QSS-025-01-L-D-LC Equivalent & Substitute Parts

Part Overview

The QSS-025-01-L-D-LC is a 50-position rectangular connector socket manufactured by Samtec Inc. as part of the Q Strip® QSS series. This surface mount component features center strip contacts with gold plating and is designed for applications requiring high-density interconnection in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to provide alternative sourcing options when primary inventory is unavailable or when specific mechanical features better suit application requirements.

Substiute Parts

QSS-025-01-L-D-LC

Samtec Inc.In Stock: 973QSS-025-01-L-D-LC Datasheet

Current PartRFQ

QSS-025-01-L-D-A

Samtec Inc.In Stock: 2750QSS-025-01-L-D-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the QSS-025-01-L-D-LC is determined by strict equivalence across the following critical parameters:

• Manufacturer: Samtec Inc.
• Series: Q Strip® QSS
• Number of Positions: 50
• Pitch: 0.025" (0.64mm)
• Number of Rows: 2
• Mounting Type: Surface Mount
• Connector Type: Socket, Center Strip Contacts
• Contact Finish: Gold at 10.0µin (0.25µm)
• Height Above Board: 0.143" (3.63mm)
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

The identified substitute part QSS-025-01-L-D-A maintains full electrical and mechanical compatibility across all critical parameters. The only variance is in the mechanical feature designation (Board Lock versus Board Guide), which represents a design option within the same connector family and does not affect electrical performance or pin configuration.

Parameter Comparison

Engineering Selection Recommendations

Both QSS-025-01-L-D-LC and QSS-025-01-L-D-A are Active products with identical electrical specifications and full RoHS3 compliance. Selection between these parts should be based on mechanical assembly requirements:

• QSS-025-01-L-D-LC incorporates Board Lock features for applications requiring positive mechanical retention during assembly and operation.
• QSS-025-01-L-D-A incorporates Board Guide features for applications where guided alignment is the primary mechanical requirement.

Both parts satisfy identical electrical and environmental compliance requirements. The choice between them depends solely on the mechanical interface specification of the target application. Current inventory availability shows QSS-025-01-L-D-A at higher stock levels (2723 Pcs versus 875 Pcs), which may influence sourcing decisions for high-volume requirements.

Frequently Asked Questions (FAQ)

Q: Are QSS-025-01-L-D-LC and QSS-025-01-L-D-A electrically interchangeable?

A: Yes. Both parts maintain identical electrical specifications including 50-position configuration, 0.025" pitch, gold contact finish at 10.0µin thickness, and surface mount mounting type. Electrical performance and signal integrity are equivalent.

Q: What is the difference between Board Lock and Board Guide features?

A: Board Lock provides positive mechanical retention through locking mechanisms that secure the connector to the PCB during assembly and operation. Board Guide provides alignment features without positive locking. The selection depends on the mechanical assembly requirements of the target application.

Q: Can I substitute QSS-025-01-L-D-A for QSS-025-01-L-D-LC in an existing design?

A: Substitution is possible only if the application design does not specifically require the Board Lock feature. If the original design specifies Board Lock for mechanical retention, the Board Guide variant may not provide equivalent mechanical performance. Review the mechanical assembly specification before substitution.

Q: Are both parts RoHS3 compliant?

A: Yes. Both QSS-025-01-L-D-LC and QSS-025-01-L-D-A are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the height above board for these connectors?

A: Both parts have a height above board of 0.143" (3.63mm), ensuring identical PCB clearance requirements and assembly compatibility.