SFM-125-01-L-D Equivalent & Substitute Parts

Part Overview

The SFM-125-01-L-D is a 50-position receptacle connector from Samtec Inc.'s Tiger Eye™ SFM series, designed for board-to-board or cable applications. This connector features 0.050" (1.27mm) pitch mating with gold-plated contacts and through-hole solder termination. The part is currently active in production with 758 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the same product series.

Substiute Parts

SFM-125-01-L-D

Samtec Inc.In Stock: 847SFM-125-01-L-D Datasheet

Current PartRFQ

SFM-125-01-L-D-A

Samtec Inc.In Stock: 1270SFM-125-01-L-D-A Datasheet

SimilarRFQ

SFM-125-01-L-D-LC

Samtec Inc.In Stock: 1248SFM-125-01-L-D-LC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SFM-125-01-L-D are identified based on strict electrical and mechanical parameter matching within the Tiger Eye™ SFM series. The following parameters define substitution eligibility:

• Connector type: Receptacle
• Contact type: Female Socket
• Number of positions: 50
• 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 (10.0µin / 0.25µm)
• Contact finish - Post: Tin
• Insulation material: Liquid Crystal Polymer (LCP)
• Insulation color: Black
• Insulation height: 0.180" (4.57mm)
• Contact length - Post: 0.120" (3.05mm)
• Contact shape: Square
• Contact material: Beryllium Copper
• Current rating: 3.2A per Contact
• Voltage rating: 250VAC
• Operating temperature: -55°C ~ 125°C
• Material flammability rating: UL94 V-0
• RoHS status: ROHS3 Compliant
• REACH status: REACH Unaffected

The identified substitutes differ only in optional mechanical features (board guide or board lock) and moisture sensitivity level designation, which do not affect core electrical or mating characteristics.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SFM-125-01-L-D, SFM-125-01-L-D-A, and SFM-125-01-L-D-LC—maintain identical electrical and mechanical specifications for mating, contact performance, and environmental operation. Each part is active in production status and compliant with ROHS3 and REACH requirements.

Selection between these parts depends on application-specific mechanical requirements:

• SFM-125-01-L-D: Base configuration without additional mechanical features
• SFM-125-01-L-D-A: Includes board guide feature for enhanced alignment during mating
• SFM-125-01-L-D-LC: Includes board lock feature for positive mechanical retention

All parts are suitable for applications requiring 50-position rectangular connectors with 0.050" pitch, 3.2A per contact current capacity, and 250VAC voltage rating across the -55°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Are these parts electrically interchangeable?

A: Yes. SFM-125-01-L-D, SFM-125-01-L-D-A, and SFM-125-01-L-D-LC share identical electrical specifications including contact material, current rating (3.2A per contact), voltage rating (250VAC), and operating temperature range (-55°C ~ 125°C).

Q: What is the difference between the three part numbers?

A: The primary differences are optional mechanical features. SFM-125-01-L-D-A includes a board guide for improved alignment, while SFM-125-01-L-D-LC includes a board lock for positive retention. The base SFM-125-01-L-D has neither feature. All other specifications remain identical.

Q: Can I substitute SFM-125-01-L-D-A for SFM-125-01-L-D in my design?

A: Substitution is possible if your PCB layout accommodates the board guide feature. The board guide does not affect electrical performance but requires additional board space. Verify mechanical clearance before implementation.

Q: Can I substitute SFM-125-01-L-D-LC for SFM-125-01-L-D in my design?

A: Substitution is possible if your PCB layout accommodates the board lock feature. The board lock provides positive mechanical retention and does not affect electrical performance. Verify mechanical clearance and mating force requirements before implementation.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected.

Q: What is the difference in moisture sensitivity level (MSL) between these parts?

A: SFM-125-01-L-D is designated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. SFM-125-01-L-D-A and SFM-125-01-L-D-LC are designated MSL Not Applicable. This difference does not affect component performance or storage requirements for standard industrial applications.

Q: What are the mated stacking heights for these connectors?

A: All three parts support identical mated stacking heights: 6.02mm, 6.17mm, 7.80mm, 7.95mm, 9.58mm, 9.73mm, 11.48mm, and 11.63mm.

Q: Are these connectors suitable for high-current applications?

A: Each contact supports 3.2A, providing a total current capacity of 160A across all 50 positions. Application suitability depends on specific current distribution and thermal management requirements.