QFSS-026-04.25-L-D Equivalent & Substitute Parts

Part Overview

The QFSS-026-04.25-L-D is a 52-position rectangular connector receptacle manufactured by Samtec Inc. as part of the Q2™ QFSS series. This surface mount connector features center strip contacts with gold plating, board guide, ground bus plane, and shielding. The component is actively produced and maintains ROHS3 compliance with MSL 1 rating. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same connector series and specifications.

Substiute Parts

QFSS-026-04.25-L-D

Samtec Inc.In Stock: 1048QFSS-026-04.25-L-D Datasheet

Current PartRFQ

QFSS-026-04.25-L-D-A

Samtec Inc.In Stock: 976QFSS-026-04.25-L-D-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QFSS-026-04.25-L-D are identified based on strict equivalence across the following critical parameters:

• Number of positions: 52
• Pitch spacing: 0.025" (0.64mm)
• Number of rows: 2
• Connector type: Receptacle, Center Strip Contacts
• Mounting type: Surface Mount
• Contact finish: Gold at 10.0µin (0.25µm) thickness
• Features: Board Guide, Ground Bus (Plane), Shielded
• Height above board: 0.278" (7.06mm)
• Mated stacking height: 11mm
• Series: Q2™ QFSS
• RoHS compliance: ROHS3 Compliant
• MSL rating: 1 (Unlimited)

Parts meeting all these parameters are classified as parametric equivalents within the same connector series and are suitable for direct substitution in applications requiring identical electrical and mechanical interface characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the QFSS-026-04.25-L-D and QFSS-026-04.25-L-D-A maintain active product status with full ROHS3 compliance and identical MSL 1 ratings. The parts are functionally equivalent across all specified electrical and mechanical parameters. Selection between these parts may be based on inventory availability, lead time, or procurement requirements, as both components satisfy identical interface specifications for the Q2™ QFSS 52-position connector series.

Frequently Asked Questions (FAQ)

Q: What determines if a part is a valid substitute for the QFSS-026-04.25-L-D?

A: A substitute must maintain identical specifications across all critical parameters: 52 positions, 0.025" pitch, 2-row configuration, surface mount receptacle with center strip contacts, gold contact finish at 10.0µin thickness, board guide, ground bus plane, shielding, 0.278" height above board, 11mm mated stacking height, Q2™ QFSS series designation, ROHS3 compliance, and MSL 1 rating.

Q: Are the QFSS-026-04.25-L-D and QFSS-026-04.25-L-D-A mechanically interchangeable?

A: Yes. Both parts share identical mechanical dimensions, mounting footprint, height specifications, and connector interface geometry. They are suitable for direct substitution in PCB designs.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the QFSS-026-04.25-L-D and QFSS-026-04.25-L-D-A are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings and EAR99 export classification.

Q: What is the significance of the "-A" suffix in the part number?

A: The "-A" suffix indicates a variant designation within the same connector series. Both parts maintain identical electrical and mechanical specifications and are parametric equivalents.

Q: Can these connectors be used in high-reliability applications?

A: Both parts are manufactured by Samtec Inc. with active product status, ROHS3 compliance, and MSL 1 rating. Application suitability depends on specific system requirements and should be evaluated against detailed design specifications.