KLDR01.8T Equivalent & Substitute Parts

Part Overview

The KLDR01.8T is a 1.8A cartridge fuse rated for 600 VAC and 300 VDC operation, manufactured by Littelfuse Inc. as part of the POWR-GARD® KLDR series. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement. The slow-blow response characteristic and CC class rating designate this fuse for transformer protection applications requiring coordinated overcurrent response.

Substiute Parts

KLDR01.8T

Littelfuse Inc.In Stock: 1040KLDR01.8T Datasheet

Current PartRFQ

KLDR01.8TXP

Littelfuse Inc.In Stock: 1033KLDR01.8TXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KLDR01.8T is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.8A (exact match required)
• Voltage Rating: 600 VAC / 300 VDC (exact match required)
• Response Time: Slow Blow (exact match required)
• Class: CC (exact match required)
• Package / Case: 5AG, 10mm x 38mm (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 Certifications: CE, CSA, UL (exact match required)

The KLDR01.8TXP 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.

Parameter Comparison

Engineering Selection Recommendations

The KLDR01.8TXP is the direct substitute for the obsolete KLDR01.8T. Both components maintain identical electrical specifications, mechanical dimensions, and regulatory certifications. The primary distinction is product status: KLDR01.8TXP carries active status with confirmed inventory availability, whereas KLDR01.8T is obsolete. For new designs and ongoing procurement, KLDR01.8TXP is the appropriate selection. Both components satisfy CE, CSA, and UL compliance requirements and maintain ROHS3 compliance status.

Frequently Asked Questions (FAQ)

Q: Can KLDR01.8TXP be used as a direct replacement for KLDR01.8T in existing applications?

A: Yes. The KLDR01.8TXP is electrically and mechanically identical to KLDR01.8T. Both components share the same current rating (1.8A), voltage ratings (600 VAC / 300 VDC), response time (Slow Blow), class (CC), physical dimensions (0.406" Dia x 1.500" L), and regulatory certifications (CE, CSA, UL).

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

A: KLDR01.8T is classified as obsolete, indicating discontinued manufacturing and limited availability. KLDR01.8TXP maintains active status with ongoing production and confirmed inventory. For procurement purposes, KLDR01.8TXP is the recommended selection.

Q: Are there any packaging differences between KLDR01.8T and KLDR01.8TXP?

A: The original KLDR01.8T does not specify packaging detail in available documentation. KLDR01.8TXP is supplied in box packaging. Both components use identical 5AG, 10mm x 38mm (Midget) case format and physical dimensions.

Q: Do both parts require a holder for installation?

A: Yes. Both KLDR01.8T and KLDR01.8TXP are cartridge fuses that require a compatible holder for operation. The 5AG, 10mm x 38mm form factor specifies the holder compatibility requirement.

Q: Are regulatory certifications maintained across both part numbers?

A: Yes. Both KLDR01.8T and KLDR01.8TXP carry identical approval certifications: CE, CSA, and UL. Both components are ROHS3 compliant.