A-TB350-OP12 Terminal Block Header Equivalent & Substitute Parts

Part Overview

The A-TB350-OP12 is a 12-position terminal block header manufactured by Assmann WSW Components, designed for vertical through-hole mounting with 4.6mm pitch spacing. This component is classified as a male pin, unshrouded header suitable for solder termination applications. The part maintains active product status with 953 units currently in stock.

Terminal block headers of this specification are essential in applications requiring reliable electrical connections with standardized pitch spacing and voltage/current ratings. Substitute parts become necessary when primary inventory is unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits equivalent alternatives meeting identical electrical and mechanical parameters.

Key Parameters

Parameter	Value
Number of Positions	12
Pitch	0.138" (4.60mm)
Header Orientation	Vertical
Type	Header, Male Pins, Unshrouded
Termination Style	Solder
Mounting Type	Through Hole
Voltage - UL	300 V
Current - UL	10 A
Operating Temperature	-40°C ~ 115°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the A-TB350-OP12 is determined by strict equivalence across the following critical parameters:

Position Count: 12 positions (non-negotiable)
Pitch Spacing: 0.138" (4.60mm) (non-negotiable)
Header Type: Male pins, unshrouded configuration
Orientation: Vertical mounting
Termination: Solder connection
Mounting: Through-hole technology
Electrical Ratings: Minimum 300 V UL voltage and 10 A UL current capability
Compliance: ROHS3 compliance and UL94 V-0 flammability rating

The substitute part 1945193 (Phoenix Contact COMBICON PST series) meets all critical electrical and mechanical parameters required for direct substitution in applications utilizing the A-TB350-OP12.

Parameter Comparison

Parameter	A-TB350-OP12 (Assmann WSW)	1945193 (Phoenix Contact)	Compatibility
Manufacturer Part Number	A-TB350-OP12	1945193	Different manufacturers
Number of Positions	12	12	Equivalent
Positions Per Level	12	12	Equivalent
Number of Levels	1	1	Equivalent
Pitch	0.138" (4.60mm)	0.138" (4.60mm)	Equivalent
Header Orientation	Vertical	Vertical	Equivalent
Type	Header, Male Pins, Unshrouded	Header, Male Pins, Unshrouded	Equivalent
Termination Style	Solder	Solder	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Voltage - UL	300 V	300 V	Equivalent
Current - UL	10 A	10 A	Equivalent
Current - IEC	Not specified	8 A	Substitute exceeds minimum
Voltage - IEC	Not specified	250 V	Substitute meets standard
Material Flammability Rating	UL94 V-0	UL94 V-0	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Active	Active	Both actively manufactured
Contact Mating Finish	Tin	Tin	Equivalent

Engineering Selection Recommendations

Both the A-TB350-OP12 and substitute part 1945193 maintain active product status with current manufacturing support. Both components carry ROHS3 compliance certification and UL94 V-0 flammability ratings, meeting regulatory requirements for industrial and commercial applications.

The A-TB350-OP12 (Assmann WSW) is the primary specified component with 953 units in current inventory. The 1945193 (Phoenix Contact COMBICON PST series) is a manufacturer-recommended equivalent with 2,378 units available, providing enhanced supply chain flexibility.

Selection between these parts should be based on:

Availability requirements and lead time considerations
Existing supplier relationships and procurement processes
PCB layout constraints (minor dimensional variations exist in contact tail length and insulation height)
Cost optimization within approved component lists

Both parts satisfy identical electrical performance requirements and regulatory compliance standards for direct substitution in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the 1945193 be used as a direct replacement for the A-TB350-OP12 on existing PCBs?

A: The 1945193 is electrically and functionally equivalent. However, minor dimensional differences exist: the 1945193 has a contact tail length of 0.150" (3.81mm) versus 0.138" (4.60mm) on the A-TB350-OP12, and insulation height of 0.512" (13.00mm) versus 0.079" (2.00mm). PCB footprint compatibility must be verified before substitution.

Q: Are both parts suitable for the same voltage and current applications?

A: Yes. Both parts are rated for 300 V UL and 10 A UL. The 1945193 additionally provides 250 V IEC and 8 A IEC ratings. Both meet the electrical requirements for equivalent applications.

Q: What compliance certifications apply to both parts?

A: Both the A-TB350-OP12 and 1945193 are ROHS3 compliant, carry UL94 V-0 flammability ratings, and are REACH unaffected. Both maintain Moisture Sensitivity Level 1 (Unlimited).

Q: Are there differences in housing material between these parts?

A: Yes. The A-TB350-OP12 uses thermoplastic housing, while the 1945193 uses polyamide (PA) nylon. Both materials meet UL94 V-0 requirements and are suitable for the specified operating temperature range.

Q: What is the operating temperature range for both parts?

A: The A-TB350-OP12 is rated -40°C to 115°C. Operating temperature is not specified for the 1945193 in the provided data.

Q: Can these parts be used interchangeably in new designs?

A: Yes, provided PCB layout accommodates the dimensional variations noted in contact tail length and insulation height. Both parts meet identical electrical specifications and regulatory requirements.

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