DCM-1 Equivalent & Substitute Parts Reference

Part Overview

The DCM-1 is a 1A 600VAC/VDC fast-blow cartridge fuse manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, though 1,098 units remain in stock as new original inventory. The DCM-1 requires a fuse holder for installation and is approved by CSA and UL agencies. Due to its obsolete status, identifying equivalent substitute parts is essential for ongoing maintenance, repair, and new design applications where this fuse type is specified.

Substiute Parts

DCM-1

Eaton - Bussmann Electrical DivisionIn Stock: 1157DCM-1 Datasheet

Current PartRFQ

KTK-1

Eaton - Bussmann Electrical DivisionIn Stock: 1056KTK-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DCM-1 is determined by strict equivalence across the following critical parameters:

• Current Rating: 1A (exact match required)
• Voltage Rating: 600 VAC minimum (DC rating may vary)
• Fuse Type: Cartridge (5AG class)
• Physical Dimensions: 10mm x 38mm (Midget form factor)
• Response Time: Fast Blow
• Mounting: Requires Holder (no change in installation method)
• Approval Agencies: CSA and UL certification required

The KTK-1 meets all substitution criteria for AC applications. The DCM-1 specifies both 600 VAC and 600 VDC ratings, while the KTK-1 specifies 600 VAC only. This difference must be evaluated based on the specific application voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

The KTK-1 is the direct substitute for the DCM-1 in AC applications. Both parts share identical current ratings, AC voltage ratings, physical dimensions, response characteristics, and CSA/UL approvals. The KTK-1 holds active product status, ensuring continued availability and supply chain reliability compared to the obsolete DCM-1.

The primary consideration is DC voltage application. The DCM-1 is rated for 600 VDC operation, while the KTK-1 specification does not include a DC voltage rating. For circuits operating exclusively at 600 VAC, the KTK-1 provides a direct replacement. For circuits requiring 600 VDC or mixed AC/DC operation, the absence of a specified DC rating for the KTK-1 must be evaluated against application requirements.

The KTK-1 carries ROHS3 compliance, whereas the DCM-1 compliance status is not specified. Both parts are REACH Unaffected and share identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the KTK-1 replace the DCM-1 in all applications?

A: The KTK-1 is a direct substitute for 600 VAC applications. For applications requiring 600 VDC operation, the KTK-1 DC voltage rating must be confirmed against application specifications before substitution.

Q: Are the physical dimensions identical between DCM-1 and KTK-1?

A: Yes. Both parts use the 5AG cartridge form factor with dimensions of 0.406" diameter by 1.500" length (10.30mm x 38.10mm). Both require a fuse holder for installation.

Q: What is the difference in product status between these parts?

A: The DCM-1 is obsolete with limited remaining inventory (1,098 units). The KTK-1 is active production, ensuring long-term availability and supply chain continuity.

Q: Do both parts carry the same certifications?

A: Yes. Both the DCM-1 and KTK-1 are approved by CSA and UL agencies and share identical ECCN and HTSUS classifications.

Q: What is the breaking capacity difference?

A: The DCM-1 specifies 100kA AC and 50kA DC breaking capacity. The KTK-1 specifies 100kA breaking capacity without separate DC designation.