RS3B R6 Equivalent & Substitute Parts

Part Overview

The RS3B R6 is a general-purpose fast recovery rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design support and procurement.

The RS3B R6 operates across a junction temperature range of -55°C to 150°C with fast recovery characteristics (≤500 ns) and a reverse recovery time of 150 ns. It is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is suitable for standard industrial applications requiring general-purpose rectification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	V
Speed	Fast Recovery ≤500 ns, >200 mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10 @ 100 V	µA
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RS3B R6 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Reverse Recovery Time (trr): 150 ns
Speed: Fast Recovery ≤500 ns, >200 mA (Io)
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C

Secondary Compatibility Factors:

RoHS3 Compliance
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Forward Voltage (Vf) at rated current

Substitute parts are grouped into three categories:

Taiwan Semiconductor Corporation Standard Grade Parts (RS3B, RS3B R7G, RS3B V7G): Direct equivalents with identical electrical specifications and packaging options. These parts maintain the same base product characteristics with variations in packaging format (Tape & Reel, Cut Tape, or Cut Tape & Digi-Reel).
Taiwan Semiconductor Corporation Automotive Grade Part (RS3BH): Meets all electrical parameters of the RS3B R6 with additional AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade reliability.
Vishay General Semiconductor Diodes Division Parts (RS3B-E3/57T, RS3B-E3/9AT, RS3B-M3/57T, RS3B-M3/9AT, RS3BHE3_A/H): Meet all critical electrical parameters with variations in forward voltage measurement conditions (2.5 A vs. 3 A) and capacitance specifications. RS3BHE3_A/H includes AEC-Q101 automotive qualification.
Comchip Technology Part (RS3BC-HF): Meets all critical electrical parameters with lower reverse leakage current (5 µA vs. 10 µA) and specified capacitance characteristics.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Packaging Format	Product Status
RS3B R6	Taiwan Semiconductor	100	3	1.3 @ 3 A	150	10 @ 100 V	DO-214AB	—	Discontinued
RS3B	Taiwan Semiconductor	100	3	1.3 @ 3 A	150	10 @ 100 V	DO-214AB	Tape & Reel	Active
RS3B R7G	Taiwan Semiconductor	100	3	1.3 @ 3 A	150	10 @ 100 V	DO-214AB	Cut Tape	Discontinued
RS3B V7G	Taiwan Semiconductor	100	3	1.3 @ 3 A	150	10 @ 100 V	DO-214AB	Cut Tape & Digi-Reel	Discontinued
RS3BH	Taiwan Semiconductor	100	3	1.3 @ 3 A	150	10 @ 100 V	DO-214AB	—	Active
RS3B-E3/57T	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	150	10 @ 100 V	DO-214AB	Cut Tape	Active
RS3B-E3/9AT	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	150	10 @ 100 V	DO-214AB	Tape & Reel	Active
RS3B-M3/57T	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	150	10 @ 100 V	DO-214AB	Tape & Reel	Active
RS3B-M3/9AT	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	150	10 @ 100 V	DO-214AB	Tape & Reel	Active
RS3BC-HF	Comchip Technology	100	3	1.3 @ 3 A	150	5 @ 100 V	DO-214AB	Tape & Reel	Active
RS3BHE3_A/H	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	150	10 @ 100 V	DO-214AB	Tape & Reel	Active

Engineering Selection Recommendations

Primary Recommendation: RS3B (Taiwan Semiconductor Corporation)

The RS3B is the direct equivalent to the RS3B R6, maintaining identical electrical specifications and RoHS3 compliance. This part is currently active and available in Tape & Reel packaging with 2300 pieces in stock. Selection of RS3B eliminates any parametric deviation and provides the highest compatibility with the original design.

Alternative for Standard Industrial Applications: RS3BC-HF (Comchip Technology)

The RS3BC-HF meets all critical electrical parameters with the advantage of lower reverse leakage current (5 µA vs. 10 µA at 100 V). This part is active, RoHS3 compliant, and available in Tape & Reel format with 642 pieces in stock. The reduced leakage current may provide improved performance in low-power or high-impedance circuit applications.

Alternative for Automotive Applications: RS3BH (Taiwan Semiconductor Corporation)

The RS3BH is recommended for designs requiring automotive-grade reliability. This part maintains identical electrical specifications to the RS3B R6 and includes AEC-Q101 qualification. The RS3BH is currently active with 975 pieces in stock.

Alternative for Automotive Applications: RS3BHE3_A/H (Vishay General Semiconductor)

The RS3BHE3_A/H is an automotive-qualified alternative (AEC-Q101) from Vishay General Semiconductor. This part meets all critical electrical parameters and is available in Tape & Reel packaging with 778 pieces in stock.

Alternatives for High-Volume Procurement: Vishay General Semiconductor Series

The RS3B-E3/57T offers the highest inventory availability (30,300 pieces) among all substitutes. The RS3B-E3/9AT, RS3B-M3/57T, and RS3B-M3/9AT are all active parts from Vishay General Semiconductor meeting critical electrical specifications. These parts are suitable for applications where packaging format flexibility and high availability are priorities.

Discontinued Parts to Avoid: RS3B R7G and RS3B V7G

While RS3B R7G and RS3B V7G are parametric equivalents, both are discontinued at DiGi Electronics. These parts should not be selected for new designs or long-term procurement strategies.

Frequently Asked Questions (FAQ)

Q: Can the RS3B R6 be directly replaced with the RS3B?

A: Yes. The RS3B is a direct parametric equivalent with identical voltage rating (100 V), current rating (3 A), reverse recovery time (150 ns), and forward voltage characteristics (1.3 V @ 3 A). The primary difference is packaging format: RS3B is supplied in Tape & Reel format, while RS3B R6 was supplied in an unspecified format. Both are RoHS3 compliant with MSL 1 rating.

Q: What is the difference between RS3B-E3/9AT and RS3B-M3/9AT?

A: Both parts are from Vishay General Semiconductor and meet all critical electrical parameters (100 V, 3 A, 150 ns trr). The primary difference is capacitance specification: RS3B-E3/9AT specifies 44 pF @ 4V, 1MHz, while RS3B-M3/9AT specifies 34 pF @ 4V, 1MHz. Both are supplied in Tape & Reel format and are currently active.

Q: Is the RS3BC-HF suitable as a substitute?

A: Yes. The RS3BC-HF from Comchip Technology meets all critical electrical parameters and is RoHS3 compliant. The part features lower reverse leakage current (5 µA vs. 10 µA), which may be advantageous in certain circuit topologies. It is supplied in Tape & Reel format and is currently active.

Q: Should I select an automotive-qualified part if my application is not automotive?

A: Automotive-qualified parts (RS3BH, RS3BHE3_A/H) meet all electrical specifications required for standard industrial applications and are fully compatible. Selection of automotive-qualified parts introduces no technical disadvantage and may provide additional reliability margin. The decision should be based on cost and availability considerations.

Q: What is the significance of the forward voltage measurement condition difference (3 A vs. 2.5 A)?

A: The RS3B R6 specifies forward voltage as 1.3 V @ 3 A, while Vishay parts specify 1.3 V @ 2.5 A. Both specifications indicate the same maximum forward voltage (1.3 V) across the rated current range. The measurement condition difference reflects manufacturer characterization methodology and does not indicate incompatibility. Both parts are suitable for 3 A operation.

Q: Are there packaging format restrictions for my application?

A: The RS3B R6 and all substitute parts use the DO-214AB (SMC) surface mount package. Packaging format variations (Tape & Reel, Cut Tape, Cut Tape & Digi-Reel) affect procurement and assembly handling but do not alter electrical performance or PCB footprint compatibility. Selection should be based on assembly equipment requirements and procurement volume.

Q: Can I use RS3B R7G or RS3B V7G for new designs?

A: RS3B R7G and RS3B V7G are parametric equivalents but are discontinued at DiGi Electronics. These parts should not be selected for new designs or applications requiring long-term component availability. Active alternatives such as RS3B, RS3B-E3/57T, or RS3BC-HF are recommended.

Q: What is the difference between Taiwan Semiconductor and Vishay General Semiconductor versions?

A: Both manufacturers produce parts meeting identical electrical specifications (100 V, 3 A, 150 ns trr, 1.3 V forward voltage). Vishay parts include additional capacitance specifications and are available in higher quantities. Taiwan Semiconductor parts are available with automotive qualification (RS3BH). Selection between manufacturers should be based on availability, cost, and specific application requirements.

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