QMSS-026-01-H-D-EM2 Equivalent & Substitute Parts

Part Overview

The QMSS-026-01-H-D-EM2 is a 52-position connector header manufactured by Samtec Inc. within the Q2™ QMSS 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 with 992 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the connector family, enabling component procurement flexibility while preserving circuit board compatibility.

Substiute Parts

QMSS-026-01-H-D-EM2

Samtec Inc.In Stock: 1094QMSS-026-01-H-D-EM2 Datasheet

Current PartRFQ

QMSS-026-06.75-H-D-A-GP

Samtec Inc.In Stock: 1320QMSS-026-06.75-H-D-A-GP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts within the QMSS-026 family are qualified based on the following critical parameters that must remain constant:

• 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: 30.0µin (0.76µm)
• Height above board: 0.265" (6.73mm)
• Mated stacking heights: 11mm
• Features: Board Guide, Ground Bus (Plane), Shielded
• Series: Q2™ QMSS
• RoHS Status: ROHS3 Compliant
• MSL: 1 (Unlimited)

Variations in base product configuration codes (such as mated height specifications) do not affect electrical or mechanical compatibility when all core parameters remain aligned. The QMSS-026-06.75-H-D-A-GP maintains full parametric equivalence with the primary part number.

Parameter Comparison

Engineering Selection Recommendations

Both the QMSS-026-01-H-D-EM2 and QMSS-026-06.75-H-D-A-GP are active production parts with full ROHS3 compliance and unlimited moisture sensitivity rating. Selection between these parts is based on inventory availability and procurement lead time requirements. The QMSS-026-06.75-H-D-A-GP currently maintains higher stock levels at 1228 units compared to 992 units for the primary part number. Both parts carry identical electrical and mechanical specifications, ensuring direct interchangeability in circuit board designs. Compliance certifications (ROHS3, EAR99 ECCN classification, and HTSUS coding) are equivalent across both part numbers.

Frequently Asked Questions (FAQ)

Q: Are QMSS-026-01-H-D-EM2 and QMSS-026-06.75-H-D-A-GP electrically identical?

A: Yes. Both parts maintain identical electrical specifications including 52 positions, 0.025" pitch, gold contact finish at 30.0µin thickness, and shielded configuration with ground bus plane.

Q: Can these parts be used interchangeably on the same circuit board?

A: Yes. The parts share identical mechanical dimensions, mounting type (surface mount), height above board (0.265"), and mated stacking height (11mm), enabling direct substitution without board redesign.

Q: What is the difference between these two part numbers?

A: The part numbers reflect different configuration codes within the QMSS-026 base product family. All core electrical and mechanical parameters remain constant. Differences are limited to internal manufacturing or packaging designations that do not affect circuit board compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both QMSS-026-01-H-D-EM2 and QMSS-026-06.75-H-D-A-GP are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection should be based on current inventory availability and procurement timelines. Both parts are active production items with equivalent compliance and performance characteristics.