HER152G A0G Equivalent & Substitute Parts

Part Overview

The HER152G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 1.5 A average rectified current in a through-hole DO-204AC (DO-15) axial package. This component is classified as Active product status with fast recovery characteristics (≤500 ns). Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications align with the original specification, enabling direct replacement in circuit applications without design modification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1.5 A	V @ A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the HER152G A0G are classified into two functional groups based on electrical parameter alignment:

Group 1: Direct Current Rating Match (1.5 A) Parts maintaining the original 1.5 A average rectified current specification with 100 V reverse voltage rating and through-hole DO-204AC packaging. These substitutes preserve the exact current-handling capacity of the original design.

Group 2: Elevated Current Rating (2.0 A) Parts rated for 2.0 A average rectified current with 100 V reverse voltage and compatible through-hole DO-204AC packaging. These substitutes provide increased current capacity while maintaining voltage compatibility and mechanical form factor.

Critical Substitution Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V (mandatory match)
Mounting Type: Through Hole (mandatory match)
Package / Case: DO-204AC, DO-15, Axial (mandatory match)
Current - Average Rectified (Io): 1.5 A minimum (equal or greater acceptable)
Speed Classification: Fast Recovery ≤ 500ns (preferred for Group 1)
Reverse Recovery Time (trr): ≤ 50 ns (preferred for Group 1)
Operating Temperature Range: -55°C minimum, 150°C maximum (minimum requirement)
RoHS Status: ROHS3 Compliant (compliance requirement)

Parameter Comparison

Parameter	HER152G A0G	GP15B-E3/54	RGP15B-E3/54	EGP20B-E3/54	EGP20B-E3/73	EGP20B
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Fairchild Semiconductor
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1.5 A	1.1 V @ 1.5 A	1.3 V @ 1.5 A	950 mV @ 2 A	950 mV @ 2 A	950 mV @ 2 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns	3.5 µs	150 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V	5 µA @ 100 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-55 to 150°C	-65 to 175°C	-65 to 175°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Group 1 Substitutes (1.5 A Current Rating):

RGP15B-E3/54 (Vishay General Semiconductor - Diodes Division) is the preferred Group 1 substitute. This part maintains the 1.5 A current rating, 100 V reverse voltage, and DO-204AC package compatibility. It features fast recovery characteristics (≤500 ns) with 150 ns reverse recovery time, extended operating temperature range (-65 to 175°C), and ROHS3 compliance. Forward voltage is 1.3 V @ 1.5 A, representing a 0.3 V increase from the original specification.

GP15B-E3/54 (Vishay General Semiconductor - Diodes Division) is an alternative Group 1 substitute with identical current and voltage ratings. This part features standard recovery characteristics (>500 ns) with 3.5 µs reverse recovery time, extended operating temperature range (-65 to 175°C), and ROHS3 compliance. Forward voltage is 1.1 V @ 1.5 A. The standard recovery speed differentiates this part from the original fast recovery specification.

Group 2 Substitutes (2.0 A Current Rating):

EGP20B-E3/73 (Vishay General Semiconductor - Diodes Division) is the primary Group 2 substitute. This part provides 2.0 A average rectified current with 100 V reverse voltage and DO-204AC package compatibility. It features fast recovery characteristics (≤500 ns) with 50 ns reverse recovery time matching the original, extended operating temperature range (-65 to 150°C), and ROHS3 compliance. Forward voltage is 950 mV @ 2 A.

EGP20B-E3/54 (Vishay General Semiconductor - Diodes Division) is an alternative Group 2 substitute with identical electrical specifications to EGP20B-E3/73, differing only in packaging designation (Cut Tape variant). This part provides 2.0 A current capacity, 100 V reverse voltage, fast recovery (≤500 ns, 50 ns trr), and ROHS3 compliance.

EGP20B (Fairchild Semiconductor) is a Group 2 substitute providing 2.0 A current capacity with 100 V reverse voltage and DO-15 package compatibility. This part features fast recovery characteristics (≤500 ns) with 50 ns reverse recovery time and extended operating temperature range (-65 to 150°C). RoHS compliance status is not specified in available documentation.

All substitute parts maintain Active product status and are suitable for direct replacement based on voltage, current, package, and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can EGP20B-E3/73 replace HER152G A0G in all applications?

A: EGP20B-E3/73 is electrically compatible as a substitute. It maintains the 100 V reverse voltage rating and through-hole DO-204AC package form factor. The 2.0 A current rating exceeds the original 1.5 A specification, providing increased capacity. Reverse recovery time (50 ns) and speed classification (fast recovery ≤500 ns) match the original. Forward voltage is 950 mV @ 2 A compared to 1 V @ 1.5 A in the original. Operating temperature range is -65 to 150°C, meeting the original -55 to 150°C requirement. ROHS3 compliance is maintained.

Q: What is the difference between RGP15B-E3/54 and GP15B-E3/54?

A: Both parts maintain the 1.5 A current rating and 100 V reverse voltage of the original HER152G A0G. The primary difference is recovery speed classification. RGP15B-E3/54 features fast recovery (≤500 ns) with 150 ns reverse recovery time, matching the original speed specification. GP15B-E3/54 features standard recovery (>500 ns) with 3.5 µs reverse recovery time, representing slower switching behavior. Forward voltage differs: RGP15B-E3/54 is 1.3 V @ 1.5 A versus GP15B-E3/54 at 1.1 V @ 1.5 A. Both provide extended operating temperature range (-65 to 175°C) and ROHS3 compliance.

Q: Are all substitute parts available in the same package?

A: All substitute parts are available in through-hole DO-204AC (DO-15) axial package configuration, matching the original HER152G A0G mechanical form factor. Packaging designations may vary (Cut Tape, Bulk) reflecting supplier distribution methods, but the physical component package remains identical.

Q: What is the impact of forward voltage differences between substitutes?

A: Forward voltage variations affect power dissipation and circuit performance. HER152G A0G specifies 1 V @ 1.5 A. RGP15B-E3/54 specifies 1.3 V @ 1.5 A (0.3 V higher), while EGP20B variants specify 950 mV @ 2 A (50 mV lower at higher current). These differences influence heat generation and voltage drop across the diode in rectification circuits. Circuit design must accommodate these variations within acceptable operating parameters.

Q: Do all substitutes meet RoHS compliance requirements?

A: RGP15B-E3/54, GP15B-E3/54, EGP20B-E3/54, and EGP20B-E3/73 are explicitly ROHS3 compliant. EGP20B (Fairchild Semiconductor) does not specify RoHS compliance status in available documentation. Applications requiring RoHS certification should select from the explicitly compliant alternatives.

Q: What is the significance of reverse recovery time differences?

A: Reverse recovery time (trr) determines switching speed during diode turn-off. HER152G A0G specifies 50 ns. RGP15B-E3/54 specifies 150 ns (3× slower), while GP15B-E3/54 specifies 3.5 µs (70× slower). EGP20B variants specify 50 ns (matching original). Faster recovery times reduce switching losses and electromagnetic interference in high-frequency applications. Slower recovery times may introduce additional switching losses and noise.

Q: Can Group 2 substitutes (2.0 A) be used in circuits designed for 1.5 A diodes?

A: Group 2 substitutes with 2.0 A rating are mechanically and electrically compatible with circuits designed for 1.5 A diodes. The higher current rating provides design margin and does not create incompatibility. However, forward voltage and reverse recovery time characteristics differ from the original specification and must be evaluated for circuit performance impact.

Q: What operating temperature range should be considered for substitute selection?

A: HER152G A0G specifies -55 to 150°C junction operating temperature. All substitute parts specify -65 to 150°C or -65 to 175°C, exceeding the original range. Extended temperature ranges provide additional design margin and do not create incompatibility. Circuit thermal design must remain within the original -55 to 150°C specification unless system design is modified to utilize extended temperature capability.

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