HER301G Equivalent & Substitute Parts

Part Overview

The HER301G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as a fast recovery diode with a reverse recovery time of 50 ns, suitable for standard rectification applications requiring moderate voltage and current ratings. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and inventory optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

HER301G

Taiwan Semiconductor CorporationIn Stock: 745HER301G Datasheet

Current PartRFQ

UF5400-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 4677UF5400-E3/54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HER301G are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion requires identical or superior ratings across the following key parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 3 A minimum
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 3 A maximum
• Reverse Recovery Time (trr): 50 ns maximum
• Current - Reverse Leakage @ Vr: 10 µA @ 50 V maximum
• Package / Case: DO-201AD, Axial (mechanical compatibility)
• Mounting Type: Through Hole (board assembly compatibility)
• Operating Temperature - Junction: -55°C to 150°C minimum range
• Technology: Standard (functional classification)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

The UF5400-E3/54 meets all specified electrical parameters and maintains identical package, mounting, temperature range, and compliance certifications, establishing it as a parametric equivalent for the HER301G.

Parameter Comparison

Engineering Selection Recommendations

The UF5400-E3/54 manufactured by Vishay General Semiconductor - Diodes Division is a direct parametric equivalent to the HER301G. Both components maintain Active product status and satisfy identical electrical specifications across all critical rectification parameters. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

The UF5400-E3/54 exhibits lower junction capacitance (45 pF versus 60 pF at 4V, 1MHz), which may provide marginal performance advantages in high-frequency switching applications, though this parameter difference does not affect standard rectification functionality. Both components are supplied in DO-201AD axial through-hole packages, ensuring direct mechanical and electrical interchangeability on printed circuit boards without layout modification.

Selection between HER301G and UF5400-E3/54 may be determined by supplier availability, lead time, packaging format preference (bulk versus cut tape), or inventory management requirements. Both parts are suitable for applications requiring 50 V, 3 A fast recovery rectification with standard silicon diode technology.

Frequently Asked Questions (FAQ)

Q: Can the UF5400-E3/54 be used as a direct replacement for the HER301G in existing designs?

A: Yes. The UF5400-E3/54 is a parametric equivalent with identical electrical ratings (50 V, 3 A, 50 ns reverse recovery time) and identical DO-201AD axial through-hole package. No circuit modification or board redesign is required for substitution.

Q: What is the difference in capacitance between these two parts?

A: The HER301G has a junction capacitance of 60 pF at 4V, 1MHz, while the UF5400-E3/54 has 45 pF at the same conditions. This difference does not affect standard rectification applications and may provide marginal benefits in high-frequency circuits.

Q: Are both parts RoHS compliant?

A: Yes. Both the HER301G and UF5400-E3/54 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component procurement.

Q: What is the operating temperature range for both parts?

A: Both components operate across a junction temperature range of -55°C to 150°C, providing identical thermal performance specifications.

Q: Do these parts have the same forward voltage drop?

A: Yes. Both the HER301G and UF5400-E3/54 have a maximum forward voltage of 1 V at 3 A forward current, ensuring identical voltage drop characteristics in rectification circuits.

Q: What is the reverse leakage current specification?

A: Both parts specify a maximum reverse leakage current of 10 µA at 50 V reverse bias, indicating identical leakage performance.

Q: Are there packaging format differences between these parts?

A: The HER301G is supplied in standard packaging format, while the UF5400-E3/54 is available in cut tape (CT) format. Both use the DO-201AD axial through-hole package. Packaging format selection depends on assembly process requirements and inventory management preferences.

Q: What is the reverse recovery time for these diodes?

A: Both the HER301G and UF5400-E3/54 have a reverse recovery time of 50 ns, classifying them as fast recovery diodes suitable for switching applications requiring rapid diode turn-off characteristics.