TSS-125-02-SS-D Equivalent & Substitute Parts

Part Overview

The TSS-125-02-SS-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This shrouded 50-position connector operates across the -55°C to 125°C temperature range and features gold-plated mating contacts with tin-plated posts. The part maintains Active product status and carries ROHS3 compliance certification. Substitute parts are identified when electrical and mechanical parameters align with the main part specifications, enabling direct functional replacement in board-to-board or cable interconnect applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	TSS-125-02-SS-D
Manufacturer	Samtec Inc.
Category	Rectangular Connectors
Series	Flex Stack, TSS
Connector Type	Header
Contact Type	Male Pin
Number of Positions	50
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Operating Temperature	-55°C ~ 125°C
Contact Finish - Mating	Gold (30.0µin / 0.76µm)
Contact Finish - Post	Tin
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TSS-125-02-SS-D is determined by strict alignment of the following critical parameters:

Connector Type: Header
Contact Type: Male Pin
Number of Positions: 50
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Mounting Type: Through Hole
Shrouding: Shrouded - 4 Wall
Termination: Solder
Fastening Type: Push-Pull
Contact Length - Mating: 0.250" (6.35mm)
Contact Length - Post: 0.165" (4.19mm)
Overall Contact Length: 0.530" (13.46mm)
Insulation Height: 0.350" (8.89mm)
Contact Shape: Square
Contact Finish - Mating: Gold (30.0µin / 0.76µm)
Contact Finish - Post: Tin
Contact Material: Phosphor Bronze
Operating Temperature: -55°C ~ 125°C
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Variations in insulation material (Polybutylene Terephthalate vs. Liquid Crystal Polymer), insulation color, series designation, and application style (Board to Board vs. Board to Cable/Wire) do not preclude substitution when all electrical and mechanical parameters remain constant.

Parameter Comparison

Parameter	TSS-125-02-SS-D	HTSS-125-02-S-D	TSS-125-02-S-D	TST-125-02-S-D
Manufacturer	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Series	Flex Stack, TSS	Flex Stack, HTSS	Flex Stack, TSS	Flex Stack, TST
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	50	50	50	50
Number of Rows	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.250" (6.35mm)	0.250" (6.35mm)	0.250" (6.35mm)	0.250" (6.35mm)
Contact Length - Post	0.165" (4.19mm)	0.165" (4.19mm)	0.165" (4.19mm)	0.165" (4.19mm)
Overall Contact Length	0.530" (13.46mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.530" (13.46mm)
Insulation Height	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)
Contact Shape	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin	Tin	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Insulation Material	Polybutylene Terephthalate (PBT)	Liquid Crystal Polymer (LCP)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT), Glass Filled
Insulation Color	Black	Natural	Black	Black
Style	Board to Board or Cable	Board to Board or Cable	Board to Board or Cable	Board to Cable/Wire

Engineering Selection Recommendations

All four parts maintain Active product status and carry ROHS3 compliance certification with UL94 V-0 flammability rating. The TSS-125-02-SS-D, TSS-125-02-S-D, and TST-125-02-S-D share identical insulation material composition (Polybutylene Terephthalate with glass fill in the TST variant), while the HTSS-125-02-S-D employs Liquid Crystal Polymer insulation. All parts satisfy the same operating temperature range, contact geometry, and electrical interface specifications.

Selection between these parts depends on application-specific requirements regarding insulation material properties and intended connection style. The TST-125-02-S-D is specified for Board to Cable/Wire applications, whereas the TSS variants support Board to Board or Cable configurations. The HTSS-125-02-S-D offers alternative insulation material characteristics through Liquid Crystal Polymer construction.

Frequently Asked Questions (FAQ)

Q: Can TSS-125-02-SS-D be directly replaced with HTSS-125-02-S-D?

A: Yes. Both parts share identical electrical and mechanical parameters including connector type, contact configuration, pitch, mounting method, and operating temperature range. The insulation material differs (PBT vs. LCP), but this does not affect functional compatibility when electrical and mechanical interface requirements are met.

Q: What is the difference between TSS-125-02-S-D and TST-125-02-S-D?

A: The primary difference is application style. TSS-125-02-S-D supports Board to Board or Cable connections, while TST-125-02-S-D is specified for Board to Cable/Wire applications. The TST variant uses glass-filled PBT insulation. All other electrical and mechanical parameters remain identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TSS-125-02-SS-D, HTSS-125-02-S-D, TSS-125-02-S-D, and TST-125-02-S-D all carry ROHS3 compliance certification.

Q: Do these connectors support the same current rating?

A: The TST-125-02-S-D specifies a current rating of 3.4A per contact. Current rating data is not provided for the other parts in this comparison set.

Q: What is the moisture sensitivity level for all parts?

A: All parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability is confirmed for all electrical and mechanical parameters listed in this comparison. Design validation should confirm that insulation material properties and application style align with specific circuit board layout and connector orientation requirements.

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