S4A R6 Equivalent & Substitute Parts

Part Overview

The S4A R6 is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 4 A average rectified current in a DO-214AB surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 4 A
Reverse Recovery Time (trr)	1.5 µs
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Capacitance @ Vr, F	60 pF @ 4 V, 1 MHz
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Standard Recovery
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S4A R6 is determined by matching the following critical parameters:

Parametric Equivalents maintain identical electrical specifications across all key parameters: 50 V reverse voltage rating, 4 A average rectified current, 1.15 V forward voltage at 4 A, 1.5 µs reverse recovery time, 10 µA reverse leakage current, and DO-214AB package configuration. These parts are direct functional replacements with no derating required.

Similar Parts share the same voltage rating (50 V) and package (DO-214AB) but differ in current rating or recovery characteristics. The RS3AHE3_A/I operates at 3 A average rectified current with faster recovery characteristics (150 ns trr), representing a lower current capacity variant suitable for applications with reduced current requirements.

Parameter Comparison

Parameter	S4A R6	S4A	S4A V7G	RS3AHE3_A/I
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	4 A	4 A	4 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 4 A	1.15 V @ 4 A	1.15 V @ 4 A	1.3 V @ 2.5 A
Reverse Recovery Time (trr)	1.5 µs	1.5 µs	1.5 µs	150 ns
Current - Reverse Leakage @ Vr	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V	10 µA @ 50 V
Capacitance @ Vr, F	60 pF @ 4 V, 1 MHz	60 pF @ 4 V, 1 MHz	60 pF @ 4 V, 1 MHz	44 pF @ 4 V, 1 MHz
Package / Case	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Discontinued at DiGi Electronics	Active	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Bulk	Tape & Reel (TR)	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

The S4A (Taiwan Semiconductor Corporation) is the primary active equivalent to the S4A R6. This part maintains identical electrical specifications and is currently in active product status with 781 pieces in stock. The S4A is available in Tape & Reel packaging, suitable for automated assembly processes. Both parts are ROHS3 compliant with MSL 1 rating.

The S4A V7G (Taiwan Semiconductor Corporation) is an alternative parametric equivalent with identical electrical characteristics but is discontinued at DiGi Electronics. This part carries 1903 pieces in inventory and is available in bulk packaging. Selection of this part should account for its discontinued status.

For Current-Reduced Applications (Similar Part):

The RS3AHE3_A/I (Vishay General Semiconductor - Diodes Division) is suitable for applications where the 4 A current requirement can be reduced to 3 A. This part features faster recovery characteristics (150 ns trr versus 1.5 µs) and is AEC-Q101 qualified for automotive applications. The RS3AHE3_A/I is in active product status with 891 pieces in stock and is available in Tape & Reel packaging. Forward voltage is higher at 1.3 V @ 2.5 A compared to 1.15 V @ 4 A for the S4A R6.

Frequently Asked Questions (FAQ)

Q: Can the S4A directly replace the S4A R6?

A: Yes. The S4A is a parametric equivalent with identical voltage rating (50 V), current rating (4 A), forward voltage (1.15 V @ 4 A), reverse recovery time (1.5 µs), and reverse leakage current (10 µA @ 50 V). Both use the DO-214AB package. The S4A is in active product status.

Q: What is the difference between the S4A R6 and S4A V7G?

A: Both parts are parametric equivalents with identical electrical specifications. The primary difference is product status: S4A R6 and S4A V7G are both discontinued at DiGi Electronics, while the S4A is active. Packaging differs: S4A V7G is available in bulk, while S4A is available in Tape & Reel.

Q: Can the RS3AHE3_A/I replace the S4A R6 in all applications?

A: The RS3AHE3_A/I shares the same 50 V voltage rating and DO-214AB package but operates at 3 A average rectified current versus 4 A for the S4A R6. This part is suitable only for applications where the current requirement does not exceed 3 A. The RS3AHE3_A/I features faster recovery (150 ns versus 1.5 µs) and higher forward voltage (1.3 V @ 2.5 A versus 1.15 V @ 4 A).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The S4A, S4A V7G, and RS3AHE3_A/I are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What packaging options are available for equivalent parts?

A: The S4A is available in Tape & Reel (TR) packaging for automated assembly. The S4A V7G is available in bulk packaging. The RS3AHE3_A/I is available in Tape & Reel (TR) packaging.

Q: Does the RS3AHE3_A/I have automotive qualification?

A: Yes. The RS3AHE3_A/I is AEC-Q101 qualified, indicating suitability for automotive applications. The S4A and S4A V7G do not carry automotive qualification.

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