CSFB201-G Equivalent & Substitute Parts Reference

Part Overview

The CSFB201-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 50 V DC reverse voltage and 2 A average rectified current in a Surface Mount DO-214AA (SMB) package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified when they meet the same electrical specifications and mechanical packaging requirements, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 2 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CSFB201-G is determined by the following criteria:

Primary Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 2 A minimum
Voltage - Forward (Vf) (Max) @ If: 920 mV or lower @ 2 A
Reverse Recovery Time (trr): ≤ 500 ns (Fast Recovery classification)

Mechanical Parameters:

Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must satisfy all primary electrical parameters at or above the CSFB201-G specifications. Parts meeting these criteria are classified as direct equivalents and may be used interchangeably in the same circuit application.

Parameter Comparison

Parameter	CSFB201-G (Comchip)	ES2A-13-F (Diodes Inc.)	ES2A-E3/52T (Vishay)	ES2A (YAGEO)	S2A (Diotec)
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 2 A	920 mV @ 2 A	900 mV @ 2 A	0.95 V	1.15 V @ 2 A
Reverse Recovery Time (trr)	35 ns	25 ns	30 ns	—	1.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	10 µA @ 50 V	—	5 µA @ 50 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA	DO-214AA, SMB
Operating Temperature - Junction	150°C (Max)	-55°C ~ 150°C	-55°C ~ 150°C	—	-50°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable

Engineering Selection Recommendations

ES2A-13-F (Diodes Incorporated) is the primary substitute for CSFB201-G. This part meets all electrical specifications with identical voltage and current ratings, forward voltage drop, and reverse leakage current. The reverse recovery time of 25 ns is superior to the main part specification. Both parts are RoHS3 compliant with MSL 1 rating and Active product status. The DO-214AA (SMB) package is mechanically identical.

ES2A-E3/52T (Vishay General Semiconductor - Diodes Division) is a secondary substitute. This part satisfies all primary electrical parameters with a forward voltage drop of 900 mV @ 2 A, which is lower than the CSFB201-G specification of 920 mV. Reverse recovery time of 30 ns meets fast recovery requirements. RoHS3 compliance and MSL 1 rating are confirmed. Operating temperature range extends to -55°C, providing broader thermal coverage than the main part.

ES2A (YAGEO) is a tertiary substitute with confirmed 50 V / 2 A ratings and 0.95 V forward voltage specification. RoHS3 compliance and MSL 1 rating are maintained. Detailed reverse recovery time data is not provided in the specification sheet.

S2A (Diotec Semiconductor) meets voltage and current specifications but exhibits a forward voltage drop of 1.15 V @ 2 A, which exceeds the CSFB201-G specification of 920 mV. Reverse recovery time of 1.5 µs indicates Standard Recovery classification, not Fast Recovery. This part is suitable only for applications where forward voltage drop and recovery speed are not critical design constraints. RoHS3 compliance is confirmed; MSL rating is Not Applicable.

All substitute parts maintain Active product status and are available in commercial quantities.

Frequently Asked Questions (FAQ)

Q: Can ES2A-13-F directly replace CSFB201-G in all applications?

A: Yes. ES2A-13-F meets or exceeds all electrical specifications of CSFB201-G, including voltage rating (50 V), current rating (2 A), forward voltage drop (920 mV @ 2 A), and reverse recovery time (25 ns). Both parts use identical DO-214AA (SMB) Surface Mount packaging and are RoHS3 compliant with MSL 1 rating.

Q: What is the difference between Fast Recovery and Standard Recovery diodes?

A: Fast Recovery diodes have reverse recovery time ≤ 500 ns and are suitable for high-frequency switching applications. Standard Recovery diodes have reverse recovery time > 500 ns and are used in lower-frequency rectification circuits. CSFB201-G is classified as Fast Recovery (35 ns). S2A is classified as Standard Recovery (1.5 µs) and should not be used in applications requiring fast switching performance.

Q: Why does S2A have a higher forward voltage drop than CSFB201-G?

A: Forward voltage drop is a material and design characteristic of the diode junction. S2A exhibits 1.15 V @ 2 A compared to CSFB201-G at 920 mV @ 2 A. This 230 mV difference results in higher power dissipation and heat generation in the same circuit. S2A is suitable only for applications where forward voltage drop is not a design constraint.

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

A: All substitute parts are available in DO-214AA (SMB) Surface Mount packaging, which is mechanically and electrically compatible with CSFB201-G. Tape & Reel (TR) packaging is confirmed for ES2A-13-F, ES2A-E3/52T, and ES2A. S2A packaging information is not specified in the data provided.

Q: What is MSL 1 (Unlimited) rating?

A: Moisture Sensitivity Level (MSL) 1 indicates the component has unlimited shelf life and does not require special moisture-control handling during storage or assembly. No baking or desiccant storage is required before soldering.

Q: Can I use ES2A-E3/52T in a circuit designed for CSFB201-G?

A: Yes. ES2A-E3/52T meets all primary electrical specifications with a lower forward voltage drop (900 mV vs. 920 mV) and faster reverse recovery time (30 ns vs. 35 ns). The extended operating temperature range (-55°C to 150°C) provides additional thermal margin compared to CSFB201-G (150°C maximum). Both parts are RoHS3 compliant and use identical DO-214AA (SMB) packaging.

Q: Which substitute part should I select for cost optimization?

A: ES2A (YAGEO) offers the highest inventory availability (26,200 pcs) among substitute parts and is suitable for applications where detailed reverse recovery time specification is not critical. For applications requiring confirmed Fast Recovery performance, ES2A-13-F or ES2A-E3/52T are recommended.

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