HTMS-120-03-T-S-RA Equivalent & Substitute Parts

Part Overview

The HTMS-120-03-T-S-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board applications. This unshrouded header features 20 positions at 0.050" (1.27mm) pitch with solder termination and push-pull fastening. The connector is actively produced and widely used in applications requiring reliable interconnection with high current capacity per contact. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate alternative suppliers.

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, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Unshrouded
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the HTMS-120-03-T-S-RA is determined by strict alignment of the following critical parameters:

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, Right Angle
Termination: Solder
Fastening Type: Push-Pull
Shrouding: Unshrouded
Style: Board to Board or Board to Board/Cable compatible

The substitute part 6-104186-1 (TE Connectivity AMP Connectors) meets all critical substitution criteria. Both parts share identical mating pitch, position count, row configuration, mounting orientation, and termination method. Both are unshrouded headers with push-pull fastening suitable for board-to-board interconnection.

Parameter Comparison

Parameter	HTMS-120-03-T-S-RA (Samtec)	6-104186-1 (TE Connectivity)
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, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Shrouding	Unshrouded	Unshrouded
Contact Length - Mating	0.125" (3.18mm)	0.125" (3.18mm)
Contact Length - Post	0.140" (4.66mm)	0.100" (2.54mm)
Insulation Height	0.096" (2.44mm)	0.116" (2.95mm)
Contact Shape	Square	Circular
Contact Finish - Mating	Tin	Gold
Contact Material	Phosphor Bronze	Copper Alloy
Insulation Material	Liquid Crystal Polymer (LCP)	Thermoplastic
Operating Temperature	-55°C ~ 105°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	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both the HTMS-120-03-T-S-RA and 6-104186-1 are active production parts with UL94 V-0 flammability ratings and unlimited moisture sensitivity classification. Both comply with RoHS standards and share identical ECCN and HTSUS classifications.

The HTMS-120-03-T-S-RA provides a specified current rating of 5A per contact and operates across -55°C to 105°C. The 6-104186-1 operates across a wider lower temperature range (-65°C to 105°C) and specifies a 30VAC voltage rating. Contact geometry differs: the HTMS-120-03-T-S-RA features square contacts with tin finish on phosphor bronze, while the 6-104186-1 features circular contacts with gold finish on copper alloy. Insulation material also differs: LCP versus thermoplastic.

Selection between these parts should be based on specific application requirements regarding contact geometry, finish specifications, temperature extremes, and voltage/current parameters not fully specified in both datasheets.

Frequently Asked Questions (FAQ)

Q: Can 6-104186-1 directly replace HTMS-120-03-T-S-RA in existing designs?

A: Both parts share identical mating pitch (0.050"), position count (20), row configuration (1), mounting type (through-hole right-angle), and termination method (solder). Physical compatibility is established for these core parameters. However, differences in contact post length (0.140" vs 0.100"), insulation height (0.096" vs 0.116"), contact geometry (square vs circular), and contact finish (tin vs gold) may affect fit and performance in specific PCB layouts and mating connector designs. Design verification is necessary.

Q: What are the key differences between these two headers?

A: The primary differences are contact geometry (square vs circular), contact finish (tin vs gold), contact material (phosphor bronze vs copper alloy), insulation material (LCP vs thermoplastic), contact post length, and insulation height. The HTMS-120-03-T-S-RA specifies 5A per contact current rating, while the 6-104186-1 specifies 30VAC voltage rating. Operating temperature ranges differ by 10°C at the lower end.

Q: Are both parts RoHS compliant?

A: Yes. The HTMS-120-03-T-S-RA is ROHS3 compliant, and the 6-104186-1 is RoHS compliant. Both meet regulatory requirements for restricted substance elimination.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Do both parts have the same flammability rating?

A: Yes. Both the HTMS-120-03-T-S-RA and 6-104186-1 are rated UL94 V-0, meeting the same material flammability standard.

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