TST-120-01-S-D Equivalent & Substitute Parts

Part Overview

The TST-120-01-S-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 40-position, 2-row connector operates across a wide temperature range (-55°C to 125°C) and is compliant with ROHS3 standards. The connector features shrouded 4-wall construction with push-pull fastening and gold-plated mating contacts rated at 3.4A per contact. As an active product with 689 units in stock, substitute parts may be required for design flexibility, supply chain optimization, or specific application requirements where alternative manufacturers' offerings meet the core electrical and mechanical specifications.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
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
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Operating Temperature Range	-55°C ~ 125°C
Current Rating	3.4A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TST-120-01-S-D is determined by the following critical parameters:

Primary Compatibility Criteria:

Connector type (Header)
Contact type (Male Pin)
Pitch - Mating (0.100" / 2.54mm)
Row spacing - Mating (0.100" / 2.54mm)
Mounting type (Through Hole)
Shrouding configuration (Shrouded - 4 Wall)
Fastening type (Push-Pull)
Number of rows (2)

Secondary Compatibility Considerations:

Number of positions
Contact finish and material composition
Operating temperature range
Current rating per contact
Flammability rating (UL94 V-0)
RoHS compliance status

The substitute parts listed below are grouped based on their alignment with these parameters. Parts 103309-8 and 5103309-8 (both TE Connectivity AMP-Latch series) maintain full compatibility with the primary criteria and differ only in specific contact materials, finish thicknesses, and compliance certifications. Part N2520-6002-RB (3M 2500 series) differs in position count (20 vs. 40) and is therefore applicable only in applications where the reduced position requirement is acceptable.

Parameter Comparison

Parameter	TST-120-01-S-D (Samtec)	103309-8 (TE Connectivity)	5103309-8 (TE Connectivity)	N2520-6002-RB (3M)
Manufacturer	Samtec Inc.	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors	3M
Series	Flex Stack, TST	AMP-Latch	AMP-Latch	2500
Number of Positions	40	40	40	20
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)
Connector Type	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.250" (6.35mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.243" (6.17mm)
Contact Length - Post	0.115" (2.92mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.112" (2.84mm)
Insulation Height	0.350" (8.89mm)	0.388" (9.86mm)	0.388" (9.86mm)	0.390" (9.91mm)
Contact Shape	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Material	Phosphor Bronze	Brass	Brass	Copper Alloy
Operating Temperature Range	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 105°C	-55°C ~ 105°C
Current Rating	3.4A per Contact	1A per Contact	1A per Contact	1.75A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

103309-8 (TE Connectivity AMP-Latch): This 40-position substitute maintains mechanical and electrical compatibility with the TST-120-01-S-D across pitch, row spacing, mounting type, and shrouding. However, the current rating is reduced to 1A per contact (versus 3.4A), and RoHS compliance status is non-compliant. This part is suitable only for applications where the lower current requirement is acceptable and RoHS3 compliance is not mandated. The operating temperature range is extended to -65°C but limited to 105°C maximum.

5103309-8 (TE Connectivity AMP-Latch): This variant is functionally equivalent to 103309-8 with the critical distinction of ROHS3 compliance. The 40-position configuration, pitch, row spacing, and mounting characteristics remain identical. The current rating remains 1A per contact. This part is appropriate for applications requiring RoHS3 compliance where the reduced current rating is acceptable.

N2520-6002-RB (3M 2500 Series): This 20-position connector differs fundamentally from the TST-120-01-S-D in position count, making it suitable only for applications requiring half the contact density. The pitch, row spacing, mounting type, and shrouding remain compatible. The current rating is 1.75A per contact. This part is applicable only where the 20-position requirement aligns with circuit design specifications.

Frequently Asked Questions (FAQ)

Q: Can 103309-8 or 5103309-8 be used as direct replacements for TST-120-01-S-D?

A: Both parts maintain the same 40-position, 2-row configuration with 0.100" (2.54mm) pitch and row spacing. However, the current rating is reduced from 3.4A to 1A per contact. Direct substitution is possible only if the application current requirements do not exceed 1A per contact. Additionally, 103309-8 is RoHS non-compliant, while 5103309-8 is ROHS3 compliant.

Q: What is the primary difference between 103309-8 and 5103309-8?

A: The primary difference is RoHS compliance status. 103309-8 is RoHS non-compliant, while 5103309-8 is ROHS3 compliant. Both parts share identical electrical and mechanical specifications, including 40 positions, 1A per contact current rating, and AMP-Latch series designation.

Q: Is N2520-6002-RB compatible with the TST-120-01-S-D?

A: N2520-6002-RB is mechanically compatible in terms of pitch, row spacing, mounting type, and shrouding. However, it provides only 20 positions versus 40 positions in the TST-120-01-S-D. This part is suitable only for applications where a 20-position connector meets the circuit requirements.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by connector type (Header), contact type (Male Pin), pitch (0.100" / 2.54mm), row spacing (0.100" / 2.54mm), number of rows (2), mounting type (Through Hole), shrouding (Shrouded - 4 Wall), and fastening type (Push-Pull). Position count, current rating, and compliance certifications are secondary considerations dependent on application requirements.

Q: How do the operating temperature ranges compare?

A: The TST-120-01-S-D operates from -55°C to 125°C. Both TE Connectivity parts (103309-8 and 5103309-8) operate from -65°C to 105°C, providing extended low-temperature capability but limited high-temperature operation. The 3M N2520-6002-RB operates from -55°C to 105°C, matching the low-temperature limit of the original part but with reduced maximum temperature.

Q: What packaging formats are available for these parts?

A: TST-120-01-S-D is supplied in Bulk packaging. 103309-8 and 5103309-8 are supplied in Tube packaging. N2520-6002-RB is supplied in Tray packaging. Packaging format may affect handling, storage, and procurement workflows.

Q: Are all substitute parts UL94 V-0 rated?

A: Yes, all listed substitute parts (103309-8, 5103309-8, and N2520-6002-RB) carry UL94 V-0 material flammability ratings, matching the TST-120-01-S-D specification.

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