S2B-TP Equivalent & Substitute Parts

Part Overview

The S2B-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that meet the same electrical and mechanical specifications for continued circuit design and production support.

Key Parameters

Parameter	S2B-TP Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.15 V @ 2 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	2 µs
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Capacitance @ Vr, F	30pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the S2B-TP is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 2 A
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Within circuit design tolerance
Speed: Standard or Fast Recovery acceptable
Reverse Recovery Time (trr): Within circuit design tolerance
Current - Reverse Leakage @ Vr: Within circuit design tolerance
Capacitance @ Vr, F: Within circuit design tolerance
Operating Temperature - Junction: Minimum -55°C to maximum 150°C acceptable

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical parameters) and Parametric Equivalents (meeting mandatory electrical and mechanical specifications with allowable variations in secondary characteristics).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Product Status
S2B-TP	Micro Commercial Co	100 V	2 A	1.15 V @ 2 A	Standard Recovery >500ns	2 µs	10 µA @ 100 V	DO-214AA, SMB	Discontinued
CGRB202-G	Comchip Technology	100 V	2 A	1.1 V @ 2 A	Fast Recovery ≤ 500ns	Not specified	5 µA @ 100 V	DO-214AA, SMB	Active
ES2B	YAGEO	100 V	2 A	0.95 V	Not specified	Not specified	Not specified	DO-214AA	Active
ES2B-13-F	Diodes Incorporated	100 V	2 A	920 mV @ 2 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 100 V	DO-214AA, SMB	Active
ES2B-E3/52T	Vishay General Semiconductor - Diodes Division	100 V	2 A	900 mV @ 2 A	Fast Recovery ≤ 500ns	30 ns	10 µA @ 100 V	DO-214AA, SMB	Active
ES2B-E3/5BT	Vishay General Semiconductor - Diodes Division	100 V	2 A	900 mV @ 2 A	Fast Recovery ≤ 500ns	30 ns	10 µA @ 100 V	DO-214AA, SMB	Active
RS2B	Taiwan Semiconductor Corporation	100 V	2 A	1.3 V @ 2 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 100 V	DO-214AA, SMB	Active
S2A	Diotec Semiconductor	50 V	2 A	1.15 V @ 2 A	Standard Recovery >500ns	1.5 µs	5 µA @ 50 V	DO-214AA, SMB	Active
S2B-13-F	Diodes Incorporated	100 V	1.5 A	1.15 V @ 1.5 A	Standard Recovery >500ns	Not specified	5 µA @ 100 V	DO-214AA, SMB	Active
S2B	Diotec Semiconductor	100 V	2 A	1.15 V @ 2 A	Standard Recovery >500ns	1.5 µs	5 µA @ 100 V	DO-214AA, SMB	Active

Engineering Selection Recommendations

Direct Equivalents (Full Substitution):

The following parts meet all mandatory electrical and mechanical specifications and are suitable for direct substitution in applications where the S2B-TP was originally specified:

S2B (Diotec Semiconductor): Parametric equivalent with identical voltage, current, and package specifications. Active product status with ROHS3 compliance and MSL 1 rating. Standard recovery speed matches original design.
CGRB202-G (Comchip Technology): Meets all mandatory parameters with 100 V, 2 A rating in DO-214AA package. Active status with ROHS3 compliance. Forward voltage is lower (1.1 V vs. 1.15 V), indicating improved efficiency characteristics.
ES2B-E3/52T (Vishay General Semiconductor - Diodes Division): Meets all mandatory parameters with 100 V, 2 A rating. Active status with ROHS3 compliance and MSL 1 rating. Forward voltage is lower (900 mV vs. 1.15 V). Cut Tape packaging available.
ES2B-E3/5BT (Vishay General Semiconductor - Diodes Division): Meets all mandatory parameters with 100 V, 2 A rating. Active status with ROHS3 compliance and MSL 1 rating. Forward voltage is lower (900 mV vs. 1.15 V). Tape & Reel packaging available.

Conditional Equivalents (Application-Dependent Substitution):

The following parts meet mandatory electrical specifications but have variations in secondary characteristics that require circuit design verification:

ES2B-13-F (Diodes Incorporated): Meets voltage and package requirements with 100 V, 2 A rating. Active status with ROHS3 compliance. Forward voltage is significantly lower (920 mV vs. 1.15 V), and reverse recovery time is substantially faster (25 ns vs. 2 µs). Suitable for applications where improved switching performance is beneficial.
RS2B (Taiwan Semiconductor Corporation): Meets voltage and package requirements with 100 V, 2 A rating. Active status with ROHS3 compliance. Forward voltage is higher (1.3 V vs. 1.15 V), and reverse recovery time is faster (150 ns vs. 2 µs). Suitable for applications where forward voltage tolerance exists.
ES2B (YAGEO): Meets voltage and package requirements with 100 V, 2 A rating. Active status with ROHS3 compliance. Limited detailed specifications available; forward voltage is lower (0.95 V). Suitable for applications where detailed parameter verification is feasible.

Not Recommended for Direct Substitution:

S2A (Diotec Semiconductor): Voltage rating is 50 V, which does not meet the 100 V requirement of the original S2B-TP specification.
S2B-13-F (Diodes Incorporated): Current rating is 1.5 A, which does not meet the 2 A requirement of the original S2B-TP specification.

Frequently Asked Questions (FAQ)

Q: Can the S2B-TP be replaced with the S2A?

A: No. The S2A is rated for 50 V maximum reverse voltage, while the S2B-TP is rated for 100 V. Using a lower voltage-rated diode in a 100 V application creates risk of device failure and circuit malfunction.

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

A: Recovery speed refers to the reverse recovery time (trr), which is the time required for a diode to switch from forward conduction to reverse blocking. Standard recovery diodes have trr > 500 ns, while fast recovery diodes have trr ≤ 500 ns. Fast recovery diodes are suitable for higher frequency switching applications and reduce switching losses.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts are available in DO-214AA (SMB) surface mount package. However, packaging format (Cut Tape, Tape & Reel, or bulk) varies by manufacturer and part number. Verify packaging availability with your supplier for production requirements.

Q: Does lower forward voltage indicate a better diode?

A: Lower forward voltage reduces power dissipation and improves efficiency in rectification applications. However, substitution requires verification that the circuit design tolerates the different forward voltage characteristic, particularly in voltage regulation or precision rectification circuits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the original S2B-TP.

Q: What is MSL 1 rating?

A: Moisture Sensitivity Level (MSL) 1 indicates unlimited shelf life without moisture control requirements. All recommended substitute parts carry MSL 1 rating, matching the original part's storage and handling requirements.

Q: Can ES2B-E3/52T and ES2B-E3/5BT be used interchangeably?

A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format: ES2B-E3/52T is supplied in Cut Tape (CT), while ES2B-E3/5BT is supplied in Tape & Reel (TR). Selection depends on production equipment and volume requirements.

Q: Why is the S2B-13-F not recommended as a direct substitute?

A: The S2B-13-F is rated for 1.5 A average rectified current, while the S2B-TP is rated for 2 A. Using a lower current-rated diode in a 2 A application creates risk of thermal stress and device failure.

Q: What should I verify before implementing a substitute part?

A: Verify that the substitute part meets the mandatory parameters: 100 V reverse voltage rating, 2 A current rating, DO-214AA package, surface mount mounting type, and ROHS3 compliance. For applications sensitive to forward voltage or switching speed, confirm that the substitute part's characteristics are compatible with circuit design requirements.

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