DCM-1/2 Equivalent & Substitute Parts

Part Overview

The DCM-1/2 is a 500mA fast-blow fuse cartridge rated for 600 VAC and 600 VDC operation, manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, though 765 pieces remain available in new original stock. The part requires a dedicated fuse holder for installation and is approved by CSA and UL agencies. Due to its obsolete status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for system continuity and procurement planning.

Substiute Parts

DCM-1/2

Eaton - Bussmann Electrical DivisionIn Stock: 831DCM-1/2 Datasheet

Current PartRFQ

KTK-1/2

Eaton - Bussmann Electrical DivisionIn Stock: 1120KTK-1/2 Datasheet

SimilarRFQ

0KLK.500T

Littelfuse Inc.In Stock: 9010KLK.500T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DCM-1/2 is determined by strict alignment of the following parameters:

• Current Rating: 500mA (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge (exact match required)
• Package / Case: 5AG, 10mm x 38mm (Midget) (exact match required)
• Size / Dimension: 0.406" Dia x 1.500" L (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity @ Rated Voltage: 100kA AC minimum (exact match required)

The two identified substitute parts meet these core electrical and mechanical criteria. Voltage Rating - DC varies between the main part and one substitute; this difference is noted in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both KTK-1/2 and 0KLK.500T are active-status alternatives to the obsolete DCM-1/2. Selection between these substitutes depends on DC voltage requirements and regulatory compliance scope.

The KTK-1/2, manufactured by Eaton - Bussmann Electrical Division, maintains the same manufacturer lineage as the original part and carries CSA and UL approvals. DC voltage rating is not specified for this part; applications requiring confirmed 600 VDC operation should reference the manufacturer's technical documentation.

The 0KLK.500T, manufactured by Littelfuse Inc., is rated for 600 VAC and 500 VDC operation. This part carries expanded regulatory approvals including CE, CSA, QPL, and UL certifications, and is ROHS3 compliant. For applications requiring 600 VDC operation, the DCM-1/2 original specification exceeds the 0KLK.500T rating by 100 VDC.

Both substitutes are ROHS3 compliant and carry REACH Unaffected status, meeting modern environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can KTK-1/2 be used as a direct replacement for DCM-1/2?

A: The KTK-1/2 matches all critical electrical and mechanical parameters: 500mA current rating, 600 VAC voltage rating, fast-blow response, 5AG cartridge package, and 100kA breaking capacity. DC voltage rating is not specified for the KTK-1/2; applications requiring 600 VDC operation should confirm compatibility with the manufacturer.

Q: What is the DC voltage difference between DCM-1/2 and 0KLK.500T?

A: The DCM-1/2 is rated for 600 VDC, while the 0KLK.500T is rated for 500 VDC. For applications operating at or near 600 VDC, the 0KLK.500T does not meet the original specification. For applications operating below 500 VDC, the 0KLK.500T is suitable.

Q: Are both substitutes physically compatible with existing DCM-1/2 holders?

A: Yes. Both KTK-1/2 and 0KLK.500T use the 5AG cartridge package with dimensions 0.406" Dia x 1.500" L (10mm x 38mm), matching the DCM-1/2 physical specification. Both require a dedicated fuse holder for installation.

Q: Which substitute has broader regulatory approvals?

A: The 0KLK.500T carries CE, CSA, QPL, and UL approvals, compared to CSA and UL for the KTK-1/2. Both meet CSA and UL requirements. The 0KLK.500T is also ROHS3 compliant.

Q: Is the DCM-1/2 still available for procurement?

A: The DCM-1/2 is classified as obsolete but 765 pieces remain available in new original stock. For long-term supply assurance, active-status substitutes KTK-1/2 or 0KLK.500T are recommended.