CEFA203-G Equivalent & Substitute Parts Reference

Part Overview

The CEFA203-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production support. The diode features fast recovery characteristics with a reverse recovery time of 25 ns and forward voltage of 920 mV at 2 A, making it suitable for standard rectification applications requiring moderate current handling and voltage blocking capability.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	25	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	150	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the CEFA203-G are classified into two functional groups based on electrical parameter compatibility:

Group 1: Direct Electrical Equivalents (2 A Rating) Parts meeting all primary electrical specifications: 200 V reverse voltage, 2 A average rectified current, fast recovery characteristics (≤ 500 ns), and DO-214AC/SMA package compatibility. These parts are interchangeable in applications where the original 2 A current rating is required.

Qualifying parts: ES2DA-13-F, MURA220T3G, BYG22D-E3/TR3, SA2D-E3/61T, STTH2R02A

Group 2: Reduced Current Substitutes (1 A to 1.5 A Rating) Parts with identical 200 V reverse voltage and fast recovery characteristics but reduced average rectified current ratings (1 A or 1.5 A). These parts are suitable only for applications where circuit current requirements do not exceed the substitute part's rating.

Qualifying parts: CMR1F-02M TR13 PBFREE, RGF1D, STTH102A, STTH102AY, STTH1R02A

Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed application requirement
Speed: Fast Recovery ≤ 500 ns preferred for equivalent performance
Package / Case: DO-214AC or SMA compatible
Mounting Type: Surface Mount
Product Status: Active or Not For New Designs acceptable; Obsolete not acceptable for new designs

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (mV)	trr (ns)	Ir @ Vr (µA)	Speed	Product Status	RoHS
CEFA203-G	Comchip Technology	200	2	920 @ 2A	25	5 @ 200V	Fast Recovery ≤ 500ns	Obsolete	—
ES2DA-13-F	Diodes Incorporated	200	2	920 @ 2A	25	5 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
BYG22D-E3/TR3	Vishay General Semiconductor	200	2	1100 @ 2A	25	1 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
CMR1F-02M TR13 PBFREE	Central Semiconductor Corp	200	1	1300 @ 1A	150	5 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
MURA220T3G	onsemi	200	2	950 @ 2A	35	2 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
RGF1D	onsemi	200	1	1300 @ 1A	150	5 @ 200V	Fast Recovery ≤ 500ns	Not For New Designs	ROHS3
SA2D-E3/61T	Vishay General Semiconductor	200	2	1100 @ 2A	1500	3 @ 200V	Standard Recovery >500ns	Active	ROHS3
STTH102A	STMicroelectronics	200	1	970 @ 1A	20	1 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
STTH102AY	STMicroelectronics	200	1	970 @ 1A	20	1 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
STTH1R02A	STMicroelectronics	200	1.5	1000 @ 1.5A	30	3 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3
STTH2R02A	STMicroelectronics	200	2	1000 @ 2A	30	3 @ 200V	Fast Recovery ≤ 500ns	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (2 A Applications):

ES2DA-13-F (Diodes Incorporated) provides the closest electrical match to CEFA203-G with identical voltage, current, forward voltage, and recovery time specifications. Product status is Active with ROHS3 compliance, supporting long-term supply continuity for production environments.

STTH2R02A (STMicroelectronics) offers equivalent 2 A performance with marginally higher forward voltage (1000 mV vs. 920 mV) and slightly longer recovery time (30 ns vs. 25 ns). Active product status and ROHS3 compliance ensure design support and regulatory compliance.

MURA220T3G (onsemi) meets 2 A requirements with forward voltage of 950 mV and recovery time of 35 ns. Extensive inventory availability (245,400 pcs) supports high-volume production. Active product status and ROHS3 compliance confirmed.

BYG22D-E3/TR3 (Vishay General Semiconductor) is classified as Avalanche technology with 200 V, 2 A rating. Forward voltage is 1100 mV at 2 A with 25 ns recovery time. Active product status and ROHS3 compliance support new design implementation.

SA2D-E3/61T (Vishay General Semiconductor) provides 200 V, 2 A performance but features Standard Recovery characteristics (1500 ns trr) rather than Fast Recovery. This part is suitable only for applications where recovery speed is not a critical parameter. Active product status and ROHS3 compliance confirmed.

For Reduced Current Applications (1 A to 1.5 A):

STTH102A and STTH102AY (STMicroelectronics) are rated for 1 A with fast recovery (20 ns trr) and forward voltage of 970 mV at 1 A. STTH102AY includes automotive-grade qualification. Both parts are Active with ROHS3 compliance.

STTH1R02A (STMicroelectronics) provides intermediate 1.5 A rating with 1000 mV forward voltage and 30 ns recovery time, suitable for applications requiring current between 1 A and 2 A. Active product status and ROHS3 compliance confirmed.

CMR1F-02M TR13 PBFREE (Central Semiconductor Corp) and RGF1D (onsemi) both provide 1 A performance with 200 V rating. CMR1F-02M is Active; RGF1D is classified as Not For New Designs. Both feature ROHS3 compliance.

Compliance Summary:

All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of CEFA203-G. All parts are classified as EAR99 for export control purposes and share identical HTSUS commodity code (8541.10.0080).

Frequently Asked Questions (FAQ)

Q: Can STTH2R02A directly replace CEFA203-G in all applications?

A: STTH2R02A meets the primary electrical specifications of 200 V reverse voltage and 2 A average rectified current. Forward voltage is 1000 mV at 2 A compared to 920 mV for CEFA203-G, and recovery time is 30 ns versus 25 ns. These differences are within typical design tolerances for general-purpose rectification. Verification of circuit performance under actual operating conditions is necessary to confirm suitability for specific applications.

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

A: Fast Recovery diodes have reverse recovery time (trr) of 500 ns or less, while Standard Recovery diodes exceed 500 ns. CEFA203-G specifies Fast Recovery with 25 ns trr. SA2D-E3/61T features Standard Recovery with 1500 ns trr. Fast Recovery diodes are preferred in switching applications and high-frequency circuits where reduced switching losses are required. Standard Recovery diodes are suitable for lower-frequency rectification where recovery speed is not critical.

Q: Can I use a 1 A rated diode (STTH102A) in place of the 2 A rated CEFA203-G?

A: Substitution is possible only if the circuit's maximum current requirement does not exceed 1 A. The diode must be rated for the actual current it will conduct. Using an undersized diode in a 2 A application will result in excessive junction temperature, reduced reliability, and potential device failure. Current rating must equal or exceed the application requirement.

Q: Are all substitute parts available in the same DO-214AC package?

A: All substitute parts listed are available in DO-214AC (SMA) surface mount package, ensuring mechanical and thermal compatibility with CEFA203-G. Supplier device package designations may vary (SMA, DO-214AC, or DO-214AC (SMA)), but these refer to the same physical package.

Q: What does "Not For New Designs" product status mean?

A: Parts classified as "Not For New Designs" (such as RGF1D) are still in production and available for purchase but are not recommended for incorporation into new circuit designs. These parts are typically maintained for legacy product support and repair applications. For new designs, Active status parts are preferred to ensure long-term supply availability and manufacturer support.

Q: How do I verify that a substitute part is compatible with my circuit?

A: Confirm that the substitute part meets or exceeds the following parameters from your original design: (1) Voltage - DC Reverse rating must equal or exceed the circuit's reverse voltage requirement; (2) Current - Average Rectified rating must equal or exceed the circuit's maximum forward current; (3) Package and mounting type must match PCB layout; (4) Operating temperature range must encompass the application environment. Forward voltage and recovery time differences should be evaluated against circuit performance specifications.

Q: Why does ES2DA-13-F have lower inventory than MURA220T3G?

A: Inventory levels reflect current distributor stock and do not indicate product availability or long-term supply status. Both ES2DA-13-F and MURA220T3G are Active products from established manufacturers. Inventory quantities should not be the primary selection criterion; instead, prioritize product status, compliance certifications, and electrical parameter match.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed carry ROHS3 Compliant status, confirming compliance with Restriction of Hazardous Substances Directive requirements. CEFA203-G does not specify RoHS status in the provided data. All parts are REACH Unaffected, indicating they do not contain substances of very high concern listed under REACH regulations.

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