L177DFCF37S D-Sub 37 Position Panel Mount Receptacle Connector

Part Overview

The L177DFCF37S is a 37 position D-Sub receptacle connector manufactured by Amphenol ICC (Commercial Products). This connector features female sockets configured for panel mount installation with solder cup termination. The part is currently in active product status with 805 units available in inventory.

Substitute parts become necessary when the primary component reaches end-of-life status, experiences supply chain constraints, or when design requirements permit alternative manufacturers meeting equivalent electrical and mechanical specifications. The NorComp Inc. 172-037-202R001 is identified as a functional substitute, though it carries obsolete product status and presents specific parameter variations that require engineering evaluation.

Substiute Parts

L177DFCF37S

Amphenol ICC (Commercial Products)In Stock: 862L177DFCF37S Datasheet

Current PartRFQ

172-037-202R001

NorComp Inc.In Stock: 933172-037-202R001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L177DFCF37S is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector Style: D-Sub
• Connector Type: Receptacle, Female Sockets
• Number of Positions: 37
• Number of Rows: 2
• Shell Size, Connector Layout: 4 (DC, C)
• Mounting Type: Panel Mount
• Termination: Solder Cup
• Shell Material, Finish: Steel, Tin Plated
• Contact Finish: Gold
• Flange Feature: Housing/Shell (Unthreaded)
• Contact Form: Machined
• Material Flammability Rating: UL94 V-0

The NorComp Inc. 172-037-202R001 satisfies all mandatory matching parameters. However, variations exist in current rating, voltage rating, operating temperature range, contact finish thickness, dielectric material composition, contact material, and product status. These variations must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L177DFCF37S (Amphenol ICC)

The L177DFCF37S is the recommended component for new designs and ongoing production. This part maintains active product status, ensuring long-term availability and manufacturer support. The connector meets RoHS compliance requirements and provides a current rating of 7.5A with a voltage rating of 300V. The operating temperature range of -55°C to 125°C accommodates extended environmental conditions. Contact finish thickness of 30.0µin (0.76µm) provides specified durability for repeated mating cycles.

Substitute Selection: 172-037-202R001 (NorComp Inc.)

The 172-037-202R001 is electrically and mechanically compatible for applications where the following conditions are satisfied:

• Maximum current requirement does not exceed 5A
• Operating temperature range remains within -50°C to 100°C
• Voltage rating requirement is not specified or is less than 300V
• Contact finish thickness tolerance permits flash gold plating
• Dielectric material composition change from thermoplastic to PBT does not affect application performance
• Contact material change from copper alloy to brass is acceptable for the application
• Connector color variation from black to beige is acceptable
• Packaging format change from bag to tray is compatible with assembly processes

The obsolete product status of the 172-037-202R001 restricts its use to legacy system maintenance or applications where existing inventory is available. ROHS3 compliance status is maintained.

Frequently Asked Questions (FAQ)

Q: Can the 172-037-202R001 be used as a direct replacement for the L177DFCF37S in all applications?

A: No. The 172-037-202R001 has a lower current rating (5A versus 7.5A) and reduced operating temperature range (-50°C to 100°C versus -55°C to 125°C). Applications requiring the full current or temperature specifications of the L177DFCF37S cannot use the substitute without design modification.

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

A: The L177DFCF37S specifies 30.0µin (0.76µm) gold plating thickness, while the 172-037-202R001 uses flash gold plating. Flash plating provides minimal thickness for corrosion protection but may result in different wear characteristics during repeated mating cycles. Application requirements for contact durability determine acceptability.

Q: Are the dielectric materials functionally equivalent?

A: Both materials are glass-filled polymers with UL94 V-0 flammability ratings. The L177DFCF37S uses thermoplastic while the 172-037-202R001 uses polybutylene terephthalate (PBT). Both materials meet the same flammability standard. Functional equivalence depends on specific application requirements for dielectric strength, moisture absorption, and thermal stability within the respective operating temperature ranges.

Q: Why is the 172-037-202R001 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but long-term supply cannot be guaranteed. New designs should not incorporate obsolete components.

Q: Does the packaging format difference affect compatibility?

A: The L177DFCF37S is supplied in bag packaging while the 172-037-202R001 is supplied in tray packaging. This difference affects handling and assembly processes but does not affect electrical or mechanical compatibility. Assembly equipment compatibility with tray packaging must be verified.

Q: Are both connectors RoHS compliant?

A: Yes. The L177DFCF37S is RoHS Compliant and the 172-037-202R001 is ROHS3 Compliant. Both meet current regulatory requirements for restricted substance elimination.

Q: What is the impact of the contact material difference?

A: The L177DFCF37S uses copper alloy contacts while the 172-037-202R001 uses brass contacts. Both materials provide adequate electrical conductivity and are suitable for signal-level applications. Contact resistance characteristics may differ slightly, but both materials are standard for D-Sub connectors in this configuration.