ATMR5 Equivalent & Substitute Parts Reference

Part Overview

The ATMR5 is a 600V 5A CC class fuse manufactured by Mersen USA Newburyport-MA L.L.C. This cartridge fuse is designed for electrical and industrial applications requiring fast-blow protection at 5 amperes. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in holder-based installations.

Substiute Parts

ATMR5

Mersen USA Newburyport-MA L.L.C.In Stock: 1237ATMR5 Datasheet

Current PartRFQ

KLKR005.T

Littelfuse Inc.In Stock: 991KLKR005.T Datasheet

SimilarRFQ

KTK-R-5

Eaton - Bussmann Electrical DivisionIn Stock: 987KTK-R-5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATMR5 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 5A (exact match required)
• Voltage Rating - AC: 600V (exact match required)
• Fuse Class: CC (exact match required)
• Response Time: Fast Blow (exact match required)
• Approval Agencies: CE, CSA, UL certification required
• RoHS Compliance: ROHS3 Compliant (exact match required)
• Mounting Type: Requires Holder (mechanical compatibility)
• Package/Case: 5AG, 10mm x 38mm (Midget) (physical interchangeability)

The identified substitute parts KLKR005.T and KTK-R-5 meet all critical electrical parameters and mechanical dimensions, enabling direct replacement in existing fuse holder installations.

Parameter Comparison

Engineering Selection Recommendations

Both KLKR005.T (Littelfuse POWR-GARD® KLKR series) and KTK-R-5 (Eaton Limitron™ KTK-R series) are qualified substitutes for the ATMR5 based on the following criteria:

• All three parts carry identical electrical ratings: 5A, 600VAC, CC class, fast-blow response
• All three parts are ROHS3 compliant and maintain active product status
• Both substitutes carry CE, CSA, and UL approvals, meeting regulatory requirements
• Physical dimensions are identical (5AG, 10mm x 38mm Midget cartridge), ensuring mechanical interchangeability in standard fuse holders
• Breaking capacity ratings (200kA AC for KLKR005.T and KTK-R-5) exceed typical industrial application requirements

Selection between substitutes may be based on availability, packaging preference (Box vs. Bulk), or supply chain considerations, as electrical and mechanical performance are equivalent.

Frequently Asked Questions (FAQ)

Q: Can KLKR005.T or KTK-R-5 be used as direct replacements for ATMR5?

A: Yes. Both parts meet the critical substitution criteria: identical 5A current rating, 600VAC voltage rating, CC fuse class, fast-blow response time, and 5AG physical dimensions. They are mechanically and electrically interchangeable in standard fuse holder installations.

Q: What is the significance of the CC fuse class?

A: CC (Cartridge Class) designates a specific fuse standard defining physical dimensions, electrical characteristics, and breaking capacity. All three parts conform to this class, ensuring compatibility within CC-rated fuse holders.

Q: Does the KLKR005.T 300VDC rating affect substitution suitability?

A: No. The KLKR005.T 300VDC rating is an additional capability that does not diminish its suitability as a 600VAC substitute. The AC voltage rating remains the primary specification for this application.

Q: Are there packaging differences between the substitutes?

A: Yes. ATMR5 and KLKR005.T are supplied in Box packaging, while KTK-R-5 is supplied in Bulk packaging. This does not affect electrical or mechanical performance, only order quantity and handling considerations.

Q: What certifications should I verify before substitution?

A: All three parts carry CE, CSA, and UL approvals. Verify that your application requirements align with these certifications before implementation.

Q: Are all three parts ROHS3 compliant?

A: Yes. ATMR5, KLKR005.T, and KTK-R-5 are all ROHS3 compliant, meeting environmental and regulatory standards for electrical components.