Equivalent & Substitute Parts for S2G-M3/5BT

Part Overview

The S2G-M3/5BT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount device operates at 400 V DC reverse voltage with 1.5 A average rectified current in a DO-214AA (SMB) package. The part is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified to provide design flexibility for procurement, inventory management, and supply chain continuity. Substitutes are selected based on matching or exceeding critical electrical parameters including reverse voltage rating, average rectified current capacity, forward voltage characteristics, and recovery time specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 1.5 A	V
Reverse Recovery Time (trr)	2	µs
Current - Reverse Leakage @ Vr	1	µA @ 400 V
Capacitance @ Vr, F	16	pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the S2G-M3/5BT are grouped into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Vishay S2G Series): Parts S2G-E3/52T, S2G-E3/5BT, S2GHE3_A/H, and S2GHE3_A/I share identical electrical specifications with the main part. These differ only in packaging format (Cut Tape versus Tape & Reel) or automotive qualification grade. All maintain 400 V reverse voltage, 1.5 A average rectified current, 1.15 V forward voltage at 1.5 A, and 2 µs reverse recovery time. The automotive-qualified variants (S2GHE3_A/H and S2GHE3_A/I) carry AEC-Q101 certification.

Manufacturer-Recommended Alternatives: Parts from Central Semiconductor Corp, Micro Commercial Co, Diodes Incorporated, and onsemi provide functional substitution with trade-offs in electrical characteristics. These alternatives maintain the 400 V reverse voltage rating and DO-214AA SMB package but differ in average rectified current capacity (1 A or 2 A), forward voltage drop, and recovery time specifications. Selection depends on circuit requirements and performance tolerance.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Current - Average Rectified (Io): 1.5 A (parametric equivalents) or 1 A / 2 A (alternatives)
Operating Temperature Range: -55°C to 150°C minimum

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Packaging Format	Product Status	Grade
S2G-M3/5BT	Vishay	400	1.5	1.15 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard
S2G-E3/52T	Vishay	400	1.5	1.15 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Cut Tape (CT)	Active	Standard
S2G-E3/5BT	Vishay	400	1.5	1.15 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard
S2GHE3_A/H	Vishay	400	1.5	1.15 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Cut Tape (CT)	Active	Automotive
S2GHE3_A/I	Vishay	400	1.5	1.15 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	Active	Automotive
CMR1U-04 TR13 PBFREE	Central Semiconductor Corp	400	1	1.25 @ 1 A	50 ns	5 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard
ER1G-LTP	Micro Commercial Co	400	1	1.25 @ 1 A	35 ns	5 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard
ES2G-13-F	Diodes Incorporated	400	2	1.25 @ 2 A	35 ns	5 @ 400 V	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	Active	Standard
MRS1504T3G	onsemi	400	1.5	1.04 @ 1.5 A	2 µs	1 @ 400 V	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	Not For New Designs	Standard
MURS140-13-F	Diodes Incorporated	400	1	1.25 @ 1 A	50 ns	5 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard
RS1GB-13-F	Diodes Incorporated	400	1	1.3 @ 1 A	150 ns	5 @ 400 V	DO-214AA, SMB	Tape & Reel (TR)	Active	Standard

Engineering Selection Recommendations

Direct Parametric Equivalents: Parts S2G-E3/52T, S2G-E3/5BT, S2GHE3_A/H, and S2GHE3_A/I are direct electrical equivalents to S2G-M3/5BT. These parts maintain identical voltage, current, and recovery time specifications. Selection among these variants depends on packaging format requirements (Cut Tape versus Tape & Reel) and automotive qualification needs. The automotive-qualified variants S2GHE3_A/H and S2GHE3_A/I carry AEC-Q101 certification and are suitable for automotive applications. All parametric equivalents are Active product status.

Current-Reduced Alternatives (1 A Rating): Parts CMR1U-04 TR13 PBFREE, ER1G-LTP, MURS140-13-F, and RS1GB-13-F operate at 400 V reverse voltage but are rated for 1 A average rectified current. These parts are suitable for applications where the circuit current requirement does not exceed 1 A. All maintain Active product status. Forward voltage characteristics range from 1.25 V to 1.3 V at rated current. Recovery time varies from 35 ns to 150 ns, with faster recovery options available.

Current-Increased Alternative (2 A Rating): Part ES2G-13-F from Diodes Incorporated provides 2 A average rectified current capacity at 400 V reverse voltage. This part is suitable for applications requiring higher current handling than the S2G-M3/5BT. Forward voltage is 1.25 V at 2 A. Recovery time is 35 ns. Product status is Active.

Legacy Part Consideration: Part MRS1504T3G from onsemi matches the electrical specifications of S2G-M3/5BT (400 V, 1.5 A, 2 µs recovery time) but carries "Not For New Designs" product status. This part is available in high inventory but should not be selected for new circuit designs.

Compliance and Certification: All recommended parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. Automotive applications requiring AEC-Q101 certification should select S2GHE3_A/H or S2GHE3_A/I variants.

Frequently Asked Questions (FAQ)

Q: Can I substitute S2G-M3/5BT with a 1 A rated diode?

A: Substitution with 1 A rated parts (CMR1U-04 TR13 PBFREE, ER1G-LTP, MURS140-13-F, RS1GB-13-F) is permissible only if the circuit design operates at or below 1 A average rectified current. The 400 V reverse voltage rating is maintained across all alternatives. Forward voltage characteristics differ slightly (1.25 V to 1.3 V versus 1.15 V), which may affect circuit performance in voltage-sensitive applications.

Q: What is the difference between S2G-E3/52T and S2G-E3/5BT?

A: Both parts are parametric equivalents to S2G-M3/5BT with identical electrical specifications. The difference is packaging format: S2G-E3/52T is supplied in Cut Tape (CT) format with 140,200 pieces in stock, while S2G-E3/5BT is supplied in Tape & Reel (TR) format with 7,421 pieces in stock. Selection depends on assembly line requirements and inventory availability.

Q: Are automotive-qualified variants available?

A: Yes. Parts S2GHE3_A/H and S2GHE3_A/I are automotive-grade equivalents carrying AEC-Q101 qualification. Both maintain identical electrical specifications to S2G-M3/5BT. S2GHE3_A/H is supplied in Cut Tape (CT) format with 81,900 pieces in stock. S2GHE3_A/I is supplied in Cut Tape (CT) & Digi-Reel® format with 225,400 pieces in stock.

Q: Can I use ES2G-13-F as a substitute?

A: Part ES2G-13-F is a functional substitute with higher current capacity (2 A versus 1.5 A) at the same 400 V reverse voltage. This part is suitable for applications where increased current handling is beneficial or required. Forward voltage is 1.25 V at 2 A, and recovery time is 35 ns. The part is Active status and ROHS3 compliant.

Q: Why is MRS1504T3G marked "Not For New Designs"?

A: Part MRS1504T3G carries "Not For New Designs" product status, indicating that the manufacturer (onsemi) is not recommending this part for new circuit designs. Although the part matches electrical specifications and remains available in inventory (332,700 pieces), new designs should select from Active status alternatives such as S2G-E3/5BT, S2GHE3_A/H, or S2GHE3_A/I.

Q: What is the difference in recovery time between standard and fast recovery options?

A: The S2G-M3/5BT has a standard recovery time of 2 µs (2000 ns). Fast recovery alternatives such as ER1G-LTP (35 ns) and ES2G-13-F (35 ns) provide significantly faster switching characteristics. Faster recovery reduces switching losses and electromagnetic interference in high-frequency applications. Selection depends on circuit operating frequency and performance requirements.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts listed are supplied in DO-214AA (SMB) surface mount package, maintaining mechanical and thermal compatibility with S2G-M3/5BT. Packaging format (Cut Tape, Tape & Reel, or Digi-Reel®) varies by part number and supplier, affecting assembly line compatibility and inventory management.

Q: What is the moisture sensitivity level for all parts?

A: All parts listed, including S2G-M3/5BT and all substitutes, carry MSL 1 (Unlimited) moisture sensitivity rating. This classification indicates no moisture sensitivity precautions are required during storage, handling, or assembly.

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