172-050-281-021 D-Sub Receptacle Connector Equivalent & Substitute Parts

Part Overview

The 172-050-281-021 is a 50-position D-Sub receptacle connector manufactured by NorComp Inc., featuring female sockets with panel mount, through-hole solder termination. This connector is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system maintenance and new design implementations. The connector operates across an industrial temperature range of -50°C to 100°C and carries a 5A current rating per position.

Substiute Parts

172-050-281-021

NorComp Inc.In Stock: 1044172-050-281-021 Datasheet

Current PartRFQ

172-050-283L021

NorComp Inc.In Stock: 1212172-050-283L021 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 172-050-281-021 is determined by strict equivalence across the following critical parameters:

• Connector type: Receptacle with female sockets
• Position count: 50 positions
• Row configuration: 3 rows
• Shell size and layout: Size 5 (DD, D)
• Mounting configuration: Panel mount with through-hole termination
• Current capacity: 5A per position
• Dielectric material: Polybutylene Terephthalate (PBT)
• Flange feature: Board side (4-40)
• Contact type: Signal

The substitute part 172-050-283L021 maintains full equivalence across all critical electrical and mechanical parameters. Differences in shell finish material, contact finish thickness classification, operating temperature upper limit, and product status represent secondary variations that do not affect functional interchangeability within the specified operating envelope of the original part.

Parameter Comparison

Engineering Selection Recommendations

The 172-050-283L021 serves as the direct functional equivalent for the obsolete 172-050-281-021. Selection between these parts should be based on the following criteria:

For applications requiring RoHS3 compliance, the 172-050-283L021 is the appropriate selection, as the original part does not meet current RoHS requirements. The substitute part maintains active product status, ensuring long-term availability and supply chain continuity.

The extended operating temperature range of the substitute part (-50°C to 125°C versus -50°C to 100°C) provides additional thermal margin without introducing incompatibility. The nickel-plated shell finish of the substitute replaces the yellow chromate plating of the original part; both finishes provide equivalent corrosion protection within standard industrial environments.

For legacy system maintenance where the original part specification must be preserved, the 172-050-281-021 remains available in current inventory (961 pieces). For new designs or systems undergoing modernization, the 172-050-283L021 is the recommended selection due to active status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 172-050-283L021 be used as a direct replacement for the 172-050-281-021 in existing assemblies?

A: Yes. Both connectors share identical electrical and mechanical specifications across all critical parameters: 50-position configuration, size 5 shell layout, 5A current rating, panel mount through-hole termination, and PBT dielectric material. Physical dimensions and mounting hole patterns are equivalent.

Q: What is the significance of the different shell finishes (yellow chromate versus nickel plating)?

A: Both finishes provide corrosion protection suitable for industrial environments. The nickel plating of the substitute part offers equivalent or superior performance in standard applications. Selection between finishes should be based on specific environmental exposure requirements or existing system specifications.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The substitute part's upper temperature limit of 125°C exceeds the original specification of 100°C. This represents an expansion of the operating envelope and does not introduce incompatibility. Applications operating within the original -50°C to 100°C range experience no change in performance characteristics.

Q: What is the impact of RoHS3 compliance on part selection?

A: RoHS3 compliance is a regulatory requirement for new designs and systems subject to EU directives. The substitute part meets this requirement; the original part does not. For applications requiring regulatory compliance documentation, the 172-050-283L021 must be specified.

Q: Are there packaging differences between these parts?

A: The original part is supplied without specified packaging; the substitute part is supplied in trays. This difference affects logistics and handling but does not impact electrical or mechanical performance.

Q: What is the difference between "Flash" and other contact finish thickness classifications?

A: Flash thickness represents a minimal gold plating applied to contact surfaces. Both parts specify flash thickness, ensuring equivalent contact resistance and wear characteristics.