Samtec QTH-120-04-L-D-A Equivalent & Substitute Parts

Part Overview

The Samtec QTH-120-04-L-D-A is a 240-position rectangular connector header with outer shroud contacts designed for surface mount applications. This connector is part of the Q Strip® QTH series and features gold-plated contacts with a 0.020" (0.50mm) pitch configuration across two rows. The part maintains Active product status and is fully ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts within this series are identified based on identical electrical and mechanical specifications with variations in mated stacking height and corresponding height above board dimensions.

Substiute Parts

QTH-120-04-L-D-A

Samtec Inc.In Stock: 968QTH-120-04-L-D-A Datasheet

Current PartRFQ

QTH-120-01-L-D-A

Samtec Inc.In Stock: 1062QTH-120-01-L-D-A Datasheet

SimilarRFQ

QTH-120-02-L-D-A

Samtec Inc.In Stock: 953QTH-120-02-L-D-A Datasheet

SimilarRFQ

QTH-120-03-L-D-A

Samtec Inc.In Stock: 859QTH-120-03-L-D-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QTH-120-04-L-D-A are identified within the Samtec Q Strip® QTH series based on strict electrical and mechanical compatibility criteria. All substitute parts maintain identical specifications across the following critical parameters:

• Number of positions: 240
• Pitch configuration: 0.020" (0.50mm)
• Number of rows: 2
• Connector type: Header, Outer Shroud Contacts
• Mounting type: Surface Mount
• Contact finish: Gold at 10.0µin (0.25µm) thickness
• Features: Board Guide, Ground Bus (Plane)
• Product status: Active
• Compliance: ROHS3 Compliant, REACH Unaffected, MSL 1

The primary differentiating parameter among substitute parts is the mated stacking height, which directly determines the height above board. This variation allows selection based on specific PCB assembly clearance requirements while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full compliance with ROHS3 and REACH regulations. Selection among QTH-120-01-L-D-A, QTH-120-02-L-D-A, QTH-120-03-L-D-A, and QTH-120-04-L-D-A is determined solely by PCB assembly height clearance requirements. The QTH-120-01-L-D-A provides the minimum profile at 0.160" (4.06mm) above board, while the QTH-120-04-L-D-A provides the maximum at 0.600" (15.24mm). Intermediate options QTH-120-02-L-D-A and QTH-120-03-L-D-A offer 0.286" (7.26mm) and 0.404" (10.27mm) heights respectively. All parts share identical electrical characteristics, contact configuration, and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can QTH-120-01-L-D-A be used as a direct replacement for QTH-120-04-L-D-A?

A: QTH-120-01-L-D-A is electrically and mechanically compatible with QTH-120-04-L-D-A. The primary difference is the mated stacking height and corresponding height above board. Substitution is valid only if PCB assembly clearance permits the reduced 0.160" (4.06mm) profile of QTH-120-01-L-D-A.

Q: What determines compatibility among these substitute parts?

A: Compatibility is based on identical electrical specifications (240 positions, 0.020" pitch, 2 rows), connector type (Header, Outer Shroud Contacts), mounting method (Surface Mount), contact finish (Gold, 10.0µin thickness), and regulatory compliance (ROHS3, REACH Unaffected, MSL 1). Height variations do not affect electrical function.

Q: Are all substitute parts available in the same packaging?

A: All parts are supplied in Tray packaging as specified in the product data.

Q: Do these parts have different lead times or availability?

A: Inventory levels vary among substitute parts. QTH-120-01-L-D-A has 953 pieces in stock, QTH-120-02-L-D-A has 861 pieces, QTH-120-03-L-D-A has 830 pieces, and QTH-120-04-L-D-A has 922 pieces available as new original stock.

Q: What is the significance of the mated stacking height parameter?

A: Mated stacking height defines the vertical distance when the connector is fully mated with its corresponding receptacle. This directly impacts the total height above the PCB and determines clearance compatibility with enclosures, shields, or adjacent components.