SMS-134-01-T-D Equivalent & Substitute Parts Reference

Part Overview

The SMS-134-01-T-D is a 68-position rectangular receptacle connector manufactured by Samtec Inc., designed for through-hole board-to-board applications. This connector features a 0.050" (1.27mm) pitch mating interface with push-pull fastening and tin contact finish. The product is currently active in production with 957 units in stock.

Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters: connector type (receptacle), number of positions (68), pitch specification (0.050"), mounting method (through-hole), and fastening mechanism (push-pull). Substitutes enable design flexibility when primary components face supply constraints or when alternative contact finishes or compliance certifications are required.

Key Parameters

Parameter	Specification
Connector Type	Receptacle
Number of Positions	68
Pitch - Mating	0.050" (1.27mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Fastening Type	Push-Pull
Termination	Solder
Style	Board to Board

Substitute Part Grouping Explanation

Substitution eligibility for the SMS-134-01-T-D is determined by the following mandatory parameters:

Connector Type: Must be Receptacle
Number of Positions: Must be 68
Pitch - Mating: Must be 0.050" (1.27mm)
Number of Rows: Must be 2
Row Spacing - Mating: Must be 0.100" (2.54mm)
Mounting Type: Must be Through Hole
Fastening Type: Must be Push-Pull
Termination: Must be Solder
Style: Must be Board to Board

The identified substitute parts—TE Connectivity AMP Connectors models 1-104078-3 and 6-104078-3—satisfy all mandatory parameters. Both are 68-position receptacle connectors with identical pitch, row configuration, mounting method, and fastening mechanism. Variations in contact finish (gold versus tin), contact finish thickness, insulation material, operating temperature range, current rating, and compliance certifications represent secondary differences that do not prevent functional substitution within the specified parameter set.

Parameter Comparison

Parameter	SMS-134-01-T-D (Samtec)	1-104078-3 (TE Connectivity)	6-104078-3 (TE Connectivity)
Manufacturer	Samtec Inc.	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Connector Type	Receptacle	Receptacle	Receptacle
Number of Positions	68	68	68
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Style	Board to Board	Board to Board	Board to Board
Contact Finish - Mating	Tin	Gold	Gold
Contact Finish - Post	Tin	Tin-Lead	Tin
Insulation Color	Black	Black	Black
Insulation Height	0.335" (8.51mm)	0.350" (8.89mm)	0.350" (8.89mm)
Contact Length - Post	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 105°C
Current Rating (Amps)	5A per Contact	1A	1A
Voltage Rating	Not specified	30VAC	30VAC
Insulation Material	Liquid Crystal Polymer (LCP)	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled
Contact Material	Phosphor Bronze	Copper Alloy	Copper Alloy
RoHS Status	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant
Product Status	Active	Active	Active
Inventory	957 Pcs	841 Pcs	2488 Pcs

Engineering Selection Recommendations

Primary Selection: SMS-134-01-T-D (Samtec Inc.)

The SMS-134-01-T-D is the specified component and remains the first choice when available. It offers ROHS3 compliance, higher current rating (5A per contact), and extended operating temperature range (-55°C to 125°C). The tin contact finish on both mating and post surfaces provides cost efficiency for standard applications.

Secondary Selection: 6-104078-3 (TE Connectivity AMP Connectors)

The 6-104078-3 is the preferred substitute when SMS-134-01-T-D availability is constrained. This part maintains RoHS compliance (matching the primary component's regulatory status), offers superior inventory availability (2488 units), and provides gold contact finish on mating surfaces for enhanced corrosion resistance. The tin post finish aligns with the primary component. Operating temperature range (-65°C to 105°C) is suitable for most applications, though the lower maximum temperature (105°C versus 125°C) must be verified against system thermal requirements. Current rating (1A per contact) is lower than the primary component and must be evaluated against circuit load specifications.

Tertiary Selection: 1-104078-3 (TE Connectivity AMP Connectors)

The 1-104078-3 is functionally equivalent to the 6-104078-3 but carries RoHS non-compliance status and lower inventory availability (841 units). This part should be selected only when 6-104078-3 is unavailable and RoHS compliance is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can SMS-134-01-T-D be directly replaced with 1-104078-3 or 6-104078-3?

A: Yes, within the scope of the specified electrical and mechanical parameters. Both TE Connectivity parts are 68-position receptacle connectors with 0.050" pitch, 2-row configuration, through-hole mounting, and push-pull fastening. Functional compatibility is established. However, differences in current rating (1A versus 5A per contact), operating temperature range, and contact finish must be evaluated against specific application requirements.

Q: What are the key differences between 1-104078-3 and 6-104078-3?

A: Both parts are electrically and mechanically identical. The primary differences are: (1) RoHS compliance status—6-104078-3 is RoHS compliant while 1-104078-3 is non-compliant; (2) Contact finish on post—6-104078-3 uses tin while 1-104078-3 uses tin-lead; (3) Inventory availability—6-104078-3 has 2488 units versus 841 units for 1-104078-3. The 6-104078-3 is the preferred substitute.

Q: Does the gold contact finish on TE Connectivity parts affect compatibility?

A: No. Gold mating contact finish does not affect mechanical or electrical compatibility with the tin-finished SMS-134-01-T-D. Gold provides enhanced corrosion resistance and is suitable for applications requiring extended shelf life or harsh environmental exposure. The choice between tin and gold finishes is application-dependent and does not prevent substitution.

Q: Are there any thermal or electrical limitations when substituting?

A: Yes. The TE Connectivity substitutes (1-104078-3 and 6-104078-3) have a maximum operating temperature of 105°C compared to 125°C for the SMS-134-01-T-D. Applications requiring sustained operation above 105°C must use the primary component. Additionally, the TE Connectivity parts are rated at 1A per contact versus 5A per contact for the SMS-134-01-T-D. Circuits requiring current density above 1A per contact must use the primary component or verify that the lower rating is acceptable for the specific application.

Q: What is the insulation height difference between these parts?

A: The SMS-134-01-T-D has an insulation height of 0.335" (8.51mm), while both TE Connectivity substitutes measure 0.350" (8.89mm). This 0.015" (0.38mm) difference is minor and does not typically affect board layout or mating interface compatibility. However, applications with tight vertical clearance constraints should verify this dimension against PCB design specifications.

Q: Which substitute should be selected for new designs?

A: For new designs, the 6-104078-3 is the recommended substitute when the SMS-134-01-T-D is unavailable. It provides RoHS compliance, superior inventory availability, and gold contact finish for enhanced reliability. Verify that the 1A per contact current rating and 105°C maximum operating temperature meet application requirements before finalizing the design.

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