ATM15 Equivalent & Substitute Parts Reference

Part Overview

The ATM15 is a 600V 15A midget fuse cartridge manufactured by Mersen USA Newburyport-MA L.L.C. This fast-blow fuse is designed for electrical and industrial applications requiring holder-mounted cartridge protection. The part maintains active product status with 947 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary ATM15 becomes unavailable or when procurement requirements necessitate alternative manufacturer selections.

Substiute Parts

ATM15

Mersen USA Newburyport-MA L.L.C.In Stock: 1006ATM15 Datasheet

Current PartRFQ

KLKR015.T

Littelfuse Inc.In Stock: 1553KLKR015.T Datasheet

MFR RecommendedRFQ

KTK-15

Eaton - Bussmann Electrical DivisionIn Stock: 1157KTK-15 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ATM15 are qualified based on the following critical parameters that determine functional interchangeability:

• Current Rating: 15A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Package / Case: 5AG, 10mm x 38mm Midget form factor (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Approval Agencies: CSA and/or UL certification (minimum requirement)

The identified substitutes meet these core electrical and mechanical parameters. Variations in DC voltage rating and breaking capacity do not preclude substitution when AC voltage and current ratings align with application requirements.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and carry CSA and UL certifications, meeting standard industrial approval requirements. The ATM15 and KTK-15 share identical breaking capacity specifications at 100kA, while the KLKR015.T provides enhanced breaking capacity at 200kA AC and 20kA DC. Physical dimensions across all three parts are within midget cartridge tolerances and are compatible with standard 5AG holders. The KLKR015.T specifies a reduced DC voltage rating of 300 VDC compared to the ATM15's 600 VDC; this difference is relevant only in applications requiring full 600 VDC DC-side protection. All parts comply with ROHS3 requirements and maintain equivalent electrical performance for standard AC industrial applications at 15A, 600 VAC.

Frequently Asked Questions (FAQ)

Q: Can KLKR015.T be used in place of ATM15 in all applications?

A: The KLKR015.T is electrically compatible for AC applications at 600 VAC, 15A. The DC voltage rating difference (300 VDC vs. 600 VDC) is relevant only if the circuit requires full 600 VDC protection. For AC-only or lower DC voltage applications, substitution is valid.

Q: Are the physical dimensions of these fuses identical?

A: All three parts conform to the 5AG midget cartridge standard. Dimensional variations (ATM15: 0.394" Dia x 1.496" L; KLKR015.T and KTK-15: 0.406" Dia x 1.500" L) fall within acceptable tolerances for standard 5AG holders and do not prevent interchangeability.

Q: What is the significance of the breaking capacity difference?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The KLKR015.T (200kA AC) provides higher fault current handling than ATM15 and KTK-15 (100kA). Selection depends on the circuit's maximum available fault current; higher breaking capacity does not create incompatibility in lower fault current applications.

Q: Do all parts require the same holder type?

A: Yes. All three parts are cartridge fuses requiring a holder. They are compatible with standard 5AG midget fuse holders.

Q: Which part should be selected for new designs?

A: Selection should be based on application voltage requirements, available fault current, and preferred supplier. All three parts meet active product status and standard certifications. For applications requiring 600 VDC protection, ATM15 or KTK-15 are appropriate. For AC-only applications, all three are suitable.