HER302-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The HER302-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 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 alternatives for ongoing design support and procurement. Substitute parts listed maintain identical electrical specifications and mechanical compatibility while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Package / Case	DO-201AD, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the HER302-TP is determined by strict equivalence across the following parameters: Voltage - DC Reverse (Vr) maximum of 100 V, Current - Average Rectified (Io) of 3 A, Voltage - Forward (Vf) maximum of 1 V at 3 A, Reverse Recovery Time (trr) of 50 ns, Current - Reverse Leakage of 10 µA at 100 V, and mechanical compatibility with DO-201AD axial through-hole package. All listed substitute parts meet these core electrical and mechanical requirements. Secondary parameters including Capacitance @ Vr and specific packaging formats (Cut Tape, Tape & Reel) vary within acceptable ranges and do not affect functional substitution.

Parameter Comparison

Parameter	HER302-TP	HER302G	UF301G_R2_00001	UF5401-E3/54	UF5401-E3/73
Manufacturer	Micro Commercial Co	Taiwan Semiconductor Corporation	Panjit International Inc.	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1 V @ 3 A	1 V @ 3 A	1 V @ 3 A	1 V @ 3 A
Reverse Recovery Time (trr)	50 ns	50 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 100 V	1 µA @ 100 V	10 µA @ 100 V	10 µA @ 100 V
Capacitance @ Vr, F	80 pF @ 4V, 1MHz	60 pF @ 4V, 1MHz	75 pF @ 4V, 1MHz	45 pF @ 4V, 1MHz	45 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°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Bulk	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)

Engineering Selection Recommendations

All substitute parts listed—HER302G, UF301G_R2_00001, UF5401-E3/54, and UF5401-E3/73—are electrically and mechanically equivalent to the HER302-TP and maintain ROHS3 compliance. Selection among active alternatives should be based on product availability, packaging format requirements, and supply chain considerations. The HER302G from Taiwan Semiconductor Corporation and UF301G_R2_00001 from Panjit International Inc. maintain closest parametric alignment with the original part. The UF5401-E3/54 and UF5401-E3/73 variants from Vishay General Semiconductor offer higher inventory availability and are supplied in Cut Tape format. All substitute parts operate within the specified temperature range of -55°C to 150°C junction temperature and satisfy industrial compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can HER302G be used as a direct replacement for HER302-TP?

A: Yes. HER302G meets all electrical specifications including 100 V reverse voltage, 3 A average rectified current, 1 V forward voltage at 3 A, and 50 ns reverse recovery time. Both parts use DO-201AD axial through-hole packaging and operate across -55°C to 150°C. HER302G is active product status, whereas HER302-TP is obsolete.

Q: What is the difference between UF5401-E3/54 and UF5401-E3/73?

A: Both UF5401-E3/54 and UF5401-E3/73 are electrically identical with matching 100 V, 3 A, 50 ns specifications. The designations reflect different tape reel configurations or manufacturing date codes. Both are supplied in Cut Tape format and are functionally interchangeable for the HER302-TP application.

Q: Does UF301G_R2_00001 have different leakage characteristics?

A: UF301G_R2_00001 specifies 1 µA reverse leakage at 100 V, compared to 10 µA for HER302-TP, HER302G, and the UF5401 variants. This represents superior leakage performance and does not prevent substitution. Lower leakage is a beneficial characteristic for rectifier applications.

Q: Are packaging format differences significant for through-hole assembly?

A: Packaging format differences (Bulk, Tape & Reel, Cut Tape) relate to supply and handling methods, not component performance. All substitute parts are through-hole mounted in DO-201AD axial configuration and are mechanically compatible with existing PCB designs. Format selection depends on assembly process requirements and procurement volume.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. HER302G, UF301G_R2_00001, UF5401-E3/54, and UF5401-E3/73 are all ROHS3 compliant, matching the compliance status of the original HER302-TP part.

Q: What is the significance of capacitance variation among substitute parts?

A: Capacitance @ Vr varies from 45 pF (UF5401 variants) to 80 pF (HER302-TP) at 4V, 1MHz. This parameter does not affect rectification function and remains within acceptable ranges for general purpose rectifier applications. Capacitance variation reflects manufacturing process differences between suppliers and does not impact electrical substitution.

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