QFSS-078-04.25-L-D-A-P Equivalent & Substitute Parts

Part Overview

The QFSS-078-04.25-L-D-A-P is a 156-position rectangular connector receptacle manufactured by Samtec Inc. as part of the Q2™ QFSS series. This surface mount connector features center strip contacts with shielding and gold plating, designed for high-density interconnect applications requiring board-level connectivity. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the connector specification, ensuring functional interchangeability in circuit board assembly.

Substiute Parts

QFSS-078-04.25-L-D-A-P

Samtec Inc.In Stock: 1012QFSS-078-04.25-L-D-A-P Datasheet

Current PartRFQ

QFSS-078-04.25-L-D-A

Samtec Inc.In Stock: 1048QFSS-078-04.25-L-D-A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QFSS-078-04.25-L-D-A-P is determined by strict equivalence across the following critical parameters:

• Number of Positions: 156
• Pitch: 0.025" (0.64mm)
• Number of Rows: 2
• Connector Type: Receptacle, Center Strip Contacts
• Mounting Type: Surface Mount
• Features: Board Guide, Ground Bus (Plane), Shielded
• Contact Finish: Gold
• Contact Finish Thickness: 10.0µin (0.25µm)
• Mated Stacking Height: 11mm
• Height Above Board: 0.278" (7.06mm)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all these parameters are classified as parametric equivalents and may be substituted without modification to circuit board design or assembly procedures.

Parameter Comparison

Engineering Selection Recommendations

Both the QFSS-078-04.25-L-D-A-P and QFSS-078-04.25-L-D-A maintain Active product status within the Samtec Q2™ QFSS series. Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, indicating equivalent environmental handling requirements. Selection between these parts may be based on inventory availability and procurement lead times, as all electrical and mechanical specifications are identical. Both parts are suitable for applications requiring 156-position, 0.025" pitch surface mount rectangular connectors with shielded center strip contacts and gold plating.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the QFSS-078-04.25-L-D-A-P?

A: Substitution requires equivalence across all critical parameters: 156 positions, 0.025" pitch, 2-row configuration, receptacle type with center strip contacts, surface mount mounting, shielded design with board guide and ground bus, gold contact finish at 10.0µin thickness, 11mm mated stacking height, 0.278" height above board, ROHS3 compliance, and MSL 1 rating.

Q: Are the QFSS-078-04.25-L-D-A-P and QFSS-078-04.25-L-D-A interchangeable?

A: Yes. Both parts meet identical electrical and mechanical specifications and are classified as parametric equivalents. They may be used interchangeably in circuit board designs without modification to footprint, assembly procedures, or mating connector specifications.

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

A: The "-P" suffix denotes packaging specification. Both the main part and substitute maintain equivalent functional and physical characteristics; packaging differences do not affect electrical or mechanical interchangeability.

Q: Are both parts suitable for high-density interconnect applications?

A: Yes. Both the QFSS-078-04.25-L-D-A-P and QFSS-078-04.25-L-D-A are designed for high-density applications, featuring 0.025" pitch spacing, 156 positions across 2 rows, and shielded construction with ground bus support.

Q: What compliance certifications apply to these connectors?

A: Both parts are ROHS3 compliant and carry ECCN EAR99 classification. Both maintain MSL 1 (Unlimited) moisture sensitivity level, indicating no special storage or handling requirements.