Equivalent & Substitute Parts for RS3B-M3/9AT

Part Overview

The RS3B-M3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 100 V DC reverse voltage with 3 A average rectified current in a DO-214AB (SMC) package. The part is currently active in production with 859 pieces in stock.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple suppliers is needed for supply chain continuity. The substitute parts listed maintain electrical compatibility within the specified parameter ranges while offering variations in packaging, manufacturer, and performance characteristics.

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 V @ 2.5 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10	µA @ 100 V
Capacitance @ Vr, F	44	pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the RS3B-M3/9AT are grouped based on electrical parameter compatibility and packaging format. The primary substitution criteria are:

Electrical Parameters (Must Match):

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Technology: Standard
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Parameters (Allow Variation Within Functional Limits):

Voltage - Forward (Vf) (Max) @ If: Variations permitted
Reverse Recovery Time (trr): Variations permitted (Fast Recovery or Standard Recovery acceptable)
Current - Reverse Leakage @ Vr: Variations permitted
Capacitance @ Vr, F: Variations permitted
Operating Temperature - Junction: Extended ranges acceptable

Packaging Format Variations:

Tape & Reel (TR)
Cut Tape (CT)
Cut Tape (CT) & Digi-Reel®

All substitute parts maintain the same functional electrical ratings and surface mount package format, ensuring direct compatibility in circuit applications while accommodating different procurement and assembly requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Packaging Format	Product Status
RS3B-M3/9AT	Vishay General Semiconductor - Diodes Division	100	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	DO-214AB, SMC	Tape & Reel (TR)	Active
RS3B-E3/57T	Vishay General Semiconductor - Diodes Division	100	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	DO-214AB, SMC	Cut Tape (CT)	Active
ES3B	Taiwan Semiconductor Corporation	100	3	0.95 @ 3 A	Fast Recovery ≤ 500ns	35	10 @ 100 V	DO-214AB, SMC	Not Specified	Active
ES3B-13-F	Diodes Incorporated	100	3	0.9 @ 3 A	Fast Recovery ≤ 500ns	25	10 @ 100 V	DO-214AB, SMC	Tape & Reel (TR)	Active
RS3B-13-F	Diodes Incorporated	100	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 100 V	DO-214AB, SMC	Tape & Reel (TR)	Active
S3B-13-F	Diodes Incorporated	100	3	1.15 @ 3 A	Standard Recovery >500ns	Not Specified	10 @ 100 V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Active
RS3B R7G	Taiwan Semiconductor Corporation	100	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	DO-214AB, SMC	Cut Tape (CT)	Discontinued at DiGi Electronics
RS3B V7G	Taiwan Semiconductor Corporation	100	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	DO-214AB, SMC	Cut Tape (CT) & Digi-Reel®	Discontinued at DiGi Electronics

Engineering Selection Recommendations

Primary Substitutes (Active Status, Highest Availability):

The RS3B-E3/57T from Vishay General Semiconductor - Diodes Division is the direct parametric equivalent to the RS3B-M3/9AT. Both parts share identical electrical specifications and differ only in packaging format (Cut Tape versus Tape & Reel). This substitute is recommended when Cut Tape packaging is acceptable for assembly processes. Inventory availability is significantly higher at 30,300 pieces.

The ES3B-13-F from Diodes Incorporated and ES3B from Taiwan Semiconductor Corporation are manufacturer-recommended alternatives that maintain the 100 V / 3 A electrical ratings. These parts feature improved reverse recovery time characteristics (25 ns and 35 ns respectively, compared to 150 ns for the primary part) and lower forward voltage drop, making them suitable for applications where reduced switching losses are beneficial. Both are in active production with substantial inventory.

The RS3B-13-F from Diodes Incorporated is a manufacturer-recommended substitute that maintains identical electrical performance to the RS3B-M3/9AT while offering lower reverse leakage current (5 µA versus 10 µA) and an extended operating temperature range (-65°C to 150°C versus -55°C to 150°C). This part is in active production with 9,100 pieces available.

Secondary Substitutes (Active Status, Alternative Characteristics):

The S3B-13-F from Diodes Incorporated is an active substitute with standard recovery speed characteristics (>500ns) rather than fast recovery. This part is suitable for applications where recovery speed is not a critical parameter. It offers the highest inventory availability at 30,100 pieces and is available in Cut Tape & Digi-Reel® packaging.

Discontinued Parts (Not Recommended for New Designs):

The RS3B R7G and RS3B V7G from Taiwan Semiconductor Corporation are discontinued at DiGi Electronics and should not be selected for new designs. These parts are listed for reference only in legacy system support scenarios.

Compliance and Certification:

All active substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), REACH Unaffected status, and identical ECCN and HTSUS classifications as the primary part. All parts are suitable for direct substitution from a regulatory and environmental compliance perspective.

Frequently Asked Questions (FAQ)

Q: Can RS3B-E3/57T be used as a direct replacement for RS3B-M3/9AT?

A: Yes. The RS3B-E3/57T is a parametric equivalent with identical electrical specifications. The only difference is packaging format: RS3B-E3/57T is supplied in Cut Tape (CT) format while RS3B-M3/9AT is supplied in Tape & Reel (TR) format. Both are suitable for surface mount assembly processes.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes have a reverse recovery time of 500 nanoseconds or less, while standard recovery diodes exceed 500 nanoseconds. The RS3B-M3/9AT features fast recovery (150 ns), while the S3B-13-F features standard recovery (>500ns). Fast recovery diodes are preferred in high-frequency switching applications to minimize switching losses and electromagnetic interference.

Q: Are the ES3B and ES3B-13-F interchangeable?

A: Both parts meet the 100 V / 3 A electrical requirements and share the same DO-214AB (SMC) package. However, they differ in reverse recovery time (35 ns versus 25 ns) and forward voltage drop characteristics. The ES3B-13-F offers superior performance with faster recovery and lower forward voltage. Verify application requirements before substitution.

Q: Why do some substitute parts have lower forward voltage drops?

A: Forward voltage drop variations result from different semiconductor manufacturing processes and die designs among manufacturers. Lower forward voltage drops (such as 0.9 V in ES3B-13-F versus 1.3 V in RS3B-M3/9AT) reduce power dissipation in the diode, which is beneficial in high-current applications. However, the RS3B-M3/9AT specification of 1.3 V @ 2.5 A remains within acceptable limits for most general-purpose rectification applications.

Q: Can I use S3B-13-F in place of RS3B-M3/9AT?

A: Yes, with application consideration. The S3B-13-F maintains the same 100 V / 3 A ratings and DO-214AB (SMC) package. The primary difference is recovery speed: S3B-13-F uses standard recovery (>500ns) while RS3B-M3/9AT uses fast recovery (150 ns). For low-frequency rectification applications, standard recovery is acceptable. For high-frequency switching circuits, fast recovery characteristics are preferred.

Q: What does Moisture Sensitivity Level 1 (Unlimited) mean?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. The part does not require special moisture-controlled storage or handling procedures and can be stored under standard conditions indefinitely without degradation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and suitable for use in applications requiring RoHS compliance. No lead-free or halogen-free alternatives are required.

Q: Why is RS3B R7G listed as discontinued?

A: RS3B R7G is marked as discontinued at DiGi Electronics, indicating it is no longer actively stocked or recommended for new designs. This part is referenced for legacy system support only. For new designs, select from the active status alternatives.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR), Cut Tape (CT), and Cut Tape & Digi-Reel® (CT & Digi-Reel®). Selection depends on assembly equipment compatibility and procurement requirements. All formats contain the same DO-214AB (SMC) component package.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All substitute parts meet identical electrical specifications for voltage, current, and package format. Mixing manufacturers is acceptable from an electrical compatibility perspective. However, verify that procurement, quality assurance, and supply chain processes accommodate multiple suppliers.

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