DCM-12 Equivalent & Substitute Parts

Part Overview

The DCM-12 is a 12A 600VAC/VDC fast-blow fuse cartridge manufactured by Eaton - Bussmann Electrical Division. This component is classified as obsolete, making substitute parts necessary for ongoing maintenance and new designs. The DCM-12 requires a holder for installation and is approved by CSA and UL for electrical and industrial applications. Equivalent parts must maintain identical electrical ratings and mechanical dimensions to ensure direct compatibility.

Substiute Parts

DCM-12

Eaton - Bussmann Electrical DivisionIn Stock: 1049DCM-12 Datasheet

Current PartRFQ

KTK-R-12

Eaton - Bussmann Electrical DivisionIn Stock: 1128KTK-R-12 Datasheet

SimilarRFQ

KLKD012.T

Littelfuse Inc.In Stock: 1132KLKD012.T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DCM-12 are qualified based on the following critical parameters:

• Current Rating: 12A (exact match required)
• Voltage Rating: 600 VAC minimum; 600 VDC where applicable
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge (exact match required)
• Package / Case: 5AG, 10mm x 38mm (Midget) (exact match required)
• Physical Dimensions: 0.406" Dia x 1.500" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Two substitute parts meet these criteria: KTK-R-12 (Eaton - Bussmann Electrical Division) and KLKD012.T (Littelfuse Inc.). Both maintain identical electrical and mechanical specifications, ensuring direct compatibility with existing DCM-12 installations.

Parameter Comparison

Engineering Selection Recommendations

Both KTK-R-12 and KLKD012.T are active products with current manufacturing support, making them suitable replacements for the obsolete DCM-12.

KTK-R-12 is manufactured by Eaton - Bussmann Electrical Division, the original DCM-12 manufacturer. This part maintains the same manufacturer lineage and carries CE, CSA, and UL approvals. The KTK-R-12 features a higher breaking capacity of 200kA, providing enhanced performance margins. However, DC voltage rating is not specified for this part.

KLKD012.T is manufactured by Littelfuse Inc. and maintains full electrical equivalence to the DCM-12, including both 600 VAC and 600 VDC ratings. This part carries CE, CSA, UL, and VDE approvals. The KLKD012.T is specifically rated for solar (photovoltaic) applications and provides identical breaking capacity specifications to the original DCM-12.

Selection between these two substitutes depends on application requirements. For applications requiring DC voltage operation, KLKD012.T is the appropriate choice. For AC-only applications where higher breaking capacity is beneficial, KTK-R-12 is suitable.

Frequently Asked Questions (FAQ)

Q: Can KTK-R-12 be used in applications requiring 600 VDC operation?

A: The KTK-R-12 specification does not include a DC voltage rating. For applications requiring 600 VDC operation, KLKD012.T is the appropriate substitute.

Q: Are the physical dimensions of all three parts identical?

A: DCM-12 and KTK-R-12 share identical dimensions of 0.406" Dia x 1.500" L (10.30mm x 38.10mm). KLKD012.T dimensions are 0.406" Dia x 1.500" L (10.31mm x 38.10mm), representing a negligible 0.01mm difference in length that does not affect mechanical compatibility.

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

A: DCM-12 and KLKD012.T both provide 100kA AC and 50kA DC breaking capacity. KTK-R-12 provides 200kA breaking capacity, offering higher fault current handling capability.

Q: Are all substitute parts RoHS compliant?

A: KTK-R-12 and KLKD012.T are both ROHS3 compliant. RoHS status for the original DCM-12 is not specified.

Q: Which substitute part is recommended for solar (photovoltaic) applications?

A: KLKD012.T is specifically rated for solar (photovoltaic) applications and maintains full 600 VAC/VDC ratings required for photovoltaic systems.

Q: Do all parts require the same holder for installation?

A: All three parts are cartridge fuses requiring a holder for installation. Physical dimension compatibility ensures mechanical interchangeability within existing DCM-12 holders.