L177DFC37S D-Sub 37 Position Panel Mount Receptacle Connector

Part Overview

The L177DFC37S 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 885 units available in inventory.

The L177DFC37S serves as a standard interface connector for applications requiring 37-position signal transmission. Equivalent and substitute parts become necessary when addressing supply chain constraints, manufacturing discontinuations, or specific application requirements that align with alternative connector specifications within the same electrical and mechanical parameter range.

Substiute Parts

L177DFC37S

Amphenol ICC (Commercial Products)In Stock: 942L177DFC37S Datasheet

Current PartRFQ

172-037-202R001

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L177DFC37S is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Connector type: Receptacle, Female Sockets
• Number of positions: 37
• Number of rows: 2
• Shell size and connector layout: 4 (DC, C)
• Mounting type: Panel Mount
• Termination method: Solder Cup
• Contact form: Machined
• Flange feature: Housing/Shell (Unthreaded)

Acceptable Variation Parameters:

• Voltage rating: Substitute must meet or exceed 300V
• Current rating: Substitute must meet or exceed 7.5A
• Operating temperature range: Substitute must encompass or exceed -55°C ~ 125°C
• Contact finish thickness: Acceptable variations include Flash or specified thickness
• Shell material finish: Steel with tin plating acceptable
• Contact material: Copper Alloy or Brass acceptable
• Dielectric material: Thermoplastic glass-filled or PBT glass-filled acceptable
• RoHS compliance: RoHS Compliant or ROHS3 Compliant acceptable

The substitute part 172-037-202R001 from NorComp Inc. meets the critical matching parameters but exhibits variations in current rating (5A versus 7.5A), voltage rating (not specified versus 300V), and operating temperature range (-50°C ~ 100°C versus -55°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: L177DFC37S

The L177DFC37S is the recommended primary component selection. This part maintains active product status with established manufacturing support and full compliance with RoHS standards. The connector delivers a current rating of 7.5A and voltage rating of 300V with an operating temperature range of -55°C ~ 125°C, providing operational margin for demanding applications.

Substitute Selection: 172-037-202R001

The 172-037-202R001 from NorComp Inc. is classified as obsolete and presents parameter limitations relative to the primary part. The current rating of 5A falls below the L177DFC37S specification of 7.5A. The operating temperature range of -50°C ~ 100°C is narrower than the primary part's -55°C ~ 125°C range. The voltage rating is not specified for this substitute part.

Selection of the 172-037-202R001 is appropriate only for applications where the reduced current rating (5A maximum), narrower temperature operating range (-50°C ~ 100°C), and unspecified voltage rating align with actual system requirements. The obsolete product status indicates discontinued manufacturing and limited future availability.

Both parts maintain mechanical and electrical compatibility through matching connector type, position count, shell size, mounting configuration, and termination method. Both parts comply with RoHS environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the 172-037-202R001 directly replace the L177DFC37S in all applications?

A: Direct replacement is limited to applications where the current requirement does not exceed 5A, the operating temperature range remains within -50°C ~ 100°C, and the voltage requirement does not exceed the unspecified rating of the substitute part. The L177DFC37S provides higher current capacity (7.5A) and wider temperature range (-55°C ~ 125°C), making it suitable for a broader range of applications.

Q: What are the mechanical compatibility factors between these connectors?

A: Both connectors share identical mechanical specifications: 37 positions arranged in 2 rows, shell size 4 (DC, C) configuration, panel mount installation, solder cup termination, and machined contact form. Physical installation and PCB layout compatibility is maintained between the two parts.

Q: How do the dielectric materials differ between these parts?

A: The L177DFC37S uses thermoplastic glass-filled dielectric material, while the 172-037-202R001 uses polybutylene terephthalate (PBT) glass-filled material. Both materials are glass-filled polymers suitable for D-Sub connector applications. The specific material selection may influence thermal and mechanical properties within their respective operating ranges.

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

A: The L177DFC37S specifies gold contact finish at 30.0µin (0.76µm) thickness, while the 172-037-202R001 specifies flash gold plating. Flash plating provides minimal gold coverage for corrosion protection, while the thicker 30.0µin specification on the L177DFC37S offers enhanced durability and contact reliability over extended operational life.

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

A: Obsolete product status indicates that NorComp Inc. has discontinued manufacturing of the 172-037-202R001. While inventory may remain available through existing stock channels, future procurement cannot be guaranteed. The L177DFC37S maintains active status with ongoing manufacturing support.

Q: Are there packaging differences that affect component handling?

A: The L177DFC37S is supplied in bag packaging, while the 172-037-202R001 is supplied in tray packaging. Tray packaging provides enhanced protection during storage and transportation. Both packaging formats are suitable for standard component handling and storage procedures.

Q: What compliance certifications apply to both connectors?

A: Both connectors comply with RoHS environmental standards. The L177DFC37S is RoHS Compliant, while the 172-037-202R001 is ROHS3 Compliant. Both parts carry UL94 V-0 material flammability rating. Both are classified under ECCN EAR99 for export control purposes.