KLDR012.T Equivalent & Substitute Parts

Part Overview

The KLDR012.T is a 12A 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 compatible substitutes essential for system maintenance and component replacement.

Substiute Parts

KLDR012.T

Littelfuse Inc.In Stock: 1138KLDR012.T Datasheet

Current PartRFQ

KLDR012.TXP

Littelfuse Inc.In Stock: 837KLDR012.TXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KLDR012.T is determined by strict equivalence across the following critical parameters:

• Current Rating: 12A (exact match required)
• Voltage Rating: 600 VAC / 300 VDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Slow Blow (exact match required)
• Class: CC (exact match required)
• Package / Case: 5AG, 10mm x 38mm (Midget) (exact match required)
• Physical Dimensions: 0.406" Dia x 1.500" L (exact match required)
• Breaking Capacity: 200kA AC, 20kA DC (exact match required)
• Approval Agencies: CE, CSA, UL (exact match required)

The KLDR012.TXP meets all substitution criteria as a direct equivalent within the same POWR-GARD® KLDR series.

Parameter Comparison

Engineering Selection Recommendations

The KLDR012.TXP is a direct functional equivalent to the KLDR012.T across all electrical and mechanical parameters. The primary distinction is product status: the KLDR012.T is obsolete while the KLDR012.TXP maintains active status. Additionally, the KLDR012.TXP achieves ROHS3 compliance, whereas the KLDR012.T is non-compliant. Both parts carry identical regulatory approvals (CE, CSA, UL) and maintain equivalent performance specifications for transformer protection applications.

Frequently Asked Questions (FAQ)

Q: Can KLDR012.TXP replace KLDR012.T in existing installations?

A: Yes. The KLDR012.TXP is electrically and mechanically equivalent to the KLDR012.T. Both parts share identical current ratings (12A), voltage ratings (600 VAC / 300 VDC), response characteristics (slow blow), and physical dimensions (0.406" Dia x 1.500" L). Installation in the same holder is compatible.

Q: What is the difference between these two part numbers?

A: The KLDR012.T is obsolete, while the KLDR012.TXP is active. The KLDR012.TXP additionally meets ROHS3 compliance standards. All electrical and mechanical specifications remain identical.

Q: Are there packaging differences between KLDR012.T and KLDR012.TXP?

A: The KLDR012.T is supplied with standard packaging, while the KLDR012.TXP is packaged in a box. Both parts use the same 5AG, 10mm x 38mm (Midget) case format and are functionally interchangeable.

Q: Do both parts require a holder for installation?

A: Yes. Both the KLDR012.T and KLDR012.TXP require a compatible fuse holder for operation. The physical dimensions (0.406" Dia x 1.500" L) ensure compatibility with standard 5AG midget fuse holders.

Q: What regulatory approvals apply to these parts?

A: Both parts carry CE, CSA, and UL approvals, confirming compliance with international safety standards for cartridge fuses rated at 600 VAC / 300 VDC.