SFM-120-L3-L-D Equivalent & Substitute Parts

Part Overview

The SFM-120-L3-L-D is a 40-position receptacle connector from Samtec Inc.'s Tiger Eye™ SFM series, designed for board-to-board or cable applications. This rectangular connector features 0.050" (1.27mm) pitch mating with through-hole solder termination and push-pull fastening. The part is Active status and ROHS3 compliant, making it suitable for applications requiring reliable interconnection in industrial and commercial environments. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the connector series.

Substiute Parts

SFM-120-L3-L-D

Samtec Inc.In Stock: 1105SFM-120-L3-L-D Datasheet

Current PartRFQ

SFM-120-03-L-D

Samtec Inc.In Stock: 1049SFM-120-03-L-D Datasheet

MFR RecommendedRFQ

SFM-120-03-L-D-A

Samtec Inc.In Stock: 1286SFM-120-03-L-D-A Datasheet

MFR RecommendedRFQ

SFM-120-L3-L-D-A

Samtec Inc.In Stock: 1382SFM-120-L3-L-D-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SFM-120-L3-L-D are identified based on strict equivalence of the following critical parameters:

• Connector Type: Receptacle
• Number of Positions: 40
• Pitch - Mating: 0.050" (1.27mm)
• Number of Rows: 2
• Row Spacing - Mating: 0.050" (1.27mm)
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Finish - Mating: Gold
• Current Rating: 3.2A per Contact
• Voltage Rating: 250VAC
• Operating Temperature: -55°C ~ 125°C
• Material Flammability Rating: UL94 V-0
• Insulation Material: Liquid Crystal Polymer (LCP)
• RoHS Status: ROHS3 Compliant
• Series: Tiger Eye™ SFM
• Base Product Number: SFM-120

The identified substitutes maintain all critical electrical and mechanical parameters. Variations in moisture sensitivity level (MSL) and board guide features do not affect core connector functionality and compatibility.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment and long-term availability. The SFM-120-L3-L-D, SFM-120-03-L-D, SFM-120-03-L-D-A, and SFM-120-L3-L-D-A are electrically and mechanically equivalent for standard board-to-board or cable interconnection applications.

Selection between these parts depends on specific design requirements:

• SFM-120-L3-L-D and SFM-120-L3-L-D-A are functionally identical except for board guide feature availability in the latter.
• SFM-120-03-L-D and SFM-120-03-L-D-A are functionally identical except for board guide feature availability in the latter.
• The board guide feature in the -A variants provides mechanical alignment assistance during mating but does not alter electrical performance or contact specifications.
• Moisture sensitivity level differences do not impact connector performance in standard operating conditions.

All parts are suitable for applications requiring 3.2A per contact at 250VAC with operating temperatures from -55°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can SFM-120-03-L-D be used as a direct replacement for SFM-120-L3-L-D?

A: Yes. Both parts are 40-position receptacle connectors with identical electrical ratings, pitch specifications, and mechanical mounting characteristics. The parts are interchangeable in applications where the specific connector variant designation does not impose design constraints.

Q: What is the difference between parts with and without the "-A" suffix?

A: The "-A" suffix indicates the inclusion of a board guide feature. This feature provides mechanical alignment assistance during connector mating but does not alter electrical performance, contact ratings, or core connector functionality. Selection depends on whether board-level alignment guidance is required for the application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four parts—SFM-120-L3-L-D, SFM-120-03-L-D, SFM-120-03-L-D-A, and SFM-120-L3-L-D-A—are ROHS3 compliant and maintain Active product status.

Q: What does Moisture Sensitivity Level (MSL) indicate?

A: MSL is a classification for component sensitivity to moisture during storage and handling. SFM-120-03-L-D carries MSL 1 (Unlimited), indicating minimal moisture sensitivity. The other variants carry "Not Applicable," indicating no moisture sensitivity classification requirement. This difference does not affect connector performance or compatibility.

Q: Are the mated stacking heights identical across all substitute parts?

A: Yes. All parts maintain identical mated stacking heights: 6.02mm, 6.17mm, 7.80mm, 7.95mm, 9.58mm, 9.73mm, 11.48mm, and 11.63mm. These heights are determined by the connector series and position count, which remain constant across all substitutes.

Q: Can these connectors be used in high-temperature applications?

A: Yes. All parts are rated for operating temperatures from -55°C to 125°C and carry UL94 V-0 material flammability rating, making them suitable for industrial and commercial applications within this temperature range.