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

Taiwan Semiconductor Corporation HER302G R0G

Name: HER302G R0G
Brand: Taiwan Semiconductor Corporation
SKU: HER302G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER302G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: HER302G R0G.pdf

Description:: DIODE GEN PURP 100V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:2,211

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Product details

Overview

HER302G from Taiwan Semiconductor is a high-efficiency, AEC-Q101-qualified ultrafast recovery rectifier diode in DO-201AD package, rated for 3A average forward current, 100V repetitive peak reverse voltage (V_RRM), and 125A non-repetitive surge current (I_FSM). It delivers 1.0V typical forward voltage at 3A/25°C and 50ns reverse recovery time, optimized for DC-DC converters and switching-mode power supplies.

For engineers reviewing the HER302G datasheet, HER302G pinout, HER302G application, or HER302G equivalent, key selection criteria include its 100V V_RRM, ultrafast 50ns t_rr, low 1.0V V_F at rated current, DO-201AD thermal performance (R_θJL = 10°C/W), and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

This single-die, planar passivated silicon rectifier uses an ultrafast recovery structure to minimize switching losses in high-frequency power conversion. Its 50ns reverse recovery time (t_rr) and low junction capacitance (60pF at 4V) support operation up to several hundred kHz in SMPS topologies.

The device operates across –55°C to +150°C junction temperature range with 10°C/W junction-to-lead thermal resistance, enabling stable conduction under sustained 3A load in constrained thermal environments. Cathode band polarity marking ensures unambiguous PCB layout integration.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum reverse blocking voltage before breakdown; defines usable input voltage range in flyback or boost stages
I_F	3 A - Continuous average forward current rating; determines heatsink sizing and duty-cycle limits in steady-state operation
t_rr	50 ns - Ultrafast reverse recovery time; reduces switching loss and EMI in >100 kHz converters
V_F	1.0 V (typ @ 3A, 25°C) - Low forward drop improves efficiency and reduces thermal stress vs. standard rectifiers
I_FSM	125 A - Peak non-repetitive surge current capability; withstands inrush and transient overloads without failure
R_θJL	10 °C/W - Junction-to-lead thermal resistance; enables direct thermal coupling to PCB copper or heatsink via lead frame

Pinout & Package

DO-201AD axial-leaded package with cathode indicated by a painted band on the body; leads are pure tin-plated per J-STD-002, RoHS-compliant, and halogen-free per IEC 61249-2-21.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connects to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap)
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connects to output rail or filter capacitor; blocks reverse voltage up to 100V during off-state

Key Features

Feature	Design Value
Ultrafast recovery (50 ns)	Reduces switching loss and diode-induced ringing in high-frequency SMPS, improving efficiency above 200 kHz
AEC-Q101 qualified	Validated for automotive powertrain and chassis applications requiring extended temperature cycling and mechanical robustness
Low V_F (1.0 V typ)	Lowers conduction loss by ~15% vs. standard FR302, directly reducing thermal design margin requirements
DO-201AD package	Enables manual or automated through-hole assembly with proven thermal path to PCB copper and mechanical stability

Applications

DC–DC Converters	Switching Mode Inverters
Use Scenario: Secondary-side rectification in isolated 12V–48V output DC–DC converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 50ns t_rr minimizes reverse recovery charge loss, while 1.0V V_F maintains >92% efficiency at full 3A load.	Use Scenario: Freewheeling path in H-bridge motor drive inverters for HVAC blowers and power steering pumps. IC Role / Device Role / Timing Role: Clamp diode providing low-loss current recirculation during PWM dead-time intervals. Use Value: 125A I_FSM handles motor back-EMF surges; 100V V_RRM matches 48V bus systems with safety margin.
Automotive Onboard Chargers	Industrial SMPS Power Supplies
Use Scenario: Input bridge rectification in bidirectional OBC AC/DC stage with PFC front-end. IC Role / Device Role / Timing Role: High-reliability rectifier in high-temperature engine bay environments. Use Value: AEC-Q101 qualification and –55°C to +150°C T_J rating ensure functional integrity across automotive thermal cycles.	Use Scenario: Output rectification in 24V/3A industrial DIN-rail power supplies with forced-air cooling. IC Role / Device Role / Timing Role: Primary output diode delivering stable DC to PLC I/O modules and sensors. Use Value: DO-201AD package provides mechanical ruggedness and 10°C/W R_θJL for predictable thermal management on standard FR4 PCBs.

DC–DC Converters

Switching Mode Inverters

Use Scenario: Secondary-side rectification in isolated 12V–48V output DC–DC converters operating at 200–500 kHz.

IC Role / Device Role / Timing Role: Output rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 50ns t_rr minimizes reverse recovery charge loss, while 1.0V V_F maintains >92% efficiency at full 3A load.

Use Scenario: Freewheeling path in H-bridge motor drive inverters for HVAC blowers and power steering pumps.

IC Role / Device Role / Timing Role: Clamp diode providing low-loss current recirculation during PWM dead-time intervals.

Use Value: 125A I_FSM handles motor back-EMF surges; 100V V_RRM matches 48V bus systems with safety margin.

Automotive Onboard Chargers

Industrial SMPS Power Supplies

Use Scenario: Input bridge rectification in bidirectional OBC AC/DC stage with PFC front-end.

IC Role / Device Role / Timing Role: High-reliability rectifier in high-temperature engine bay environments.

Use Value: AEC-Q101 qualification and –55°C to +150°C T_J rating ensure functional integrity across automotive thermal cycles.

Use Scenario: Output rectification in 24V/3A industrial DIN-rail power supplies with forced-air cooling.

IC Role / Device Role / Timing Role: Primary output diode delivering stable DC to PLC I/O modules and sensors.

Use Value: DO-201AD package provides mechanical ruggedness and 10°C/W R_θJL for predictable thermal management on standard FR4 PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	600V V_RRM, 3A I_F, 65ns t_rr, TO-220AC package	Higher voltage rating but slower recovery and larger footprint; requires heatsink mounting	Select when >100V blocking or higher surge immunity is required; not drop-in due to package and pinout mismatch
ON Semi MUR305E	50V V_RRM, 3A I_F, 50ns t_rr, DO-201AD package	Lower voltage rating; identical form factor and thermal profile	Use where 50V system margin suffices and cost sensitivity favors legacy MUR series sourcing

Compared with STTH3L06S and MUR305E, HER302G uniquely balances 100V blocking, 50ns speed, DO-201AD compatibility, and AEC-Q101 qualification-making it optimal for automotive 48V DC–DC and industrial 24V/48V SMPS where reliability, size, and thermal performance intersect.

Availability

HER302G is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and automotive onboard chargers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for HER302G 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 power rectifiers, TVS devices, and MOSFETs for industrial and automotive markets.

The HER30xG family was designed specifically for high-efficiency, high-reliability rectification in automotive-grade and industrial switching power supplies-emphasizing ultrafast recovery, low forward voltage, and AEC-Q101 compliance.

FAQ

What is the maximum junction temperature rating for HER302G?

The HER302G has a maximum junction temperature (T_J) of +150°C and a minimum of –55°C. This wide operating range supports deployment in under-hood automotive environments and industrial enclosures without active cooling. Thermal derating begins above 75°C ambient, per the forward current derating curve in the official datasheet.

Is HER302G pin-compatible with other DO-201AD rectifiers like HER301G or HER303G?

Yes, HER302G shares identical DO-201AD mechanical dimensions, lead spacing, and cathode band polarity with HER301G through HER308G. All variants use the same pinout: anode at unbanded end, cathode at banded end. Substitution is mechanically seamless, though voltage and recovery characteristics differ across the family.

Does HER302G meet automotive qualification standards?

Yes, HER302G is AEC-Q101 qualified-verified per stress test conditions including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. This qualification confirms suitability for automotive power electronics where reliability under thermal and mechanical stress is critical.

What is the typical reverse recovery time (t_rr) of HER302G and how is it measured?

The HER302G exhibits a typical reverse recovery time (t_rr) of 50 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value is confirmed in the Electrical Specifications table and supports high-frequency switching in DC–DC converters up to 500 kHz with minimal switching loss.

Can HER302G be used in surface-mount designs?

No, HER302G is exclusively offered in the through-hole DO-201AD package and is not available in SMD variants. For surface-mount alternatives with similar electrical specs, consider the SMA封装 equivalents such as SMA302 or SMB302-but note these differ in thermal resistance, surge rating, and qualification status versus HER302G.

HER302G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 3 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 100 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

HER302G R0G FAQ

1.How can I place an order for HER302G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER302G R0G 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 HER302G R0G reliable?

The price and inventory of HER302G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER302G R0G is usually 5 days.

3.What payment methods are accepted for HER302G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER302G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER302G R0G?

HER302G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER302G R0G 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 HER302G R0G?

For technical support, including HER302G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER302G R0G requirements.

6.How does Aetrix verify that HER302G R0G is sourced from the original manufacturer or authorized distributors?

All HER302G R0G 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 HER302G R0G meets industry standards.

7.What is the process for return or replacement of HER302G R0G?

All HER302G R0G units undergo pre-shipment inspection (PSI). If there is an issue with HER302G R0G, 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 HER302G R0G part is unused and in its original packaging.

Return procedure for HER302G R0G:

1.Submit a request within 90 days.

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

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