DCM-2-1/2 Equivalent & Substitute Parts

Part Overview

The DCM-2-1/2 is a 2.5A 600VAC/VDC fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The cartridge format (5AG, 10mm x 38mm) necessitates a holder for installation and is designed for electrical and industrial applications requiring fast-response overcurrent protection.

Substiute Parts

DCM-2-1/2

Eaton - Bussmann Electrical DivisionIn Stock: 663DCM-2-1/2 Datasheet

Current PartRFQ

KTK-R-2-1/2

Eaton - Bussmann Electrical DivisionIn Stock: 1008KTK-R-2-1/2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete DCM-2-1/2 is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Package / Case: 5AG, 10mm x 38mm (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

The KTK-R-2-1/2 satisfies all substitution criteria as an active product with identical electrical and mechanical specifications. This part maintains functional and physical compatibility while offering improved availability and active product support status.

Parameter Comparison

Engineering Selection Recommendations

The KTK-R-2-1/2 is the direct equivalent for DCM-2-1/2 replacement. Selection is based on the following factors:

• Product Status: KTK-R-2-1/2 is active, ensuring ongoing availability and manufacturer support, whereas DCM-2-1/2 is obsolete.
• Electrical Equivalence: Both parts maintain identical current rating (2.5A), AC voltage rating (600 VAC), and response time (Fast Blow).
• Mechanical Compatibility: Identical cartridge dimensions (10mm x 38mm, 5AG package) ensure direct physical substitution in existing holders.
• Regulatory Compliance: KTK-R-2-1/2 carries expanded certifications (CE, CSA, UL) compared to DCM-2-1/2 (CSA, UL), providing broader regulatory acceptance.
• Enhanced Performance: KTK-R-2-1/2 offers superior breaking capacity (200kA) compared to DCM-2-1/2 (100kA AC, 50kA DC), providing additional safety margin.
• Environmental Compliance: KTK-R-2-1/2 is RoHS Compliant, meeting modern environmental standards.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are 2.5A, 600 VAC fast-blow cartridge fuses in the 5AG (10mm x 38mm) package format. They are mechanically and electrically equivalent and will function identically in the same holder assembly.

Q: What is the primary reason for substitution?

A: DCM-2-1/2 is obsolete. KTK-R-2-1/2 is an active product from the same manufacturer, ensuring continued procurement availability and manufacturer support.

Q: Are there any differences in breaking capacity?

A: Yes. KTK-R-2-1/2 has a breaking capacity of 200kA, compared to DCM-2-1/2 at 100kA AC and 50kA DC. This represents an enhancement in fault protection capability.

Q: Does KTK-R-2-1/2 support DC voltage operation?

A: KTK-R-2-1/2 specifications provided do not explicitly state DC voltage rating. DCM-2-1/2 is rated for 600 VDC. Verify DC voltage compatibility with the manufacturer if DC operation is required in your application.

Q: Are certifications equivalent?

A: KTK-R-2-1/2 carries additional CE certification beyond the CSA and UL certifications shared with DCM-2-1/2, providing broader regulatory acceptance in international markets.

Q: Is the physical package identical?

A: Yes. Both parts use the 5AG cartridge format with dimensions of 0.406" diameter x 1.500" length (10.30mm x 38.10mm). No holder modification is required.