HER205G-TP Equivalent & Substitute Parts

Part Overview

The HER205G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 2 A average rectified current in a through-hole DO-15 package. This component is classified as Active and complies with ROHS3 and REACH standards. Substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure functional equivalence in circuit applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the HER205G-TP are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

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

The identified substitutes SF26G and SF26G A0G from Taiwan Semiconductor Corporation meet all critical electrical specifications and mechanical requirements. Both parts are rated for identical voltage and current parameters, operate within the same temperature range, and are housed in compatible through-hole packages. Reverse recovery time values differ (35 ns versus 50 ns), representing improved performance characteristics within the fast recovery classification.

Parameter Comparison

Parameter	HER205G-TP (Micro Commercial Co)	SF26G (Taiwan Semiconductor)	SF26G A0G (Taiwan Semiconductor)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V
Current - Average Rectified (Io)	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A	1.3 V @ 2 A	1.3 V @ 2 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	50 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both SF26G and SF26G A0G are qualified substitutes for the HER205G-TP based on electrical parameter equivalence and mechanical compatibility. All three parts maintain Active product status and comply with ROHS3 and REACH regulatory requirements.

The SF26G and SF26G A0G variants demonstrate improved reverse recovery time performance (35 ns) compared to the HER205G-TP (50 ns), while maintaining identical voltage, current, and forward voltage specifications. The lower capacitance values (20 pF versus 50 pF) in the substitute parts represent a secondary performance advantage in high-frequency applications.

Selection between HER205G-TP and its substitutes should be based on availability, packaging preference (Tape & Reel versus Cut Tape), and inventory requirements rather than electrical performance differences, as all parts satisfy the specified application parameters.

Frequently Asked Questions (FAQ)

Q: Can SF26G and SF26G A0G be used interchangeably with HER205G-TP?

A: Yes. Both substitute parts meet all critical electrical specifications: 400 V reverse voltage rating, 2 A average rectified current, 1.3 V forward voltage at 2 A, and fast recovery classification. All three parts are housed in compatible through-hole DO-15 packages and operate across the same temperature range (-55°C to 150°C).

Q: What is the difference between SF26G and SF26G A0G?

A: Both parts are electrically identical and meet the same specifications. The designation difference reflects manufacturer part numbering conventions. Both are supplied by Taiwan Semiconductor Corporation and are available in Cut Tape packaging.

Q: Does the lower reverse recovery time in the substitute parts affect compatibility?

A: No. The substitute parts' reverse recovery time of 35 ns is superior to the HER205G-TP specification of 50 ns. Both values fall within the fast recovery classification (≤ 500ns, > 200mA). Lower reverse recovery time represents improved performance and does not create compatibility issues.

Q: Are there packaging differences between the main part and substitutes?

A: The HER205G-TP is supplied in Tape & Reel (TR) packaging, while SF26G and SF26G A0G are supplied in Cut Tape (CT) packaging. Both packaging formats contain identical through-hole DO-15 components suitable for the same circuit applications.

Q: Do all parts meet the same regulatory compliance standards?

A: Yes. HER205G-TP, SF26G, and SF26G A0G are all ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the capacitance difference between the main part and substitutes?

A: The HER205G-TP has 50 pF capacitance at 4V, 1MHz, while SF26G and SF26G A0G have 20 pF at the same conditions. The lower capacitance in substitute parts provides improved performance in high-frequency switching applications without affecting low-frequency circuit operation.

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