CSFC302-G Equivalent & Substitute Parts Reference

Part Overview

The CSFC302-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100 V DC reverse voltage and 3 A average rectified current in a Surface Mount DO-214AB (SMC) package. This component is classified as Active product status and is RoHS3 compliant with ROHS3 certification. The part is supplied in Tape & Reel (TR) packaging with 800 pieces currently in stock.

Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the DO-214AB (SMC) package form factor. Substitution becomes necessary when the primary part reaches end-of-life status, inventory constraints occur, or alternative sourcing is required for supply chain optimization.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Mounting Type	Surface Mount	-
Package / Case	DO-214AB, SMC	-
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the CSFC302-G are grouped based on strict electrical and mechanical compatibility criteria. All substitute parts must meet the following mandatory parameters:

Core Compatibility Parameters:

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

Secondary Electrical Parameters (Allowable Variation):

Voltage - Forward (Vf) (Max) @ If: Range 900 mV to 1.3 V
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
Reverse Recovery Time (trr): 25 ns to 150 ns
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 100 V

Substitution is valid when all core compatibility parameters match exactly and secondary electrical parameters fall within the specified allowable ranges. Parts with different package types, voltage ratings, or current ratings are excluded from substitution consideration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Product Status
CSFC302-G	Comchip Technology	100	3	950 @ 3 A	Fast Recovery ≤ 500ns	35	5 @ 100 V	DO-214AB, SMC	Active
ES3B	Taiwan Semiconductor Corporation	100	3	950 @ 3 A	Fast Recovery ≤ 500ns	35	10 @ 100 V	DO-214AB, SMC	Active
ES3B-13-F	Diodes Incorporated	100	3	900 @ 3 A	Fast Recovery ≤ 500ns	25	10 @ 100 V	DO-214AB, SMC	Active
RS3B-13-F	Diodes Incorporated	100	3	1300 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 100 V	DO-214AB, SMC	Active
RS3B-E3/57T	Vishay General Semiconductor - Diodes Division	100	3	1300 @ 2.5 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	DO-214AB, SMC	Active
S3B	Diotec Semiconductor	100	3	1150 @ 3 A	Standard Recovery > 500ns	1500	5 @ 100 V	DO-214AB, SMC	Active
S3B-13-F	Diodes Incorporated	100	3	1150 @ 3 A	Standard Recovery > 500ns	Not Specified	10 @ 100 V	DO-214AB, SMC	Active
S3B-TP	Micro Commercial Co	100	3	1200 @ 3 A	Standard Recovery > 500ns	Not Specified	10 @ 100 V	DO-214AB, SMC	Not For New Designs
S3BHE3_A/H	Vishay General Semiconductor - Diodes Division	100	3	1150 @ 2.5 A	Standard Recovery > 500ns	2500	10 @ 100 V	DO-214AB, SMC	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Recommended for New Designs):

ES3B-13-F (Diodes Incorporated) is the preferred substitute when the CSFC302-G is unavailable. This part maintains 100 V reverse voltage and 3 A current ratings with improved forward voltage characteristics (900 mV @ 3 A) and faster reverse recovery time (25 ns). It is supplied in Tape & Reel packaging with 10,100 pieces in stock and carries Active product status with full RoHS3 compliance.

ES3B (Taiwan Semiconductor Corporation) provides electrical equivalence to the CSFC302-G with matching 950 mV forward voltage and 35 ns reverse recovery time. This part is available with 10,400 pieces in stock and maintains Active product status with RoHS3 compliance.

Secondary Substitutes (Active Status, Application-Dependent):

RS3B-13-F (Diodes Incorporated) and RS3B-E3/57T (Vishay General Semiconductor - Diodes Division) are suitable substitutes for applications where higher forward voltage (1.3 V @ 3 A) and longer reverse recovery time (150 ns) are acceptable. These parts maintain the 100 V / 3 A rating and DO-214AB package compatibility. Both carry Active product status and RoHS3 compliance.

S3B-13-F (Diodes Incorporated) and S3B (Diotec Semiconductor) are suitable for applications tolerating standard recovery characteristics (> 500ns). These parts feature forward voltage of 1.15 V @ 3 A and are available in Active product status with RoHS3 compliance. S3B-13-F offers 30,100 pieces in stock.

Not Recommended for New Designs:

S3B-TP (Micro Commercial Co) carries "Not For New Designs" product status and should not be selected for new circuit designs, despite electrical compatibility with the CSFC302-G.

Frequently Asked Questions (FAQ)

Q: What are the critical parameters that determine if a part can substitute for the CSFC302-G?

A: The mandatory parameters are: 100 V DC reverse voltage rating, 3 A average rectified current, DO-214AB (SMC) package form factor, Surface Mount mounting type, RoHS3 compliance, and MSL 1 moisture sensitivity level. All substitute parts must match these specifications exactly.

Q: Can I use a substitute part with different forward voltage characteristics?

A: Yes, within limits. The CSFC302-G specifies 950 mV maximum forward voltage @ 3 A. Substitute parts with forward voltage ranging from 900 mV to 1.3 V @ 3 A are electrically compatible. However, higher forward voltage increases power dissipation and heat generation. Verify thermal design margins in your application before selecting a substitute with elevated forward voltage.

Q: What is the difference between Fast Recovery and Standard Recovery diodes in this product category?

A: The CSFC302-G is classified as Fast Recovery with reverse recovery time (trr) of 35 ns. Substitute parts with Standard Recovery classification (trr > 500ns, such as S3B and S3B-13-F) have significantly longer recovery times. Fast Recovery diodes are preferred for high-frequency switching applications. Standard Recovery diodes are suitable for lower-frequency rectification circuits. Verify circuit operating frequency before substituting between these classifications.

Q: Are all substitute parts available in the same packaging options as the CSFC302-G?

A: No. The CSFC302-G is supplied in Tape & Reel (TR) packaging. Substitute parts are available in multiple packaging formats: ES3B-13-F and S3B-13-F are supplied in Cut Tape (CT) & Digi-Reel®; RS3B-E3/57T is supplied in Cut Tape (CT); S3B-TP is supplied in Tape & Reel (TR); ES3B and S3B have unspecified packaging. Verify packaging compatibility with your assembly process before final part selection.

Q: Can I use S3BHE3_A/H as a substitute for the CSFC302-G?

A: S3BHE3_A/H is electrically compatible with the CSFC302-G in terms of voltage and current ratings. However, this part is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. It features Standard Recovery characteristics (2.5 µs trr) rather than Fast Recovery. Use this part only if your application requires automotive qualification or if Standard Recovery performance is acceptable.

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

A: Parts marked "Not For New Designs" are in mature or declining production phases. While S3B-TP remains electrically compatible with the CSFC302-G, it should not be selected for new circuit designs. Use this part only for legacy system maintenance or repair applications where the original part specification must be maintained.

Q: How do I verify that a substitute part will work in my existing circuit?

A: Compare the substitute part's electrical parameters against your circuit design requirements: (1) Confirm reverse voltage rating meets or exceeds your maximum reverse bias condition; (2) Verify average rectified current rating exceeds your maximum forward current; (3) Check forward voltage drop at your operating current to ensure thermal design margins; (4) Confirm reverse recovery time is compatible with your circuit switching frequency; (5) Verify package form factor and pin configuration match your PCB layout. All substitute parts listed maintain DO-214AB package compatibility with the CSFC302-G.

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