DCMF37P300 D-Sub Plug 37 Position Equivalent & Substitute Parts

Part Overview

The DCMF37P300 is a 37-position D-Sub plug connector manufactured by Amphenol ICC (FCI) in the DM HE501 series. This through-hole solder termination connector features male pins with a 2-row configuration in shell size 4 (DC, C) layout. The connector is designed for signal applications with a current rating of 7.5A and operates across the temperature range of -55°C to 125°C. The part is currently active in production with 810 units in stock. Equivalent and substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative compliance certifications are required, or when design specifications allow for compatible alternatives from other manufacturers.

Key Parameters

Parameter	DCMF37P300 Specification
Connector Type	Plug, Male Pins
Number of Positions	37
Number of Rows	2
Shell Size, Connector Layout	4 (DC, C)
Mounting Type	Through Hole
Termination	Solder
Contact Type	Signal
Current Rating	7.5A
Operating Temperature	-55°C to 125°C
Contact Material	Brass
Contact Finish	Gold
Shell Material, Finish	Steel, Cadmium Plated
Dielectric Material	Thermoplastic, Glass Filled
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DCMF37P300 is determined by strict equivalence in the following core parameters:

Connector type: Plug with male pins
Position count: 37 positions
Row configuration: 2 rows
Shell size and layout: 4 (DC, C)
Mounting method: Through hole
Termination method: Solder
Contact material: Brass
Contact finish: Gold
Dielectric material composition
Operating temperature range compatibility
Moisture sensitivity level: 1 (Unlimited)

All substitute parts listed maintain these core electrical and mechanical parameters. Variations in secondary attributes such as shell material finish (cadmium plated versus tin plated), flange feature design (unthreaded housing versus screwlock), and compliance certifications (RoHS status, REACH classification) do not affect functional interchangeability within the specified parameter set.

Parameter Comparison

Parameter	DCMF37P300	2-5747705-1	208009-1	5208009-1	5208009-3	5745074-1	5745074-2	5745074-4	5747375-2	5747375-8	745054-4
Manufacturer	Amphenol ICC (FCI)	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP	TE Connectivity AMP
Connector Type	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins	Plug, Male Pins
Number of Positions	37	37	37	37	37	37	37	37	37	37	37
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Shell Size, Connector Layout	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)	4 (DC, C)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Type	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal	Signal
Contact Material	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass	Brass
Contact Finish	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Operating Temperature	-55°C to 125°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Current Rating	7.5A	6A	6A	6A	6A	6A	6A	6A	6A	6A	6A
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the DCMF37P300 across core electrical and mechanical parameters. Selection among substitutes should be based on the following criteria:

RoHS Compliance Requirements: If RoHS3 compliance is mandated, select from 2-5747705-1, 5208009-1, 5208009-3, 5745074-4, 5747375-2, 5747375-8, or 745054-4. If RoHS compliance is not required, 208009-1 remains available.

Operating Temperature Margin: The DCMF37P300 operates to 125°C, while all substitute parts are rated to 105°C maximum. Applications requiring operation above 105°C cannot use these substitutes.

Current Rating Consideration: The DCMF37P300 is rated at 7.5A, while all substitute parts are rated at 6A. Applications requiring current above 6A cannot use these substitutes.

Flange Feature Compatibility: Substitutes with mating-side female screwlock features (2-5747705-1, 5745074-1, 5745074-2, 5745074-4) differ from the unthreaded housing design of the DCMF37P300. Verify mechanical compatibility with mating connectors before selection.

Shell Material Finish: The DCMF37P300 features cadmium-plated steel. Substitute parts use either tin-plated steel (2-5747705-1, 5747375-2, 5747375-8) or unspecified shell material finish. Environmental and corrosion requirements should guide selection.

Inventory Availability: All substitute parts are in active production with inventory ranging from 624 to 1629 units.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower current rating (6A) in place of the DCMF37P300 (7.5A)?

A: No. If your application requires current above 6A, the substitute parts are not suitable. The current rating is a hard electrical limit and cannot be exceeded.

Q: What is the impact of the 20°C difference in maximum operating temperature?

A: The DCMF37P300 operates to 125°C while substitutes operate to 105°C. If your application requires sustained operation above 105°C, substitutes are not compatible. For applications operating below 105°C, the temperature difference does not affect functionality.

Q: Are the screwlock flange variants mechanically compatible with my existing mating connectors?

A: Substitutes with mating-side female screwlock features (4-40) differ from the unthreaded housing design of the DCMF37P300. Mechanical compatibility depends on your mating connector design. Verify that your mating connector accommodates the screwlock feature before substitution.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance is a regulatory and material composition requirement, not an electrical performance specification. All parts maintain identical electrical characteristics regardless of RoHS status.

Q: What is the difference between tin-plated and cadmium-plated shell finishes?

A: Shell material finish affects corrosion resistance and environmental durability. Cadmium plating (DCMF37P300) and tin plating (certain substitutes) provide different levels of protection in specific environments. Select based on your application's environmental exposure requirements.

Q: Can I mix DCMF37P300 and substitute parts in the same assembly?

A: Yes, provided all parts meet your application's electrical and mechanical requirements. However, maintaining consistent part sourcing is recommended for long-term supply chain stability and design consistency.

Q: What does "REACH Affected" or "REACH Unaffected" mean for substitution?

A: REACH status indicates regulatory classification under European chemical regulations. This is a compliance and sourcing consideration, not an electrical or mechanical parameter. Select based on your market and regulatory requirements.

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