QFSS-052-04.25-L-D-PC4 Equivalent & Substitute Parts

Part Overview

The QFSS-052-04.25-L-D-PC4 is a 112-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, a 0.025" pitch, dual-row configuration, and integrated shielding with ground bus and power pins. The part is Active status and ROHS3 compliant, making it suitable for high-density interconnect applications requiring reliable signal and power distribution. Equivalent substitute parts may be required due to inventory constraints, procurement lead times, or specific packaging preferences while maintaining identical electrical and mechanical compatibility.

Substiute Parts

QFSS-052-04.25-L-D-PC4

Samtec Inc.In Stock: 1151QFSS-052-04.25-L-D-PC4 Datasheet

Current PartRFQ

QFSS-052-04.25-L-D-PT4

Samtec Inc.In Stock: 917QFSS-052-04.25-L-D-PT4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QFSS-052-04.25-L-D-PC4 is determined by strict equivalence across the following critical parameters:

• Connector type and position count (112 positions with 104 signal + 8 power)
• Pitch specification (0.025" / 0.64mm)
• Dual-row configuration
• Surface mount technology
• Gold contact finish with 10.0µin thickness
• Integrated shielding, ground bus, and power pin architecture
• Mated stacking height (11mm) and height above board (0.278")
• Compliance certifications (ROHS3, REACH Unaffected)
• Moisture sensitivity level (MSL 1)

The substitute part QFSS-052-04.25-L-D-PT4 maintains identical electrical and mechanical specifications across all these parameters. The difference between the main part and substitute is limited to packaging designation (PC4 versus PT4), which does not affect connector functionality, performance, or board-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the QFSS-052-04.25-L-D-PC4 and QFSS-052-04.25-L-D-PT4 are Active status products from Samtec Inc. and are fully equivalent for board-level integration. Selection between these parts should be based on:

• Procurement availability and lead time
• Packaging format requirements (PC4 versus PT4 designation)
• Inventory status at the time of component sourcing
• Supply chain logistics and storage considerations

Both parts maintain identical compliance certifications (ROHS3 Compliant, REACH Unaffected) and environmental ratings (MSL 1). No functional, electrical, or mechanical differences exist between these parts. Direct substitution is permissible without design modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Are QFSS-052-04.25-L-D-PC4 and QFSS-052-04.25-L-D-PT4 electrically identical?

A: Yes. Both parts are 112-position receptacles with identical pitch (0.025"), contact finish (gold, 10.0µin), and feature set (shielded, ground bus, power pins). Electrical performance and signal integrity characteristics are equivalent.

Q: What is the difference between PC4 and PT4 packaging designations?

A: The PC4 and PT4 designations refer to packaging format and tray configuration. The connector itself is functionally identical. The difference affects only storage, handling, and logistics.

Q: Can I substitute QFSS-052-04.25-L-D-PT4 for QFSS-052-04.25-L-D-PC4 on an existing PCB design?

A: Yes. No PCB layout modifications are required. The connectors are mechanically and electrically interchangeable. Footprint, mounting requirements, and signal routing remain unchanged.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both QFSS-052-04.25-L-D-PC4 and QFSS-052-04.25-L-D-PT4 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special environmental controls.