DCM-8 Equivalent & Substitute Parts Reference

Part Overview

The DCM-8 is a fast-blow cartridge fuse rated at 8A, 600 VAC/VDC, manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, though 910 units remain in stock. The DCM-8 is designed for electrical and industrial applications requiring reliable overcurrent protection in circuits rated up to 600 volts AC or DC. Due to its obsolete status, identifying equivalent substitute parts is essential for system maintenance, repair, and new design implementations where this fuse type is specified.

Substiute Parts

DCM-8

Eaton - Bussmann Electrical DivisionIn Stock: 979DCM-8 Datasheet

Current PartRFQ

KTK-8

Eaton - Bussmann Electrical DivisionIn Stock: 784KTK-8 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DCM-8 cartridge fuse is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be 8A
• Voltage Rating - AC: Must be 600 VAC minimum
• Fuse Type: Must be Cartridge
• Response Time: Must be Fast Blow
• Package / Case: Must be 5AG, 10mm x 38mm (Midget)
• Physical Dimensions: Must be 0.406" Dia x 1.500" L (10.30mm x 38.10mm)
• Mounting Type: Must require holder compatibility
• Approval Certifications: Must maintain CSA and UL approval

The KTK-8 meets all substitution criteria for the DCM-8 within the scope of AC voltage applications. Both components share identical current ratings, fuse type, response characteristics, package designation, and physical dimensions. Both are manufactured by Eaton - Bussmann Electrical Division and carry equivalent regulatory approvals.

Parameter Comparison

Engineering Selection Recommendations

The KTK-8 is a direct substitute for the DCM-8 in 600 VAC applications. Both components are manufactured by Eaton - Bussmann Electrical Division and maintain identical electrical and mechanical specifications for AC voltage circuits. The KTK-8 carries active product status, ensuring continued availability and supply chain reliability compared to the obsolete DCM-8.

For applications requiring 600 VDC capability, the DCM-8 specification includes explicit VDC rating, whereas the KTK-8 specification does not document DC voltage performance. In DC-only or mixed AC/DC circuits, component selection must be based on the specific voltage requirements of the application.

Both components carry CSA and UL approvals, meeting standard regulatory requirements for electrical and industrial applications. The physical form factor, holder compatibility, and breaking capacity specifications are equivalent between the two parts.

Frequently Asked Questions (FAQ)

Q: Can the KTK-8 replace the DCM-8 in all applications?

A: The KTK-8 is a direct substitute for DCM-8 in 600 VAC circuits. For applications requiring 600 VDC operation, the KTK-8 specification does not document DC voltage performance. Application voltage requirements must be confirmed before substitution.

Q: Are the physical dimensions identical between DCM-8 and KTK-8?

A: Yes. Both components are 0.406" diameter by 1.500" length (10.30mm x 38.10mm) and use the 5AG, 10mm x 38mm (Midget) package designation. Both require compatible fuse holders for installation.

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

A: The DCM-8 is classified as obsolete with 910 units in stock. The KTK-8 is an active product with 704 units in stock. Active product status indicates ongoing manufacturing and supply availability.

Q: Do both fuses carry the same regulatory approvals?

A: Yes. Both the DCM-8 and KTK-8 are certified by CSA and UL, meeting equivalent regulatory standards for electrical and industrial applications.

Q: What is the breaking capacity difference between these parts?

A: The DCM-8 specifies 100kA AC and 50kA DC breaking capacity. The KTK-8 specifies 100kA breaking capacity. For AC applications, the breaking capacity is equivalent.

Q: Can these fuses be used interchangeably in existing holders?

A: Yes. Both components use identical physical dimensions and the 5AG package designation, ensuring mechanical compatibility with standard 10mm x 38mm fuse holders.