ATMR1 Equivalent & Substitute Parts Reference

Part Overview

The ATMR1 is a 600V 1A CC fuse manufactured by Mersen USA Newburyport-MA L.L.C., currently in active product status with ROHS3 compliance. This cartridge fuse is designed for electrical and industrial applications requiring fast-blow protection at 1 ampere rating. Equivalent and substitute parts are necessary when the primary part is unavailable, when alternative packaging formats are required, or when sourcing from multiple qualified manufacturers is needed for supply chain continuity.

Substiute Parts

ATMR1

Mersen USA Newburyport-MA L.L.C.In Stock: 1120ATMR1 Datasheet

Current PartRFQ

0KLK001.T

Littelfuse Inc.In Stock: 12810KLK001.T Datasheet

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KLKR001.T

LittelfuseIn Stock: 1457KLKR001.T Datasheet

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KTK-R-1

Eaton - Bussmann Electrical DivisionIn Stock: 951KTK-R-1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the ATMR1 is determined by strict alignment of the following electrical and mechanical parameters:

• Current Rating: 1A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Fast Blow (exact match required)
• Class: CC (exact match required)
• Package / Case: 5AG, 10mm x 38mm (Midget) (exact match required)
• RoHS Status: ROHS3 Compliant (required for regulatory compliance)

All three substitute parts meet these core electrical and mechanical criteria. Voltage rating differences in DC specifications do not affect AC-primary applications. Packaging format (Box vs. Bulk) represents a logistical variation only and does not impact electrical performance or compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are qualified alternatives to the ATMR1 based on matching electrical specifications and mechanical form factors. Selection among substitutes should be based on:

• Availability: 0KLK001.T (1232 pcs), KLKR001.T (1435 pcs), KTK-R-1 (852 pcs) inventory levels
• Regulatory certifications: All parts carry CE, CSA, and UL approvals; 0KLK001.T additionally carries QPL certification
• Packaging requirements: KLKR001.T and ATMR1 are supplied in Box format; 0KLK001.T and KTK-R-1 are supplied in Bulk format
• DC voltage capability: 0KLK001.T provides 500 VDC rating; KLKR001.T provides 300 VDC rating; KTK-R-1 and ATMR1 do not specify DC ratings

All parts maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can 0KLK001.T, KLKR001.T, and KTK-R-1 be used interchangeably with ATMR1?

A: Yes, for AC applications at 600 VAC and 1A. All three substitute parts match the critical electrical parameters (current rating, AC voltage rating, response time, and class) and physical dimensions (5AG, 10mm x 38mm cartridge format). They are mechanically and electrically compatible with the same fuse holder.

Q: What is the difference between the substitute parts?

A: The primary differences are manufacturer, DC voltage rating, and packaging format. 0KLK001.T offers the highest DC rating (500 VDC) and includes QPL certification. KLKR001.T provides 300 VDC capability. KTK-R-1 does not specify a DC rating. Packaging varies between Box (ATMR1, KLKR001.T) and Bulk (0KLK001.T, KTK-R-1) formats.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ATMR1, 0KLK001.T, KLKR001.T, and KTK-R-1 are all ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Does packaging format affect electrical performance?

A: No. Box and Bulk packaging formats represent logistical variations only. Electrical performance, mechanical compatibility, and fuse characteristics remain identical regardless of packaging format.

Q: Which substitute part should I select for new designs?

A: Selection depends on application requirements and supply chain priorities. For AC-only applications, all three substitutes are equivalent. For applications requiring DC capability, 0KLK001.T (500 VDC) is preferred. For maximum regulatory coverage, 0KLK001.T includes QPL certification in addition to CE, CSA, and UL approvals.