L77TSCG37SOL2C309 D-Sub 37 Position Receptacle Connector Equivalent & Substitute Parts

Part Overview

The L77TSCG37SOL2C309 is a 37 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets with vertical through-hole solder termination and board-side M3 flange mounting. The connector is classified as active product status and is RoHS compliant with UL94 V-0 flammability rating.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application mounting and flange configurations. Substitute D-Sub 37 position receptacle connectors must maintain compatibility across critical electrical parameters including voltage rating, current capacity, contact material, and operating temperature range, while accommodating variations in mounting style, shell finish, and flange feature design.

Substiute Parts

L77TSCG37SOL2C309

Amphenol ICC (Commercial Products)In Stock: 662L77TSCG37SOL2C309 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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172-E37-213R031

NorComp Inc.In Stock: 943172-E37-213R031 Datasheet

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172-E37-213R911

NorComp Inc.In Stock: 1200172-E37-213R911 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

Substitute parts for the L77TSCG37SOL2C309 are identified based on strict electrical and mechanical compatibility criteria. All substitute connectors must maintain the following core parameters:

Mandatory Compatibility Parameters:

• 37 position D-Sub receptacle configuration with female sockets
• 2-row connector layout, Shell Size 4 (DC, C)
• Solder termination method
• Through-hole or panel mount through-hole mounting capability
• 5A current rating per contact
• UL94 V-0 flammability rating
• Gold contact finish (flash thickness)
• Operating temperature range support for -55°C to 125°C applications

Variable Parameters Allowing Substitution:

• Flange feature design (Board Side M3, Board Side 4-40, Mating Side 4-40, Housing/Shell unthreaded)
• Shell material finish (Tin Plated, Nickel Plated, Tin-Nickel Plated)
• Contact material composition (Copper Alloy, Brass, Phosphor Bronze)
• Dielectric material type (Thermoplastic Glass Filled, Polyamide PA6T, Polybutylene Terephthalate)
• Voltage rating (250V minimum to 600V)
• Manufacturer source (Amphenol ICC, NorComp Inc., Assmann WSW Components)

Substitutes are grouped by mounting configuration and flange type to facilitate direct replacement in specific PCB layout scenarios.

Parameter Comparison

Engineering Selection Recommendations

Direct Mechanical Replacement (Board Side M3 Flange):

The D37S24A4PL00LF from Amphenol ICC (FCI) provides the closest mechanical compatibility with identical board-side M3 flange mounting. This connector maintains the same through-hole solder termination and supports the full operating temperature range of -55°C to 125°C. The D37S24A4PL00LF features phosphor bronze contacts with tin-nickel plated steel shell, providing enhanced corrosion resistance compared to the original tin-plated finish. Voltage rating of 300V is suitable for applications rated at 600V or lower. RoHS compliance status is confirmed.

Alternative Through-Hole Configurations:

The DC37S364TLF from Amphenol ICC (FCI) offers through-hole solder termination with unthreaded housing shell flange. This connector maintains 5A per contact current rating, 300V voltage rating, and full -55°C to 125°C operating temperature support. Contact material is copper alloy with gold flash finish, matching the original specification. RoHS compliance is confirmed.

The D37S24A4GX00LF from Amphenol ICC (FCI) provides through-hole mounting with 4-40 housing shell flange mounting. Current and voltage ratings, operating temperature range, and RoHS compliance match the D37S24A4PL00LF variant.

Panel Mount Alternatives (NorComp 172-E Series):

The 172-E37-213R011 from NorComp Inc. offers panel mount through-hole capability with board-side 4-40 flange mounting. This connector maintains 5A current rating and UL94 V-0 flammability rating. Operating temperature range is -50°C to 100°C, which is narrower than the original specification. Brass contact material with nickel-plated steel shell provides alternative material composition. ROHS3 compliance is confirmed.

The 172-E37-213R031 from NorComp Inc. provides mating-side 4-40 flange configuration for applications requiring connector-side mounting hardware. Current rating, flammability rating, and ROHS3 compliance are maintained.

The 172-E37-213R911 from NorComp Inc. includes board lock feature with dual flange mounting (board side and mating side female screwlock 4-40). This configuration provides enhanced mechanical retention for high-vibration applications.

Limited Electrical Capability Substitute:

The A-DF 37 PP/Z from Assmann WSW Components provides through-hole solder termination with unthreaded housing shell flange. Current rating is reduced to 3A per contact and voltage rating is 250V, representing lower electrical capacity than the original specification. Operating temperature range is -20°C to 105°C. This connector is suitable only for applications with reduced current and voltage requirements. ROHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the D37S24A4PL00LF directly replace the L77TSCG37SOL2C309 in existing PCB designs?

A: Yes. The D37S24A4PL00LF features identical board-side M3 flange mounting and through-hole solder termination. Both connectors support 5A current rating and -55°C to 125°C operating temperature range. The primary difference is shell material finish (tin-nickel versus tin plated) and contact material (phosphor bronze versus copper alloy), which do not affect mechanical fit or electrical compatibility for standard signal applications.

Q: What is the voltage rating difference between the L77TSCG37SOL2C309 (600V) and substitute parts?

A: The original connector is rated for 600V. Substitute parts from Amphenol ICC (FCI) series (D37S24A4PL00LF, D37S24A4GX00LF, DC37S364TLF) are rated for 300V. NorComp 172-E series parts do not specify voltage rating. For applications requiring 600V isolation or dielectric strength, the original L77TSCG37SOL2C309 or equivalent 600V-rated connectors must be used. For applications operating at 300V or lower, the Amphenol FCI substitutes are suitable.

Q: Are NorComp 172-E series connectors compatible with through-hole PCB designs intended for the L77TSCG37SOL2C309?

A: NorComp 172-E series connectors support both panel mount and through-hole mounting. However, flange feature variations (housing/shell unthreaded, board side 4-40, or mating side 4-40) differ from the original M3 board-side flange. PCB mounting hole patterns and flange screw hole locations must be verified before substitution. These connectors are suitable for panel-mounted applications or PCBs redesigned for 4-40 flange mounting.

Q: What is the operating temperature limitation when using NorComp 172-E series substitutes?

A: NorComp 172-E series connectors are rated for -50°C to 100°C operating temperature, compared to the original -55°C to 125°C range. Applications requiring operation below -50°C or above 100°C must use the original L77TSCG37SOL2C309 or Amphenol ICC (FCI) series substitutes (D37S24A4PL00LF, D37S24A4GX00LF, DC37S364TLF), which support the full -55°C to 125°C range.

Q: Is the A-DF 37 PP/Z suitable as a general substitute for the L77TSCG37SOL2C309?

A: The A-DF 37 PP/Z is not recommended as a general substitute. Current rating is reduced to 3A per contact (versus 5A), and voltage rating is 250V (versus 600V). Operating temperature range is -20°C to 105°C (versus -55°C to 125°C). This connector is suitable only for low-current, low-voltage applications with limited temperature range requirements.

Q: What RoHS compliance status applies to substitute parts?

A: The original L77TSCG37SOL2C309 is RoHS Compliant. Amphenol ICC (FCI) series substitutes (D37S24A4PL00LF, D37S24A4GX00LF, DC37S364TLF) are ROHS3 Compliant or RoHS Compliant. NorComp 172-E series parts are ROHS3 Compliant. Assmann WSW A-DF 37 PP/Z is ROHS3 Compliant. All substitutes meet current RoHS requirements.

Q: What is the difference between board-side M3 and board-side 4-40 flange mounting?

A: Board-side M3 flange uses metric M3 screw holes for PCB mounting. Board-side 4-40 flange uses imperial 4-40 UNC screw holes. These are not interchangeable without PCB redesign. The L77TSCG37SOL2C309 uses M3 mounting. NorComp 172-E37-213R011 and 172-E37-213R911 use 4-40 mounting. PCB hole patterns must match the selected connector flange specification.

Q: Can the D37S24A4GX00LF (4-40 housing shell flange) be used in place of the L77TSCG37SOL2C309 (M3 board side flange)?

A: No. The D37S24A4GX00LF features 4-40 housing shell flange mounting, which differs from the original M3 board-side flange. Housing shell flange mounting attaches to the connector shell rather than the PCB, requiring different mechanical design. This connector is suitable for applications with housing-mounted connector retention, not direct PCB mounting with the original M3 flange pattern.

Q: What contact material differences exist between substitute parts?

A: The original L77TSCG37SOL2C309 uses copper alloy contacts. Amphenol ICC (FCI) series substitutes use phosphor bronze contacts. NorComp 172-E series uses brass contacts. Assmann WSW A-DF 37 PP/Z uses copper alloy contacts. All contact materials are gold-plated (flash thickness) and suitable for signal-level applications. Contact material selection does not affect electrical compatibility for standard D-Sub signal applications.