HER106G-AP Equivalent & Substitute Parts

Part Overview

The HER106G-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 600 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where original components are no longer readily available or where design flexibility permits alternative selections.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 125	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the HER106G-AP is determined by strict electrical and mechanical compatibility criteria. The following parameters must be met or exceeded in substitute parts:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Mounting Type: Must be Through Hole
Package / Case: Must be compatible with DO-204AL, DO-41, or Axial configurations

Secondary Compatibility Parameters:

Voltage - Forward (Vf): Lower values indicate improved efficiency; values up to 2.5 V are acceptable for general-purpose applications
Reverse Recovery Time (trr): Fast recovery (≤ 500 ns) preferred for switching applications; standard recovery (> 500 ns) acceptable for linear rectification
Operating Temperature Range: Extended ranges provide design margin but are not mandatory
RoHS and REACH Compliance: All substitutes must maintain regulatory compliance

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (1 A rated current): 1N4937RLG, BA158G A0G, RGP10JE-E3/53, RGP10JE-E3/73, SBYV26C-E3/73

Category B - Higher Current Capability (2 A rated current, suitable for derating applications): MUR260RLG

Category C - Reduced Current Capability (800 mA rated current, suitable only where circuit permits): GP08J-E3/54

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Package	Tj Range [°C]	Product Status
HER106G-AP	Micro Commercial Co	600	1	1.7 @ 1 A	Fast Recovery ≤ 500ns	75	DO-41	-55 to 125	Not For New Designs
1N4937RLG	onsemi	600	1	1.2 @ 1 A	Fast Recovery ≤ 500ns	300	Axial	-65 to 150	Not For New Designs
BA158G A0G	Taiwan Semiconductor Corporation	600	1	1.2 @ 1 A	Fast Recovery ≤ 500ns	150	DO-204AL (DO-41)	-55 to 150	Active
GP08J-E3/54	Vishay General Semiconductor - Diodes Division	600	0.8	1.3 @ 800 mA	Standard Recovery > 500ns	2000	DO-204AL (DO-41)	-65 to 175	Active
MUR260RLG	onsemi	600	2	1.35 @ 2 A	Fast Recovery ≤ 500ns	75	Axial	-65 to 175	Active
RGP10JE-E3/53	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1 A	Fast Recovery ≤ 500ns	150	DO-204AL (DO-41)	-65 to 175	Active
RGP10JE-E3/73	Vishay General Semiconductor - Diodes Division	600	1	1.3 @ 1 A	Fast Recovery ≤ 500ns	250	DO-204AL (DO-41)	-65 to 175	Active
SBYV26C-E3/73	Vishay General Semiconductor - Diodes Division	600	1	2.5 @ 1 A	Fast Recovery ≤ 500ns	30	DO-204AL (DO-41)	-65 to 175	Active

Engineering Selection Recommendations

For Direct Replacement (Preferred):

Select BA158G A0G, RGP10JE-E3/53, or RGP10JE-E3/73 as primary substitutes. These parts maintain 600 V / 1 A electrical ratings, through-hole mounting compatibility, and DO-204AL (DO-41) package compatibility. All three are classified as Active products, ensuring long-term availability and supply chain stability. BA158G A0G offers the lowest forward voltage (1.2 V) and moderate recovery time (150 ns), providing optimal efficiency for linear rectification. RGP10JE variants offer extended operating temperature ranges (-65 to 175°C) and are part of the SUPERECTIFIER® series, suitable for applications requiring enhanced thermal performance.

For Applications Permitting Higher Current Capability:

MUR260RLG provides 2 A rated current at 600 V with identical fast recovery characteristics (75 ns trr) to the original HER106G-AP. This part is suitable for derating applications or where future design margin is required. MUR260RLG is classified as Active and carries the SWITCHMODE™ series designation, indicating suitability for switching power supply applications.

For Applications Permitting Reduced Current:

GP08J-E3/54 operates at 800 mA and is suitable only where circuit analysis confirms current requirements do not exceed this rating. This part features standard recovery characteristics (2 µs trr) and extended temperature range (-65 to 175°C), making it appropriate for linear rectification in temperature-sensitive environments.

Regulatory and Compliance Considerations:

All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the original HER106G-AP regulatory profile. Selection should prioritize Active product status to ensure continued manufacturing support and supply availability.

Frequently Asked Questions (FAQ)

Q: Can the 1N4937RLG directly replace the HER106G-AP?

A: The 1N4937RLG meets the critical electrical specifications (600 V, 1 A) and fast recovery classification. However, it is supplied in Axial package format rather than the original DO-41 package. Mechanical compatibility with the PCB layout must be verified. Additionally, 1N4937RLG is classified as "Not For New Designs," offering no supply advantage over the original part.

Q: What is the difference between fast recovery and standard recovery diodes?

A: Fast recovery diodes (trr ≤ 500 ns) are optimized for switching applications where rapid reverse recovery minimizes switching losses and electromagnetic interference. Standard recovery diodes (trr > 500 ns) are suitable for linear rectification and lower-frequency applications. The HER106G-AP specifies fast recovery; substitutes should maintain this classification unless circuit analysis confirms standard recovery is acceptable.

Q: Is the MUR260RLG suitable as a substitute despite its 2 A rating?

A: Yes. The MUR260RLG exceeds the 1 A requirement and maintains all other critical parameters (600 V, fast recovery, through-hole mounting, DO-41 compatible package). Higher current rating provides design margin and does not create incompatibility. The part operates at lower stress levels when used in 1 A circuits, potentially extending service life.

Q: Why does SBYV26C-E3/73 have a higher forward voltage (2.5 V) than other substitutes?

A: SBYV26C-E3/73 is optimized for ultra-fast recovery (30 ns trr), which is achieved through different semiconductor junction design. The higher forward voltage is a trade-off inherent to this technology. This part is suitable for high-frequency switching applications where recovery speed is critical; it is not recommended for linear rectification where forward voltage efficiency is prioritized.

Q: Can I use the GP08J-E3/54 (800 mA) in place of the HER106G-AP (1 A)?

A: Only if circuit analysis confirms the maximum current requirement does not exceed 800 mA. The GP08J-E3/54 is rated for 800 mA average rectified current; operation above this rating violates the component specification and may result in thermal failure. This part is suitable for derating applications or where the original design includes current margin.

Q: What packaging considerations apply to axial versus DO-41 packages?

A: Axial packages (1N4937RLG, MUR260RLG) feature leads extending from opposite ends of the component body, suitable for through-hole PCBs with axial lead spacing. DO-41 packages (BA158G A0G, RGP10JE variants, SBYV26C-E3/73) feature leads extending from the same end, suitable for standard through-hole PCBs with radial or bent-lead mounting. PCB layout compatibility must be verified before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the original HER106G-AP. This ensures compatibility with modern manufacturing and environmental standards.

Q: Which substitute offers the best thermal performance?

A: RGP10JE-E3/53, RGP10JE-E3/73, and MUR260RLG all feature extended operating temperature ranges (-65 to 175°C) compared to the original HER106G-AP (-55 to 125°C). These parts are suitable for applications requiring enhanced thermal margin or operation in elevated ambient temperatures.

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