HER205G Equivalent & Substitute Parts

Part Overview

The HER205G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 V DC reverse voltage and 2 A average rectified current. The device is packaged in DO-204AC (DO-15) axial through-hole configuration and is classified as a fast recovery diode with a reverse recovery time of 50 ns. The HER205G maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified to address application requirements including component availability, inventory levels, performance optimization, and design flexibility across different manufacturers and product variants.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Package / Case	DO-204AC, DO-15, Axial	-
Mounting Type	Through Hole	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the HER205G are classified into two categories based on electrical parameter alignment:

Parametric Equivalents maintain identical or superior electrical specifications across all critical parameters: 400 V reverse voltage rating, 2 A average rectified current, 1.3 V forward voltage drop at 2 A, fast recovery speed classification (≤ 500ns), and DO-204AC through-hole packaging. These parts are direct functional replacements with no circuit redesign required.

Similar Parts share the same 400 V reverse voltage rating and DO-204AC package but differ in average rectified current rating (1 A or 1.5 A instead of 2 A) or recovery time characteristics. These parts are suitable for applications where the lower current rating is acceptable or where different recovery time performance is beneficial.

The following parameters determine substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Package / Case: Must be DO-204AC, DO-15, or Axial equivalent
Mounting Type: Must be Through Hole
Operating Temperature Range: Must support -55°C to 150°C minimum
RoHS Compliance: Must maintain ROHS3 status

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Speed	Temp Range [°C]	Grade
HER205G	Taiwan Semiconductor	400	2	1.3 @ 2A	50	5 @ 400V	Fast Recovery ≤ 500ns	-55 to 150	Standard
SF26G	Taiwan Semiconductor	400	2	1.3 @ 2A	35	5 @ 400V	Fast Recovery ≤ 500ns	-55 to 150	Standard
SF26G A0G	Taiwan Semiconductor	400	2	1.3 @ 2A	35	5 @ 400V	Fast Recovery ≤ 500ns	-55 to 150	Standard
SF26GH	Taiwan Semiconductor	400	2	1.3 @ 2A	35	5 @ 400V	Fast Recovery ≤ 500ns	-55 to 150	Automotive AEC-Q101
SF2L6GH	Taiwan Semiconductor	400	2	1.3 @ 2A	35	1 @ 400V	Fast Recovery ≤ 500ns	-55 to 150	Automotive AEC-Q101
EGP20G	Fairchild Semiconductor	400	2	1.25 @ 2A	50	5 @ 400V	Fast Recovery ≤ 500ns	-65 to 150	Standard
1N5060GP-E3/54	Vishay General Semiconductor	400	1	1.2 @ 1A	2000	5 @ 400V	Standard Recovery >500ns	-65 to 175	Standard
1N5617GP-E3/54	Vishay General Semiconductor	400	1	1.2 @ 1A	150	0.5 @ 400V	Fast Recovery ≤ 500ns	-65 to 175	Standard
GP15G-E3/54	Vishay General Semiconductor	400	1.5	1.1 @ 1.5A	3500	5 @ 400V	Standard Recovery >500ns	-65 to 175	Standard
RGP15G-E3/54	Vishay General Semiconductor	400	1.5	1.3 @ 1.5A	150	5 @ 400V	Fast Recovery ≤ 500ns	-65 to 175	Standard

Engineering Selection Recommendations

Parametric Equivalent Selection (Direct Replacement)

The SF26G, SF26G A0G, SF26GH, and SF2L6GH parts from Taiwan Semiconductor Corporation are parametric equivalents to the HER205G. All four parts maintain the 400 V reverse voltage rating, 2 A average rectified current, and fast recovery speed classification. The SF26G and SF26G A0G variants are standard-grade devices with identical electrical performance. The SF26GH and SF2L6GH variants include automotive-grade qualification (AEC-Q101), with SF2L6GH offering reduced reverse leakage current (1 µA versus 5 µA). These parts are suitable for direct substitution in applications where the HER205G is specified.

The EGP20G from Fairchild Semiconductor is a direct parametric equivalent with matching 400 V, 2 A, and fast recovery specifications. The EGP20G provides extended operating temperature range (-65°C to 150°C) and maintains RoHS3 compliance. This part is suitable for direct circuit replacement.

Similar Part Selection (Current-Rated Alternatives)

The 1N5060GP-E3/54 and 1N5617GP-E3/54 from Vishay General Semiconductor are rated for 1 A average rectified current, which is 50% of the HER205G rating. These parts are suitable only for applications where the circuit current requirement does not exceed 1 A. The 1N5617GP-E3/54 offers fast recovery performance (150 ns) with significantly reduced reverse leakage (0.5 µA), while the 1N5060GP-E3/54 provides standard recovery characteristics.

The GP15G-E3/54 and RGP15G-E3/54 from Vishay General Semiconductor are rated for 1.5 A average rectified current. These parts are suitable for applications where the circuit current requirement does not exceed 1.5 A. The RGP15G-E3/54 offers fast recovery performance (150 ns), while the GP15G-E3/54 provides standard recovery characteristics.

All substitute parts maintain 400 V reverse voltage rating, DO-204AC through-hole packaging, RoHS3 compliance, and operating temperature support for the HER205G specification range.

Frequently Asked Questions (FAQ)

Q: Can SF26G be used as a direct replacement for HER205G?

A: Yes. The SF26G maintains identical electrical specifications: 400 V reverse voltage, 2 A average rectified current, 1.3 V forward voltage drop at 2 A, and fast recovery speed classification. The SF26G is packaged in DO-204AC through-hole configuration and is RoHS3 compliant. No circuit modifications are required.

Q: What is the difference between SF26G and SF26GH?

A: Both parts share identical electrical specifications (400 V, 2 A, fast recovery). The SF26GH is qualified to automotive-grade AEC-Q101 standard, making it suitable for automotive applications. The SF26G is standard-grade. Selection depends on application requirements.

Q: Is SF2L6GH suitable for the HER205G application?

A: Yes. The SF2L6GH maintains the 400 V, 2 A, and fast recovery specifications required for HER205G replacement. The SF2L6GH offers improved reverse leakage performance (1 µA versus 5 µA) and automotive-grade AEC-Q101 qualification. This part is suitable for direct substitution.

Q: Can 1N5060GP-E3/54 replace HER205G?

A: The 1N5060GP-E3/54 is rated for 1 A average rectified current, which is 50% of the HER205G 2 A rating. This part is suitable only if the application circuit current does not exceed 1 A. The 1N5060GP-E3/54 provides standard recovery characteristics (2 µs) rather than fast recovery. Verify circuit current requirements before substitution.

Q: What is the advantage of 1N5617GP-E3/54 over 1N5060GP-E3/54?

A: Both parts are rated for 1 A average rectified current. The 1N5617GP-E3/54 offers fast recovery performance (150 ns) compared to standard recovery (2 µs) in the 1N5060GP-E3/54. The 1N5617GP-E3/54 also provides significantly lower reverse leakage (0.5 µA versus 5 µA). Selection depends on application switching frequency and leakage current requirements.

Q: Can RGP15G-E3/54 replace HER205G?

A: The RGP15G-E3/54 is rated for 1.5 A average rectified current, which is 75% of the HER205G 2 A rating. This part is suitable only if the application circuit current does not exceed 1.5 A. The RGP15G-E3/54 provides fast recovery performance (150 ns) and is packaged in DO-204AC through-hole configuration. Verify circuit current requirements before substitution.

Q: Is EGP20G from Fairchild Semiconductor a direct replacement?

A: Yes. The EGP20G maintains 400 V reverse voltage, 2 A average rectified current, and fast recovery speed classification. The EGP20G is packaged in DO-15 through-hole configuration and provides extended operating temperature range (-65°C to 150°C). No circuit modifications are required for substitution.

Q: What packaging considerations apply to these substitute parts?

A: All substitute parts listed are packaged in DO-204AC or DO-15 axial through-hole configuration, which is mechanically and electrically compatible with the HER205G DO-204AC package. No PCB layout modifications are required for direct substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance status, matching the HER205G environmental compliance requirement.

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

A: Fast recovery diodes have reverse recovery time (trr) of 500 ns or less, while standard recovery diodes exceed 500 ns. Fast recovery diodes are suitable for high-frequency switching applications. The HER205G specifies fast recovery (50 ns). Parametric equivalents (SF26G, SF26GH, SF2L6GH, EGP20G) maintain fast recovery performance. Similar parts with standard recovery (1N5060GP-E3/54, GP15G-E3/54) are suitable only for lower-frequency applications.

Q: Can I use a lower-current-rated diode if my circuit only draws partial current?

A: Yes, provided the circuit maximum current does not exceed the substitute part rating. For example, if the circuit draws maximum 1 A, the 1N5060GP-E3/54 (1 A rating) is suitable. If the circuit draws maximum 1.5 A, the GP15G-E3/54 or RGP15G-E3/54 (1.5 A rating) is suitable. Always verify actual circuit current requirements against the substitute part current rating.

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