HTMS-120-02-S-S Equivalent & Substitute Parts

Part Overview

The HTMS-120-02-S-S is an unshrouded rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board applications. This 20-position header operates at 0.050" (1.27mm) pitch with gold-plated mating contacts and tin-plated posts, rated for 5A per contact across an operating temperature range of -55°C to 125°C. The part is active in production and RoHS3 compliant with UL94 V-0 flammability rating.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's core specifications, enabling direct functional replacement in applications where the connector serves the same board-to-board interface role.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.050" (1.27mm)
Number of Positions	20
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Unshrouded
Contact Finish - Mating	Gold
Insulation Material	Liquid Crystal Polymer (LCP)
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the HTMS-120-02-S-S is determined by strict alignment of the following parameters:

Connector type (Header)
Contact type (Male Pin)
Pitch specification (0.050" / 1.27mm)
Position count (20)
Row configuration (1 row)
Mounting method (Through Hole)
Termination type (Solder)
Fastening mechanism (Push-Pull)
Shrouding configuration (Unshrouded)
Contact finish on mating surface (Gold)
Flammability compliance (UL94 V-0)

The substitute part 6-104178-1 (TE Connectivity AMP Connectors) meets these core electrical and mechanical criteria, enabling functional equivalence in board-to-board connector applications.

Parameter Comparison

Parameter	HTMS-120-02-S-S (Samtec)	6-104178-1 (TE Connectivity)
Manufacturer	Samtec Inc.	TE Connectivity AMP Connectors
Series	HTMS	AMPMODU System 50
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Number of Positions	20	20
Number of Rows	1	1
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Shrouding	Unshrouded	Unshrouded
Contact Length - Mating	0.100" (2.54mm)	0.120" (3.05mm)
Contact Length - Post	0.120" (3.05mm)	0.100" (2.54mm)
Overall Contact Length	0.320" (8.13mm)	0.320" (8.13mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin	Tin
Contact Material	Phosphor Bronze	Copper Alloy
Insulation Material	Liquid Crystal Polymer (LCP)	Thermoplastic
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Current Rating (Amps)	5A per Contact	Not specified
Voltage Rating	Not specified	30VAC
RoHS Status	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both the HTMS-120-02-S-S and 6-104178-1 are active production parts with equivalent core electrical and mechanical specifications for 20-position, 0.050" pitch through-hole header applications. Both meet UL94 V-0 flammability requirements and carry RoHS compliance certifications.

The HTMS-120-02-S-S operates across -55°C to 125°C with a specified 5A per contact current rating and uses Liquid Crystal Polymer insulation. The 6-104178-1 operates across -65°C to 105°C with a 30VAC voltage rating and uses thermoplastic insulation. Selection between these parts depends on application-specific temperature and electrical requirements.

Contact length specifications differ between the two parts: the HTMS-120-02-S-S has 0.100" mating contact length with 0.120" post length, while the 6-104178-1 reverses these dimensions. PCB layout and mating connector depth must be verified for compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 6-104178-1 directly replace the HTMS-120-02-S-S in existing designs?

A: Direct replacement requires verification of contact length compatibility. The HTMS-120-02-S-S has 0.100" mating contact length and 0.120" post length, while the 6-104178-1 has 0.120" mating contact length and 0.100" post length. PCB layout and mating connector specifications must accommodate these dimensional differences.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is based on matching connector type (Header), contact type (Male Pin), pitch (0.050" / 1.27mm), position count (20), row configuration (1 row), mounting method (Through Hole), termination (Solder), fastening type (Push-Pull), shrouding (Unshrouded), mating contact finish (Gold), and flammability rating (UL94 V-0).

Q: Are there temperature or current rating differences between these parts?

A: The HTMS-120-02-S-S operates from -55°C to 125°C with 5A per contact current rating. The 6-104178-1 operates from -65°C to 105°C with a 30VAC voltage rating specified. Application requirements for temperature range and current capacity must be evaluated against these specifications.

Q: What insulation material differences exist?

A: The HTMS-120-02-S-S uses Liquid Crystal Polymer (LCP) insulation, while the 6-104178-1 uses thermoplastic insulation. Both materials meet UL94 V-0 flammability requirements. Material selection may impact thermal performance and mechanical properties in specific applications.

Q: Are both parts RoHS compliant?

A: Yes. The HTMS-120-02-S-S is ROHS3 compliant, and the 6-104178-1 is RoHS compliant. Both parts carry MSL 1 (Unlimited) moisture sensitivity ratings and share the same ECCN (EAR99) and HTSUS (8536.69.4040) classifications.

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