L77DCG37SOL2RM5 D-Sub 37 Position Receptacle Connector

Part Overview

The L77DCG37SOL2RM5 is a 37 Position D-Sub Receptacle connector with female sockets, manufactured by Amphenol ICC (Commercial Products). This connector features vertical through-hole mounting with solder termination, board lock functionality, and operates across a wide temperature range of -55°C to 125°C. The product is actively manufactured and RoHS compliant. Alternative and equivalent connector models are necessary for supply chain continuity, design flexibility across different mounting configurations, and procurement options from multiple manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

L77DCG37SOL2RM5

Amphenol ICC (Commercial Products)In Stock: 1131L77DCG37SOL2RM5 Datasheet

Current PartRFQ

172-E37-213R001

NorComp Inc.In Stock: 1578172-E37-213R001 Datasheet

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172-E37-213R011

NorComp Inc.In Stock: 1242172-E37-213R011 Datasheet

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A-DF 37 PP/Z

Assmann WSW ComponentsIn Stock: 996A-DF 37 PP/Z Datasheet

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D37S24A4GX00LF

Amphenol ICC (FCI)In Stock: 1575D37S24A4GX00LF Datasheet

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D37S24A4PL00LF

Amphenol ICC (FCI)In Stock: 872D37S24A4PL00LF Datasheet

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DC37S364TLF

Amphenol ICC (FCI)In Stock: 1134DC37S364TLF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of D-Sub 37 Position receptacle connectors is determined by strict compatibility requirements across the following key parameters:

Critical Parameters for Substitution:

• Number of Positions: 37 (fixed requirement)
• Connector Type: Receptacle, Female Sockets (fixed requirement)
• Shell Size, Connector Layout: 4 (DC, C) (fixed requirement)
• Connector Style: D-Sub (fixed requirement)
• Termination: Solder (fixed requirement)
• Material Flammability Rating: UL94 V-0 (fixed requirement)

Parameters Allowing Variation Within Substitution:

• Manufacturer and Part Number (alternative sources)
• Mounting Type: Through Hole or Panel Mount (application-dependent)
• Flange Feature: Board Side (M3), Board Side (4-40), Housing/Shell (Unthreaded), or Housing/Shell (4-40)
• Shell Material Finish: Tin Plated, Nickel Plated, or Tin-Nickel Plated
• Contact Finish Thickness: 8.00µin or Flash
• Current Rating: 3A to 7.5A (dependent on application requirements)
• Voltage Rating: 250V to 300V (dependent on application requirements)
• Operating Temperature: -20°C ~ 105°C to -55°C ~ 125°C (dependent on environmental conditions)
• Contact Material: Brass, Copper Alloy, or Phosphor Bronze
• Dielectric Material: Thermoplastic (Glass Filled), Polyamide (PA6T), or Polybutylene Terephthalate (PBT)

Parameter Comparison

Engineering Selection Recommendations

When selecting substitute connectors for the L77DCG37SOL2RM5, the following criteria apply based on product compliance and active status:

Primary Substitutes (Full Compatibility): D37S24A4GX00LF and D37S24A4PL00LF are both actively manufactured Amphenol ICC (FCI) alternatives. Both parts maintain the complete electrical and thermal specification envelope of the main part, with operating temperature range -55°C ~ 125°C, voltage rating 300V, and all required UL94 V-0 flammability compliance. D37S24A4PL00LF carries RoHS Compliant certification matching the main part, while D37S24A4GX00LF carries ROHS3 Compliant certification. Both feature Board Side flange configurations, though with different fastening specifications (4-40 versus M3).

Secondary Substitutes (Extended Temperature or Current Specification): DC37S364TLF is an actively manufactured alternative from Amphenol ICC (FCI) with matching voltage rating 300V and operating temperature range -55°C ~ 125°C. This part carries RoHS Compliant certification. The part features Housing/Shell (Unthreaded) flange configuration and Copper Alloy contacts. Material flammability rating data is not specified for this part.

NorComp Inc. 172-E37-213R001 and 172-E37-213R011 are actively manufactured alternatives with ROHS3 Compliant certification. Both parts feature Panel Mount capability in addition to Through Hole configuration, accommodating different design approaches. Operating temperature range is reduced to -50°C ~ 100°C and current rating is 5A. Both parts carry Housing/Shell or Board Side (4-40) flange configurations with Nickel Plated finish.

Limited Current Rating Substitute: A-DF 37 PP/Z from Assmann WSW Components is actively manufactured with ROHS3 Compliant certification. Current rating is reduced to 3A, and operating temperature range is -20°C ~ 105°C. Voltage rating is 250V. This part is suitable only for lower-current applications requiring the reduced thermal and electrical envelope.

All substitute parts listed are actively manufactured products, ensuring ongoing availability for production and field service applications.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters that must match between the main part and a substitute? A: The connector must maintain 37 positions in D-Sub Size 4 (DC, C) configuration with female sockets, receptacle connector type, through-hole or panel mount solder termination, and UL94 V-0 material flammability rating. Variations in mounting type, flange feature, shell finish, contact material, and dielectric material are acceptable within the listed substitutes.

Q: Can the 172-E37-213R001 be used in place of L77DCG37SOL2RM5? A: The 172-E37-213R001 matches all critical electrical and mechanical parameters for connector compatibility. However, it features Panel Mount capability (in addition to through-hole), operates at reduced current rating (5A versus 7.5A), reduced operating temperature range (-50°C ~ 100°C versus -55°C ~ 125°C), and includes no specified voltage rating. Design validation is required to confirm the reduced current and temperature ratings are acceptable for the application.

Q: What is the difference between Board Side (M3) and Housing/Shell (Unthreaded) flange features? A: Board Side (M3) flange mounting uses M3 threaded fasteners to secure the connector to the PCB or mounting surface. Housing/Shell (Unthreaded) mounting integrates the fastening structure into the connector housing without external threaded inserts. Different mounting surfaces and mechanical constraints may require different flange configurations.

Q: Is the A-DF 37 PP/Z suitable for high-current applications? A: No. The A-DF 37 PP/Z carries a 3A current rating, limiting its use to applications requiring 3A per contact or less. The main part L77DCG37SOL2RM5 and most alternative parts support 5A to 7.5A current ratings and are preferred for higher-current designs.

Q: Are all substitute parts RoHS compliant? A: All listed substitute parts carry either RoHS Compliant or ROHS3 Compliant certification status. ROHS3 represents an updated revision of RoHS compliance standards. Both compliance levels are acceptable for applications requiring lead-free and hazardous substance restrictions.

Q: Can I use D37S24A4GX00LF in place of the original part in extreme temperature environments? A: Yes. The D37S24A4GX00LF maintains the complete operating temperature range -55°C ~ 125°C matching the main part L77DCG37SOL2RM5, along with 300V voltage rating. However, the REACH Status for this part is listed as REACH Affected, which may require regulatory compliance verification depending on the application region.