QMS-026-05.75-L-D-A Equivalent & Substitute Parts

Part Overview

The QMS-026-05.75-L-D-A is a 52-position connector header manufactured by Samtec Inc. within the Power Q2™ QMS series. This surface mount rectangular connector features outer shroud contacts with gold plating and is designed for high-density interconnect applications. The part is currently active in production status and maintains full RoHS3 compliance. Substitute parts are identified to provide packaging flexibility and inventory optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

QMS-026-05.75-L-D-A

Samtec Inc.In Stock: 744QMS-026-05.75-L-D-A Datasheet

Current PartRFQ

QMS-026-05.75-L-D-A-TR

Samtec Inc.In Stock: 1531QMS-026-05.75-L-D-A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QMS-026-05.75-L-D-A is determined by strict equivalence across the following critical parameters:

• Number of positions: 52
• Pitch: 0.025" (0.64mm)
• Number of rows: 2
• Connector type: Header, Outer Shroud Contacts
• Mounting type: Surface Mount
• Contact finish: Gold
• Contact finish thickness: 10.0µin (0.25µm)
• Features: Board Guide, Ground Bus (Plane)
• Mated stacking heights: 10mm, 12mm
• Series: Power Q2™ QMS
• RoHS compliance: ROHS3 Compliant
• MSL rating: 1 (Unlimited)

The identified substitute part differs only in packaging configuration (Tape & Reel versus Tray) and minor height above board specification, which do not affect electrical or mechanical compatibility in the connector interface.

Parameter Comparison

Engineering Selection Recommendations

Both QMS-026-05.75-L-D-A and QMS-026-05.75-L-D-A-TR are active production parts with identical ROHS3 compliance and regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8536.69.4040). Selection between these parts is based on packaging and supply chain requirements rather than electrical or mechanical performance differences.

The Tray packaging (QMS-026-05.75-L-D-A) is suitable for lower-volume applications and manual assembly processes. The Tape & Reel packaging (QMS-026-05.75-L-D-A-TR) is optimized for automated pick-and-place assembly and high-volume production environments. The minor difference in height above board (0.227" versus 0.212") does not affect connector interface compatibility or mating characteristics.

Frequently Asked Questions (FAQ)

Q: Can QMS-026-05.75-L-D-A-TR be used as a direct replacement for QMS-026-05.75-L-D-A?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only. Tray packaging is replaced by Tape & Reel packaging without affecting connector performance or compatibility.

Q: What is the significance of the height above board difference between the two parts?

A: The height above board specification (0.227" for Tray versus 0.212" for Tape & Reel) reflects manufacturing process variations in packaging presentation. This difference does not affect the connector's mating interface or electrical performance.

Q: Are both parts suitable for automated assembly?

A: The Tape & Reel variant (QMS-026-05.75-L-D-A-TR) is specifically formatted for automated pick-and-place equipment. The Tray variant (QMS-026-05.75-L-D-A) is compatible with manual assembly and lower-volume processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both QMS-026-05.75-L-D-A and QMS-026-05.75-L-D-A-TR are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN EAR99, HTSUS 8536.69.4040).

Q: What is the MSL rating for these connectors?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.