HER302-AP Equivalent & Substitute Parts

Part Overview

The HER302-AP is a general-purpose rectifier diode rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the same voltage and current ratings while offering improved availability and active product support.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (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 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the HER302-AP is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 3 A
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Substitution Categories:

Direct Manufacturer Equivalent: HER302G-AP maintains identical electrical specifications and packaging. This part is from the same manufacturer base product line (HER302) with active product status.

Parametric Equivalents: HER302G A0G (Taiwan Semiconductor Corporation) and UF5401-E3/73 (Vishay General Semiconductor - Diodes Division) meet all critical electrical parameters and package requirements. These parts are from active manufacturers with full compliance certifications.

Similar Substitute: EGP31B-E3/C (Vishay General Semiconductor - Diodes Division) meets voltage, current, and package specifications. This part offers enhanced performance characteristics including lower reverse leakage current (1 µA vs. 10 µA) and extended operating temperature range (-65°C to 175°C vs. -55°C to 150°C).

Higher Current Capability: UG4B-E3/54 (Vishay General Semiconductor - Diodes Division) is rated for 4 A average rectified current, exceeding the 3 A requirement. This part is suitable for applications requiring additional current margin while maintaining 100 V voltage rating and DO-201AD packaging.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	RoHS
HER302-AP	Micro Commercial Co	Obsolete	100	3	1 @ 3A	50	10 @ 100V	DO-201AD	-55 to 150	ROHS3
HER302G-AP	Micro Commercial Co	Active	100	3	0.95 @ 3A	50	10 @ 100V	DO-201AD	-55 to 150	ROHS3
EGP31B-E3/C	Vishay General Semiconductor - Diodes Division	Active	100	3	0.95 @ 3A	50	1 @ 100V	DO-201AD	-65 to 175	ROHS3
UG4B-E3/54	Vishay General Semiconductor - Diodes Division	Active	100	4	0.95 @ 4A	30	5 @ 100V	DO-201AD	-55 to 150	ROHS3
HER302G A0G	Taiwan Semiconductor Corporation	Active	100	3	1 @ 3A	50	10 @ 100V	DO-201AD	-55 to 150	ROHS3
UF5401-E3/73	Vishay General Semiconductor - Diodes Division	Active	100	3	1 @ 3A	50	10 @ 100V	DO-201AD	-55 to 150	ROHS3

Engineering Selection Recommendations

For Direct Replacement with Active Product Status: HER302G-AP is the primary recommendation. This part is from the same manufacturer base product line (HER302) and maintains identical electrical specifications to the obsolete HER302-AP. The part is currently active with 950 units in stock and carries full ROHS3 compliance.

For Multi-Source Availability: UF5401-E3/73 (Vishay General Semiconductor - Diodes Division) provides parametric equivalence with 2,657 units in stock. This part meets all electrical requirements and is supplied in Cut Tape packaging. REACH Unaffected status is confirmed.

For Enhanced Performance Characteristics: EGP31B-E3/C (Vishay General Semiconductor - Diodes Division) offers superior reverse leakage current (1 µA vs. 10 µA) and extended operating temperature range (-65°C to 175°C). This part is active with 870 units in stock and is supplied in Tape & Reel packaging.

For Higher Current Margin Applications: UG4B-E3/54 (Vishay General Semiconductor - Diodes Division) is rated for 4 A average rectified current, providing 33% additional current capacity. This part features faster reverse recovery time (30 ns vs. 50 ns) and lower reverse leakage current (5 µA). The part is active with 2,934 units in stock and is supplied in Cut Tape packaging.

For Parametric Equivalence from Alternative Manufacturer: HER302G A0G (Taiwan Semiconductor Corporation) provides identical electrical specifications with 811 units in stock. This part maintains the same base product number (HER302) and offers REACH Unaffected status.

All recommended substitutes are ROHS3 compliant and suitable for applications requiring 100 V, 3 A rectification in DO-201AD through-hole packages.

Frequently Asked Questions (FAQ)

Q: Can HER302G-AP directly replace HER302-AP in existing designs?

A: Yes. HER302G-AP is a direct equivalent with identical electrical specifications (100 V, 3 A, 50 ns reverse recovery time) and DO-201AD packaging. The primary difference is product status: HER302-AP is obsolete while HER302G-AP is active.

Q: What is the difference between the parametric equivalents (HER302G A0G and UF5401-E3/73) and the direct equivalent (HER302G-AP)?

A: All three parts meet the same electrical specifications (100 V, 3 A, 50 ns trr, 10 µA reverse leakage). The differences are manufacturer source and packaging format. HER302G-AP is from Micro Commercial Co, HER302G A0G is from Taiwan Semiconductor Corporation, and UF5401-E3/73 is from Vishay. Selection depends on supply chain requirements and packaging preferences (standard vs. Cut Tape vs. Tape & Reel).

Q: Why is EGP31B-E3/C listed as a similar substitute rather than a direct equivalent?

A: EGP31B-E3/C meets the core electrical requirements (100 V, 3 A, 50 ns trr, DO-201AD package) but differs in reverse leakage current (1 µA vs. 10 µA) and operating temperature range (-65°C to 175°C vs. -55°C to 150°C). These enhanced characteristics make it suitable for applications requiring lower leakage or extended temperature operation.

Q: Can UG4B-E3/54 be used as a substitute for HER302-AP?

A: Yes, with consideration for the higher current rating. UG4B-E3/54 is rated for 4 A average rectified current compared to the 3 A requirement of HER302-AP. This provides additional current margin. The part maintains 100 V voltage rating and DO-201AD packaging. Additional benefits include faster reverse recovery time (30 ns vs. 50 ns) and lower reverse leakage current (5 µA vs. 10 µA).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the compliance status of the original HER302-AP.

Q: What packaging formats are available for these substitutes?

A: HER302G-AP is supplied in standard packaging. EGP31B-E3/C is supplied in Tape & Reel (TR) format. UG4B-E3/54 and UF5401-E3/73 are supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements and volume considerations.

Q: Do all substitutes maintain the same operating temperature range as HER302-AP?

A: Most substitutes maintain the -55°C to 150°C range. EGP31B-E3/C extends this to -65°C to 175°C, offering broader temperature operation. Selection depends on application temperature requirements.

Q: What is the current inventory status for these parts?

A: HER302G-AP: 950 units. EGP31B-E3/C: 870 units. UG4B-E3/54: 2,934 units. HER302G A0G: 811 units. UF5401-E3/73: 2,657 units. Inventory levels support both prototype and production volume requirements.

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