CURC302-G Equivalent & Substitute Parts Reference

Part Overview

The CURC302-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 unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter ranges. The CURC302-G serves as a reference baseline for identifying functionally interchangeable rectifier diodes suitable for direct replacement in surface mount applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	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 CURC302-G are grouped based on strict electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

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

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Acceptable range 900 mV to 1.3 V @ 2.5–3 A
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns)
Reverse Recovery Time (trr): Acceptable range 25 ns to 150 ns
Current - Reverse Leakage @ Vr: Acceptable range 5 µA to 10 µA @ 100 V
Operating Temperature - Junction: Minimum -55°C to maximum 150°C

Substitute parts meeting all primary criteria and falling within secondary parameter ranges are electrically and mechanically compatible with the CURC302-G for direct replacement applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Tj (Max) [°C]	Package	RoHS	MSL
CURC302-G	Comchip Technology	100	3	1.0 @ 3 A	Fast Recovery ≤ 500ns	50	5 @ 100 V	150	DO-214AB, SMC	ROHS3	1
ES3B	Taiwan Semiconductor Corporation	100	3	0.95 @ 3 A	Fast Recovery ≤ 500ns	35	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
ES3B-13-F	Diodes Incorporated	100	3	0.9 @ 3 A	Fast Recovery ≤ 500ns	25	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
ES3B-E3/9AT	Vishay General Semiconductor - Diodes Division	100	3	0.9 @ 3 A	Fast Recovery ≤ 500ns	30	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
RS3B-13-F	Diodes Incorporated	100	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 100 V	150	DO-214AB, SMC	ROHS3	1
RS3B-E3/57T	Vishay General Semiconductor - Diodes Division	100	3	1.3 @ 2.5 A	Fast Recovery ≤ 500ns	150	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
S3B	Diotec Semiconductor	100	3	1.15 @ 3 A	Standard Recovery > 500ns	1500	5 @ 100 V	150	DO-214AB, SMC	ROHS3	Not Applicable
S3B-13-F	Diodes Incorporated	100	3	1.15 @ 3 A	Standard Recovery > 500ns	—	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
S3B-TP	Micro Commercial Co	100	3	1.2 @ 3 A	Standard Recovery > 500ns	—	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1
S3BHE3_A/H	Vishay General Semiconductor - Diodes Division	100	3	1.15 @ 2.5 A	Standard Recovery > 500ns	2500	10 @ 100 V	150	DO-214AB, SMC	ROHS3	1

Engineering Selection Recommendations

Fast Recovery Substitutes (Preferred for High-Frequency Applications):

ES3B-13-F (Diodes Incorporated) and ES3B-E3/9AT (Vishay General Semiconductor - Diodes Division) provide the lowest reverse recovery time (25 ns and 30 ns respectively) among fast recovery options. Both maintain 100 V / 3 A ratings, DO-214AB SMC packaging, ROHS3 compliance, and MSL 1 classification. ES3B-13-F offers superior switching performance with 25 ns trr. Both are Active product status.

ES3B (Taiwan Semiconductor Corporation) delivers 35 ns reverse recovery time with 0.95 V forward voltage drop, maintaining all primary compatibility criteria and Active product status.

RS3B-13-F and RS3B-E3/57T (both Diodes Incorporated and Vishay respectively) provide fast recovery classification with extended reverse recovery time (150 ns). These parts are suitable where switching speed requirements are less stringent. Both maintain 100 V / 3 A ratings and ROHS3 compliance. RS3B-13-F is Active product status; RS3B-E3/57T is Active product status.

Standard Recovery Substitutes (General-Purpose Applications):

S3B-13-F (Diodes Incorporated) and S3BHE3_A/H (Vishay General Semiconductor - Diodes Division) operate with standard recovery characteristics (> 500ns). S3B-13-F is Active product status with 30,100 pcs inventory. S3BHE3_A/H carries AEC-Q101 automotive qualification and Active product status with 1,351 pcs inventory.

S3B (Diotec Semiconductor) and S3B-TP (Micro Commercial Co) provide standard recovery operation. S3B is Active product status; S3B-TP is Not For New Designs product status. S3B-TP should not be selected for new circuit designs.

Product Status Consideration:

All substitute parts except S3B-TP maintain Active product status, indicating ongoing manufacturer support and availability. S3B-TP is classified as Not For New Designs and should be avoided in new applications.

Compliance and Handling:

All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, matching the CURC302-G requirements. S3B carries MSL Not Applicable classification, which does not affect compatibility but indicates different handling protocols.

Frequently Asked Questions (FAQ)

Q: Can ES3B-13-F directly replace CURC302-G in existing designs?

A: Yes. ES3B-13-F maintains identical 100 V / 3 A electrical ratings, DO-214AB SMC package, surface mount configuration, ROHS3 compliance, and MSL 1 classification. The 25 ns reverse recovery time is superior to the CURC302-G's 50 ns, and the 0.9 V forward voltage drop is lower than the 1.0 V specification. Direct substitution is electrically and mechanically compatible.

Q: What is the difference between fast recovery and standard recovery diodes in this product line?

A: Fast recovery diodes (ES3B series, RS3B series) exhibit reverse recovery times ≤ 500 ns, enabling operation at higher switching frequencies with reduced switching losses. Standard recovery diodes (S3B series) exhibit reverse recovery times > 500 ns, suitable for lower-frequency rectification applications. Both classifications maintain 100 V / 3 A ratings and DO-214AB SMC packaging. Selection depends on circuit switching frequency requirements.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: No. Packaging formats vary among substitutes. ES3B-13-F, ES3B-E3/9AT, RS3B-13-F, S3B-TP, and S3BHE3_A/H are available in Tape & Reel (TR) format. RS3B-E3/57T is available in Cut Tape (CT) format. S3B-13-F is available in Cut Tape (CT) & Digi-Reel® format. ES3B and S3B do not specify packaging format in provided data. Verify packaging compatibility with assembly equipment before selection.

Q: Which substitute offers the lowest forward voltage drop?

A: ES3B-13-F provides the lowest forward voltage drop at 0.9 V @ 3 A, compared to the CURC302-G's 1.0 V @ 3 A. This results in reduced power dissipation and heat generation in rectification circuits. ES3B (0.95 V @ 3 A) and ES3B-E3/9AT (0.9 V @ 3 A) also offer lower forward voltage drops than the reference part.

Q: Can S3B-TP be used in new product designs?

A: No. S3B-TP is classified as Not For New Designs product status. This designation indicates the manufacturer is discontinuing support for new applications. Use S3B-13-F or other Active-status alternatives for new circuit designs.

Q: What is the significance of AEC-Q101 qualification on S3BHE3_A/H?

A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards established by the Automotive Electronics Council. S3BHE3_A/H is suitable for automotive applications requiring enhanced quality assurance and temperature cycling validation. Non-automotive applications do not require this qualification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant status, matching the CURC302-G compliance requirement. This ensures lead-free construction and compliance with European Union Restriction of Hazardous Substances regulations.

Q: What is MSL 1 (Unlimited) moisture sensitivity classification?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and does not require special moisture-control storage conditions. The part can be stored at standard ambient conditions without desiccant packaging or controlled humidity environments. All substitute parts except S3B maintain MSL 1 classification.

Q: Which substitute offers the fastest switching performance?

A: ES3B-13-F provides the fastest switching performance with 25 ns reverse recovery time, compared to the CURC302-G's 50 ns. This enables operation at higher switching frequencies with minimal switching losses. ES3B-E3/9AT (30 ns) and ES3B (35 ns) also provide superior switching performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message