171-037-101L021 D-Sub Connector Equivalent & Substitute Parts

Part Overview

The 171-037-101L021 is a 37-position D-Sub plug connector with male pins, designed for panel mount applications. Manufactured by NorComp Inc., this connector features solder cup termination and is rated for 5A current at operating temperatures from -50°C to 100°C. The part is currently obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system maintenance and new designs requiring compatible interconnect solutions.

Key Parameters

Parameter	Value
Connector Style	D-Sub
Connector Type	Plug, Male Pins
Number of Positions	37
Number of Rows	2
Shell Size, Connector Layout	4 (DC, C)
Mounting Type	Panel Mount
Termination	Solder Cup
Current Rating	5A
Operating Temperature Range	-50°C to 100°C
Contact Finish	Gold Flash
Dielectric Material	Polybutylene Terephthalate (PBT), Glass Filled
Wire Gauge	20-28 AWG
Flange Feature	Cable Side (4-40)

Substitute Part Grouping Explanation

The 171-037-103L021 qualifies as a direct substitute for the 171-037-101L021 based on the following critical parameters:

Identical connector style, type, and pin configuration (37-position D-Sub plug, male pins)
Matching shell size and layout (Size 4, DC/C configuration)
Identical mounting type (panel mount) and termination method (solder cup)
Equivalent electrical ratings (5A current, -50°C to 100°C operating range)
Matching contact material and finish specifications (copper alloy with gold flash)
Identical dielectric material and wire gauge compatibility (PBT glass-filled, 20-28 AWG)
Identical flange feature specification (cable side with 4-40 mounting)

The primary differences between these parts are shell material finish (yellow chromate plated zinc versus nickel plated) and the presence of grounding indents on the substitute part. These differences do not affect electrical or mechanical compatibility in standard D-Sub applications.

Parameter Comparison

Parameter	171-037-101L021	171-037-103L021
Connector Style	D-Sub	D-Sub
Connector Type	Plug, Male Pins	Plug, Male Pins
Number of Positions	37	37
Number of Rows	2	2
Shell Size, Connector Layout	4 (DC, C)	4 (DC, C)
Mounting Type	Panel Mount	Panel Mount
Termination	Solder Cup	Solder Cup
Current Rating (Amps)	5A	5A
Operating Temperature Range	-50°C to 100°C	-50°C to 100°C
Contact Finish	Gold Flash	Gold Flash
Contact Material	Copper Alloy	Copper Alloy
Dielectric Material	Polybutylene Terephthalate (PBT), Glass Filled	Polybutylene Terephthalate (PBT), Glass Filled
Wire Gauge	20-28 AWG	20-28 AWG
Flange Feature	Cable Side (4-40)	Cable Side (4-40)
Shell Material Finish	Steel, Yellow Chromate Plated Zinc	Steel, Nickel Plated
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 171-037-103L021 is the appropriate substitute for the obsolete 171-037-101L021. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in active production with 753 units in stock, providing supply continuity for applications requiring 37-position D-Sub plug connectors with panel mount configuration and solder cup termination.

The nickel-plated shell finish of the substitute part provides equivalent corrosion resistance compared to the yellow chromate plated zinc finish of the original part. The addition of grounding indents on the substitute part enhances mechanical stability without affecting electrical performance or pin configuration compatibility.

Frequently Asked Questions (FAQ)

Q: Are the 171-037-101L021 and 171-037-103L021 mechanically interchangeable?

A: Yes. Both connectors share identical shell size (Size 4), pin count (37 positions), mounting type (panel mount), and flange specifications (cable side with 4-40 mounting). Physical dimensions and mating interfaces are equivalent.

Q: What is the difference in shell material finish between these parts?

A: The 171-037-101L021 features yellow chromate plated zinc, while the 171-037-103L021 uses nickel plating. Both finishes provide corrosion protection suitable for standard industrial environments. Selection between them depends on specific environmental exposure requirements and existing system specifications.

Q: Can the 171-037-103L021 replace the 171-037-101L021 in existing designs?

A: Yes. The substitute part maintains all critical electrical and mechanical parameters: 37-position configuration, 5A current rating, -50°C to 100°C operating range, solder cup termination, and 20-28 AWG wire gauge compatibility. No design modifications are required.

Q: What does "grounding indents" mean on the substitute part?

A: Grounding indents are mechanical features on the connector shell that enhance electrical grounding contact. This feature does not affect pin-to-pin signal integrity or compatibility with standard D-Sub receptacles.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the 171-037-101L021 and 171-037-103L021 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging is available for the substitute part?

A: The 171-037-103L021 is supplied in tray packaging, suitable for automated assembly and component handling processes.

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