SB2M-M3/5BT Equivalent & Substitute Parts

Part Overview

The SB2M-M3/5BT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 1000 V DC reverse voltage with a 2 A average rectified current rating and is packaged in the DO-214AA (SMB) form factor. The device is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or design flexibility needs. The following parts maintain functional equivalence within the specified parameter ranges for this rectifier diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.15 @ 2 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 1000 V
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SB2M-M3/5BT are classified based on electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Parametric Equivalence Requirements:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AA or SMB compatible
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Packaging Compatibility:

All substitute parts utilize the DO-214AA (SMB) package form factor, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Compliance Requirements:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, ensuring compatibility with standard manufacturing and storage conditions.

Substitute parts are grouped into two categories: Parametric Equivalents (matching all key electrical parameters) and Manufacturer-Recommended alternatives (meeting minimum functional requirements with potential parameter variations).

Parameter Comparison

Parameter	SB2M-M3/5BT (Main)	SB2M-M3/52T	STTH208U	S2M R5G
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	STMicroelectronics	Taiwan Semiconductor Corporation
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	800 V	1000 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A	1.15 V @ 2 A	1.65 V @ 2 A	1.15 V @ 2 A
Reverse Recovery Time (trr)	2 µs	2 µs	75 ns	1.5 µs
Current - Reverse Leakage @ Vr	1 µA @ 1000 V	1 µA @ 1000 V	5 µA @ 800 V	1 µA @ 1000 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT)
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	Max 175°C	-55 to 150°C
Product Status	Active	Active	Active	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SB2M-M3/52T (Parametric Equivalent - Preferred Substitute)

The SB2M-M3/52T is a direct parametric equivalent to the SB2M-M3/5BT, manufactured by the same supplier (Vishay General Semiconductor - Diodes Division). This part maintains identical electrical specifications across all critical parameters: 1000 V reverse voltage, 2 A average rectified current, 1.15 V forward voltage drop, and 2 µs reverse recovery time. The primary distinction is packaging format (Tape & Reel), which does not affect electrical performance. Both parts are Active status with ROHS3 compliance. The SB2M-M3/52T offers higher inventory availability (2600 pcs vs. 751 pcs), making it the optimal substitute when the main part is unavailable.

STTH208U (Manufacturer-Recommended Alternative)

The STTH208U is manufactured by STMicroelectronics and operates at 800 V DC reverse voltage with 2 A average rectified current. This part exhibits a higher forward voltage drop (1.65 V @ 2 A) and significantly faster recovery characteristics (75 ns trr vs. 2 µs). The STTH208U is suitable for applications where the 800 V rating is sufficient and faster switching performance is beneficial. This part is Active status with ROHS3 compliance and offers substantial inventory availability (20300 pcs). Selection of this part requires verification that the 800 V maximum reverse voltage rating meets circuit requirements.

S2M R5G (Parametric Equivalent - Limited Availability)

The S2M R5G, manufactured by Taiwan Semiconductor Corporation, matches the SB2M-M3/5BT across voltage and current ratings (1000 V, 2 A) and forward voltage characteristics (1.15 V @ 2 A). This part exhibits slightly faster recovery time (1.5 µs vs. 2 µs) and higher capacitance (30 pF vs. 16 pF @ 4V, 1MHz). The S2M R5G is marked as Discontinued at DiGi Electronics, indicating limited future availability. This part is suitable only when other active alternatives are exhausted and existing inventory is confirmed available.

Frequently Asked Questions (FAQ)

Q: Can the SB2M-M3/52T be used as a direct replacement for the SB2M-M3/5BT?

A: Yes. The SB2M-M3/52T is a parametric equivalent with identical electrical specifications. The only difference is the packaging format (Tape & Reel vs. Tape & Reel), which does not affect electrical performance or PCB compatibility. Both parts use the DO-214AA (SMB) package.

Q: What is the key difference between the SB2M-M3/5BT and the STTH208U?

A: The STTH208U operates at a lower maximum reverse voltage (800 V vs. 1000 V) and exhibits higher forward voltage drop (1.65 V vs. 1.15 V @ 2 A). The STTH208U features significantly faster recovery time (75 ns vs. 2 µs), which may reduce switching losses in high-frequency applications. Selection depends on whether the 800 V rating is acceptable for the intended circuit.

Q: Is the S2M R5G a suitable long-term substitute?

A: The S2M R5G is not recommended for new designs due to its Discontinued status at DiGi Electronics. While parametrically equivalent, this part has limited future availability. The SB2M-M3/52T or STTH208U are preferred for ongoing production requirements.

Q: Do all substitute parts maintain the same operating temperature range?

A: The SB2M-M3/5BT, SB2M-M3/52T, and S2M R5G all operate from -55°C to 150°C junction temperature. The STTH208U has a higher maximum junction temperature of 175°C, which may provide additional thermal margin in high-temperature applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (SB2M-M3/52T, STTH208U, and S2M R5G) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the SB2M-M3/5BT.

Q: What packaging formats are available for these substitute parts?

A: The SB2M-M3/5BT and SB2M-M3/52T are supplied in Tape & Reel (TR) format. The STTH208U is available in Cut Tape (CT) & Digi-Reel® format. The S2M R5G is supplied in Cut Tape (CT) format. All parts use the DO-214AA (SMB) package case, ensuring mechanical compatibility with existing PCB designs.

Q: Can the STTH208U be used in applications requiring 1000 V reverse voltage rating?

A: No. The STTH208U is rated for 800 V maximum reverse voltage. Use of this part in circuits requiring 1000 V reverse voltage protection would violate the device rating and create reliability risk. The SB2M-M3/52T or S2M R5G must be used for 1000 V applications.

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