DM20-GY Terminal Block Connector Equivalent & Substitute Parts

Part Overview

The DM20-GY 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 with electrical ratings of 24 A (IEC) at 500V and 20 A (UL) at 300V. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for system maintenance, repair, and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	DM20-GY
Manufacturer	Eaton - Bussmann Electrical Division
Category	Terminal Blocks
Type	Feed Through
Number of Positions	2
Number of Levels	1
Terminal Width	5.1mm
Termination Style	Screw
Wire Gauge Range (AWG)	12-22 AWG
Wire Gauge Range (mm²)	0.5-2.5mm²
Current Rating (IEC)	24 A
Voltage Rating (IEC)	500V
Current Rating (UL)	20 A
Voltage Rating (UL)	300V
Material - Insulation	Polyamide (PA66), Nylon 6/6
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

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

Electrical Compatibility: Current and voltage ratings must meet or exceed the original specification. The DM20-GY operates at 24 A (IEC) / 500V and 20 A (UL) / 300V.
Mechanical Compatibility: Number of positions (2), number of levels (1), terminal width (5.1mm), and termination style (screw) must be identical.
Wire Gauge Compatibility: The substitute must accommodate 12-22 AWG conductors. Wire gauge range in mm² may exceed the original specification without affecting substitution validity.
Material and Compliance: Insulation material must maintain UL94 V-0 flammability rating. RoHS compliance status must be maintained.

The Weidmüller 1040880000 meets all substitution criteria for the DM20-GY based on these parameters.

Parameter Comparison

Parameter	DM20-GY (Eaton)	1040880000 (Weidmüller)	Compatibility
Type	Feed Through	Feed Through	Match
Number of Positions	2	2	Match
Number of Levels	1	1	Match
Terminal Width	5.1mm	5.1mm	Match
Termination Style	Screw	Screw	Match
Wire Gauge (AWG)	12-22 AWG	12-22 AWG	Match
Wire Gauge (mm²)	0.5-2.5mm²	0.5-4mm²	Substitute exceeds specification
Current Rating (IEC)	24 A	24 A	Match
Voltage Rating (IEC)	500V	500V	Match
Current Rating (UL)	20 A	25 A	Substitute exceeds specification
Voltage Rating (UL)	300V	600V	Substitute exceeds specification
Material - Insulation	Polyamide (PA66), Nylon 6/6	Thermoplastic, Wemid	Functionally equivalent
Material Flammability Rating	UL94 V-0	UL94 V-0	Match
RoHS Status	RoHS Compliant	RoHS Compliant	Match
Product Status	Obsolete	Active	Substitute is current production

Engineering Selection Recommendations

The Weidmüller 1040880000 is a direct functional substitute for the obsolete Eaton DM20-GY terminal block connector. Both components share identical mechanical and electrical specifications for the critical parameters that determine substitution validity: 2-position feed-through configuration, 5.1mm terminal width, screw termination, 12-22 AWG wire gauge compatibility, and 24 A (IEC) / 500V rating.

The Weidmüller substitute provides enhanced electrical ratings (25 A UL / 600V UL versus 20 A / 300V) and extended wire gauge accommodation (0.5-4mm² versus 0.5-2.5mm²), both of which represent improvements over the original specification without introducing compatibility issues. Both components maintain UL94 V-0 flammability certification and RoHS compliance. The Weidmüller part is in active production status, ensuring availability for current and future sourcing requirements.

Frequently Asked Questions (FAQ)

Q: Can the Weidmüller 1040880000 be used as a direct replacement for the DM20-GY in existing applications?

A: Yes. The Weidmüller 1040880000 meets all mechanical and electrical substitution criteria. Both components are 2-position feed-through terminal blocks with 5.1mm terminal width, screw termination, and identical wire gauge and current/voltage ratings for IEC standards. The Weidmüller part exceeds UL ratings, which does not create compatibility issues.

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

A: The primary differences are manufacturer (Eaton versus Weidmüller), product status (obsolete versus active), insulation material composition (PA66 Nylon 6/6 versus Thermoplastic Wemid), and color (gray versus blue). The Weidmüller part provides higher UL current and voltage ratings and accommodates a wider wire gauge range in mm². These differences do not affect functional substitution.

Q: Are there any packaging or inventory considerations?

A: The DM20-GY is supplied in standard packaging with 627 units in stock. The Weidmüller 1040880000 is supplied in bulk packaging with 754 units in stock. Packaging format should be verified against procurement requirements.

Q: Does the color difference (gray versus blue) affect electrical performance?

A: No. Color is a visual identifier only and does not affect electrical or mechanical performance. The color difference reflects manufacturer design standards and does not impact substitution validity.

Q: Are both parts RoHS compliant?

A: Yes. Both the DM20-GY and Weidmüller 1040880000 are RoHS compliant. The Weidmüller part also carries REACH Unaffected status.

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