QFSS-016-04.25-L-D-DP-PC4 Equivalent & Substitute Parts

Part Overview

The QFSS-016-04.25-L-D-DP-PC4 is a 40-position differential pair array rectangular connector manufactured by Samtec Inc. as part of the Q2™ QFSS series. This surface mount connector features 32 differential signal positions plus 8 dedicated power pins, with gold-plated contacts and a 0.025" pitch. The connector is actively produced and maintains full RoHS3 compliance with MSL 1 rating, making it suitable for high-density interconnect applications requiring differential signaling and power distribution in a compact form factor.

Identifying equivalent substitute parts is necessary when addressing supply chain constraints, inventory optimization, or when alternative packaging configurations meet identical electrical and mechanical requirements.

Substiute Parts

QFSS-016-04.25-L-D-DP-PC4

Samtec Inc.In Stock: 697QFSS-016-04.25-L-D-DP-PC4 Datasheet

Current PartRFQ

QFSS-016-04.25-L-D-DP-PT4

Samtec Inc.In Stock: 763QFSS-016-04.25-L-D-DP-PT4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QFSS-016-04.25-L-D-DP-PC4 is determined by strict equivalence across the following critical parameters:

• Connector type and gender (Differential Pair Array, Female)
• Position count and configuration (40 total: 32 differential + 8 power)
• Pitch specification (0.025" / 0.64mm)
• Row configuration (2 rows)
• Mounting technology (Surface Mount)
• Contact material and finish (Gold, 10.0µin thickness)
• Physical dimensions (11mm mated stacking height, 0.278" height above board)
• Compliance certifications (RoHS3, REACH Unaffected)
• Moisture sensitivity rating (MSL 1)

The QFSS-016-04.25-L-D-DP-PT4 meets all these criteria and is classified as a parametric equivalent. The difference between PC4 and PT4 designations reflects packaging configuration only, with both parts sharing identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both QFSS-016-04.25-L-D-DP-PC4 and QFSS-016-04.25-L-D-DP-PT4 are active production parts with identical electrical and mechanical specifications. Selection between these parts is based on packaging requirements and supply availability rather than functional differences.

The QFSS-016-04.25-L-D-DP-PC4 is available with 686 units in stock, while the QFSS-016-04.25-L-D-DP-PT4 has 688 units in stock. Both parts maintain full RoHS3 compliance and REACH unaffected status, meeting regulatory requirements for current and future applications. The MSL 1 rating eliminates moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: What is the difference between QFSS-016-04.25-L-D-DP-PC4 and QFSS-016-04.25-L-D-DP-PT4?

A: The PC4 and PT4 designations indicate different packaging configurations. Both parts are electrically and mechanically identical, with the same connector specifications, pin count, pitch, and physical dimensions. The difference lies in the packaging format (tray type), not in the connector itself.

Q: Can I use QFSS-016-04.25-L-D-DP-PT4 as a direct replacement for QFSS-016-04.25-L-D-DP-PC4?

A: Yes. Both parts share identical electrical and mechanical parameters, including connector type, position count, pitch, mounting type, contact finish, and physical dimensions. They are functionally interchangeable at the component level.

Q: Are there any compliance differences between these parts?

A: No. Both parts carry identical RoHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity rating. They meet the same regulatory and environmental standards.

Q: What does the 0.025" pitch specification mean?

A: The 0.025" (0.64mm) pitch refers to the center-to-center distance between adjacent contact positions. This fine pitch enables high-density interconnection in compact form factors while maintaining signal integrity for differential pair applications.

Q: How many differential signal pairs does this connector support?

A: The connector provides 32 differential signal positions organized as 16 differential pairs, plus 8 dedicated power pins, for a total of 40 positions.