SM02B-SURS-TF Equivalent & Substitute Parts

Part Overview

The SM02B-SURS-TF is a rectangular connector header manufactured by JST Sales America Inc., designed for surface mount, right-angle applications with 2 positions at 0.031" (0.80mm) pitch. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design and procurement requirements. The connector features shrouded 4-wall construction, push-pull fastening, and operates across -25°C to 85°C with a 30V voltage rating and 0.2A to 0.5A current capacity.

Key Parameters

Parameter	Value
Connector Type	Header
Pitch - Mating	0.031" (0.80mm)
Number of Positions	2
Number of Rows	1
Mounting Type	Surface Mount, Right Angle
Shrouding	Shrouded - 4 Wall
Voltage Rating	30V
Current Rating	0.2A, 0.5A
Operating Temperature	-25°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the SM02B-SURS-TF is determined by the following critical parameters: connector type (header), pitch (0.031"/0.80mm), number of positions (2), mounting configuration (surface mount, right angle), shrouding style (shrouded 4-wall), voltage rating (30V minimum), current rating (0.2A minimum), operating temperature range (-25°C to 85°C minimum), and flammability rating (UL94 V-0).

Substitute parts are grouped into two categories:

Direct Manufacturer Substitute: Parts from the same manufacturer (JST) that maintain identical electrical and mechanical specifications with variations only in packaging, contact finish material, or compliance status.

Similar Manufacturer Substitute: Parts from alternative manufacturers (TE Connectivity) that meet or exceed the core electrical and mechanical requirements, with allowable variations in contact type, fastening mechanism, or insulation material, provided all critical parameters remain compatible.

Parameter Comparison

Parameter	SM02B-SURS-TF (Main)	SM02B-SURS-TF(LF)(SN) (Direct Substitute)	1674976-2 (Similar Substitute)
Manufacturer	JST Sales America Inc.	JST Sales America Inc.	TE Connectivity AMP Connectors
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Pitch - Mating	0.031" (0.80mm)	0.031" (0.80mm)	0.031" (0.80mm)
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
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Contact Type	Outer Shroud Contact	Outer Shroud Contact	Tab
Fastening Type	Push-Pull	Push-Pull	Friction Lock
Voltage Rating	30V	30V	30V
Current Rating	0.2A, 0.5A	0.2A, 0.5A	0.5A
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Contact Finish - Mating	Tin-Lead	Tin	Tin
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SM02B-SURS-TF(LF)(SN) is the primary substitute for the obsolete SM02B-SURS-TF. This direct manufacturer equivalent maintains identical electrical and mechanical specifications. The primary distinction is product status: the substitute is active and available, whereas the main part is obsolete. The substitute achieves ROHS3 compliance and employs tin contact finish instead of tin-lead, representing a modern formulation of the same connector series. Packaging is supplied as Tape & Reel (TR) with 2430 units in stock.

1674976-2 from TE Connectivity AMP Connectors serves as an alternative substitute when JST parts are unavailable. This connector meets all critical electrical parameters and maintains identical pitch, position count, mounting configuration, and shrouding. Differences include contact type (Tab versus Outer Shroud Contact), fastening mechanism (Friction Lock versus Push-Pull), and insulation material (Thermoplastic versus Polyamide). The current rating specification is 0.5A, which covers the upper range of the original part. This substitute is ROHS3 compliant with 721 units in stock.

Frequently Asked Questions (FAQ)

Q: Can SM02B-SURS-TF(LF)(SN) be used as a direct replacement for SM02B-SURS-TF?

A: Yes. Both connectors share identical pitch (0.031"/0.80mm), position count (2), mounting type (surface mount right angle), shrouding (4-wall), voltage rating (30V), current rating (0.2A/0.5A), and operating temperature range (-25°C to 85°C). The substitute is the active production equivalent of the obsolete main part.

Q: What are the key differences between SM02B-SURS-TF(LF)(SN) and the original SM02B-SURS-TF?

A: Contact finish changes from tin-lead to tin, and RoHS compliance status changes from non-compliant to ROHS3 compliant. Packaging is supplied as Tape & Reel rather than bulk. Electrical and mechanical performance remain equivalent.

Q: Is 1674976-2 compatible with designs using SM02B-SURS-TF?

A: Compatibility depends on specific design requirements. The TE Connectivity connector maintains pitch, position count, mounting type, and shrouding. However, the fastening mechanism differs (Friction Lock versus Push-Pull), and contact type varies (Tab versus Outer Shroud Contact). Mechanical fit and mating interface must be evaluated for your specific application.

Q: What is the current rating difference between 1674976-2 and the original part?

A: The original SM02B-SURS-TF supports 0.2A and 0.5A current ratings. The TE Connectivity 1674976-2 specifies 0.5A. If your design requires the 0.2A rating, this must be confirmed as compatible with the TE part's specifications.

Q: Are both substitute parts RoHS compliant?

A: Yes. SM02B-SURS-TF(LF)(SN) is ROHS3 compliant. 1674976-2 is ROHS3 compliant. The original SM02B-SURS-TF is RoHS non-compliant.

Q: What packaging options are available for these substitutes?

A: SM02B-SURS-TF(LF)(SN) is supplied in Tape & Reel (TR) packaging. Packaging information for 1674976-2 is not specified in available data.

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