Capacity: 200kA AC, 20kA DC
• Approval Certifications: CE, CSA, UL

The KLDR009.TXP meets all these parameters and is classified as an active product within the same POWR-GARD® KLDR series, making it a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The KLDR009.TXP is the direct substitute for the obsolete KLDR009.T. Both components share identical electrical ratings, mechanical dimensions, and functional characteristics. The KLDR009.TXP offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. The KLDR009.TXP also meets ROHS3 compliance requirements, whereas the KLDR009.T does not, making the substitute preferable for applications subject to RoHS regulations. Both components maintain equivalent approval certifications (CE, CSA, UL) and breaking capacity specifications.

Frequently Asked Questions (FAQ)

Q: Can the KLDR009.TXP be used as a direct replacement for the KLDR009.T?

A: Yes. The KLDR009.TXP is electrically and mechanically equivalent to the KLDR009.T. Both components have identical current ratings (9A), voltage ratings (600 VAC / 300 VDC), response characteristics (slow blow), fuse class (CC), and physical dimensions (0.406" Dia x 1.500" L). Both require the same holder type and provide identical breaking capacity (200kA AC, 20kA DC).

Q: What is the difference between the KLDR009.T and KLDR009.TXP?

A: The primary differences are product status and RoHS compliance. The KLDR009.T is obsolete and RoHS non-compliant, while the KLDR009.TXP is an active product with ROHS3 compliance. Functionally and electrically, both components are identical.

Q: Are there any packaging differences between these components?

A: The KLDR009.T is supplied with standard packaging, while the KLDR009.TXP is supplied in box packaging. Both components use the same 5AG, 10mm x 38mm (Midget) package / case format and are physically interchangeable.

Q: Do both components require a fuse holder?

A: Yes. Both the KLDR009.T and KLDR009.TXP are cartridge fuses that require a dedicated holder for installation. They are not designed for direct panel mounting.

Q: What applications are these fuses suitable for?

A: Both components are rated for transformer protection applications. The 9A slow-blow characteristic and CC class rating make them suitable for circuits requiring protection against sustained overloads while tolerating brief inrush currents typical of transformer energization.