SFM-105-02-STL-D-LC Equivalent & Substitute Parts

Part Overview

The SFM-105-02-STL-D-LC is a 10-position receptacle connector from Samtec Inc.'s Tiger Eye™ SFM series, designed for high-reliability board-to-board or cable applications. This surface-mount connector features 0.050" (1.27mm) pitch spacing, gold-plated mating contacts, and push-pull fastening. The product is currently active in production with 740 units in stock.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where the primary part may be unavailable or where alternative specifications better suit particular operational parameters.

Substiute Parts

SFM-105-02-STL-D-LC

Samtec Inc.In Stock: 834SFM-105-02-STL-D-LC Datasheet

Current PartRFQ

20021321-00010C4LF

Amphenol ICC (FCI)In Stock: 1543620021321-00010C4LF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFM-105-02-STL-D-LC is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Connector Type: Receptacle
• Contact Type: Female Socket
• Number of Positions: 10
• Pitch - Mating: 0.050" (1.27mm)
• Number of Rows: 2
• Row Spacing - Mating: 0.050" (1.27mm)
• Mounting Type: Surface Mount
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Finish - Mating: Gold

The substitute part 20021321-00010C4LF (Amphenol ICC/FCI Minitek127® series) meets all mandatory matching parameters. Both connectors are receptacle-type, 10-position, 0.050" pitch, surface-mount, solder-terminated connectors with push-pull fastening and gold mating contact finish. Both are UL94 V-0 rated and RoHS compliant, confirming functional and regulatory equivalence for board-to-board applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SFM-105-02-STL-D-LC and 20021321-00010C4LF are active production connectors with full RoHS compliance and UL94 V-0 flammability certification. Selection between these parts should be based on the following considerations:

SFM-105-02-STL-D-LC (Samtec Tiger Eye™ SFM):

• Extended operating temperature range: -55°C to 125°C
• Higher mating contact finish thickness: 30.0µin (0.76µm)
• Liquid Crystal Polymer (LCP) insulation material
• Beryllium Copper contact material
• Board Lock feature
• Current rating: 3.2A per contact
• Voltage rating: 250VAC

20021321-00010C4LF (Amphenol ICC/FCI Minitek127®):

• Operating temperature range: -40°C to 105°C
• Lower mating contact finish thickness: 10.0µin (0.25µm)
• Plastic insulation material
• Phosphor Bronze contact material
• Pick and Place feature
• Higher inventory availability: 15,377 units in stock

Selection should prioritize the SFM-105-02-STL-D-LC for applications requiring extended temperature operation below -40°C or above 105°C, enhanced contact durability through thicker gold plating, or superior insulation properties. The 20021321-00010C4LF is suitable for general-purpose, industrial, and telecommunications applications within the -40°C to 105°C temperature range where standard plastic insulation and phosphor bronze contacts meet performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the 20021321-00010C4LF be used as a direct replacement for the SFM-105-02-STL-D-LC?

A: Both connectors are functionally equivalent for board-to-board applications within the overlapping operating temperature range of -40°C to 105°C. They share identical pitch spacing (0.050"), position count (10), row configuration (2 rows), mounting type (surface mount), and fastening mechanism (push-pull). However, applications requiring operation below -40°C or above 105°C must use the SFM-105-02-STL-D-LC.

Q: What are the differences in contact finish specifications?

A: The SFM-105-02-STL-D-LC features 30.0µin (0.76µm) gold plating on mating contacts, while the 20021321-00010C4LF has 10.0µin (0.25µm) gold plating. The thicker gold finish on the Samtec connector provides enhanced wear resistance and contact durability in high-cycle mating applications.

Q: Are both connectors RoHS compliant?

A: Yes. The SFM-105-02-STL-D-LC is ROHS3 compliant, and the 20021321-00010C4LF is RoHS compliant. Both meet regulatory requirements for lead-free and restricted substance compliance.

Q: What is the difference in insulation material?

A: The SFM-105-02-STL-D-LC uses Liquid Crystal Polymer (LCP) insulation, which provides superior dimensional stability and chemical resistance. The 20021321-00010C4LF uses standard plastic insulation. LCP is preferred for applications requiring tighter tolerances or exposure to aggressive chemical environments.

Q: How do the contact materials differ?

A: The SFM-105-02-STL-D-LC uses Beryllium Copper contacts, while the 20021321-00010C4LF uses Phosphor Bronze. Beryllium Copper offers superior electrical conductivity and spring properties, making it suitable for high-reliability applications. Phosphor Bronze is standard for general-purpose industrial applications.

Q: What packaging options are available?

A: The SFM-105-02-STL-D-LC is supplied in Tube packaging with 740 units in stock. The 20021321-00010C4LF is available in Cut Tape (CT) and Digi-Reel® packaging with 15,377 units in stock, offering greater supply availability and flexible ordering quantities.

Q: Are there any mechanical dimension differences?

A: The insulation height differs slightly: SFM-105-02-STL-D-LC is 0.185" (4.70mm), while 20021321-00010C4LF is 0.177" (4.50mm). This 0.008" (0.20mm) difference should be verified against PCB layout and mating connector specifications before substitution.

Q: Which connector should be selected for high-temperature applications?

A: The SFM-105-02-STL-D-LC is rated to 125°C and is the appropriate choice for applications exceeding 105°C. The 20021321-00010C4LF is limited to 105°C maximum operating temperature.