HER105-AP Equivalent & Substitute Parts

Part Overview

The HER105-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The HER105-AP features fast recovery characteristics with a reverse recovery time of 50 ns, suitable for standard rectification applications requiring moderate switching speeds.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	5 mA @ 400 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the HER105-AP is determined by matching the following critical electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial compatible

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Must not exceed application requirements
Current - Reverse Leakage @ Vr: Lower values indicate superior performance
Operating Temperature - Junction: Must accommodate application thermal environment
RoHS Compliance: ROHS3 Compliant status for regulatory alignment

Substitute parts are grouped into two categories: Upgrade parts that maintain or improve upon the original specifications while offering active product status, and Similar parts that meet the core electrical requirements with variations in recovery speed, current rating, or temperature range.

Parameter Comparison

Parameter	HER105-AP	GPP10G-E3/54	BA157GHR1G	GP08GE-E3/54	MUR240RLG	RGP10G
Manufacturer	Micro Commercial Co	Vishay General Semiconductor	Taiwan Semiconductor Corporation	Vishay General Semiconductor	onsemi	Fairchild Semiconductor
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1 A	800 mA	2 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.2 V @ 1 A	1.3 V @ 800 mA	1.3 V @ 2 A	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	50 ns	Not specified	150 ns	2 µs	65 ns	150 ns
Current - Reverse Leakage @ Vr	5 mA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

GPP10G-E3/54 (Upgrade Substitute)

The GPP10G-E3/54 from Vishay General Semiconductor is the primary upgrade substitute for the HER105-AP. This part maintains identical voltage and current ratings (400 V, 1 A) with matching forward voltage characteristics (1.1 V @ 1 A). The GPP10G-E3/54 offers active product status, extended operating temperature range (-55°C ~ 150°C), and ROHS3 compliance. The primary trade-off is standard recovery speed (>500ns) compared to the HER105-AP's fast recovery (≤500ns). This substitute is suitable for applications where switching speed is not a critical constraint.

BA157GHR1G (Similar Substitute - Automotive Grade)

The BA157GHR1G from Taiwan Semiconductor Corporation provides an active alternative with automotive qualification (AEC-Q101). This part matches the 400 V, 1 A electrical specifications with fast recovery characteristics (150 ns trr). The forward voltage is slightly elevated at 1.2 V @ 1 A. The extended operating temperature range (-55°C ~ 150°C) and automotive-grade certification make this suitable for applications requiring automotive-level reliability and traceability.

MUR240RLG (Similar Substitute - Higher Current Rating)

The MUR240RLG from onsemi is a higher-current alternative rated for 2 A at 400 V, providing design margin for applications with potential current growth. This part features fast recovery characteristics (65 ns trr) and extended operating temperature range (-65°C ~ 175°C). The MUR240RLG is suitable as a direct substitute when higher current capacity is beneficial or when thermal performance is a design consideration.

RGP10G (Similar Substitute - Fairchild)

The RGP10G from Fairchild Semiconductor matches the HER105-AP electrical specifications (400 V, 1 A) with fast recovery characteristics (150 ns trr). This part offers extended operating temperature range (-65°C ~ 175°C) and is available in bulk packaging. The RGP10G is suitable for high-volume applications where cost optimization and temperature margin are priorities.

GP08GE-E3/54 (Partial Substitute - Lower Current Rating)

The GP08GE-E3/54 from Vishay General Semiconductor is rated for 800 mA at 400 V, below the HER105-AP's 1 A specification. This part is suitable only for applications where the actual operating current does not exceed 800 mA. The extended operating temperature range (-65°C ~ 175°C) and SUPERECTIFIER® series designation indicate enhanced performance characteristics. Use this substitute only when current requirements are confirmed below 800 mA.

Frequently Asked Questions (FAQ)

Q: Can the GPP10G-E3/54 directly replace the HER105-AP in all applications?

A: The GPP10G-E3/54 is electrically compatible for voltage and current ratings. The primary difference is recovery speed: GPP10G-E3/54 operates at standard recovery (>500ns) while HER105-AP is fast recovery (≤500ns). Direct replacement is suitable for applications where switching frequency and recovery speed are not critical design parameters. Applications involving high-frequency switching or tight timing requirements should evaluate the impact of slower recovery characteristics.

Q: What is the significance of the reverse leakage current difference between HER105-AP and substitute parts?

A: The HER105-AP specifies 5 mA reverse leakage at 400 V, while most substitute parts specify 5 µA at 400 V. The substitute parts exhibit 1000 times lower reverse leakage, indicating superior blocking characteristics and lower standby current consumption. This improvement is beneficial for applications with stringent leakage requirements or extended standby operation.

Q: Is the MUR240RLG suitable as a substitute despite its 2 A rating versus the HER105-AP's 1 A rating?

A: Yes, the MUR240RLG is suitable as a substitute. Higher current ratings provide design margin and do not create compatibility issues in applications designed for 1 A operation. The MUR240RLG's 2 A rating allows for future design flexibility and improved thermal performance due to lower current density. Verify that the axial package format is compatible with the application's PCB layout.

Q: Why does the GP08GE-E3/54 have a lower current rating than the HER105-AP?

A: The GP08GE-E3/54 is rated for 800 mA, which is below the HER105-AP's 1 A specification. This part is suitable only for applications where actual operating current does not exceed 800 mA. Confirm application current requirements before selecting this substitute. Using this part in applications requiring sustained 1 A operation will result in thermal stress and reduced component reliability.

Q: What packaging considerations apply when substituting these diodes?

A: All substitute parts are available in DO-204AL, DO-41, or Axial package formats compatible with through-hole mounting. Verify the specific supplier device package (e.g., GPP10G-E3/54 is supplied in DO-204AL (DO-41) format) matches your PCB layout and assembly process. The MUR240RLG is supplied in Axial format, which may require different PCB footprint design compared to the radial DO-41 package.

Q: Are all substitute parts RoHS3 compliant?

A: GPP10G-E3/54, BA157GHR1G, GP08GE-E3/54, and MUR240RLG are confirmed ROHS3 compliant. RGP10G compliance status is not specified in available documentation. Verify RoHS compliance status with the supplier for RGP10G if regulatory compliance is a design requirement.

Q: What is the impact of operating temperature range differences on part selection?

A: The HER105-AP operates from -55°C to 125°C. Most substitute parts extend this range to -55°C to 150°C or -65°C to 175°C. Extended temperature ranges provide design margin for applications with elevated ambient or self-heating conditions. Applications operating near the upper temperature limit of the HER105-AP (-55°C to 125°C) benefit from substitutes with extended ranges. Verify application thermal requirements before final part selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message