QFSS-064-04.25-L-D-DP Equivalent & Substitute Parts

Part Overview

The QFSS-064-04.25-L-D-DP is a 128-position differential pair array connector manufactured by Samtec Inc. in the Q2™ QFSS series. This surface mount connector features a 0.025" (0.64mm) pitch, dual-row configuration with shielding and ground bus plane integration. The connector is designed for high-density interconnect applications requiring differential signaling capabilities. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

QFSS-064-04.25-L-D-DP

Samtec Inc.In Stock: 920QFSS-064-04.25-L-D-DP Datasheet

Current PartRFQ

QFSS-064-04.25-L-D-DP-A

Samtec Inc.In Stock: 812QFSS-064-04.25-L-D-DP-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QFSS-064-04.25-L-D-DP is determined by strict equivalence across the following critical parameters:

• Connector Type & Configuration: Differential Pair Array, Female, 128 positions, 2 rows
• Pitch & Spacing: 0.025" (0.64mm) pitch
• Mounting Technology: Surface Mount
• Electrical & Mechanical Features: Board Guide, Ground Bus (Plane), Shielded configuration
• Contact Properties: Gold finish at 10.0µin (0.25µm) thickness
• Physical Dimensions: Height above board 0.278" (7.06mm), mated stacking height 11mm
• Compliance & Certifications: ROHS3 Compliant, MSL 1 (Unlimited)
• Series Designation: Q2™ QFSS series

Substitute parts must maintain identical specifications across all parameters listed above. Parts are grouped as direct parametric equivalents when all electrical, mechanical, and compliance attributes match the main part number.

Parameter Comparison

Engineering Selection Recommendations

Both the QFSS-064-04.25-L-D-DP and QFSS-064-04.25-L-D-DP-A are active products with identical electrical, mechanical, and compliance specifications. Selection between these parts may be based on inventory availability and procurement lead times. The QFSS-064-04.25-L-D-DP maintains 889 pieces in stock, while the QFSS-064-04.25-L-D-DP-A has 758 pieces available. Both parts carry ROHS3 compliance and EAR99 export classification. The QFSS-064-04.25-L-D-DP-A includes documented REACH Unaffected status. For applications requiring regulatory documentation or supply chain redundancy, either part is suitable for direct substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can QFSS-064-04.25-L-D-DP-A be used as a direct replacement for QFSS-064-04.25-L-D-DP?

A: Yes. Both parts are parametric equivalents with identical connector type, position count, pitch, mounting configuration, contact finish, shielding features, and physical dimensions. No PCB layout or design changes are required.

Q: Are there any differences in compliance or certifications between these parts?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) rating and EAR99 export classification. The QFSS-064-04.25-L-D-DP-A includes explicit REACH Unaffected documentation. Both carry identical HTSUS classification (8536.69.4040).

Q: What determines substitution eligibility for this connector series?

A: Substitution is based on strict equivalence across connector type (Differential Pair Array, Female), position count (128), pitch (0.025"), row configuration (2 rows), mounting type (Surface Mount), contact finish (Gold, 10.0µin), shielding and ground bus features, physical height specifications, and compliance certifications.

Q: Can parts from different manufacturers substitute for the QFSS-064-04.25-L-D-DP?

A: Substitution eligibility is limited to parts within the Samtec Inc. Q2™ QFSS series that maintain identical electrical and mechanical parameters. Cross-manufacturer substitution requires verification of equivalent specifications across all critical parameters.

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

A: The "-A" suffix indicates a variant within the same base product (QFSS-064). Both the main part and the "-A" variant maintain identical functional and physical specifications, with the suffix typically denoting a manufacturing or packaging revision.