CEFC303-G Equivalent & Substitute Parts Reference

Part Overview

The CEFC303-G is a superfast recovery rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage with 3 A average rectified current in a surface mount DO-214AB (SMC) package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure supply chain availability for applications requiring 200 V / 3 A rectification with fast recovery characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 3 A	mV
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction (Max)	150	°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CEFC303-G is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 200 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: Must not exceed application requirements
Reverse Recovery Time (trr): Determines switching speed classification
Current - Reverse Leakage @ Vr: Leakage characteristics at rated voltage
Operating Temperature - Junction: Must support application thermal environment

Substitute parts are grouped into two categories based on recovery speed characteristics:

Fast Recovery Diodes (trr ≤ 50 ns): ES3D-13-F, ER3D-TP, ER3D-TP-HF, MURS320-13-F

Standard Recovery Diodes (trr > 500 ns): S3D, S3D-13-F, S3D-E3/57T, RS3D-13-F, RS3D-E3/57T, RS3D-E3/9AT

All substitute parts maintain the 200 V / 3 A electrical rating and DO-214AB (SMC) package specification required for direct replacement.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [mV]	trr [ns]	Ir @ Vr [µA]	Package	Product Status	RoHS Status
CEFC303-G	Comchip Technology	200	3	900 @ 3A	50	10 @ 200V	DO-214AB (SMC)	Obsolete	—
ES3D-13-F	Diodes Incorporated	200	3	900 @ 3A	25	10 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
ER3D-TP	Micro Commercial Co	200	3	950 @ 3A	35	5 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
ER3D-TP-HF	Micro Commercial Co	200	3	950 @ 3A	35	5 @ 200V	DO-214AB (SMC)	Active	—
MURS320-13-F	Diodes Incorporated	200	3	875 @ 3A	25	5 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
RS3D-13-F	Diodes Incorporated	200	3	1300 @ 3A	150	5 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
RS3D-E3/57T	Vishay General Semiconductor - Diodes Division	200	3	1300 @ 2.5A	150	10 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
RS3D-E3/9AT	Vishay General Semiconductor - Diodes Division	200	3	1300 @ 2.5A	150	10 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
S3D	Diodes Incorporated	200	3	1150 @ 3A	2000	10 @ 200V	DO-214AB (SMC)	Obsolete	ROHS3 Compliant
S3D-13-F	Diodes Incorporated	200	3	1150 @ 3A	—	10 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant
S3D-E3/57T	Vishay General Semiconductor - Diodes Division	200	3	1150 @ 2.5A	2500	10 @ 200V	DO-214AB (SMC)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Equivalent Performance:

ES3D-13-F (Diodes Incorporated) provides the closest electrical match to CEFC303-G with active product status and ROHS3 compliance. This part maintains 200 V / 3 A ratings, achieves superior reverse recovery time (25 ns vs. 50 ns), and is available in high inventory quantities (45,182 pcs).

For Applications Requiring Fast Recovery Characteristics:

ER3D-TP and MURS320-13-F are suitable alternatives when fast recovery performance is critical. Both maintain the 200 V / 3 A specification with reverse recovery times of 35 ns and 25 ns respectively. MURS320-13-F offers the lowest forward voltage drop (875 mV @ 3A) among fast recovery options.

For Standard Recovery Applications:

S3D-13-F (Diodes Incorporated) and S3D-E3/57T (Vishay) are appropriate when standard recovery speed (>500 ns) is acceptable. S3D-13-F is active status with extensive inventory availability (295,099 pcs). Both maintain 200 V / 3 A electrical ratings and ROHS3 compliance.

Compliance Considerations:

All recommended active-status substitute parts carry ROHS3 compliance certification. The CEFC303-G and S3D are obsolete; active alternatives should be prioritized for new designs. All parts are classified as REACH Unaffected and carry EAR99 ECCN designation.

Packaging and Moisture Sensitivity:

All substitute parts are available in DO-214AB (SMC) surface mount package with MSL 1 (Unlimited) rating, ensuring compatibility with existing PCB assembly processes and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can ES3D-13-F directly replace CEFC303-G in existing designs?

A: Yes. ES3D-13-F maintains identical 200 V / 3 A electrical ratings and DO-214AB (SMC) package specification. The 25 ns reverse recovery time is superior to the original 50 ns specification, making it suitable for direct substitution. Verify application thermal requirements do not exceed the -55°C to 150°C operating range.

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

A: Fast recovery diodes (ES3D-13-F, ER3D-TP, MURS320-13-F) exhibit reverse recovery times ≤ 50 ns, suitable for high-frequency switching applications. Standard recovery diodes (S3D-13-F, RS3D-13-F, S3D-E3/57T) have reverse recovery times > 500 ns, appropriate for lower-frequency rectification. Selection depends on application switching frequency requirements.

Q: Are all substitute parts RoHS compliant?

A: All active-status substitute parts listed carry ROHS3 compliance certification. The obsolete parts (CEFC303-G, S3D) do not have RoHS certification data provided. For new designs, select from active-status parts to ensure regulatory compliance.

Q: What is the significance of forward voltage (Vf) differences among substitutes?

A: Forward voltage variations (875 mV to 1300 mV @ rated current) affect power dissipation and thermal performance. Lower Vf values (MURS320-13-F at 875 mV) reduce heat generation. Higher Vf values (RS3D series at 1300 mV) increase power loss. Select based on thermal budget and efficiency requirements of the application.

Q: Can I use RS3D-E3/57T or RS3D-E3/9AT as replacements for CEFC303-G?

A: Electrical substitution is possible (200 V / 3 A / DO-214AB package), but these parts exhibit significantly higher forward voltage (1300 mV vs. 900 mV) and slower recovery time (150 ns vs. 50 ns). Use only if application circuit design accommodates increased power dissipation and slower switching characteristics.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in DO-214AB (SMC) surface mount package. Packaging formats vary: Cut Tape (CT), Tape & Reel (TR), or bulk. Verify packaging format compatibility with assembly equipment and procurement requirements before selection.

Q: Why is CEFC303-G marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active-status alternatives (ES3D-13-F, S3D-13-F, ER3D-TP) are recommended for new designs to ensure long-term supply availability and continued manufacturer support.

Q: Are there temperature range differences among substitutes?

A: Yes. Operating temperature ranges vary: CEFC303-G and most Diodes Incorporated parts operate to 150°C maximum; Micro Commercial Co (ER3D series) and Vishay parts extend to 175°C. Verify application maximum junction temperature requirements when selecting among alternatives.

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