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

Part Overview

The TSS-125-02-G-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 50-position, 2-row connector with 0.100" (2.54mm) pitch operates across -55°C to 125°C and features gold-plated phosphor bronze contacts with push-pull fastening. The part is active in production and RoHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain alternatives, and application-specific requirements where mechanical or electrical parameters differ within acceptable tolerances.

Key Parameters

Parameter	Value
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)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
Contact Finish - Mating	Gold
Contact Material	Phosphor Bronze
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

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

Mating Pitch and Row Spacing: 0.100" (2.54mm) for both mating pitch and row spacing
Position Count and Configuration: 50 positions in 2-row arrangement
Connector Type and Contact Type: Header with male pin contacts
Shrouding and Fastening: Shrouded 4-wall design with push-pull fastening
Mounting and Termination: Through-hole mounting with solder termination
Operating Temperature Range: -55°C to 125°C minimum
Flammability Rating: UL94 V-0
Contact Finish: Gold plating on mating surface

Substitute parts are grouped into two categories:

Category A - Samtec Flex Stack Series (TSS, TST, HTSS, HTST): Direct mechanical and electrical equivalents within the Samtec product family, differing primarily in insulation material (PBT vs. LCP), contact post finish, and current rating specifications.

Category B - TE Connectivity AMP-Latch Series (1-103308-0, 1-103309-0, 1-5103308-0): Functionally equivalent headers with identical mating pitch, position count, and shrouding, but with variations in contact length, insulation height, contact material (brass vs. phosphor bronze), and post finish specifications.

Parameter Comparison

Parameter	TSS-125-02-G-D	TST-125-02-G-D	HTSS-125-02-G-D	HTST-125-02-G-D	1-103308-0	1-103309-0	1-5103308-0
Manufacturer	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	TE Connectivity	TE Connectivity	TE Connectivity
Series	Flex Stack, TSS	Flex Stack, TST	Flex Stack, HTSS	Flex Stack, HTST	AMP-Latch	AMP-Latch	AMP-Latch
Number of Positions	50	50	50	50	50	50	50
Number of Rows	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	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)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	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)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.165" (4.19mm)	0.165" (4.19mm)	0.165" (4.19mm)	0.165" (4.19mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.350" (8.89mm)	0.388" (9.86mm)	0.388" (9.86mm)	0.388" (9.86mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium
Contact Finish Thickness - Mating	10.0µin (0.25µm)	10.0µin (0.25µm)	10.0µin (0.25µm)	10.0µin (0.25µm)	15.0µin (0.38µm)	30.0µin (0.76µm)	15.0µin (0.38µm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Brass	Brass
Insulation Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT), Glass Filled	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Not Specified	Not Specified	Not Specified
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Current Rating (Amps)	Not Specified	3.4A per Contact	Not Specified	3.4A per Contact	1A per Contact	1A per Contact	1A per Contact
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Samtec Flex Stack Series Substitutes (TST-125-02-G-D, HTSS-125-02-G-D, HTST-125-02-G-D)

These parts maintain identical mechanical dimensions, mating pitch, position count, and operating temperature range as the TSS-125-02-G-D. All are RoHS3 compliant and UL94 V-0 rated. Selection within this series depends on insulation material requirements and current rating specifications. TST-125-02-G-D offers glass-filled PBT insulation with 3.4A per contact rating. HTSS-125-02-G-D uses LCP insulation with natural color. HTST-125-02-G-D combines LCP insulation with 3.4A per contact rating. All maintain phosphor bronze contacts with gold plating and are suitable for direct substitution in applications where insulation material and current capacity are compatible.

TE Connectivity AMP-Latch Series Substitutes (1-103308-0, 1-103309-0, 1-5103308-0)

These parts provide functional equivalence with identical mating pitch, position count, row spacing, and shrouding. Mechanical differences include shorter contact lengths (0.240" mating vs. 0.250", 0.120" post vs. 0.165") and increased insulation height (0.388" vs. 0.350"). Contact material is brass rather than phosphor bronze. TE parts feature 1A per contact current rating. Compliance status varies: 1-103308-0 and 1-103309-0 are RoHS non-compliant, while 1-5103308-0 is RoHS3 compliant. Selection of TE substitutes requires verification that reduced contact length and different contact material are acceptable for the application. The 1-5103308-0 is preferred for RoHS3 compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can TST-125-02-G-D replace TSS-125-02-G-D directly?

A: Yes. Both parts share identical mating pitch (0.100"), position count (50), row spacing (0.100"), shrouding (4-wall), mounting type (through-hole), and operating temperature range (-55°C to 125°C). The primary difference is insulation material: TST-125-02-G-D uses glass-filled PBT while TSS-125-02-G-D uses standard PBT. TST-125-02-G-D also specifies 3.4A per contact current rating. Both are RoHS3 compliant.

Q: What are the key differences between Samtec and TE Connectivity substitutes?

A: Samtec Flex Stack parts (TSS, TST, HTSS, HTST) maintain the same contact lengths and insulation height as the original TSS-125-02-G-D. TE Connectivity AMP-Latch parts feature shorter contact lengths (0.240" mating, 0.120" post vs. 0.250" and 0.165") and greater insulation height (0.388" vs. 0.350"). Contact material differs: Samtec uses phosphor bronze; TE uses brass. These dimensional and material differences may affect mechanical fit and electrical performance in specific applications.

Q: Are TE Connectivity parts RoHS compliant?

A: Compliance varies. Parts 1-103308-0 and 1-103309-0 are RoHS non-compliant. Part 1-5103308-0 is RoHS3 compliant. For applications requiring RoHS3 compliance, use 1-5103308-0 or Samtec equivalents (TST-125-02-G-D, HTSS-125-02-G-D, HTST-125-02-G-D).

Q: What is the difference between HTSS-125-02-G-D and HTST-125-02-G-D?

A: Both use LCP insulation and maintain identical mechanical dimensions. HTSS-125-02-G-D does not specify a current rating. HTST-125-02-G-D specifies 3.4A per contact and has MSL listed as Not Applicable rather than 1 (Unlimited). Select HTST-125-02-G-D for applications requiring defined current capacity.

Q: Can I use 1-103309-0 instead of 1-103308-0?

A: Both are functionally equivalent with identical mechanical and electrical specifications. The primary difference is contact finish thickness on the mating surface: 1-103309-0 specifies 30.0µin (0.76µm) versus 15.0µin (0.38µm) for 1-103308-0. Selection depends on contact durability requirements for the specific application. Both are RoHS non-compliant.

Q: What is the operating temperature difference between TSS-125-02-G-D and TE parts?

A: TSS-125-02-G-D and all Samtec Flex Stack substitutes operate from -55°C to 125°C. TE Connectivity AMP-Latch parts operate from -65°C to 105°C. The TE parts have a lower upper temperature limit (105°C vs. 125°C), which may be a limiting factor in high-temperature applications.

Q: Are all substitute parts available in the same packaging?

A: No. TSS-125-02-G-D, HTSS-125-02-G-D, and HTST-125-02-G-D are supplied in Bulk packaging. TE Connectivity parts (1-103308-0, 1-103309-0, 1-5103308-0) are supplied in Tube packaging. Verify packaging requirements for procurement and handling procedures.

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