SL43HE3_A/I Equivalent & Substitute Parts

Part Overview

The SL43HE3_A/I is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 30 V DC reverse voltage and 4 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement. The device meets automotive-grade specifications with AEC-Q101 qualification and operates across a junction temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	4	A
Voltage - Forward (Vf) (Max) @ If	420 mV @ 4 A	mV
Current - Reverse Leakage @ Vr	500	µA @ 30 V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SL43HE3_A/I is determined by the following critical electrical and mechanical parameters:

Parametric Equivalents (identical electrical performance, different packaging or manufacturer variant):

Voltage rating: 30 V DC reverse
Current rating: 4 A average rectified
Forward voltage: 420 mV @ 4 A
Reverse leakage: 500 µA @ 30 V
Package: DO-214AB (SMC) surface mount
Speed classification: Fast Recovery ≤ 500ns

Parts meeting these criteria are direct parametric equivalents and may be substituted without circuit redesign.

Functional Alternatives (higher current or voltage rating, same package):

The SL43HE3_B/I provides 8 A current rating at 30 V, maintaining the same package and voltage specification. This part operates at higher current capacity and is suitable for applications requiring increased current handling.

Cross-Manufacturer Alternatives (different manufacturer, comparable specifications):

The LSM835J/TR13 from Microchip Technology provides 35 V and 8 A ratings in the same DO-214AB package. This part exceeds the voltage and current specifications of the main part and operates to 150°C junction temperature.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Ir @ Vr	Package	Temp Range	Status	Packaging Type
SL43HE3_A/I	Vishay	30 V	4 A	420 mV @ 4 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Discontinued	Bulk
SL43HE3_B/I	Vishay	30 V	8 A	470 mV @ 8 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Active	Tape & Reel
SL43-E3/57T	Vishay	30 V	4 A	420 mV @ 4 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Active	Cut Tape
SL43-E3/9AT	Vishay	30 V	4 A	420 mV @ 4 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Active	Tape & Reel
SL43-M3/57T	Vishay	30 V	4 A	420 mV @ 4 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Active	Tape & Reel
SL43-M3/9AT	Vishay	30 V	4 A	420 mV @ 4 A	500 µA @ 30 V	DO-214AB	-55 to 125°C	Active	Tape & Reel
LSM835J/TR13	Microchip	35 V	8 A	520 mV @ 8 A	2 mA @ 35 V	DO-214AB	-55 to 150°C	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The parts SL43-E3/57T, SL43-E3/9AT, SL43-M3/57T, and SL43-M3/9AT are parametric equivalents of the SL43HE3_A/I. All are manufactured by Vishay General Semiconductor - Diodes Division, maintain identical electrical specifications (30 V, 4 A, 420 mV forward voltage), and are housed in the same DO-214AB package. These parts are currently in active product status and carry ROHS3 compliance and AEC-Q101 automotive qualification. Selection among these equivalents depends on packaging requirements: Cut Tape (CT) for SL43-E3/57T or Tape & Reel (TR) for SL43-E3/9AT, SL43-M3/57T, and SL43-M3/9AT.

For Higher Current Applications:

The SL43HE3_B/I provides doubled current capacity (8 A) while maintaining the 30 V voltage rating and DO-214AB package. This part is suitable for applications requiring increased current handling within the same voltage envelope. Forward voltage increases to 470 mV at 8 A operation. This part is in active status with ROHS3 compliance and AEC-Q101 qualification.

For Enhanced Voltage and Temperature Margin:

The LSM835J/TR13 from Microchip Technology offers 35 V reverse voltage and 8 A current rating in the same DO-214AB package, with extended junction temperature range to 150°C. This part is suitable for applications requiring higher voltage headroom or elevated temperature operation. Note that this part is RoHS non-compliant and carries higher reverse leakage current (2 mA @ 35 V compared to 500 µA @ 30 V).

Frequently Asked Questions (FAQ)

Q: Can SL43-E3/57T, SL43-E3/9AT, SL43-M3/57T, or SL43-M3/9AT be used as direct replacements for SL43HE3_A/I?

A: Yes. These parts are parametric equivalents with identical voltage (30 V), current (4 A), forward voltage (420 mV @ 4 A), and reverse leakage (500 µA @ 30 V) specifications. All are housed in DO-214AB packages and operate across -55°C to 125°C. Selection depends on packaging format: Cut Tape or Tape & Reel.

Q: What is the difference between SL43-E3/57T and SL43-E3/9AT?

A: Both parts are parametrically identical. The difference is packaging: SL43-E3/57T is supplied in Cut Tape (CT) format, while SL43-E3/9AT is supplied in Tape & Reel (TR) format. Choose based on assembly line requirements.

Q: Can SL43HE3_B/I replace SL43HE3_A/I in all applications?

A: SL43HE3_B/I has doubled current capacity (8 A versus 4 A) and slightly higher forward voltage (470 mV @ 8 A versus 420 mV @ 4 A). It is suitable for replacement in applications where the circuit can tolerate the higher forward voltage drop and where the increased current rating does not create thermal or design conflicts. Voltage rating remains 30 V.

Q: Is LSM835J/TR13 a suitable replacement for SL43HE3_A/I?

A: LSM835J/TR13 is a functional alternative with higher voltage (35 V) and current (8 A) ratings in the same DO-214AB package. It is suitable for applications requiring voltage or current margin beyond the original specification. However, it exhibits higher reverse leakage (2 mA @ 35 V) and is RoHS non-compliant. Forward voltage is 520 mV @ 8 A.

Q: What packaging options are available for parametric equivalents?

A: Parametric equivalents are available in Cut Tape (CT) and Tape & Reel (TR) formats. SL43-E3/57T is supplied in Cut Tape. SL43-E3/9AT, SL43-M3/57T, and SL43-M3/9AT are supplied in Tape & Reel. Select based on assembly process requirements.

Q: Are all substitute parts automotive-qualified?

A: Vishay parts (SL43HE3_B/I, SL43-E3/57T, SL43-E3/9AT, SL43-M3/57T, SL43-M3/9AT) carry AEC-Q101 automotive qualification. LSM835J/TR13 from Microchip does not list AEC-Q101 qualification in the provided specifications.

Q: What is the temperature operating range for each substitute?

A: Vishay SL43 series parts operate from -55°C to 125°C junction temperature. LSM835J/TR13 operates from -55°C to 150°C, providing extended high-temperature capability.

Q: Do all substitute parts meet RoHS compliance?

A: Vishay SL43 series parts are ROHS3 compliant. LSM835J/TR13 is RoHS non-compliant according to the provided specifications.

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