L77DC37SOL2VF 37-Position D-Sub Receptacle Equivalent & Substitute Parts

Part Overview

The L77DC37SOL2VF is a 37-position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This through-hole solder-terminated connector features female sockets in a vertical orientation with a mating-side female screwlock flange. The connector is classified as Active product status with 1106 pieces currently in stock.

D-Sub receptacle connectors are essential interface components in industrial, telecommunications, and legacy computing applications. Equivalent and substitute parts are identified when original inventory is unavailable, when alternative mounting configurations are required, or when design specifications permit functional alternatives within defined electrical and mechanical parameters.

Substiute Parts

L77DC37SOL2VF

Amphenol ICC (Commercial Products)In Stock: 1148L77DC37SOL2VF 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

Substitute parts for the L77DC37SOL2VF are identified based on strict electrical and mechanical compatibility criteria. The following parameters must align for functional substitution:

Critical Matching Parameters:

• Connector Type: Receptacle, Female Sockets (mandatory)
• Number of Positions: 37 (mandatory)
• Shell Size / Layout: 4 (DC, C) (mandatory)
• Termination: Solder (mandatory)
• Voltage Rating: 300V or higher (mandatory)
• Operating Temperature Range: Must encompass or exceed -55°C ~ 125°C (mandatory)
• Material Flammability Rating: UL94 V-0 (mandatory)

Allowable Variation Parameters:

• Mounting Type: Through Hole variants with different flange configurations
• Current Rating: Acceptable if rated at or above 5A per contact
• Shell Material Finish: Steel with alternative plating (Tin, Nickel, Tin-Nickel)
• Contact Material: Brass or Phosphor Bronze
• Dielectric Material: Thermoplastic variants (Glass Filled, Nylon 6T, PBT)
• Flange Feature: Mating-side, board-side, or unthreaded housing configurations

Non-Substitutable Parameters:

• Connector Style: D-Sub (fixed)
• Number of Rows: 2 (fixed)
• Contact Type: Signal (fixed)

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Electrical & Thermal Equivalents:

DC37S364TLF (Amphenol ICC) and D37S24A4GX00LF (Amphenol ICC) are the primary substitutes. Both maintain the full operating temperature range (-55°C ~ 125°C) and 300V voltage rating. DC37S364TLF provides identical current rating capability (5A per contact minimum). D37S24A4GX00LF offers enhanced current rating (5A per contact) with Board Lock feature and Tin-Nickel plating for improved corrosion resistance. Both are RoHS Compliant or ROHS3 Compliant with UL94 V-0 flammability rating.

Tier 2 - Functional Substitutes with Temperature Derating:

172-E37-213R001 and 172-E37-213R011 (NorComp Inc.) are functionally equivalent for applications operating within -50°C ~ 100°C. These parts feature panel mount capability with alternative flange configurations (unthreaded housing or board-side 4-40). Current rating is 5A. ROHS3 Compliant status and UL94 V-0 rating are maintained. Voltage rating is not specified; applications requiring 300V operation should confirm compatibility with NorComp technical documentation.

Tier 3 - Limited Substitution:

A-DF 37 PP/Z (Assmann WSW Components) is suitable only for applications with reduced current requirements (3A maximum) and operating temperatures within -20°C ~ 105°C. Voltage rating is 250V, which is below the 300V specification of the main part. This substitute is appropriate for legacy or non-critical signal applications only.

Compliance & Certification:

All recommended substitutes maintain UL94 V-0 material flammability rating and RoHS or ROHS3 compliance. D37S24A4GX00LF carries REACH Affected status; applications subject to REACH regulations should confirm material declarations. All parts are classified as Active product status with adequate inventory availability.

Frequently Asked Questions (FAQ)

Q1: Can DC37S364TLF replace L77DC37SOL2VF in all applications?

DC37S364TLF is electrically and thermally equivalent. Both operate at -55°C ~ 125°C and 300V. The primary difference is flange configuration: DC37S364TLF features an unthreaded housing shell, while L77DC37SOL2VF has a mating-side female screwlock (4-40). Mechanical compatibility depends on PCB layout and mating connector design. Verify flange mounting requirements before substitution.

Q2: What is the difference between 172-E37-213R001 and 172-E37-213R011?

Both are NorComp 37-position D-Sub receptacles with identical electrical specifications (5A, -50°C ~ 100°C). The distinction is flange configuration: 172-E37-213R001 has an unthreaded housing shell, while 172-E37-213R011 has a board-side 4-40 flange. Select based on PCB mounting hole pattern and mechanical interface requirements.

Q3: Why is A-DF 37 PP/Z listed as a substitute if it has lower current and voltage ratings?

A-DF 37 PP/Z is included as a Tier 3 substitute for applications with relaxed electrical requirements. The 3A current rating and 250V voltage specification are below the main part's 7.5A and 300V ratings. This part is suitable only for legacy systems, low-power signal applications, or designs where reduced electrical performance is acceptable. Do not use in high-current or high-voltage applications.

Q4: Are NorComp parts suitable for high-temperature applications?

NorComp 172-E37 series parts operate to 100°C maximum, which is 25°C below the L77DC37SOL2VF specification of 125°C. These parts are not suitable for applications requiring the full -55°C ~ 125°C temperature range. Use NorComp substitutes only when application operating temperature does not exceed 100°C.

Q5: What does "Panel Mount" mean for 172-E37 series connectors?

Panel Mount indicates the connector is designed for installation through a panel or enclosure wall with the flange positioned on the panel surface. This differs from the L77DC37SOL2VF, which is optimized for vertical PCB mounting. Panel mount variants are appropriate for rear-panel or bulkhead installations where the connector mounts perpendicular to the PCB.

Q6: Does contact finish thickness affect substitution compatibility?

L77DC37SOL2VF specifies 8.00µin (0.203µm) gold contact finish thickness, while most substitutes specify "Flash" thickness. Flash plating is thinner but provides adequate contact resistance and wear characteristics for standard signal applications. Substitution is acceptable for general-purpose use. Applications requiring specific contact resistance or extended mating cycle life should confirm flash thickness specifications with the manufacturer.

Q7: What is the significance of RoHS Compliant versus ROHS3 Compliant status?

RoHS Compliant indicates compliance with the original Restriction of Hazardous Substances Directive. ROHS3 Compliant indicates compliance with the updated directive including additional restricted substances. Both statuses are acceptable for most applications. ROHS3 Compliant parts (D37S24A4GX00LF, 172-E37 series, A-DF 37 PP/Z) meet current regulatory requirements in the European Union and other regions adopting ROHS3 standards.

Q8: Can I use D37S24A4PL00LF if my application requires M3 mounting holes?

D37S24A4PL00LF features an M3 flange, which differs from the L77DC37SOL2VF (4-40 female screwlock). If your PCB or mounting structure has M3 threaded holes, D37S24A4PL00LF is mechanically compatible. Verify that the M3 thread pitch and depth accommodate the connector flange. Electrical specifications (5A per contact, 300V, -55°C ~ 125°C) are equivalent to the main part.

Q9: What is the "Board Lock" feature on D37S24A4GX00LF?

Board Lock is a mechanical feature that provides positive retention of the connector to the PCB, preventing accidental disconnection during handling or vibration. This feature enhances mechanical reliability in applications subject to shock or vibration. If your application requires positive board retention, D37S24A4GX00LF is preferred over alternatives without this feature.

Q10: Are all substitute parts available in the same packaging as L77DC37SOL2VF?

All listed substitutes are packaged in Tray format, matching the L77DC37SOL2VF packaging specification. Tray packaging is standard for D-Sub connectors and is suitable for automated assembly processes. Inventory quantities vary: D37S24A4GX00LF has the highest availability (1502 pcs), while D37S24A4PL00LF has the lowest (805 pcs).