S2B-ZR-SM3A-TF Equivalent & Substitute Parts

Part Overview

The S2B-ZR-SM3A-TF is a surface mount right-angle rectangular connector header manufactured by JST Sales America Inc. in the ZH series. This 2-position connector with 1.5mm pitch is designed for board-to-cable/wire applications with solder termination and detent lock fastening. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.059" (1.50mm)
Number of Positions	2
Number of Rows	1
Mounting Type	Surface Mount, Right Angle
Termination	Solder
Fastening Type	Detent Lock
Shrouding	Shrouded - 4 Wall
Current Rating	1A
Voltage Rating	50V
Operating Temperature	-25°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the S2B-ZR-SM3A-TF is determined by the following critical parameters:

Pitch - Mating: 0.059" (1.50mm) — must match exactly for mechanical and electrical compatibility
Number of Positions: 2 — connector must accommodate the same contact count
Mounting Type: Surface Mount, Right Angle — PCB mounting orientation and method must be identical
Connector Type & Contact Type: Header with Male Pin — functional role in the assembly must remain unchanged
Termination & Fastening: Solder termination with Detent Lock — assembly and retention method must be preserved
Electrical Ratings: 1A current and 50V voltage — minimum electrical performance requirements

Two substitute parts meet these core criteria:

S2B-ZR-SM4A-TF (JST Sales America Inc.) — Direct manufacturer alternative with identical core specifications and active product status
292228-2 (TE Connectivity AMP Connectors) — Cross-manufacturer equivalent with compatible electrical and mechanical parameters

Parameter Comparison

Parameter	S2B-ZR-SM3A-TF (Main)	S2B-ZR-SM4A-TF (Direct)	292228-2 (Cross)
Manufacturer	JST Sales America Inc.	JST Sales America Inc.	TE Connectivity AMP Connectors
Series	ZH	ZH	Mini CT
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.059" (1.50mm)	0.059" (1.50mm)	0.059" (1.50mm)
Number of Positions	2	2	2
Number of Rows	1	1	1
Mounting Type	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle
Termination	Solder	Solder	Solder
Fastening Type	Detent Lock	Detent Lock	Detent Lock
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Insulation Height	0.146" (3.70mm)	0.146" (3.70mm)	0.193" (4.90mm)
Contact Shape	Circular	Circular	Square
Contact Finish - Mating	Tin-Lead	Tin	Tin
Contact Material	Brass	Brass	Brass
Current Rating	1A	1A	Varies by Wire Gauge
Voltage Rating	50V	50V	50VAC
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-30°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

S2B-ZR-SM4A-TF is the primary substitute for the obsolete S2B-ZR-SM3A-TF. Both parts are from the same manufacturer and ZH series, with identical electrical ratings, mounting configuration, and operating temperature range. The S2B-ZR-SM4A-TF carries active product status and RoHS compliance, making it the preferred choice for new designs and ongoing production support. The transition from Tin-Lead to Tin contact finish aligns with modern RoHS requirements.

292228-2 serves as a cross-manufacturer alternative when JST parts are unavailable. This TE Connectivity connector maintains compatibility across all critical parameters: 1.5mm pitch, 2-position configuration, surface mount right-angle mounting, and solder termination with detent lock. The 292228-2 offers an extended operating temperature range (-30°C to 105°C) and ROHS3 compliance. Physical differences include a square contact shape versus circular, and a 0.193" insulation height compared to 0.146", which may require PCB layout verification for clearance.

Frequently Asked Questions (FAQ)

Q: Can S2B-ZR-SM4A-TF directly replace S2B-ZR-SM3A-TF without PCB modification?

A: Yes. Both connectors share identical pitch (1.5mm), position count (2), mounting type (surface mount right-angle), and footprint dimensions. The Tin contact finish of the S2B-ZR-SM4A-TF is compatible with standard solder assembly processes.

Q: What are the implications of the RoHS compliance difference?

A: The S2B-ZR-SM3A-TF uses Tin-Lead contact finish and is RoHS non-compliant. The S2B-ZR-SM4A-TF uses Tin finish and is RoHS compliant. For applications subject to RoHS regulations or customer requirements, the S2B-ZR-SM4A-TF is the appropriate selection.

Q: Is 292228-2 mechanically compatible with existing PCB designs for S2B-ZR-SM3A-TF?

A: The 292228-2 maintains the same 1.5mm pitch and right-angle surface mount configuration. However, the insulation height differs (0.193" versus 0.146"), requiring verification that component clearance and mating connector alignment remain within design tolerances.

Q: What is the difference between the contact shapes in these connectors?

A: The S2B-ZR-SM3A-TF and S2B-ZR-SM4A-TF use circular contacts, while the 292228-2 uses square contacts. Both geometries are compatible with standard mating connectors of the same pitch and position count, but contact shape may affect insertion force and retention characteristics.

Q: Can these connectors be used interchangeably in high-temperature applications?

A: The S2B-ZR-SM3A-TF and S2B-ZR-SM4A-TF are rated to 85°C. The 292228-2 extends to 105°C. For applications exceeding 85°C, the 292228-2 provides additional thermal margin.

Q: What packaging options are available for these substitutes?

A: S2B-ZR-SM4A-TF is available in Cut Tape (CT) and Digi-Reel packaging. The 292228-2 is supplied in Tape & Reel (TR) format. Packaging selection depends on production volume and assembly line requirements.

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