ER301A-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The ER301A-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 150 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and procurement continuity. The ER301A-TP operates across a junction temperature range of -55°C to 150°C and complies with RoHS3 standards.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 150 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

Substitution of the ER301A-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 150 V
Current - Average Rectified (Io): Must equal or exceed 3 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 950 mV @ 3 A
Reverse Recovery Time (trr): Must not exceed 35 ns
Speed Classification: Must maintain Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

Package / Case: Must be DO-201AD, Axial
Mounting Type: Must be Through Hole

Compliance Criteria:

RoHS Status: Must be ROHS3 Compliant
Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Substitute parts are grouped into two categories: parametric equivalents (matching all electrical specifications) and functional substitutes (meeting or exceeding electrical requirements with enhanced ratings).

Parameter Comparison

Parameter	ER301A-TP (Main)	ER301A_R2_00001	SF33G	SF33GH	SF34G-TP
Manufacturer	Micro Commercial Co	Panjit International Inc.	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	150 V	150 V	150 V	150 V	200 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 150 V	1 µA @ 150 V	5 µA @ 150 V	5 µA @ 150 V	5 µA @ 200 V
Capacitance @ Vr, F	35 pF @ 4V, 1MHz	35 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz	50 pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-65 to 150°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade / Qualification	Standard	Standard	Standard	Automotive / AEC-Q101	Standard

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement):

The ER301A_R2_00001 manufactured by Panjit International Inc. is a parametric equivalent to the ER301A-TP. This part maintains identical electrical specifications (150 V reverse voltage, 3 A average rectified current, 950 mV forward voltage, 35 ns reverse recovery time) and mechanical compatibility (DO-201AD through-hole package). The ER301A_R2_00001 is in active product status with ROHS3 compliance and REACH unaffected designation. The reverse leakage current is lower (1 µA versus 5 µA), representing an improvement in performance characteristics. This part is suitable for direct substitution in applications requiring exact electrical and thermal performance matching.

Parametric Equivalent Selection with Enhanced Specifications:

The SF33G and SF33GH manufactured by Taiwan Semiconductor Corporation are parametric equivalents matching all critical electrical specifications of the ER301A-TP. Both parts maintain 150 V reverse voltage, 3 A average rectified current, 950 mV forward voltage, and 35 ns reverse recovery time. The SF33GH variant includes automotive-grade qualification (AEC-Q101), making it suitable for applications requiring automotive reliability standards. Both parts are in active product status with ROHS3 compliance and REACH unaffected designation. The capacitance specification differs (80 pF versus 35 pF), which may affect high-frequency circuit behavior.

Functional Substitute Selection (Enhanced Rating):

The SF34G-TP manufactured by Micro Commercial Co is a functional substitute with enhanced voltage rating (200 V versus 150 V). This part maintains the 3 A average rectified current, 950 mV forward voltage, and 35 ns reverse recovery time. The SF34G-TP is in active product status with ROHS3 compliance and extended operating temperature range (-65°C to 150°C). The higher voltage rating provides additional design margin in applications subject to voltage transients or overvoltage conditions. The capacitance specification is intermediate (50 pF versus 35 pF).

Frequently Asked Questions (FAQ)

Q: Can the ER301A_R2_00001 be used as a direct replacement for the ER301A-TP?

A: Yes. The ER301A_R2_00001 is a parametric equivalent with identical voltage (150 V), current (3 A), forward voltage (950 mV @ 3 A), and reverse recovery time (35 ns) specifications. Both parts use the DO-201AD through-hole package. The ER301A_R2_00001 is in active product status, whereas the ER301A-TP is obsolete. The lower reverse leakage current (1 µA versus 5 µA) represents an improvement.

Q: What is the difference between the SF33G and SF33GH?

A: The SF33G and SF33GH are electrically identical parametric equivalents of the ER301A-TP. The SF33GH includes automotive-grade qualification (AEC-Q101) and is designated for applications requiring automotive reliability standards. Both parts maintain identical electrical specifications and DO-201AD through-hole packaging.

Q: Can the SF34G-TP be used in place of the ER301A-TP?

A: Yes, with design consideration. The SF34G-TP is a functional substitute with a higher voltage rating (200 V versus 150 V). All other critical parameters match: 3 A average rectified current, 950 mV forward voltage, and 35 ns reverse recovery time. The higher voltage rating provides additional design margin. The SF34G-TP is in active product status and suitable for applications where enhanced voltage headroom is beneficial or required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (ER301A_R2_00001, SF33G, SF33GH, and SF34G-TP) are ROHS3 compliant. The ER301A-TP is also ROHS3 compliant.

Q: What is the impact of capacitance differences between substitute parts?

A: The ER301A-TP and ER301A_R2_00001 specify 35 pF capacitance at 4 V, 1 MHz. The SF33G and SF33GH specify 80 pF, and the SF34G-TP specifies 50 pF. Higher capacitance may affect high-frequency circuit behavior, switching characteristics, and EMI performance. Capacitance differences should be evaluated in applications with frequency-sensitive requirements or tight EMI specifications.

Q: Do all substitute parts use the same DO-201AD package?

A: Yes. All substitute parts (ER301A_R2_00001, SF33G, SF33GH, and SF34G-TP) use the DO-201AD axial through-hole package, ensuring mechanical and board-level compatibility with the ER301A-TP.

Q: What is the operating temperature range for each substitute part?

A: The ER301A-TP, ER301A_R2_00001, SF33G, and SF33GH operate across -55°C to 150°C junction temperature. The SF34G-TP extends the lower temperature limit to -65°C, providing a wider operating range suitable for applications in extreme cold environments.

Q: Is the SF33GH suitable for automotive applications?

A: Yes. The SF33GH is qualified to AEC-Q101 automotive standards and designated as automotive-grade. This qualification ensures compliance with automotive reliability and quality requirements. The SF33GH maintains all electrical specifications of the ER301A-TP while meeting automotive qualification criteria.

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