L77DCF37SOL2 Equivalent & Substitute Parts

Part Overview

The L77DCF37SOL2 is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This female sockets connector features vertical solder termination and is designed for signal applications in industrial and commercial equipment. The connector is actively produced and maintains full RoHS compliance with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 37-position D-Sub receptacle functionality.

Substiute Parts

L77DCF37SOL2

Amphenol ICC (Commercial Products)In Stock: 695L77DCF37SOL2 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 eligibility for the L77DCF37SOL2 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Connector type: Receptacle, Female Sockets
• Number of positions: 37
• Shell size / connector layout: 4 (DC, C)
• Termination method: Solder
• Connector style: D-Sub

Secondary Compatibility Criteria:

• Mounting type: Through Hole (primary); Panel Mount variants acceptable with design verification
• Voltage rating: Minimum 300V
• Operating temperature range: Minimum -55°C to 125°C coverage
• Material flammability: UL94 V-0
• RoHS compliance status: Active product requirement

Acceptable Variation Parameters:

• Current rating: Substitute parts rated 3A to 7.5A per contact are acceptable based on application requirements
• Shell material finish: Steel with Tin Plated, Nickel Plated, or Tin-Nickel Plated finishes are interchangeable
• Contact finish thickness: Flash or specified thickness (8.00µin) both acceptable
• Flange feature: Housing/Shell variants (Unthreaded, 4-40, M3, Board Side 4-40) are functionally equivalent for through-hole applications
• Dielectric material: Thermoplastic, Glass Filled; Polyamide (PA6T); or Polybutylene Terephthalate (PBT) compositions are acceptable
• Contact material: Brass or Phosphor Bronze acceptable

Substitute parts that deviate from primary compatibility criteria or lack active product status are not recommended for direct replacement without design review.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 Substitutes (Highest Compatibility):

D37S24A4GX00LF and D37S24A4PL00LF (Amphenol ICC FCI, Delta D Series) are the primary substitute options. Both parts maintain identical operating temperature range (-55°C to 125°C), voltage rating (300V), and flammability rating (UL94 V-0) as the L77DCF37SOL2. These parts feature Phosphor Bronze contacts with gold finish and Polybutylene Terephthalate dielectric material. Current rating is 5A per contact, which is lower than the 7.5A rating of the main part but remains suitable for standard signal applications. Both parts carry active product status and RoHS compliance. The primary difference between these two is the flange feature: D37S24A4GX00LF includes a 4-40 threaded housing, while D37S24A4PL00LF features an M3 threaded housing. Selection between these two depends on mechanical mounting requirements.

DC37S364TLF (Amphenol ICC FCI, D Series) is a secondary substitute option. This part matches the L77DCF37SOL2 in shell material finish (Steel, Tin Plated), flange feature (Housing/Shell Unthreaded), operating temperature range (-55°C to 125°C), and voltage rating (300V). Current rating is 5A per contact. Material flammability rating is not specified for this part. RoHS compliance and active product status are confirmed. This part is suitable for applications where the unthreaded flange configuration is required.

Tier 2 Substitutes (Conditional Compatibility):

172-E37-213R001 and 172-E37-213R011 (NorComp Inc., 172-E M Series) are acceptable substitutes for applications with reduced thermal and electrical requirements. Both parts feature Panel Mount and Through Hole mounting capability, providing mechanical flexibility. Operating temperature range (-50°C to 100°C) is narrower than the main part, and voltage rating is not specified. Current rating is 5A. Both parts carry ROHS3 compliance and active product status. The 172-E37-213R011 includes a Board Side 4-40 flange feature, while 172-E37-213R001 has an unthreaded housing. These parts are suitable for applications operating within the -50°C to 100°C temperature window.

A-DF 37 PP/Z (Assmann WSW Components) is a limited-use substitute. This part has the lowest current rating (3A) among all listed substitutes and the lowest voltage rating (250V). Operating temperature range (-20°C to 105°C) is narrower than the main part. This part is suitable only for low-current signal applications and should be selected only when current and voltage requirements are confirmed to be within specification. ROHS3 compliance and active product status are confirmed.

Selection Criteria Summary:

For applications requiring full thermal range (-55°C to 125°C) and 300V operation, select D37S24A4GX00LF or D37S24A4PL00LF based on flange mounting requirements. For applications with reduced thermal requirements (-50°C to 100°C), NorComp 172-E series parts are acceptable. For low-current applications (≤3A), A-DF 37 PP/Z is suitable. All substitute parts maintain active product status, RoHS compliance, and UL94 V-0 flammability rating (except DC37S364TLF, which does not specify flammability rating).

Frequently Asked Questions (FAQ)

Q: Can D37S24A4GX00LF replace L77DCF37SOL2 in a 7.5A application?

A: D37S24A4GX00LF is rated for 5A per contact, which is lower than the 7.5A rating of L77DCF37SOL2. This part is suitable for applications requiring 5A or less. For applications requiring the full 7.5A current capacity, the L77DCF37SOL2 must be retained.

Q: What is the difference between D37S24A4GX00LF and D37S24A4PL00LF?

A: Both parts are functionally equivalent with identical electrical and thermal specifications. The primary difference is the flange feature: D37S24A4GX00LF includes a 4-40 threaded housing, while D37S24A4PL00LF features an M3 threaded housing. Selection depends on the mechanical mounting interface of the application.

Q: Are NorComp 172-E37 parts suitable for all applications using L77DCF37SOL2?

A: NorComp 172-E37 parts have a narrower operating temperature range (-50°C to 100°C) compared to L77DCF37SOL2 (-55°C to 125°C). These parts are suitable only for applications operating within the -50°C to 100°C window. Additionally, voltage rating is not specified for these parts. Confirm application requirements before substitution.

Q: Why is the current rating different between L77DCF37SOL2 and substitute parts?

A: Current rating differences reflect design variations in contact material, contact geometry, and thermal management. L77DCF37SOL2 is rated for 7.5A, while most substitutes are rated for 5A per contact. Substitute parts with lower current ratings are suitable for applications requiring 5A or less. For higher current applications, the original part must be retained.

Q: Can A-DF 37 PP/Z be used in place of L77DCF37SOL2?

A: A-DF 37 PP/Z has significant limitations: current rating of 3A (versus 7.5A), voltage rating of 250V (versus 300V), and narrower operating temperature range (-20°C to 105°C versus -55°C to 125°C). This part is suitable only for low-current, low-voltage applications. Confirm all electrical and thermal requirements before substitution.

Q: What is the difference between Tin Plated and Nickel Plated shell finishes?

A: Shell material finish affects corrosion resistance and environmental performance. Tin Plated finishes (L77DCF37SOL2, A-DF 37 PP/Z, DC37S364TLF) provide good solderability and corrosion resistance. Nickel Plated finishes (NorComp 172-E series) provide enhanced corrosion resistance in harsh environments. Both finishes are acceptable for standard industrial applications. Selection depends on environmental exposure requirements.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry RoHS compliance certification. L77DCF37SOL2, D37S24A4PL00LF, and DC37S364TLF are RoHS Compliant. D37S24A4GX00LF, 172-E37-213R001, 172-E37-213R011, and A-DF 37 PP/Z are ROHS3 Compliant. Both RoHS and ROHS3 designations indicate compliance with RoHS directives.

Q: What does "Housing/Shell (Unthreaded)" mean compared to "Housing/Shell (4-40)"?

A: Flange feature designation indicates the mechanical mounting interface. "Housing/Shell (Unthreaded)" provides a smooth flange without threaded holes, suitable for press-fit or snap-in mounting. "Housing/Shell (4-40)" includes 4-40 threaded holes for screw-mounted installation. "Housing/Shell (M3)" includes M3 threaded holes for metric screw mounting. Selection depends on the mechanical mounting design of the application.

Q: Can substitute parts with Panel Mount capability be used in Through Hole applications?

A: NorComp 172-E37 parts support both Panel Mount and Through Hole mounting. These parts can be used in Through Hole applications. However, the panel mount feature may not be utilized in through-hole designs. Confirm mechanical compatibility with the application's PCB layout and mounting structure.

Q: What is the significance of contact finish thickness (8.00µin versus Flash)?

A: Contact finish thickness affects contact durability and mating cycle life. L77DCF37SOL2 specifies 8.00µin (0.203µm) gold plating, providing a defined thickness specification. Substitute parts with "Flash" gold finish have minimal, unspecified plating thickness. Both finishes provide adequate electrical conductivity for signal applications. For high-cycle mating applications, the specified 8.00µin thickness may provide longer contact life.