L777SDCH37POL2 D-Sub 37-Position Plug Connector - Equivalent & Substitute Parts

Part Overview

The L777SDCH37POL2 is a 37-position D-Sub plug connector manufactured by Amphenol ICC, designed for vertical solder termination on printed circuit boards. This connector features male pins, a 2-row configuration with shell size 4 (DC, C) layout, and is specified for signal applications requiring 3A current capacity at 250V. The product maintains Active status with RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are identified to address supply chain requirements, manufacturing discontinuity, or system-level design flexibility while maintaining electrical and mechanical compatibility within the specified parameter envelope.

Key Parameters

Parameter	L777SDCH37POL2 (Main Part)
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
Connector Style	D-Sub
Contact Type	Signal
Material Flammability Rating	UL94 V-0
Contact Finish	Gold
Contact Material	Brass
Color	Black
Operating Temperature Range	-55°C to 125°C
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Connector Configuration: 37 positions, 2-row arrangement, Shell Size 4 (DC, C) layout, D-Sub style, Plug configuration with male pins
Termination Method: Solder termination
Mounting: Through-hole PCB mounting
Contact System: Signal-type brass contacts with gold finish
Electrical Performance: Voltage rating, current capacity, and operating temperature range
Flammability: UL94 V-0 rating required
Mechanical Interface: Consistent with PCB mounting and mating requirements

All substitute parts identified in this reference maintain the core 37-position D-Sub plug configuration, through-hole solder termination, and Shell Size 4 (DC, C) layout. Variations in flange features (board-side, mating-side, or housing-integrated), shell finish specifications, dielectric materials, and compliance certifications are technical distinctions that do not disqualify substitution but warrant system-level design review based on application-specific requirements.

Parameter Comparison

Parameter	L777SDCH37POL2	2-5747705-1	208009-1	5208009-1	5745074-1	5745074-2	5745074-4	5747375-2	5747375-8	747375-2	747375-8
Manufacturer	Amphenol ICC	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
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)
Connector Style	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub	Plug 37POS*	D-Sub	D-Sub	D-Sub	D-Sub	D-Sub
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
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
Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
Material 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
Operating Temperature Range	-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 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Current Rating (Amps)	3A	6A	6A	6A	6A	6A	6A	6A	6A	6A	6A
Voltage Rating	250V	125V	125V	125V	125V	125V	125V	125V	125V	125V	125V
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 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	Not applicable
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

*Note: 5745074-2 lists "Plug 37POS" as connector style instead of explicit "D-Sub" designation; functionally equivalent configuration.

Engineering Selection Recommendations

Parts with Full Specification Alignment (Temperature and Voltage):

The following substitute parts maintain the complete operating temperature range of -55°C to 125°C and voltage rating of 250V: This reference does not identify substitute parts that match both the 250V voltage rating and -55°C to 125°C temperature range of the main part L777SDCH37POL2. All identified TE Connectivity alternatives operate at 125V maximum voltage and -55°C to 105°C temperature range.

Parts with Restricted Operating Range:

All TE Connectivity substitutes (2-5747705-1, 208009-1, 5208009-1, 5745074-1, 5745074-2, 5745074-4, 5747375-2, 5747375-8, 747375-2, 747375-8) are rated for 125V maximum and -55°C to 105°C operating temperature. These parts are electrically and mechanically compatible for applications where system voltage requirements do not exceed 125V and maximum operating temperature does not exceed 105°C.

RoHS Compliance Consideration:

For applications requiring RoHS compliance, the following parts are qualified: 2-5747705-1 (ROHS3), 5208009-1 (ROHS3), 5745074-1 (RoHS Compliant), 5745074-2 (RoHS Compliant), 5745074-4 (ROHS3), 5747375-2 (ROHS3), and 5747375-8 (ROHS3). Parts 208009-1, 747375-2, and 747375-8 are non-compliant or status undefined and are not suitable for RoHS-mandated applications.

Part Availability and Lead Time:

Inventory levels are provided for supply chain planning. Current stock of the main part L777SDCH37POL2 is 897 units. TE Connectivity substitutes range from 903 to 1629 units in inventory, indicating general availability across the substitute base.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity 37-position D-Sub plugs with 125V rating replace the L777SDCH37POL2 in a 250V application?

A: No. The TE Connectivity substitute parts are rated for 125V maximum. Applications requiring 250V operation must use the L777SDCH37POL2 or confirm system voltage requirements do not exceed 125V before substituting.

Q: Are all substitute parts compatible with the same PCB footprint and mating connectors?

A: All substitute parts share the same 37-position Shell Size 4 (DC, C) configuration and through-hole solder termination, ensuring PCB footprint compatibility. Mating compatibility depends on the corresponding receptacle connector specification; consult receptacle documentation for confirmation.

Q: What is the difference between Housing/Shell (Unthreaded) and Housing/Shell (4-40) flange features?

A: Flange features define the mechanical interface to the PCB or mounting panel. Housing/Shell (Unthreaded) offers friction-fit mounting, while Housing/Shell (4-40) provides threaded mounting holes for M4 fasteners (4-40 UNC standard). Both configurations maintain electrical functionality and are mechanically interchangeable in designs that accommodate the respective mounting method.

Q: Do substitute parts with different dielectric materials (Polyester vs. Thermoplastic, Glass Filled) affect signal integrity?

A: Signal integrity is determined by contact geometry, spacing, and shielding rather than dielectric material in D-Sub connector applications. Both polyester and glass-filled thermoplastic dielectrics are standard materials that support UL94 V-0 flammability requirements. Material selection reflects manufacturing process differences and does not introduce functional performance variation for signal applications.

Q: Why is the current rating higher (6A) on substitute parts versus the main part (3A)?

A: Current rating specifications reflect design margins and manufacturing process capabilities. TE Connectivity substitute parts are rated for 6A, while the Amphenol ICC L777SDCH37POL2 is rated for 3A. Applications requiring 3A operation function within the specification envelope of all substitute parts. Application designs limited to 3A do not require selection based on the higher current rating of substitutes.

Q: Which substitute parts meet RoHS3 compliance requirements?

A: Parts designated as ROHS3 Compliant are 2-5747705-1, 5208009-1, 5745074-4, 5747375-2, and 5747375-8. The main part L777SDCH37POL2 is RoHS Compliant (RoHS 2 era). Confirm specific RoHS directive applicability for your regulatory jurisdiction and supply chain requirements.

Q: Are substitute parts with different contact finish thicknesses interchangeable?

A: Contact finish thickness variations (15.0µin, Flash, or not specified) do not affect interchangeability. Gold finish thickness on brass contacts serves reliability and oxidation resistance functions. Variations in finish specification reflect manufacturing process documentation differences and do not impact connector performance in signal applications.

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