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

Part Overview

The QFSS-026-04.25-H-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 connector maintains an active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this connector category.

Substiute Parts

QFSS-026-04.25-H-D

Samtec Inc.In Stock: 1004QFSS-026-04.25-H-D Datasheet

Current PartRFQ

QFSS-026-04.25-H-D-A

Samtec Inc.In Stock: 1106QFSS-026-04.25-H-D-A Datasheet

Parametric EquivalentRFQ

QFSS-026-04.25-H-D-A-GP

Samtec Inc.In Stock: 834QFSS-026-04.25-H-D-A-GP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QFSS-026-04.25-H-D are determined by strict equivalence across the following critical parameters:

• Number of Positions: 52
• Pitch: 0.025" (0.64mm)
• Number of Rows: 2
• Connector Type: Receptacle, Center Strip Contacts
• Mounting Type: Surface Mount
• Contact Finish: Gold
• Contact Finish Thickness: 30.0µin (0.76µm)
• Features: Board Guide, Ground Bus (Plane), Shielded
• Height Above Board: 0.278" (7.06mm)
• Mated Stacking Heights: 11mm
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts maintain identical electrical and mechanical specifications within the Q2™ QFSS series, ensuring direct functional interchangeability in surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—QFSS-026-04.25-H-D, QFSS-026-04.25-H-D-A, and QFSS-026-04.25-H-D-A-GP—are active products with ROHS3 compliance and identical electrical and mechanical specifications. Selection between these parts is based on inventory availability and procurement requirements rather than technical differentiation. QFSS-026-04.25-H-D-A offers the highest current inventory level at 1045 pieces. All parts maintain MSL 1 rating, eliminating moisture sensitivity constraints for storage and handling.

Frequently Asked Questions (FAQ)

Q: Are QFSS-026-04.25-H-D, QFSS-026-04.25-H-D-A, and QFSS-026-04.25-H-D-A-GP electrically and mechanically interchangeable?

A: Yes. All three part numbers share identical electrical and mechanical specifications, including 52 positions, 0.025" pitch, 2-row configuration, surface mount mounting, gold contact finish, shielding, and board guide features. They are direct functional equivalents within the Q2™ QFSS series.

Q: What determines substitution eligibility for this connector category?

A: Substitution is determined by equivalence across position count, pitch, row configuration, connector type, mounting method, contact finish specifications, physical dimensions, and compliance certifications. All identified substitutes maintain these parameters identically.

Q: Are there any compliance or certification differences between these part numbers?

A: No. All three parts are ROHS3 compliant, carry MSL 1 rating, and maintain active product status. QFSS-026-04.25-H-D-A and QFSS-026-04.25-H-D-A-GP include documented REACH Unaffected status.

Q: Can these connectors be used interchangeably in existing PCB designs?

A: Yes. Identical mounting type (surface mount), height above board (0.278"), mated stacking height (11mm), and all mechanical specifications ensure direct PCB layout compatibility without design modification.

Q: What is the significance of the suffix variations (-A and -A-GP) in the part numbers?

A: Suffix variations indicate internal manufacturing or packaging designations within Samtec's product line. All variants maintain identical functional and electrical specifications for end-use applications.