172-E37-112-021 D-Sub Plug Connector Equivalent & Substitute Parts

Part Overview

The 172-E37-112-021 is a 37-position D-Sub plug connector with male pins, designed for panel mount through-hole solder termination applications. Manufactured by NorComp Inc., this connector features a steel tin-plated shell, gold-flashed contacts, and operates across -50°C to 100°C. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where this connector type is specified.

Substiute Parts

172-E37-112-021

NorComp Inc.In Stock: 845172-E37-112-021 Datasheet

Current PartRFQ

172-E37-113R021

NorComp Inc.In Stock: 988172-E37-113R021 Datasheet

DirectRFQ

627-037-220-047

Mercury United Electronics, Inc.In Stock: 996627-037-220-047 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 172-E37-112-021 is determined by strict equivalence across the following critical parameters:

• Connector style (D-Sub) and type (Plug, Male Pins)
• Position count (37) and row configuration (2)
• Shell size and layout (4, DC, C)
• Mounting method (Panel Mount, Through Hole)
• Termination type (Solder)
• Contact type (Signal) and flange feature (Board Side, 4-40)
• Material flammability rating (UL94 V-0)
• Current rating capability (5A minimum)
• Operating temperature range compatibility

The substitute parts identified maintain these core electrical and mechanical parameters while differing in shell finish material, dielectric composition, contact material specifications, and compliance certifications. These differences do not affect functional interchangeability in applications where the 172-E37-112-021 was originally specified.

Parameter Comparison

Engineering Selection Recommendations

The 172-E37-113R021 is the primary direct substitute for the obsolete 172-E37-112-021. Both parts are manufactured by NorComp Inc., share identical electrical and mechanical specifications, and maintain the same operating temperature range. The 172-E37-113R021 is currently in active production status with superior inventory availability. This part achieves ROHS3 compliance, addressing regulatory requirements that the original part does not meet. The dielectric material differs (PA6T versus PBT), but both materials satisfy UL94 V-0 flammability requirements.

The 627-037-220-047 from Mercury United Electronics, Inc. provides an alternative cross-manufacturer substitute. This part maintains core D-Sub 37-position specifications and solder termination compatibility. However, the current rating is specified at 3A per contact, which is lower than the 5A rating of the primary part. The operating temperature range is also reduced to -55°C to 85°C. This part includes additional features (Board Lock, Shielded) and is available in black color versus white. The 627-037-220-047 is suitable for applications where the reduced current and temperature specifications are acceptable and where shielding is beneficial.

For new designs or systems requiring full parameter equivalence with the original 172-E37-112-021, the 172-E37-113R021 is the recommended selection. For applications where current and temperature derating are acceptable, the 627-037-220-047 offers cross-manufacturer availability.

Frequently Asked Questions (FAQ)

Q: Can the 172-E37-113R021 directly replace the 172-E37-112-021 in existing assemblies?

A: Yes. Both connectors maintain identical position count (37), row configuration (2), shell size (4, DC, C), mounting type (Panel Mount, Through Hole), solder termination, and operating temperature range (-50°C to 100°C). The 172-E37-113R021 is electrically and mechanically interchangeable with the obsolete 172-E37-112-021.

Q: What are the differences between the 172-E37-113R021 and 627-037-220-047?

A: Both are 37-position D-Sub plug connectors with solder termination. Key differences include: manufacturer (NorComp vs. Mercury), current rating (5A vs. 3A per contact), operating temperature range (-50°C to 100°C vs. -55°C to 85°C), shell finish (Nickel vs. Nickel), dielectric material (PA6T vs. Polyester), and additional features on the Mercury part (Board Lock, Shielded). The Mercury part is available in black; the NorComp part is white.

Q: Is the 627-037-220-047 suitable for applications requiring 5A current rating?

A: No. The 627-037-220-047 is rated at 3A per contact, which is below the 5A specification of the original 172-E37-112-021. Applications requiring 5A current capacity should use the 172-E37-113R021.

Q: What is the impact of different dielectric materials on substitution?

A: The original 172-E37-112-021 uses PBT (Polybutylene Terephthalate) glass-filled dielectric. The 172-E37-113R021 uses PA6T (Polyamide, Nylon 6T), and the 627-037-220-047 uses Polyester Thermoplastic. All three materials meet UL94 V-0 flammability requirements. Dielectric material differences do not affect functional interchangeability for signal-level D-Sub applications.

Q: Are there RoHS compliance considerations for substitution?

A: The original 172-E37-112-021 is RoHS non-compliant. Both substitute parts (172-E37-113R021 and 627-037-220-047) are ROHS3 compliant. For applications subject to RoHS regulations, either substitute part addresses compliance requirements.

Q: What packaging formats are available for these substitute parts?

A: The 172-E37-113R021 is supplied in Tray packaging. The 627-037-220-047 is supplied in Tube packaging. Packaging selection may affect handling, storage, and integration into automated assembly processes.