S3KHE3_A/I Equivalent & Substitute Parts

Part Overview

The S3KHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 800 V DC reverse voltage with a 3 A average rectified current rating in a DO-214AB (SMC) package. The part is currently active in production with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Equivalent and substitute parts are identified to address supply chain requirements, packaging format preferences, or performance parameter variations while maintaining functional compatibility within specified electrical and mechanical constraints.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	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 @ 800 V
Capacitance @ Vr, F	60	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the S3KHE3_A/I are classified into three categories based on electrical and mechanical compatibility:

Parametric Equivalents (800 V, 3 A Rating): Parts that maintain identical voltage and current specifications with the same DO-214AB package. These parts differ only in packaging format (Tape & Reel versus Cut Tape) or minor manufacturing variations. Parametric equivalents include S3K-E3/57T, S3K-E3/9AT, and S3K V7G. All maintain the 800 V reverse voltage, 3 A rectified current, and standard recovery characteristics.

Upgrade Parts (Higher Voltage Rating): Parts that exceed the original voltage specification while maintaining or improving current and thermal performance. These include S3K-13-F (Diodes Incorporated), S3M (Diotec Semiconductor), S3M-TP (Micro Commercial Co), and STTH310S (STMicroelectronics). These parts operate at 1000 V reverse voltage with 3 A current rating, providing enhanced voltage margin for applications requiring higher transient protection.

Key Parameters Determining Substitution:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 800 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Package / Case: Must be DO-214AB (SMC) for mechanical compatibility
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass -55°C to 150°C minimum

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [µs]	Ir @ Vr [µA]	Package	Packaging Format	Temp Range [°C]	Product Status
S3KHE3_A/I	Vishay	800	3	1.15 @ 2.5	2.5	10 @ 800	DO-214AB	Tape & Reel	-55 to 150	Active
S3K-E3/57T	Vishay	800	3	1.15 @ 2.5	2.5	10 @ 800	DO-214AB	Cut Tape & Digi-Reel	-55 to 150	Active
S3K-E3/9AT	Vishay	800	3	1.15 @ 2.5	2.5	10 @ 800	DO-214AB	Tape & Reel	-55 to 150	Active
S3K V7G	Taiwan Semiconductor	800	3	1.15 @ 3	1.5	10 @ 800	DO-214AB	Cut Tape	-55 to 150	Discontinued at DiGi Electronics
S3K-13-F	Diodes Incorporated	800	3	1.15 @ 3	—	10 @ 800	DO-214AB	Tape & Reel	-65 to 150	Active
S3M	Diotec Semiconductor	1000	3	1.15 @ 3	1.5	5 @ 1000	DO-214AB	Cut Tape & Digi-Reel	-50 to 150	Active
S3M-TP	Micro Commercial Co	1000	3	1.2 @ 3	—	10 @ 1000	DO-214AB	Tape & Reel	-55 to 150	Active
STTH310S	STMicroelectronics	1000	3	1.7 @ 3	0.075	10 @ 1000	DO-214AB	Cut Tape & Digi-Reel	-40 to 175	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): S3K-E3/57T and S3K-E3/9AT are direct parametric equivalents to S3KHE3_A/I. Both maintain 800 V reverse voltage, 3 A current rating, and identical thermal characteristics. Selection between these parts depends on packaging format availability: S3K-E3/57T is supplied in Cut Tape & Digi-Reel format, while S3K-E3/9AT is supplied in Tape & Reel format matching the original part. Both are active products with ROHS3 compliance and AEC-Q101 automotive qualification status.

For Enhanced Voltage Margin Applications: S3M-TP (Micro Commercial Co) and S3K-13-F (Diodes Incorporated) provide 1000 V reverse voltage rating while maintaining 3 A current capacity. S3M-TP is recommended for applications requiring higher transient voltage protection with active product status and ROHS3 compliance. S3K-13-F offers extended operating temperature range (-65°C to 150°C) and higher inventory availability (87,200 units).

For Fast Recovery Applications: STTH310S (STMicroelectronics) features fast recovery characteristics (75 ns reverse recovery time) compared to standard recovery (2.5 µs) of the original part. This part operates at 1000 V with extended temperature range (-40°C to 175°C) and is suitable for high-frequency switching applications. Forward voltage is elevated at 1.7 V @ 3 A, which must be evaluated for thermal dissipation impact.

Avoid Selection: S3K V7G is discontinued at DiGi Electronics and should not be selected for new designs despite parametric equivalence.

Frequently Asked Questions (FAQ)

Q: Can S3K-E3/57T replace S3KHE3_A/I directly in production?

A: Yes. S3K-E3/57T is a parametric equivalent with identical electrical specifications (800 V, 3 A, 2.5 µs recovery time) and the same DO-214AB package. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Verify that your assembly equipment accommodates the packaging format before implementation.

Q: What is the difference between S3K-13-F and S3M-TP?

A: S3K-13-F (Diodes Incorporated) maintains the original 800 V rating with extended temperature range (-65°C to 150°C). S3M-TP (Micro Commercial Co) increases voltage rating to 1000 V with standard temperature range (-55°C to 150°C). Select S3K-13-F for low-temperature applications; select S3M-TP for higher voltage transient protection.

Q: Is STTH310S suitable for direct replacement?

A: STTH310S is mechanically compatible (DO-214AB package) and electrically superior in voltage rating (1000 V) and recovery speed (75 ns fast recovery). However, forward voltage is significantly higher (1.7 V @ 3 A versus 1.15 V @ 2.5 A), resulting in increased power dissipation. Thermal analysis is required before substitution.

Q: Why are some substitute parts rated at 1000 V instead of 800 V?

A: Higher voltage-rated parts (S3M, S3M-TP, STTH310S) provide enhanced transient overvoltage protection and improved reliability margins in applications subject to voltage spikes. These parts are electrically compatible with 800 V applications and can be used as upgrades without circuit modification.

Q: What does "Discontinued at DiGi Electronics" mean for S3K V7G?

A: S3K V7G is no longer actively distributed through DiGi Electronics, indicating limited future availability. Although parametrically equivalent, this part should not be selected for new designs. Use S3K-E3/57T or S3K-E3/9AT as active alternatives.

Q: Are all substitute parts ROHS3 compliant?

A: S3KHE3_A/I, S3K-E3/57T, S3K-E3/9AT, S3K-13-F, S3M-TP, and STTH310S are ROHS3 compliant. S3M (Diotec Semiconductor) has "Not applicable" RoHS status. Verify compliance requirements for your application before selecting S3M.

Q: Can I use S3M or S3M-TP in automotive applications?

A: S3KHE3_A/I carries AEC-Q101 automotive qualification. S3M-TP is ROHS3 compliant and active but does not specify AEC-Q101 qualification in the provided data. S3M does not specify automotive qualification. Confirm automotive qualification requirements with your quality department before substitution in automotive designs.

Q: What is the inventory status of substitute parts?

A: S3K-E3/57T has 10,293 units in stock. S3K-E3/9AT has 4,430 units. S3K-13-F has 87,200 units (highest availability). S3M-TP has 321,300 units (largest inventory). STTH310S has 17,310 units. S3K V7G has only 2,395 units and is discontinued.

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