DM20-LK Terminal Block Connector Equivalent & Substitute Parts

Part Overview

The DM20-LK is a 2-position feed-through terminal block connector manufactured by Eaton - Bussmann Electrical Division, part of the Magnum® DM series. This component is designed for screw termination of conductors in the 12-22 AWG range and operates at IEC-rated specifications of 24 A and 500V. The product is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where legacy compatibility is not required.

Substiute Parts

DM20-LK

Eaton - Bussmann Electrical DivisionIn Stock: 861DM20-LK Datasheet

Current PartRFQ

1040880000

WeidmüllerIn Stock: 7971040880000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM20-LK is determined by equivalence across the following critical parameters:

• Electrical Performance: Current and voltage ratings must meet or exceed the application requirements. The DM20-LK operates at 24 A (IEC) / 20 A (UL) and 500V (IEC) / 300V (UL).
• Physical Configuration: 2-position, 1-level feed-through topology with 5.1mm terminal width.
• Termination Method: Screw-type termination for both main and substitute parts.
• Wire Gauge Compatibility: Acceptance of 12-22 AWG (0.5-2.5mm²) conductors.
• Regulatory Compliance: RoHS compliance and UL94 V-0 flammability rating.

The substitute part identified (1040880000) maintains functional equivalence across these parameters while offering enhanced electrical ratings and expanded wire gauge acceptance.

Parameter Comparison

Engineering Selection Recommendations

The Weidmüller part number 1040880000 is a direct functional equivalent to the DM20-LK. Both components meet identical IEC electrical specifications and share the same physical footprint and termination methodology. The substitute part is currently in active production status, ensuring availability for new applications and system replacements.

The 1040880000 provides enhanced electrical performance margins with UL ratings of 25 A and 600V compared to the DM20-LK's 20 A and 300V, and accepts a wider wire gauge range (0.5-4mm² versus 0.5-2.5mm²). Both components carry RoHS compliance and UL94 V-0 flammability certification, meeting equivalent regulatory requirements.

Selection between these parts should be based on application voltage and current requirements, availability, and any existing design constraints related to insulation material specifications or color coding.

Frequently Asked Questions (FAQ)

Q: Can the Weidmüller 1040880000 directly replace the DM20-LK in existing installations?

A: Yes. Both components share identical 2-position, 1-level feed-through configuration, 5.1mm terminal width, screw termination, and IEC electrical ratings (24 A, 500V). Physical mounting and electrical performance are equivalent.

Q: What are the key differences between these two parts?

A: The primary differences are product status (DM20-LK is obsolete; 1040880000 is active), insulation material composition (PA66 nylon versus thermoplastic Wemid), wire gauge acceptance range (0.5-2.5mm² versus 0.5-4mm²), and UL ratings (DM20-LK: 20 A/300V; 1040880000: 25 A/600V).

Q: Are there any compatibility concerns with different insulation materials?

A: Both materials meet UL94 V-0 flammability requirements and are suitable for equivalent operating environments. Material selection should be evaluated based on specific application temperature, chemical exposure, and mechanical stress requirements.

Q: Does the wider wire gauge acceptance of the 1040880000 affect compatibility?

A: No. The 1040880000 accepts the full 12-22 AWG range required by the DM20-LK application, plus additional capacity for larger conductors. This provides design flexibility without compromising compatibility.

Q: What is the significance of the active product status of the 1040880000?

A: Active product status indicates ongoing manufacturing and availability through standard distribution channels. This is advantageous for new designs and long-term system support compared to obsolete components.