KLDR020.TXP Equivalent & Substitute Parts

Part Overview

The KLDR020.TXP is a 20A cartridge fuse manufactured by Littelfuse Inc. under the POWR-GARD® KLDR series. This component is rated for 600 VAC and 300 VDC applications, designed for transformer protection in industrial and electrical systems. The part is currently active in production with 798 units in stock. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and safety certifications align with the original specification, enabling direct replacement in existing holder assemblies.

Substiute Parts

KLDR020.TXP

Littelfuse Inc.In Stock: 886KLDR020.TXP Datasheet

Current PartRFQ

FNQ-R-20

Eaton - Bussmann Electrical DivisionIn Stock: 1206FNQ-R-20 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KLDR020.TXP is determined by strict equivalence across the following parameters:

• Current Rating: 20A (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 certification (required)

The FNQ-R-20 manufactured by Eaton - Bussmann Electrical Division meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

The FNQ-R-20 is a direct equivalent to the KLDR020.TXP based on complete parameter alignment. Both components carry identical electrical ratings, mechanical specifications, and safety certifications (CE, CSA, UL). Both are ROHS3 compliant and maintain the same breaking capacity at rated voltage. The FNQ-R-20 is manufactured by Eaton - Bussmann Electrical Division and is currently active in production with 1134 units in stock. Selection between these two parts may be based on availability, lead time, or procurement preference, as they are functionally and mechanically interchangeable within the same holder assembly.

Frequently Asked Questions (FAQ)

Q: Can the FNQ-R-20 be used as a direct replacement for the KLDR020.TXP?

A: Yes. The FNQ-R-20 meets all electrical and mechanical specifications required for direct substitution. Both components are 20A, 600 VAC / 300 VDC cartridge fuses with CC class rating, identical physical dimensions (0.406" Dia x 1.500" L), and equivalent breaking capacity (200kA AC, 20kA DC). Both hold CE, CSA, and UL certifications.

Q: Are there any dimensional differences between these parts?

A: No. Both the KLDR020.TXP and FNQ-R-20 conform to the 5AG, 10mm x 38mm (Midget) package standard with identical physical dimensions of 0.406" Dia x 1.500" L (10.30mm x 38.10mm). They are mechanically interchangeable in standard cartridge fuse holders.

Q: Do both parts have the same response time?

A: Yes. Both components are rated as Slow Blow fuses, providing identical protection characteristics for transformer and industrial electrical applications.

Q: What certifications apply to both parts?

A: Both the KLDR020.TXP and FNQ-R-20 carry CE, CSA, and UL approvals. Both are ROHS3 compliant and REACH unaffected.

Q: Are there differences in breaking capacity?

A: No. Both parts have identical breaking capacity ratings of 200kA AC and 20kA DC at their respective rated voltages.