L77DCH37SOL2 Equivalent & Substitute Parts

Part Overview

The L77DCH37SOL2 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 2-row configuration with shell size 4 (DC, C) layout. The connector is designed for signal applications requiring a current rating of 7.5A and operates across a temperature range of -55°C to 125°C. The part maintains Active product status and is RoHS Compliant with REACH Unaffected classification. Equivalent and substitute parts are identified based on matching connector topology, electrical ratings, and mechanical compatibility within the D-Sub receptacle category.

Substiute Parts

L77DCH37SOL2

Amphenol ICC (Commercial Products)In Stock: 859L77DCH37SOL2 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 the L77DCH37SOL2 is determined by strict equivalence in the following parameters:

Critical Matching Parameters:

• Connector Type: Receptacle, Female Sockets
• Number of Positions: 37
• Number of Rows: 2
• Shell Size, Connector Layout: 4 (DC, C)
• Termination: Solder
• Connector Style: D-Sub

Electrical Compatibility Parameters:

• Voltage Rating: 300V (minimum requirement)
• Current Rating: Substitute must support minimum 7.5A
• Operating Temperature Range: Must encompass -55°C to 125°C

Mechanical Compatibility Parameters:

• Mounting Type: Through Hole (primary requirement)
• Contact Type: Signal
• Material Flammability Rating: UL94 V-0

Substitute parts identified in this reference maintain these core parameters while allowing variations in shell finish, contact material composition, flange feature design, and dielectric material formulation. Variations in these secondary parameters do not affect functional interchangeability within the D-Sub receptacle category.

Parameter Comparison

Engineering Selection Recommendations

Full Equivalents (Recommended Primary Substitutes):

The D37S24A4GX00LF and D37S24A4PL00LF from Amphenol ICC (FCI) Delta D series provide the closest electrical and thermal equivalence to the L77DCH37SOL2. Both parts maintain the full operating temperature range of -55°C to 125°C, 300V voltage rating, and support 5A per contact current capacity. Both maintain RoHS compliance and Active product status. The D37S24A4GX00LF features a 4-40 board-side flange with Board Lock feature, while D37S24A4PL00LF provides an M3 flange option. These parts are suitable for direct substitution in applications where the original mounting configuration is compatible.

Conditional Substitutes (Limited Application):

The DC37S364TLF from Amphenol ICC (FCI) D series maintains the 300V voltage rating and -55°C to 125°C operating range with 5A per contact rating. This part is suitable for applications where the unthreaded housing flange is acceptable. Material flammability rating is not specified for this part.

The 172-E37-213R001 and 172-E37-213R011 from NorComp Inc. provide panel mount through-hole options with 5A current rating. These parts operate within -50°C to 100°C range, which is narrower than the original specification. Voltage rating is not specified. These parts are suitable only for applications where the reduced temperature range and unspecified voltage rating are acceptable.

Not Recommended for Direct Substitution:

The A-DF 37 PP/Z from Assmann WSW Components operates at only 3A current rating and -20°C to 105°C temperature range, both of which fall below the L77DCH37SOL2 specifications. This part is not suitable for applications requiring the full electrical and thermal performance of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 172-E37-213R001 or 172-E37-213R011 be used as direct replacements for the L77DCH37SOL2?

A: These NorComp parts are mechanically compatible as 37-position D-Sub receptacles with solder termination. However, they operate within a reduced temperature range of -50°C to 100°C compared to the original -55°C to 125°C specification. Voltage rating is not specified for these parts. Use is limited to applications where the narrower operating temperature range is acceptable.

Q: What is the difference between D37S24A4GX00LF and D37S24A4PL00LF?

A: Both parts are functionally equivalent Delta D series receptacles with identical electrical ratings (5A per contact, 300V, -55°C to 125°C). The primary difference is the flange feature: D37S24A4GX00LF provides a 4-40 board-side flange with Board Lock feature, while D37S24A4PL00LF provides an M3 flange. Selection depends on the mounting hole configuration of the target application.

Q: Why is the A-DF 37 PP/Z not recommended as a substitute?

A: The A-DF 37 PP/Z operates at 3A current rating and -20°C to 105°C temperature range. Both parameters fall below the L77DCH37SOL2 specifications of 7.5A and -55°C to 125°C. This part cannot reliably support the electrical and thermal requirements of the original component.

Q: Are all substitute parts RoHS compliant?

A: The L77DCH37SOL2, D37S24A4GX00LF, D37S24A4PL00LF, and DC37S364TLF are RoHS Compliant or ROHS3 Compliant. The 172-E37-213R001, 172-E37-213R011, and A-DF 37 PP/Z are ROHS3 Compliant. All parts maintain REACH Unaffected or REACH Affected status as specified.

Q: What mounting configurations are available among the substitute parts?

A: The L77DCH37SOL2, A-DF 37 PP/Z, D37S24A4GX00LF, D37S24A4PL00LF, and DC37S364TLF are through-hole mounted. The 172-E37-213R001 and 172-E37-213R011 provide panel mount through-hole options with board-side or unthreaded housing flanges. Selection depends on the target PCB or panel configuration.

Q: Can substitute parts with lower current ratings be used in applications requiring 7.5A?

A: No. The L77DCH37SOL2 is rated for 7.5A. Substitute parts with lower current ratings (3A, 5A per contact) cannot be used in applications requiring the full 7.5A capacity. Only D37S24A4GX00LF and D37S24A4PL00LF with 5A per contact rating approach the original specification, though they do not fully match the 7.5A rating.

Q: What is the significance of contact finish thickness specifications?

A: The L77DCH37SOL2 specifies 8.00µin (0.203µm) gold contact finish thickness. Substitute parts specify Flash thickness, which is a thinner application. Both finishes provide gold contact protection; the difference reflects manufacturing process variation between suppliers.