CSFC301-G Equivalent & Substitute Parts Reference

Part Overview

The CSFC301-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 50 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 unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the original CSFC301-G becomes unavailable from inventory, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from multiple qualified manufacturers offering equivalent electrical and mechanical specifications.

Substiute Parts

CSFC301-G

Comchip TechnologyIn Stock: 1193CSFC301-G Datasheet

Current PartRFQ

ES3A

Taiwan Semiconductor CorporationIn Stock: 17208ES3A Datasheet

MFR RecommendedRFQ

ES3A-13-F

Diodes IncorporatedIn Stock: 10319ES3A-13-F Datasheet

MFR RecommendedRFQ

ES3A-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 5356ES3A-E3/57T Datasheet

MFR RecommendedRFQ

RS3A-13-F

Diodes IncorporatedIn Stock: 5607RS3A-13-F Datasheet

MFR RecommendedRFQ

S10A-TP

Micro Commercial CoIn Stock: 2252S10A-TP Datasheet

MFR RecommendedRFQ

S3A

Diodes IncorporatedIn Stock: 922S3A Datasheet

MFR RecommendedRFQ

S3A-13-F

Diodes IncorporatedIn Stock: 15250S3A-13-F Datasheet

MFR RecommendedRFQ

SMLJ60S05-TP

Micro Commercial CoIn Stock: 12885SMLJ60S05-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSFC301-G is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 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 Performance Parameters (must not exceed specified limits):

• Voltage - Forward (Vf) (Max) @ If: ≤ 950 mV @ 3 A
• Reverse Recovery Time (trr): ≤ 35 ns (Fast Recovery classification)
• Current - Reverse Leakage @ Vr: ≤ 5 µA @ 50 V

Substitute parts are grouped into two categories based on performance characteristics:

Category A - Direct Equivalents (Fast Recovery, Tighter Specifications): Parts meeting or exceeding the CSFC301-G performance envelope with Fast Recovery speed classification and reverse recovery time ≤ 35 ns.

Category B - Functional Equivalents (Standard Recovery, Relaxed Specifications): Parts with 50 V / 3 A ratings in DO-214AB SMC package but with Standard Recovery speed classification (>500ns) or higher reverse leakage current. These parts are electrically compatible but exhibit different transient response characteristics.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, Fast Recovery):

ES3A-13-F and ES3A-E3/57T are the preferred substitute options. Both parts maintain Active product status, meet or exceed the CSFC301-G electrical specifications, and are available in standard packaging formats. ES3A-13-F offers the lowest reverse recovery time (25 ns) and is supplied in Cut Tape & Digi-Reel® format. ES3A-E3/57T is supplied in Tape & Reel format and provides 30 ns reverse recovery time. Both are RoHS3 compliant with MSL 1 rating.

ES3A (base part number without packaging designation) is also an Active substitute with equivalent Fast Recovery performance, though packaging information is not specified in the provided data.

Secondary Substitutes (Active Status, Performance Trade-offs):

RS3A-13-F maintains Active status and Fast Recovery classification but exhibits higher forward voltage drop (1.3 V @ 3 A versus 950 mV) and significantly longer reverse recovery time (150 ns). This part is suitable only when circuit design permits higher forward voltage dissipation and slower switching transients.

Not Recommended for New Designs:

S3A-13-F and S3A are classified as Standard Recovery devices with reverse recovery time of 2 µs, representing a 57× increase in switching delay compared to CSFC301-G. Although S3A-13-F maintains Active status, the Standard Recovery classification indicates fundamentally different transient response characteristics unsuitable for applications requiring fast switching performance.

SMLJ60S05-TP is marked "Not For New Designs" and carries a 6 A current rating, exceeding the 3 A specification of CSFC301-G. This part is not recommended for direct substitution.

S3A is Obsolete and should not be selected for new applications.

Frequently Asked Questions (FAQ)

Q1: Can ES3A-13-F directly replace CSFC301-G in all applications?

ES3A-13-F is electrically compatible with CSFC301-G across all critical parameters: 50 V reverse voltage, 3 A average rectified current, DO-214AB SMC package, and Fast Recovery speed classification. The forward voltage drop is lower (900 mV versus 950 mV), and reverse recovery time is faster (25 ns versus 35 ns), making it a superior substitute. Mechanical compatibility is confirmed through identical package designation.

Q2: What is the difference between Fast Recovery and Standard Recovery classifications?

Fast Recovery diodes exhibit reverse recovery time ≤ 500 ns and are designed for high-frequency switching applications. Standard Recovery diodes have reverse recovery time > 500 ns and are suitable for lower-frequency rectification. CSFC301-G is Fast Recovery (35 ns). Substitutes S3A-13-F and S3A are Standard Recovery (2000 ns / 2 µs), representing a 57× increase in switching delay. Standard Recovery substitutes are not interchangeable in circuits requiring fast transient response.

Q3: Why does RS3A-13-F have a higher forward voltage drop (1.3 V) compared to CSFC301-G (950 mV)?

Forward voltage drop is a material and design characteristic of the diode junction. RS3A-13-F exhibits 1.3 V @ 3 A, which is 350 mV higher than CSFC301-G. This results in increased power dissipation (P = Vf × I = 1.3 V × 3 A = 3.9 W versus 2.85 W for CSFC301-G). RS3A-13-F is suitable only when circuit thermal design accommodates this additional dissipation.

Q4: Can SMLJ60S05-TP substitute for CSFC301-G?

SMLJ60S05-TP is rated for 6 A average rectified current, exceeding the 3 A specification of CSFC301-G. While the 50 V reverse voltage and DO-214AB SMC package are identical, the higher current rating and "Not For New Designs" status make this part unsuitable for direct substitution. Additionally, SMLJ60S05-TP is Standard Recovery (>500 ns), not Fast Recovery.

Q5: What does "Product Status: Obsolete" mean for S3A?

Obsolete status indicates the part is no longer manufactured and is not recommended for new designs. S3A should not be selected for applications under development. Existing inventory may be available but represents a declining supply with no manufacturer support or future availability guarantees.

Q6: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (ES3A, ES3A-13-F, ES3A-E3/57T, RS3A-13-F, S3A-13-F, S3A, and SMLJ60S05-TP) are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of CSFC301-G.

Q7: What packaging options are available for substitutes?

ES3A-13-F is supplied in Cut Tape (CT) & Digi-Reel® format. ES3A-E3/57T and S3A-13-F are supplied in Tape & Reel (TR) format. ES3A packaging is not specified. CSFC301-G is supplied in Tape & Reel (TR). Packaging selection depends on assembly equipment compatibility and volume requirements.

Q8: Which substitute offers the best performance match to CSFC301-G?

ES3A-13-F provides the closest performance match: identical 50 V / 3 A ratings, Fast Recovery classification, lower forward voltage (900 mV versus 950 mV), and faster reverse recovery time (25 ns versus 35 ns). It is Active status, RoHS3 compliant, and available in standard packaging.