ER302-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The ER302-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design and procurement requirements. The ER302-TP operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics with a reverse recovery time of 35 nanoseconds. Equivalent and substitute parts are selected based on matching or exceeding the electrical performance parameters while maintaining mechanical compatibility with the DO-201AD package format.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) Maximum @ If	950 mV @ 3 A	mV @ A
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ER302-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Parametric Match): Parts that match all critical electrical parameters—reverse voltage (200 V), average rectified current (3 A), forward voltage drop (950 mV @ 3 A), reverse recovery time (35 ns), and reverse leakage current (5 µA @ 200 V)—while maintaining the DO-201AD through-hole package format. These parts are interchangeable in applications where the original ER302-TP specifications are required.

Similar Substitutes (Parametric Upgrade): Parts that exceed the current rating or temperature range of the original part while maintaining the same reverse voltage and package type. These substitutes are suitable for applications requiring enhanced performance margins or extended operating temperature ranges.

The substitution logic is based strictly on the following parameters:

Voltage - DC Reverse (Vr) Maximum: Must equal or exceed 200 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Package / Case: Must be DO-201AD, Axial
Mounting Type: Must be Through Hole
Technology: Standard rectifier diode technology
RoHS Compliance: ROHS3 Compliant status preferred

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ A]	trr [ns]	Ir @ Vr [µA @ V]	Package	Temp Range [°C]	RoHS
ER302-TP	Micro Commercial Co	Obsolete	200	3	950 @ 3	35	5 @ 200	DO-201AD	-55 to 150	ROHS3
SF34G-TP	Micro Commercial Co	Active	200	3	950 @ 3	35	5 @ 200	DO-201AD	-65 to 150	ROHS3
ER302_R2_00001	Panjit International Inc.	Active	200	3	950 @ 3	35	1 @ 200	DO-201AD	-55 to 150	ROHS3
SF34G	Taiwan Semiconductor Corporation	Active	200	3	950 @ 3	35	5 @ 200	DO-201AD	-55 to 150	ROHS3
SF34G A0G	Taiwan Semiconductor Corporation	Active	200	3	950 @ 3	35	5 @ 200	DO-201AD	-55 to 150	ROHS3
SF34GH	Taiwan Semiconductor Corporation	Active	200	3	950 @ 3	35	5 @ 200	DO-201AD	-55 to 150	ROHS3
EGP51D-E3/D	Vishay General Semiconductor - Diodes Division	Active	200	5	960 @ 5	50	5 @ 200	DO-201AD	-65 to 175	Not Applicable

Engineering Selection Recommendations

Primary Equivalent Selection: SF34G-TP (Micro Commercial Co) is the recommended direct equivalent for the obsolete ER302-TP. This part maintains identical electrical specifications (200 V, 3 A, 950 mV forward drop, 35 ns recovery time) and DO-201AD package compatibility. SF34G-TP is active in production status and ROHS3 compliant. The extended lower temperature rating (-65°C versus -55°C) provides additional operational margin without performance compromise.

Alternative Direct Equivalents: SF34G, SF34G A0G, and SF34GH (all Taiwan Semiconductor Corporation) provide parametric equivalence to the ER302-TP with identical electrical ratings and DO-201AD packaging. SF34GH includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade component certification. ER302_R2_00001 (Panjit International Inc.) offers parametric equivalence with improved reverse leakage characteristics (1 µA versus 5 µA @ 200 V).

Performance-Enhanced Substitute: EGP51D-E3/D (Vishay General Semiconductor - Diodes Division) represents a performance upgrade option with 5 A current rating (versus 3 A) and extended temperature range (-65°C to 175°C). This part maintains 200 V reverse voltage and DO-201AD package compatibility. The increased current capacity and temperature range accommodate applications requiring enhanced thermal and electrical margins. Reverse recovery time increases to 50 ns, which remains within fast recovery classification.

Procurement Considerations: All recommended substitutes are active production parts with ROHS3 compliance status. Packaging format availability varies: SF34G-TP is supplied in Tape & Reel format; SF34G, SF34G A0G, and SF34GH are supplied in Cut Tape format; EGP51D-E3/D packaging is unspecified. Inventory availability ranges from 713 to 3356 pieces across active alternatives.

Frequently Asked Questions (FAQ)

Q: Can SF34G-TP directly replace ER302-TP in existing designs?

A: Yes. SF34G-TP maintains identical electrical specifications (200 V reverse voltage, 3 A average rectified current, 950 mV forward drop, 35 ns reverse recovery time) and DO-201AD through-hole package format. The extended lower temperature rating (-65°C minimum versus -55°C) provides additional operational margin. No circuit modifications are required.

Q: What is the difference between SF34G, SF34G A0G, and SF34GH?

A: All three parts are manufactured by Taiwan Semiconductor Corporation and provide identical electrical specifications matching the ER302-TP (200 V, 3 A, 950 mV, 35 ns recovery time). SF34GH includes AEC-Q101 automotive qualification and automotive-grade classification, making it suitable for automotive applications. SF34G and SF34G A0G are standard industrial-grade components. All three use DO-201AD packaging and are supplied in Cut Tape format.

Q: Why does EGP51D-E3/D have different electrical parameters?

A: EGP51D-E3/D is classified as a performance-enhanced substitute rather than a direct equivalent. It maintains the 200 V reverse voltage and DO-201AD package compatibility but increases the average rectified current rating to 5 A (versus 3 A) and extends the operating temperature range to -65°C to 175°C. The reverse recovery time increases to 50 ns. This part is suitable for applications requiring higher current capacity or extended temperature operation.

Q: Are all substitute parts RoHS compliant?

A: SF34G-TP, ER302_R2_00001, SF34G, SF34G A0G, and SF34GH are all ROHS3 compliant. EGP51D-E3/D has RoHS status listed as Not Applicable. Verify RoHS compliance requirements for your specific application before final part selection.

Q: What packaging formats are available for substitute parts?

A: SF34G-TP is supplied in Tape & Reel (TR) format. SF34G, SF34G A0G, and SF34GH are supplied in Cut Tape (CT) format. EGP51D-E3/D packaging format is not specified in available data. Confirm packaging format compatibility with your assembly process requirements.

Q: Can ER302_R2_00001 be used as a direct replacement?

A: Yes. ER302_R2_00001 (Panjit International Inc.) provides parametric equivalence with identical reverse voltage (200 V), current rating (3 A), forward voltage (950 mV @ 3 A), and reverse recovery time (35 ns). It offers improved reverse leakage characteristics (1 µA @ 200 V versus 5 µA @ 200 V). Operating temperature range matches the original part (-55°C to 150°C). DO-201AD package and through-hole mounting are identical.

Q: Is automotive qualification available for ER302-TP substitutes?

A: Yes. SF34GH (Taiwan Semiconductor Corporation) includes AEC-Q101 automotive qualification and automotive-grade classification. This part maintains all electrical specifications of the ER302-TP and is suitable for automotive applications requiring qualified components.

Q: What is the inventory status of substitute parts?

A: All recommended substitute parts are listed as active production components with new original stock available. Inventory quantities range from 713 pieces (SF34GH) to 3356 pieces (SF34G). SF34G-TP has 1046 pieces in stock. Verify current inventory availability with your supplier for procurement planning.

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