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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation HER604G

Name: HER604G
Brand: Taiwan Semiconductor Corporation
SKU: HER604G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER604G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: R-6, Axial

Datasheet:: HER604G.pdf

Description:: DIODE GEN PURP 300V 6A R-6

Quantity:: RFQ Add To RFQ list

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Inventory:6,444

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Product details

Overview

HER604G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 6 A average forward current and 300 V repetitive peak reverse voltage (V_RRM), with 1.0 V typical forward voltage at 6 A and 25°C junction temperature. It serves as a primary output rectifier in high-frequency switching power supplies and freewheeling diode in DC-DC converters.

For engineers reviewing the HER604G datasheet, HER604G pinout, HER604G application, or HER604G equivalent, key selection criteria include its 300 V V_RRM, 150 A non-repetitive surge rating, 50 ns reverse recovery time, R-6 axial package compatibility, and AEC-Q101 qualification option (HER604GH).

Technical Context

This device is a single-die, standard recovery rectifier optimized for high-frequency switching applications up to several hundred kHz. Its 50 ns reverse recovery time (trr) and low 1.0 V forward voltage reduce conduction and switching losses compared to general-purpose rectifiers.

The R-6 package provides robust thermal performance with 37 °C/W junction-to-ambient resistance, enabling reliable operation at full 6 A load with minimal heatsinking in ambient temperatures up to 75°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	300 V - Maximum reverse blocking voltage before breakdown; defines usable input/output voltage range in SMPS designs
I_F	6 A - Continuous average forward current at 25°C case; derates linearly above 25°C per curve in datasheet
V_F	1.0 V (typ) @ 6 A, 25°C - Low conduction loss enables higher efficiency in high-current output stages
I_FSM	150 A - Peak non-repetitive surge current capability; supports inrush and transient overload conditions
t_rr	50 ns - Fast reverse recovery minimizes switching losses and EMI in high-frequency converters
T_J max	+150 °C - Maximum junction temperature; allows operation in thermally constrained industrial environments
R_θJA	37 °C/W - Thermal resistance enables passive cooling in compact PCB layouts without forced air

Pinout & Package

HER604G uses the R-6 axial-leaded package with cathode indicated by a band on the body. Leads are pure tin-plated and solderable per J-STD-002. Polarity is unidirectional: anode and cathode terminals only.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit (e.g., transformer secondary center-tap or switch node)
Cathode	Forward current exit point	Connected to output rail or filter capacitor positive; marked with band for visual polarity identification

Key Features

Feature	Design Value
Glass passivated junction	Enhances moisture resistance and long-term reliability under humid or high-bias stress conditions
AEC-Q101 qualified variant available	HER604GH meets automotive-grade stress testing for under-hood and powertrain applications
Low VF (1.0 V typ)	Reduces power dissipation by ~0.6 W vs. 1.6 V diodes at 6 A, lowering thermal design burden
High I_FSM/I_F ratio (25×)	Supports 150 A surges without failure-critical for handling startup inrush in offline SMPS
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated end equipment

Applications

AC-DC Adapter Output Rectification	DC-DC Buck Converter Freewheeling Diode
Use Scenario: Secondary-side rectification in 36–48 V output, 60–100 W universal-input AC-DC adapters. IC Role / Device Role / Timing Role: Unidirectional current steering and voltage conversion; operates synchronously with PWM controller's switching frequency. Use Value: 1.0 V V_F reduces conduction loss by 30% vs. legacy 1.4 V rectifiers, improving adapter efficiency from 85% to 87.5% at full load.	Use Scenario: Freewheeling path in 12 V → 5 V/6 A buck converter for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during high-side MOSFET off-time; reverse recovery must be fast enough to avoid shoot-through. Use Value: 50 ns t_rr ensures clean commutation at 250 kHz switching, minimizing voltage spikes and EMI filtering requirements.
Switch-Mode Inverter Auxiliary Supply	Automotive HVAC Blower Power Stage
Use Scenario: Isolated auxiliary supply (15 V @ 1 A) derived from main inverter DC bus in solar string inverters. IC Role / Device Role / Timing Role: High-voltage rectifier stepping down 400–800 V DC bus to isolated low-voltage rail via flyback transformer. Use Value: 300 V V_RRM provides 2.5× safety margin over 120 V reflected voltage, ensuring robustness against voltage transients.	Use Scenario: Freewheeling diode in 12 V brushed DC motor driver for HVAC blower in passenger vehicles. IC Role / Device Role / Timing Role: Suppresses inductive kickback during PWM-controlled motor turn-off; must survive repeated 100 A surge events. Use Value: 150 A I_FSM rating exceeds ISO 7637-2 pulse 5a requirements, eliminating need for external TVS clamping.

AC-DC Adapter Output Rectification

DC-DC Buck Converter Freewheeling Diode

Use Scenario: Secondary-side rectification in 36–48 V output, 60–100 W universal-input AC-DC adapters.

IC Role / Device Role / Timing Role: Unidirectional current steering and voltage conversion; operates synchronously with PWM controller's switching frequency.

Use Value: 1.0 V V_F reduces conduction loss by 30% vs. legacy 1.4 V rectifiers, improving adapter efficiency from 85% to 87.5% at full load.

Use Scenario: Freewheeling path in 12 V → 5 V/6 A buck converter for industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation during high-side MOSFET off-time; reverse recovery must be fast enough to avoid shoot-through.

Use Value: 50 ns t_rr ensures clean commutation at 250 kHz switching, minimizing voltage spikes and EMI filtering requirements.

Switch-Mode Inverter Auxiliary Supply

Automotive HVAC Blower Power Stage

Use Scenario: Isolated auxiliary supply (15 V @ 1 A) derived from main inverter DC bus in solar string inverters.

IC Role / Device Role / Timing Role: High-voltage rectifier stepping down 400–800 V DC bus to isolated low-voltage rail via flyback transformer.

Use Value: 300 V V_RRM provides 2.5× safety margin over 120 V reflected voltage, ensuring robustness against voltage transients.

Use Scenario: Freewheeling diode in 12 V brushed DC motor driver for HVAC blower in passenger vehicles.

IC Role / Device Role / Timing Role: Suppresses inductive kickback during PWM-controlled motor turn-off; must survive repeated 100 A surge events.

Use Value: 150 A I_FSM rating exceeds ISO 7637-2 pulse 5a requirements, eliminating need for external TVS clamping.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-efficiency rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH6L06D	6 A / 600 V, 1.7 V V_F (typ), 60 ns t_rr, TO-220AC package	Higher V_RRM but higher VF and larger footprint; requires heatsink above 3 A	Select when >400 V blocking is required and board space permits TO-220 mounting
ES3D	3 A / 200 V, 0.95 V V_F, 35 ns t_rr, SMA package	Lower current/voltage rating; surface-mount; unsuitable for 6 A continuous loads	Select for space-constrained, lower-power (<15 W) applications where ultra-fast recovery is prioritized

Compared with STTH6L06D and ES3D, HER604G offers optimal balance of 6 A current handling, 300 V blocking, 1.0 V low VF, and axial R-6 package for through-hole manufacturing-making it ideal for cost-sensitive, medium-power industrial SMPS where thermal and layout constraints favor leaded devices.

Availability

HER604G is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC buck converters, and switch-mode inverter auxiliary supplies requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for HER604G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in rectifiers, TVS diodes, MOSFETs, and bipolar transistors since 1979.

The HER601G–HER606G family was designed specifically for high-efficiency, high-reliability rectification in industrial and automotive-grade switching power supplies-emphasizing low VF, fast trr, and rugged packaging.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for HER604G?

The HER604G has a V_RRM of 300 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2104). This value is fixed per part number and distinct from other members of the HER60xG series-HER603G is 200 V, HER605G is 400 V. Designers must ensure applied reverse voltage remains below 300 V with appropriate safety margin.

Is HER604G suitable for automotive applications?

Yes-the HER604GH variant is AEC-Q101 qualified and approved for automotive use. The standard HER604G is not AEC-Q101 certified, but shares identical electrical and thermal specifications. For automotive designs, specify HER604GH to ensure compliance with stress testing requirements for temperature cycling, humidity, and mechanical shock.

What is the forward voltage (V_F) of HER604G at rated current?

The HER604G exhibits a typical forward voltage of 1.0 V at 6 A and 25°C junction temperature, per the Electrical Specifications table. This value increases to approximately 1.15 V at 125°C. The low V_F directly reduces conduction losses, making HER604G more efficient than general-purpose rectifiers with V_F ≥ 1.3 V at the same current.

Does HER604G have a specified reverse recovery time (t_rr)?

Yes-HER604G has a maximum reverse recovery time of 50 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A. This fast recovery characteristic is critical for minimizing switching losses and EMI in high-frequency converters operating above 100 kHz, distinguishing it from slower general-purpose rectifiers (t_rr > 2 µs).

What package type does HER604G use, and what are its key mechanical features?

HER604G uses the R-6 axial-leaded package with pure tin-plated leads compliant with J-STD-002 solderability standards. The molding compound meets UL 94V-0 flammability rating, and the device passes JESD 201 Class 2 whisker testing. Polarity is marked by a cathode band, and typical weight is 1.65 g.

HER604G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: R-6, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 300 V

Current - Average Rectified (Io):: 6A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 6 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 300 V

Capacitance @ Vr, F:: 80pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: R-6

Operating Temperature - Junction:: -55°C ~ 150°C

HER604G FAQ

1.How can I place an order for HER604G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER604G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for HER604G reliable?

The price and inventory of HER604G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER604G is usually 5 days.

3.What payment methods are accepted for HER604G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER604G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER604G?

HER604G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER604G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for HER604G?

For technical support, including HER604G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER604G requirements.

6.How does Aetrix verify that HER604G is sourced from the original manufacturer or authorized distributors?

All HER604G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HER604G meets industry standards.

7.What is the process for return or replacement of HER604G?

All HER604G units undergo pre-shipment inspection (PSI). If there is an issue with HER604G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The HER604G part is unused and in its original packaging.

Return procedure for HER604G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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