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

Part Overview

The QFSS-078-04.25-L-D-A-TR 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 gold plating, dual-row configuration, and shielding with ground bus plane. The part is actively produced and ROHS3 compliant, making it suitable for high-density interconnect applications requiring reliable signal and power distribution in compact form factors.

Identifying equivalent and substitute parts is necessary when managing supply chain continuity, optimizing inventory costs, or accommodating packaging format preferences while maintaining identical electrical and mechanical performance.

Substiute Parts

QFSS-078-04.25-L-D-A-TR

Samtec Inc.In Stock: 1141QFSS-078-04.25-L-D-A-TR Datasheet

Current PartRFQ

QFSS-078-04.25-L-D-A

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Position Count & Pitch: 156 positions at 0.025" (0.64mm) spacing
• Connector Configuration: Receptacle with center strip contacts, dual-row arrangement
• Electrical Properties: Gold contact finish at 10.0µin thickness
• Mechanical Specifications: Surface mount orientation, 11mm mated stacking height, 0.278" height above board
• Functional Features: Board guide, ground bus plane, shielded design
• Compliance: ROHS3 compliant, MSL 1 rating
• Manufacturer: Samtec Inc., Q2™ QFSS series

The only variable parameter permitting substitution is the packaging format (Tape & Reel versus Tray), as this affects logistics and handling but does not alter electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

Both the QFSS-078-04.25-L-D-A-TR and QFSS-078-04.25-L-D-A are active production parts from Samtec Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and supply chain requirements:

QFSS-078-04.25-L-D-A-TR (Tape & Reel): Suitable for high-volume automated assembly operations where tape-and-reel packaging integrates directly with pick-and-place equipment. This format optimizes component handling efficiency in manufacturing environments.

QFSS-078-04.25-L-D-A (Tray): Suitable for manual assembly, lower-volume production runs, or applications where tray packaging aligns with existing inventory management systems.

Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard reflow soldering processes and unlimited shelf life storage conditions.

Frequently Asked Questions (FAQ)

Q: Can QFSS-078-04.25-L-D-A (Tray) be used as a direct replacement for QFSS-078-04.25-L-D-A-TR (Tape & Reel)?

A: Yes. The electrical and mechanical specifications are identical. The only difference is packaging format. Substitution is valid provided your assembly process can accommodate tray-packaged components.

Q: What determines whether a part qualifies as a substitute for the QFSS-078-04.25-L-D-A-TR?

A: Substitutes must match all of the following: 156-position count, 0.025" pitch, dual-row receptacle configuration, center strip contacts, gold plating at 10.0µin thickness, surface mount orientation, 11mm mated stacking height, board guide and shielded features with ground bus plane, ROHS3 compliance, and MSL 1 rating.

Q: Are there electrical performance differences between tape-and-reel and tray packaging?

A: No. Packaging format does not affect electrical performance, impedance, contact resistance, or signal integrity. Both formats deliver identical connector performance.

Q: What is the significance of the MSL 1 rating?

A: MSL 1 indicates unlimited shelf life. The connector does not require moisture baking before use and can be stored indefinitely under standard conditions without degradation.

Q: Can I mix QFSS-078-04.25-L-D-A-TR and QFSS-078-04.25-L-D-A components in the same production run?

A: Yes, provided your assembly process is configured to handle both packaging formats. The connectors are electrically and mechanically identical and will perform identically once soldered to the PCB.