S3B-TP Equivalent & Substitute Parts

Part Overview

The S3B-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute components is necessary for design continuity, inventory management, and ongoing production support for existing applications utilizing this diode.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 3 A	V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 100 V
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

Substitute parts for the S3B-TP are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Current - Reverse Leakage @ Vr: 10 µA @ 100 V
Operating Temperature - Junction: -55°C minimum to 150°C maximum
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Considerations:

Package / Case compatibility: DO-214AB (SMC) or DO-214AA (SMB)
Recovery Speed: Standard or Fast Recovery
Forward Voltage characteristics

Substitutes are classified into three categories:

Direct Substitutes (Same Package - DO-214AB SMC): Parts maintaining identical package form factor with equivalent electrical ratings.

Upgrade Substitutes (Alternative Package - DO-214AA SMB): Parts with improved or equivalent electrical characteristics but different package geometry, requiring PCB layout modification.

Similar Substitutes (Extended Temperature Range): Parts with enhanced temperature operating range or improved electrical characteristics, suitable for demanding applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Ir @ Vr [µA]	Package	Temp Range [°C]	Status
S3B-TP	Micro Commercial Co	100	3	1.2 @ 3 A	Standard >500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Not For New Designs
ES3BB-13-F	Diodes Incorporated	100	3	0.9 @ 3 A	Fast ≤500ns	10 @ 100 V	DO-214AA SMB	-55 to 150	Active
RS3B-E3/57T	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	Fast ≤500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
RS3B-E3/9AT	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	Fast ≤500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
RS3B-M3/57T	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	Fast ≤500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
RS3B-M3/9AT	Vishay General Semiconductor	100	3	1.3 @ 2.5 A	Fast ≤500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
S3B-E3/57T	Vishay General Semiconductor	100	3	1.15 @ 2.5 A	Standard >500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
S3B-E3/9AT	Vishay General Semiconductor	100	3	1.15 @ 2.5 A	Standard >500ns	10 @ 100 V	DO-214AB SMC	-55 to 150	Active
S3BB-13-F	Diodes Incorporated	100	3	1.15 @ 3 A	Standard >500ns	10 @ 100 V	DO-214AA SMB	-65 to 150	Active
CMR3U-01 BK PBFREE	Central Semiconductor Corp	100	3	1.0 @ 3 A	Fast ≤500ns	5 @ 100 V	DO-214AB SMC	-65 to 175	Active
CMR3U-01 TR13 PBFREE	Central Semiconductor Corp	100	3	1.0 @ 3 A	Fast ≤500ns	5 @ 100 V	DO-214AB SMC	-65 to 175	Active

Engineering Selection Recommendations

For Direct Package Replacement (DO-214AB SMC):

The Vishay General Semiconductor RS3B series (RS3B-E3/57T, RS3B-E3/9AT, RS3B-M3/57T, RS3B-M3/9AT) and S3B series (S3B-E3/57T, S3B-E3/9AT) provide pin-compatible alternatives in the same DO-214AB SMC package. All are ROHS3 compliant with MSL 1 rating. The RS3B variants feature fast recovery characteristics (≤500ns), while the S3B variants maintain standard recovery (>500ns) matching the original S3B-TP behavior. Both Vishay options are in Active product status.

The Central Semiconductor CMR3U-01 series (both BK PBFREE and TR13 PBFREE variants) offers the same package with extended operating temperature range (-65°C to 175°C) and improved reverse leakage characteristics (5 µA @ 100 V). These parts are Active status and suitable for applications requiring enhanced thermal performance.

For Package Upgrade (DO-214AA SMB):

The Diodes Incorporated S3BB-13-F and ES3BB-13-F provide electrical equivalence with a larger SMB package footprint. The S3BB-13-F maintains standard recovery characteristics and extends the minimum operating temperature to -65°C. The ES3BB-13-F features fast recovery (≤500ns) with improved forward voltage (0.9 V @ 3 A). Both are Active status and ROHS3 compliant. Package upgrade requires PCB layout modification.

Compliance and Status Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with existing manufacturing processes. The original S3B-TP is classified as "Not For New Designs," making transition to Active-status alternatives necessary for ongoing production. Vishay, Diodes Incorporated, and Central Semiconductor options are all currently Active, providing long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace S3B-TP with any of the Vishay RS3B or S3B variants?

A: Yes, for applications using the DO-214AB SMC package. The RS3B-E3/57T, RS3B-E3/9AT, RS3B-M3/57T, RS3B-M3/9AT, S3B-E3/57T, and S3B-E3/9AT are all pin-compatible with identical voltage and current ratings. Verify recovery speed requirements: RS3B variants are fast recovery (≤500ns), while S3B variants are standard recovery (>500ns), matching the original S3B-TP.

Q: What is the difference between the Vishay S3B-E3/57T and RS3B-E3/57T?

A: Both are DO-214AB SMC packages with 100 V / 3 A ratings. The primary difference is recovery speed: S3B-E3/57T is standard recovery (>500ns, trr 2.5 µs) with forward voltage of 1.15 V @ 2.5 A, while RS3B-E3/57T is fast recovery (≤500ns, trr 150 ns) with forward voltage of 1.3 V @ 2.5 A. Select based on circuit switching frequency requirements.

Q: Why would I choose the Central Semiconductor CMR3U-01 over other options?

A: The CMR3U-01 series offers extended operating temperature range (-65°C to 175°C versus -55°C to 150°C) and lower reverse leakage current (5 µA @ 100 V versus 10 µA @ 100 V). These characteristics suit applications in high-temperature environments or those requiring superior leakage performance. Both BK PBFREE (Bulk) and TR13 PBFREE (Tape & Reel) packaging options are available.

Q: Can I use the Diodes Incorporated S3BB-13-F as a direct replacement?

A: The S3BB-13-F is electrically equivalent but uses the DO-214AA SMB package instead of DO-214AB SMC. This requires PCB layout modification due to different pad geometry and spacing. The part is suitable as an upgrade option with extended minimum temperature (-65°C) and is Active status.

Q: What are the packaging differences between SMC and SMB?

A: SMC (DO-214AB) and SMB (DO-214AA) are both surface mount packages but differ in physical dimensions and pad layout. SMC is smaller and more compact, while SMB is larger. Substitution between these packages requires PCB redesign. Verify your PCB layout constraints before selecting an alternative package type.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original S3B-TP specifications. This ensures compatibility with standard manufacturing and storage processes.

Q: What does "Not For New Designs" mean for the S3B-TP?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. While existing inventory may be available, long-term supply is not guaranteed. Transition to Active-status alternatives (Vishay, Diodes Incorporated, or Central Semiconductor options) is recommended for design continuity and production support.

Q: How do I choose between standard and fast recovery diodes?

A: Standard recovery diodes (>500ns) are suitable for low-frequency applications (50/60 Hz power supplies, general rectification). Fast recovery diodes (≤500ns) are required for higher-frequency switching applications (switch-mode power supplies, inverters). Verify your circuit's switching frequency before selecting recovery speed.

Q: What is reverse recovery time (trr) and why does it matter?

A: Reverse recovery time is the duration required for a diode to stop conducting in the reverse direction after the forward current is removed. Shorter trr reduces switching losses and electromagnetic interference in high-frequency circuits. The S3B-TP has trr >500ns (standard), while fast recovery alternatives have trr ≤500ns or specified values (e.g., 25 ns, 150 ns).

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