TE Connectivity AMP Connectors 2-1546931-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 2-1546931-3 is a 23 Position Terminal Block Header with male pins, unshrouded configuration, designed for 0.197" (5.00mm) vertical through-hole mounting. This component belongs to the Buchanan series and features solder termination with a rated current of 12 A at 300 V (UL). The part is classified as obsolete, necessitating identification of equivalent substitute components that maintain functional and electrical compatibility for new designs or replacement applications.

Key Parameters

Parameter	Value
Number of Positions	23
Pitch	0.197" (5.00mm)
Header Orientation	Vertical
Termination Style	Solder
Mounting Type	Through Hole
Current Rating (UL)	12 A
Voltage Rating (UL)	300 V
Contact Tail Length	0.138" (3.50mm)
Insulation Height	0.079" (2.00mm)
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 2-1546931-3 terminal block header are selected based on strict electrical and mechanical parameter alignment. The critical substitution criteria include:

Mandatory Matching Parameters:

23 positions with 0.197" (5.00mm) pitch spacing
Vertical through-hole mounting orientation
Solder termination style
Contact tail length of 0.138" (3.50mm)
Insulation height of 0.079" (2.00mm)
Male pin, unshrouded header type

Electrical Compatibility Parameters:

Voltage rating of 300 V (UL)
Current rating of 10 A minimum (UL)
Brass or copper alloy contact material
UL94 V-0 or equivalent flammability rating

Compliance Parameters:

ROHS3 or RoHS Compliant status
Moisture Sensitivity Level 1 (Unlimited)
ECCN EAR99 classification

The identified substitute parts meet these criteria while offering active product status and improved availability compared to the obsolete 2-1546931-3.

Parameter Comparison

Parameter	2-1546931-3 (TE Connectivity)	A-TB500-OP23 (Assmann WSW)	ESZH23160 (Amphenol PCD)
Manufacturer	TE Connectivity AMP Connectors	Assmann WSW Components	Amphenol PCD
Number of Positions	23	23	23
Pitch	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)
Header Orientation	Vertical	Vertical	Vertical
Termination Style	Solder	Solder	Solder
Mounting Type	Through Hole	Through Hole	Through Hole
Current Rating (UL)	12 A	10 A	12 A
Voltage Rating (UL)	300 V	300 V	300 V
Contact Tail Length	0.138" (3.50mm)	0.138" (3.50mm)	0.138" (3.50mm)
Insulation Height	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Contact Material	Brass	Brass	Copper Alloy
Housing Material	Polyamide (PA66), Nylon 6/6	Thermoplastic	Polyamide (PA66), Nylon 6/6
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

Primary Substitute: ESZH23160 (Amphenol PCD)

The ESZH23160 terminal block header is the preferred substitute for the obsolete 2-1546931-3. This component maintains identical electrical ratings (12 A at 300 V UL), matching pitch, position count, and mechanical dimensions. The ESZH23160 features active product status with confirmed availability of 676 units in stock. Housing material is polyamide (PA66), nylon 6/6, consistent with the original specification. Contact material is copper alloy, which meets the brass or copper alloy requirement for terminal block headers. RoHS compliance and EAR99 classification align with regulatory requirements. Operating temperature range of -40°C to 110°C provides adequate thermal performance for standard industrial applications.

Secondary Substitute: A-TB500-OP23 (Assmann WSW Components)

The A-TB500-OP23 serves as an alternative substitute with active product status and 792 units available in inventory. This component matches all critical mechanical parameters including pitch, position count, contact tail length, and insulation height. Electrical ratings are 10 A at 300 V (UL), which is 2 A lower than the original specification. This reduced current rating requires circuit-level evaluation to confirm suitability for applications requiring the full 12 A capacity. Housing material is thermoplastic, differing from the original polyamide specification. Operating temperature range extends to -40°C to 115°C. ROHS3 compliance and REACH unaffected status confirm regulatory alignment. This substitute is suitable for applications with current requirements at or below 10 A.

Selection Criteria:

For applications requiring the full 12 A current rating, select ESZH23160. For applications with current requirements of 10 A or less, either ESZH23160 or A-TB500-OP23 is acceptable. Both substitutes provide active product status, ensuring long-term availability and supply chain stability compared to the obsolete 2-1546931-3.

Frequently Asked Questions (FAQ)

Q: Can the A-TB500-OP23 be used in place of the 2-1546931-3 in all applications?

A: The A-TB500-OP23 is suitable for applications where the circuit current requirement does not exceed 10 A. The original 2-1546931-3 is rated for 12 A at 300 V (UL). If your application requires the full 12 A capacity, the ESZH23160 is the appropriate substitute. If your application operates at 10 A or below, the A-TB500-OP23 is compatible.

Q: Are the mechanical dimensions identical between all three parts?

A: Yes. The 2-1546931-3, A-TB500-OP23, and ESZH23160 share identical pitch (0.197" / 5.00mm), contact tail length (0.138" / 3.50mm), and insulation height (0.079" / 2.00mm). All three are 23-position vertical through-hole solder-terminated headers. PCB footprints are interchangeable.

Q: What is the difference in housing material between the substitutes?

A: The 2-1546931-3 and ESZH23160 use polyamide (PA66), nylon 6/6 housing material. The A-TB500-OP23 uses thermoplastic housing. Both materials meet UL94 V-0 flammability requirements. Polyamide housing provides superior chemical resistance and dimensional stability in industrial environments.

Q: Are all three parts RoHS compliant?

A: Yes. The 2-1546931-3 is ROHS3 compliant. The A-TB500-OP23 is ROHS3 compliant. The ESZH23160 is RoHS compliant. All three parts meet RoHS requirements for lead-free solder and restricted substance limitations.

Q: What is the operating temperature range for each part?

A: The 2-1546931-3 does not specify an operating temperature range in the provided data. The A-TB500-OP23 operates from -40°C to 115°C. The ESZH23160 operates from -40°C to 110°C. Both substitutes provide adequate thermal performance for standard industrial applications.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All three parts share identical mechanical dimensions, pitch, and through-hole mounting specifications. PCB layouts designed for the 2-1546931-3 accommodate the A-TB500-OP23 and ESZH23160 without modification. Solder reflow profiles and assembly processes remain unchanged.

Q: What is the contact material composition for each part?

A: The 2-1546931-3 uses brass contacts. The A-TB500-OP23 uses brass contacts. The ESZH23160 uses copper alloy contacts. Both brass and copper alloy provide equivalent electrical conductivity and corrosion resistance for terminal block applications.

Q: Are there any packaging differences between the substitutes?

A: The 2-1546931-3 is supplied in standard packaging (not specified). The A-TB500-OP23 is supplied in bulk packaging. The ESZH23160 is supplied in tray packaging. Packaging format does not affect component functionality or electrical performance.

Q: Which substitute offers the best long-term availability?

A: Both ESZH23160 and A-TB500-OP23 have active product status, ensuring continued manufacturing and supply chain support. The ESZH23160 is the recommended choice for new designs requiring 12 A capacity. The A-TB500-OP23 is suitable for applications with 10 A or lower current requirements.

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