SFM-125-T2-S-D Equivalent & Substitute Parts

Part Overview

The SFM-125-T2-S-D is a 50-position receptacle connector from Samtec Inc.'s Tiger Eye™ SFM series, designed for surface mount board-to-board or cable applications. This connector features 0.050" (1.27mm) pitch mating with gold-plated female socket contacts rated for 3.2A per contact at 250VAC. The part is Active status and ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Equivalent and substitute parts within the SFM-125 base product family provide alternative configurations for specific application requirements including board guides, board locks, pick-and-place features, and mounting hardware options.

Key Parameters

Parameter	Value
Manufacturer Part Number	SFM-125-T2-S-D
Manufacturer	Samtec Inc.
Category	Rectangular Connectors
Series	Tiger Eye™ SFM
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	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold (30.0µin / 0.76µm)
Contact Finish - Post	Tin
Insulation Material	Liquid Crystal Polymer (LCP)
Insulation Color	Black
Insulation Height	0.185" (4.70mm)
Contact Shape	Square
Contact Material	Beryllium Copper
Operating Temperature	-55°C ~ 125°C
Current Rating	3.2A per Contact
Voltage Rating	250VAC
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution within the SFM-125 family is determined by strict equivalence across core electrical and mechanical parameters. All substitute parts maintain identical specifications for connector type (receptacle), contact type (female socket), number of positions (50), pitch (0.050"), row spacing (0.050"), mounting type (surface mount), termination (solder), fastening type (push-pull), contact finish (gold mating / tin post), insulation material (LCP), operating temperature range (-55°C ~ 125°C), current rating (3.2A per contact), voltage rating (250VAC), and flammability rating (UL94 V-0).

Substitution variations are determined exclusively by the following differentiating parameters:

Insulation Height designation (T2 vs. 02 vs. L2)
Features (Board Guide, Board Lock, Pick and Place, Mounting Flange, Mounting Hardware)
Mated Stacking Heights (6.15mm through 11.76mm)

All substitute parts listed maintain Active product status, ROHS3 compliance, and MSL 1 (Unlimited) rating. Substitution is valid only when the application requirements align with the specific feature set and insulation height designation of the selected part.

Parameter Comparison

Parameter	SFM-125-T2-S-D	SFM-125-02-S-D	SFM-125-02-S-D-A	SFM-125-02-S-D-DS	SFM-125-02-S-D-LC	SFM-125-02-S-D-P	SFM-125-L2-S-D-LC	SFM-125-02-S-D-A-P	SFM-125-L2-S-D-A
Connector Type	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle	Receptacle
Contact Type	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket	Female Socket
Number of Positions	50	50	50	50	50	50	50	50	50
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Number of Rows	2	2	2	2	2	2	2	2	2
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)	Gold (30.0µin)
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Insulation Material	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black
Insulation Height	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)	0.185" (4.70mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Material	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper	Beryllium Copper
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact
Voltage Rating	250VAC	250VAC	250VAC	250VAC	250VAC	250VAC	250VAC	250VAC	250VAC
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active
Features	None	None	Board Guide	Mounting Flange, Mounting Hardware	Board Lock	Pick and Place	Board Lock	Board Guide, Pick and Place	Board Guide

Engineering Selection Recommendations

All substitute parts within the SFM-125 family maintain Active product status and ROHS3 compliance. Selection between SFM-125-T2-S-D and equivalent parts is determined by application-specific feature requirements:

SFM-125-02-S-D provides the base configuration without additional features for standard board-to-board or cable applications.

SFM-125-02-S-D-A and SFM-125-L2-S-D-A include Board Guide features for applications requiring mechanical alignment assistance during mating.

SFM-125-02-S-D-LC and SFM-125-L2-S-D-LC incorporate Board Lock features for applications requiring positive mechanical retention after mating.

SFM-125-02-S-D-DS includes Mounting Flange and Mounting Hardware for applications requiring panel-mount or bracket-mount configurations.

SFM-125-02-S-D-P and SFM-125-02-S-D-A-P include Pick and Place features for automated assembly processes. SFM-125-02-S-D-A-P combines Pick and Place with Board Guide functionality.

All parts maintain identical electrical performance, thermal ratings, and compliance certifications. Substitution is valid when the application environment and assembly process requirements align with the specific feature set of the selected part.

Frequently Asked Questions (FAQ)

Q: Can SFM-125-02-S-D be substituted for SFM-125-T2-S-D?

A: Yes. Both parts maintain identical electrical specifications (50 positions, 0.050" pitch, 3.2A per contact, 250VAC), mechanical configuration (surface mount, push-pull fastening, beryllium copper contacts with gold mating finish), and compliance ratings (ROHS3, UL94 V-0, MSL 1). The primary difference is the insulation height designation. Substitution is valid when the application does not require the specific features of the T2 designation.

Q: What is the difference between SFM-125-02-S-D-LC and SFM-125-02-S-D?

A: SFM-125-02-S-D-LC includes Board Lock feature, which provides positive mechanical retention after mating. SFM-125-02-S-D is the base configuration without this feature. Both maintain identical electrical and thermal specifications. Selection depends on whether the application requires mechanical locking after connector engagement.

Q: Are Board Guide and Board Lock features compatible with automated assembly?

A: SFM-125-02-S-D-A-P combines Board Guide with Pick and Place features for automated assembly. SFM-125-02-S-D-P provides Pick and Place without Board Guide. SFM-125-02-S-D-LC and SFM-125-L2-S-D-LC provide Board Lock but do not include Pick and Place designation. Feature selection must align with specific assembly process requirements.

Q: What does the insulation height designation (T2, 02, L2) indicate?

A: Insulation height designations identify specific mechanical configurations within the SFM-125 family. All substitute parts maintain 0.185" (4.70mm) insulation height and are electrically equivalent. The designation affects mated stacking heights (ranging from 6.15mm to 11.76mm) and mechanical compatibility with specific connector housings or mating interfaces.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. All parts are Active status products suitable for current design implementations.

Q: Can SFM-125-02-S-D-A-P be used in applications requiring Board Lock functionality?

A: No. SFM-125-02-S-D-A-P includes Board Guide and Pick and Place features but does not include Board Lock. For applications requiring both Board Lock and automated assembly compatibility, consult the specific feature combinations available within the SFM-125 family.

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