HER605-AP Equivalent & Substitute Parts

Part Overview

The HER605-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 6 A average rectified current in an R-6 axial through-hole package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for continued circuit implementation. Substitute parts must maintain electrical and mechanical compatibility across voltage, current, thermal, and package specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 6 A	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	10 @ 400 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	R-6, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the HER605-AP is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 6 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 6 A
Mounting Type: Through Hole
Package / Case: R-6, Axial
Operating Temperature - Junction: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

Reverse Recovery Time (trr): Acceptable range 50 ns to 150 ns (within fast recovery classification)
Capacitance @ Vr, F: Acceptable range 80 pF to 150 pF @ 4V, 1MHz
Current - Reverse Leakage @ Vr: 10 µA @ 400 V (fixed specification)

Substitute parts are classified into two groups: direct manufacturer equivalents (identical base product number) and parametric equivalents (alternative manufacturers with allowable parameter variations within specified tolerances).

Parameter Comparison

Parameter	HER605-AP (Main)	HER605GP-AP	FR604GP-AP	FR604B-G	HER605G A0G
Manufacturer	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	Comchip Technology	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	6 A	6 A	6 A	6 A	6 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 6 A	1.3 V @ 6 A	1.3 V @ 6 A	1.3 V @ 6 A	1.3 V @ 6 A
Reverse Recovery Time (trr)	50 ns	50 ns	150 ns	150 ns	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V
Capacitance @ Vr, F	100 pF @ 4V, 1MHz	100 pF @ 4V, 1MHz	150 pF @ 4V, 1MHz	100 pF @ 4V, 1MHz	80 pF @ 4V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	R-6, Axial	R-6, Axial	R-6, Axial	R-6, Axial	R-6, Axial
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
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

HER605GP-AP (Micro Commercial Co)

This part is the direct active equivalent of the HER605-AP. It maintains identical electrical specifications including 50 ns reverse recovery time and 100 pF capacitance. Product status is active with 860 units in stock. This substitute is the primary selection for direct replacement applications requiring no circuit redesign.

HER605G A0G (Taiwan Semiconductor Corporation)

This part is a parametric equivalent manufactured by Taiwan Semiconductor Corporation. It maintains the same base product number (HER605) and identical reverse recovery time (50 ns). Capacitance is reduced to 80 pF, which is within acceptable tolerance. Product status is active with 998 units in stock. This substitute is suitable for applications where lower capacitance is beneficial or neutral to circuit performance.

FR604GP-AP (Micro Commercial Co)

This part is a parametric equivalent with extended reverse recovery time of 150 ns and increased capacitance of 150 pF. Both parameters remain within the fast recovery classification and acceptable tolerance bands. Product status is active with 746 units in stock. This substitute is suitable for applications where the extended recovery time and increased capacitance do not degrade circuit performance.

FR604B-G (Comchip Technology)

This part is a parametric equivalent with extended reverse recovery time of 150 ns. Capacitance remains at 100 pF. Packaging is specified as Tape & Box (TB). Product status is active with 989 units in stock. This substitute is suitable for applications where the extended recovery time is acceptable and tape & box packaging is compatible with assembly processes.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical thermal operating range. Selection among active equivalents should be based on availability, packaging format compatibility, and circuit-specific tolerance for reverse recovery time and capacitance variations.

Frequently Asked Questions (FAQ)

Q: Can HER605GP-AP be used as a direct replacement for HER605-AP?

A: Yes. HER605GP-AP is the direct active equivalent with identical electrical specifications. It maintains 400 V reverse voltage, 6 A average rectified current, 1.3 V forward voltage, 50 ns reverse recovery time, and 100 pF capacitance. The only difference is product status (active vs. obsolete).

Q: What is the difference between HER605GP-AP and FR604GP-AP?

A: Both parts meet the mandatory electrical specifications (400 V, 6 A, 1.3 V forward voltage). The primary differences are reverse recovery time (50 ns vs. 150 ns) and capacitance (100 pF vs. 150 pF). FR604GP-AP has a longer recovery time and higher capacitance, both within acceptable tolerance for fast recovery diodes. Selection depends on circuit requirements for switching speed and capacitive effects.

Q: Is HER605G A0G suitable for high-speed switching applications?

A: HER605G A0G maintains the 50 ns reverse recovery time of the original HER605-AP, making it suitable for fast switching applications. Its capacitance of 80 pF is lower than the original 100 pF, which may provide improved high-frequency performance in certain circuit topologies.

Q: What does the R-6 axial package mean?

A: R-6 is a through-hole axial package designation for rectifier diodes. All substitute parts use identical R-6 axial packaging, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (HER605GP-AP, FR604GP-AP, FR604B-G, and HER605G A0G) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original HER605-AP specifications.

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

A: Reverse recovery time (trr) affects switching speed and switching losses. The HER605-AP, HER605GP-AP, and HER605G A0G have 50 ns recovery time. FR604GP-AP and FR604B-G have 150 ns recovery time. Both are classified as fast recovery diodes (≤ 500 ns). Selection depends on circuit switching frequency and acceptable power dissipation levels.

Q: Can FR604B-G be used if tape & box packaging is required?

A: Yes. FR604B-G is specified with Tape & Box (TB) packaging, making it suitable for automated assembly processes requiring reel packaging. All other substitutes have unspecified packaging formats. Verify packaging compatibility with assembly requirements before selection.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across the identical junction temperature range of -55°C to 150°C, matching the original HER605-AP specification.

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