ATQR10 Equivalent & Substitute Parts Reference

Part Overview

The ATQR10 is a 10A 600V cartridge fuse manufactured by Mersen USA Newburyport-MA L.L.C. This component is classified as a CC (Cartridge Class) fuse with slow-blow response characteristics, designed for electrical and industrial protection applications. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional classifications align with the original specification, enabling direct replacement in applications where the main part becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

ATQR10

Mersen USA Newburyport-MA L.L.C.In Stock: 1221ATQR10 Datasheet

Current PartRFQ

FNQ-R-10

Eaton - Bussmann Electrical DivisionIn Stock: 45357FNQ-R-10 Datasheet

SimilarRFQ

KLDR010.HXP

LittelfuseIn Stock: 1150KLDR010.HXP Datasheet

SimilarRFQ

KLDR010.TXP

Littelfuse Inc.In Stock: 1533KLDR010.TXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ATQR10 are qualified based on the following critical parameters that determine functional equivalence:

• Current Rating: 10A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Class: CC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5AG, 10mm x 38mm (Midget) (exact match required)
• Product Status: Active (ensures ongoing availability and support)
• RoHS Compliance: ROHS3 Compliant (regulatory alignment)

Three substitute parts meet all substitution criteria: FNQ-R-10 (Eaton - Bussmann Electrical Division), KLDR010.HXP (Littelfuse), and KLDR010.TXP (Littelfuse Inc.). Each maintains identical electrical ratings, mechanical dimensions, and functional classifications as the ATQR10.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment and continued manufacturer support. FNQ-R-10, KLDR010.HXP, and KLDR010.TXP are electrically and mechanically equivalent to the ATQR10 across all specified parameters.

FNQ-R-10 (Eaton - Bussmann Electrical Division) is rated for 200kA breaking capacity at 600 VAC and carries CE, CSA, and UL approvals. This part is available in bulk packaging with 45,287 units in stock.

KLDR010.HXP and KLDR010.TXP (both Littelfuse) provide identical 10A 600 VAC ratings with additional 300 VDC capability. Both are rated for 200kA AC and 20kA DC breaking capacity and carry CE, CSA, and UL approvals. KLDR010.HXP has 1,057 units available, while KLDR010.TXP has 1,520 units in stock. The primary distinction between these two Littelfuse variants is internal construction; both are suitable for transformer protection applications.

Selection among these three substitutes should be based on application-specific requirements, inventory availability, and established supplier relationships.

Frequently Asked Questions (FAQ)

Q: Can FNQ-R-10 be used as a direct replacement for ATQR10?

A: Yes. FNQ-R-10 meets all electrical and mechanical substitution criteria: 10A current rating, 600 VAC voltage rating, CC class, slow-blow response, and 5AG 10mm x 38mm package dimensions. Both parts are Active status and ROHS3 compliant.

Q: What is the difference between KLDR010.HXP and KLDR010.TXP?

A: Both parts share identical electrical ratings (10A 600 VAC / 300 VDC), mechanical dimensions, and functional classifications. The difference lies in internal construction and design variant designation. Both are suitable for direct substitution of the ATQR10.

Q: Do the Littelfuse KLDR parts offer any advantage over the Eaton FNQ-R-10?

A: KLDR010.HXP and KLDR010.TXP include 300 VDC rating capability in addition to 600 VAC, providing broader application flexibility. All three parts maintain identical AC ratings and are suitable for the ATQR10 application. Selection depends on whether DC voltage capability is required and inventory availability.

Q: Are all substitute parts certified to the same standards?

A: FNQ-R-10, KLDR010.HXP, and KLDR010.TXP all carry CE, CSA, and UL approvals. The ATQR10 approval agencies are not specified in the provided data. All substitutes are ROHS3 compliant and maintain Active product status.

Q: What is the physical package size for these fuses?

A: All parts use the 5AG package standard with dimensions of 10mm x 38mm (Midget), specified as 0.406" diameter x 1.500" length. This ensures mechanical compatibility across all four part numbers.

Q: Can these fuses be used interchangeably in the same holder?

A: Yes. All parts conform to the 5AG 10mm x 38mm (Midget) package specification and require a compatible fuse holder. Mechanical interchangeability is ensured across ATQR10, FNQ-R-10, KLDR010.HXP, and KLDR010.TXP.