DCML37P300 D-Sub Plug 37 Position Equivalent & Substitute Parts

Part Overview

The DCML37P300 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 4 (DC, C) shell size layout and is designed for signal applications requiring 7.5A per contact at 300V. The part is currently active in production with 1062 units in stock.

Substitute parts are necessary when the original DCML37P300 becomes unavailable, when alternative mounting configurations are required, or when compliance requirements differ between design phases and production implementation.

Key Parameters

Parameter	DCML37P300 Specification
Connector Type	D-Sub Plug, Male Pins
Number of Positions	37
Number of Rows	2
Shell Size, Connector Layout	4 (DC, C)
Mounting Type	Through Hole
Termination	Solder
Current Rating	7.5A per Contact
Voltage Rating	300V
Operating Temperature	-55°C to 125°C
Contact Material	Brass
Contact Finish	Gold
Shell Material, Finish	Steel, Yellow Cadmium Plated
Dielectric Material	Thermoplastic
Flammability Rating	UL94 V-0
RoHS Status	RoHS non-compliant
Packaging	Tray

Substitute Part Grouping Explanation

Substitution eligibility for the DCML37P300 is determined by the following mandatory parameters:

Connector type: D-Sub plug with male pins
Position count: 37 positions
Row configuration: 2 rows
Shell size layout: 4 (DC, C)
Termination method: Solder
Contact material: Brass
Contact finish: Gold
Flammability rating: UL94 V-0
Dielectric material: Thermoplastic or equivalent

Substitute parts are grouped into two categories based on mounting configuration:

Category A: Through-Hole Vertical Mount (Direct Functional Equivalents) Parts that maintain identical mounting orientation and through-hole solder termination: 2-5747705-1, 208009-1, 5208009-1, 5208009-3, 5745074-1, 5745074-2, 5745074-4, 5747375-2

Category B: Panel Mount Configuration (Functional Equivalents with Modified Mounting) Parts that provide 37-position D-Sub plug functionality with panel mount capability: 172-E37-113R011, 172-E37-113R911

Parameter Comparison

Parameter	DCML37P300	172-E37-113R011	172-E37-113R911	2-5747705-1	208009-1	5208009-1	5208009-3	5745074-1	5745074-2	5745074-4	5747375-2
Connector Type	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub Plug, Male Pins	Plug, Male Pins	D-Sub Plug, Male Pins	D-Sub 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	Panel Mount, Through Hole	Panel Mount, 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
Current Rating (Amps)	7.5A	5A	5A	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	300V	—	—	125V	125V	125V	125V	125V	125V	125V	125V
Operating Temperature	-55°C to 125°C	-50°C to 100°C	-50°C to 100°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
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
Shell Material, Finish	Steel, Yellow Cadmium Plated	Steel, Nickel Plated	Steel, Nickel Plated	Steel, Tin Plated	—	—	—	—	—	—	Steel, Tin Plated
Dielectric Material	Thermoplastic	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Thermoplastic	Polyester	Polyester	Polyester	Polyester	Polyester	Polyester	Polyester
Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Tray	Tray	Tray	Tube	Tube	Tube	Tube	Tube	Tube	Tube	Tube

Engineering Selection Recommendations

For RoHS3 Compliant Applications: Select from 172-E37-113R011, 172-E37-113R911, 2-5747705-1, 5208009-1, 5208009-3, 5745074-4, or 5747375-2. These parts meet ROHS3 compliance requirements and are suitable for modern production environments with RoHS mandates.

For Non-Compliant Legacy Systems: The DCML37P300 remains the primary choice for systems designed before RoHS implementation. Direct through-hole equivalents include 208009-1 and 5745074-1, which maintain RoHS non-compliant status matching the original specification.

For Panel Mount Integration: Parts 172-E37-113R011 and 172-E37-113R911 provide panel mount capability while maintaining 37-position D-Sub plug functionality. The 172-E37-113R911 includes board lock and grounding indents for enhanced mechanical retention.

For Current Rating Considerations: The DCML37P300 specifies 7.5A per contact. All substitute parts provide 5A to 6A per contact ratings. Applications requiring the full 7.5A specification must retain the DCML37P300 or conduct electrical analysis to confirm 6A operation is acceptable.

For Voltage Rating Considerations: The DCML37P300 specifies 300V. Substitute parts from TE Connectivity (2-5747705-1, 208009-1, 5208009-1, 5208009-3, 5745074-1, 5745074-2, 5745074-4, 5747375-2) specify 125V. NorComp parts (172-E37-113R011, 172-E37-113R911) do not specify voltage rating. Applications requiring 300V operation must retain the DCML37P300.

For Temperature Range Considerations: The DCML37P300 operates from -55°C to 125°C. NorComp substitutes operate from -50°C to 100°C. TE Connectivity substitutes operate from -55°C to 105°C. Applications requiring the full -55°C to 125°C range must retain the DCML37P300 or confirm reduced temperature limits are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 172-E37-113R011 for the DCML37P300 in a through-hole PCB design? A: The 172-E37-113R011 supports both panel mount and through-hole configurations. However, it operates at -50°C to 100°C versus the DCML37P300's -55°C to 125°C range, and provides 5A per contact versus 7.5A. Confirm these parameter reductions are acceptable for your application.

Q: What is the difference between 5745074-1, 5745074-2, and 5745074-4? A: All three are TE Connectivity AMPLIMITE HD-20 series 37-position D-Sub plugs with identical electrical and mechanical specifications. The numeric suffix indicates internal design variants. All are functionally equivalent for 37-position through-hole solder applications.

Q: Why do some substitutes specify 125V while the DCML37P300 specifies 300V? A: Voltage rating reflects the dielectric breakdown capability of the connector design. The DCML37P300 uses thermoplastic dielectric material rated for 300V. Most TE Connectivity substitutes use polyester dielectric rated for 125V. Applications requiring 300V operation must retain the DCML37P300.

Q: Are NorComp 172-E37 series connectors compatible with existing DCML37P300 mating connectors? A: Yes. Both use 37-position D-Sub shell size 4 (DC, C) configuration with identical pin layouts. The 172-E37 series includes panel mount flanges with different mounting hole patterns (4-40 threads) but maintains electrical and mechanical compatibility with standard D-Sub receptacles.

Q: What is the significance of the RoHS compliance difference? A: The DCML37P300 is RoHS non-compliant, typically due to yellow cadmium plating on the steel shell. RoHS3 compliant substitutes use alternative plating systems (nickel or tin). For new designs subject to RoHS regulations, select ROHS3 compliant parts. Legacy systems may retain non-compliant parts.

Q: Can I use 2-5747705-1 in place of DCML37P300 if my application only requires 6A per contact? A: Yes, if your application operates within 125V (versus 300V) and -55°C to 105°C (versus -55°C to 125°C) limits. The 2-5747705-1 is a direct through-hole solder equivalent with identical 37-position D-Sub configuration and includes grounding indents for enhanced EMI performance.

Q: What packaging differences exist between substitute parts? A: The DCML37P300 ships in trays. Most TE Connectivity substitutes ship in tubes. NorComp substitutes ship in trays. Tube packaging may affect handling and storage procedures but does not affect connector functionality.

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