S3MHE3/9AT Equivalent & Substitute Parts

Part Overview

The S3MHE3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1000 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement continuity. The diode is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2.5 A	V
Reverse Recovery Time (trr)	2.5	µs
Current - Reverse Leakage @ Vr	10	µA @ 1000 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Technology	Standard Recovery	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the S3MHE3/9AT is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Voltage - Forward (Vf) (Max): Must not exceed specified limits at rated current
Reverse Recovery Time (trr): Standard recovery technology (>500 ns) acceptable
Current - Reverse Leakage: Must not exceed 10 µA @ rated voltage
Operating Temperature Range: Must encompass -55°C to 150°C minimum

Mechanical Compatibility Criteria:

Package / Case: DO-214AB (SMC) form factor required
Mounting Type: Surface Mount
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Automotive Grade and AEC-Q101 qualification preferred for direct replacement

Substitute parts are grouped into three categories: Direct Parametric Equivalents (identical electrical and mechanical specifications from Vishay), Upgrade Alternatives (enhanced specifications from alternative manufacturers), and Manufacturer-Recommended Alternatives (lower voltage rating or different recovery characteristics).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [µs/ns]	Ir @ Vr [µA]	Package	Status	Automotive Grade
S3MHE3/9AT	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Obsolete	Yes (AEC-Q101)
S3MHE3_A/I	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	Yes (AEC-Q101)
S3M-E3/57T	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	No
S3M-E3/9AT	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	No
S3M-M3/57T	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	No
S3M-M3/9AT	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	No
S3MHE3_A/H	Vishay	1000	3	1.15 @ 2.5A	2.5 µs	10 @ 1000V	DO-214AB	Active	Yes (AEC-Q101)
S3M-13-F	Diodes Inc.	1000	3	1.15 @ 3A	2.5 µs	10 @ 1000V	DO-214AB	Active	No
S3K-13-F	Diodes Inc.	800	3	1.15 @ 3A	2.5 µs	10 @ 800V	DO-214AB	Active	No
STTH310S	STMicroelectronics	1000	3	1.7 @ 3A	75 ns	10 @ 1000V	DO-214AB	Active	No
ACGRC307-HF	Comchip	1000	3	1.15 @ 3A	2.5 µs	5 @ 1000V	DO-214AB	Active	Yes (AEC-Q101)

Engineering Selection Recommendations

Direct Replacement (Preferred for Obsolete Part Mitigation):

S3MHE3_A/I and S3MHE3_A/H are direct parametric equivalents manufactured by Vishay with identical electrical specifications and automotive AEC-Q101 qualification. Both parts are in active production status. S3MHE3_A/I is available in Tape & Reel packaging with 5600 units in stock. S3MHE3_A/H is available in Tape & Reel packaging with 21650 units in stock. These parts provide the highest confidence for direct substitution in existing designs.

Vishay Parametric Equivalents (Active Production):

S3M-E3/57T, S3M-E3/9AT, S3M-M3/57T, and S3M-M3/9AT are electrically identical to the main part and available in active production. These parts differ in packaging format (Cut Tape or Tape & Reel variants) and do not carry automotive grade designation. Selection among these variants depends on procurement packaging requirements and inventory availability.

Alternative Manufacturer - Equivalent Voltage Rating:

S3M-13-F (Diodes Incorporated) maintains the 1000 V rating and 3 A current specification with identical forward voltage characteristics. This part is available in Cut Tape & Digi-Reel packaging with 15100 units in stock and is suitable for applications where manufacturer diversity is required.

ACGRC307-HF (Comchip Technology) provides 1000 V and 3 A ratings with automotive AEC-Q101 qualification. This part exhibits lower reverse leakage current (5 µA versus 10 µA) and reduced junction capacitance (20 pF versus 60 pF), making it suitable for high-frequency or low-leakage applications. 713 units are in stock.

Alternative Manufacturer - Reduced Voltage Rating:

S3K-13-F (Diodes Incorporated) operates at 800 V maximum reverse voltage with identical 3 A current rating. This part is suitable only for applications where the circuit design voltage does not exceed 800 V. The part is available in Tape & Reel packaging with 87200 units in stock, providing high availability.

Fast Recovery Alternative:

STTH310S (STMicroelectronics) maintains 1000 V and 3 A ratings but features fast recovery technology (75 ns trr versus 2.5 µs standard recovery). Forward voltage is elevated to 1.7 V at 3 A. This part is suitable for high-frequency switching applications where reduced reverse recovery time is beneficial. 17310 units are in stock.

Frequently Asked Questions (FAQ)

Q: Can S3MHE3_A/I or S3MHE3_A/H be used as direct replacements for the obsolete S3MHE3/9AT?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (1000 V, 3 A, 1.15 V forward voltage, 2.5 µs recovery time) and automotive AEC-Q101 qualification. The primary difference is packaging format (Tape & Reel variants). Both are in active production.

Q: What is the difference between S3M-E3/57T and S3MHE3_A/I?

A: Both parts are electrically identical with 1000 V, 3 A, and 2.5 µs recovery time specifications. S3M-E3/57T is supplied in Cut Tape format with 34200 units in stock. S3MHE3_A/I is supplied in Tape & Reel format with 5600 units in stock. S3MHE3_A/I carries automotive AEC-Q101 qualification; S3M-E3/57T does not.

Q: Can STTH310S replace S3MHE3/9AT in all applications?

A: STTH310S maintains the 1000 V and 3 A ratings but differs in two critical parameters: forward voltage increases to 1.7 V (versus 1.15 V), and reverse recovery time decreases to 75 ns (fast recovery versus 2.5 µs standard recovery). This part is suitable for high-frequency switching applications but may increase power dissipation in linear rectification circuits. Thermal and circuit performance analysis is required.

Q: Is S3K-13-F suitable as a replacement?

A: S3K-13-F is suitable only for applications where the maximum reverse voltage requirement does not exceed 800 V. The part is rated for 800 V maximum, which is 200 V below the S3MHE3/9AT specification. Use this part only if circuit design voltage is confirmed to be 800 V or lower.

Q: What is the advantage of ACGRC307-HF over other substitutes?

A: ACGRC307-HF maintains full 1000 V and 3 A ratings with automotive AEC-Q101 qualification. It exhibits lower reverse leakage current (5 µA versus 10 µA) and significantly reduced junction capacitance (20 pF versus 60 pF). These characteristics make it suitable for high-frequency applications or designs sensitive to leakage current. Trade-off: only 713 units are in stock.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) affects procurement and assembly logistics only. Electrical performance is determined by the semiconductor die and internal construction, which are identical across packaging variants of the same part number base.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the main part S3MHE3/9AT.

Q: Which substitute offers the highest inventory availability?

A: S3K-13-F (Diodes Incorporated) offers the highest inventory with 87200 units in stock. However, this part is rated for 800 V maximum and is suitable only for applications not requiring 1000 V rating. For 1000 V applications, S3M-E3/57T offers the highest availability at 34200 units.

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