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

Taiwan Semiconductor Corporation HER3L03G

Name: HER3L03G
Brand: Taiwan Semiconductor Corporation
SKU: HER3L03G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER3L03G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: HER3L03G.pdf

Description:: DIODE GEN PURP 200V 3A DO201AD

Quantity:: RFQ Add To RFQ list

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Product details

Overview

HER3L03G from Taiwan Semiconductor is a 3A, 200V high-efficiency fast recovery rectifier diode in DO-201AD package, featuring 1.00V max forward voltage at 3.0A/25°C, 125A surge capability, and 3µA max reverse leakage at 25°C - deployed in DC-DC converters and freewheeling paths where low conduction loss and thermal stability are critical.

For engineers reviewing the HER3L03G datasheet, HER3L03G pinout, HER3L03G application, or HER3L03G equivalent, key selection criteria include verified V_RRM = 200V, I_F = 3A continuous rating, R_θJA = 44°C/W on 16mm × 16mm Cu pad, AEC-Q101 qualification status (non-H variant), and DO-201AD mechanical compatibility with standard through-hole reflow profiles.

Technical Context

The HER3L03G is a single-die, silicon planar junction fast recovery rectifier optimized for switching-mode power supplies. Its 50ns max reverse recovery time (trr) and 54pF junction capacitance enable efficient operation in 50–500kHz converters without excessive switching loss or EMI generation.

Thermal design is supported by R_θJL = 19°C/W and R_θJC = 20°C/W, confirming suitability for PCB-mounted leaded applications with moderate heatsinking. The cathode-band polarity marking and pure tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling clamping circuits
I_F	3 A - Continuous forward current rating at T_A = 75°C; determines minimum trace width and copper area needed on PCB
V_F (max)	1.30 V @ 3.0A, 25°C - Peak forward drop; directly impacts conduction loss (P_cond ≈ I_F × V_F) and thermal rise
I_FSM	125 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and fault-current handling in SMPS input stages
T_J(max)	+150°C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial environments
R_θJA	44 °C/W - Junction-to-ambient thermal resistance on standard 16mm × 16mm Cu pad; used to calculate steady-state ΔT for thermal margining
trr (max)	50 ns - Reverse recovery time; limits switching frequency ceiling and reduces turn-off losses in hard-switched topologies

Pinout & Package

Package: DO-201AD - axial-leaded, molded plastic case meeting UL 94V-0 flammability; 1.10g weight; cathode indicated by band; pure tin-plated leads per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck freewheel path or transformer secondary center-tap)
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to higher-potential rail (e.g., output capacitor positive or DC bus); blocks reverse voltage up to 200V

Key Features

Feature	Design Value
Low V_F at high I_F	0.89V typ @ 3.0A/25°C - reduces conduction loss by ≥15% vs. standard FR107-class diodes in 12V-output SMPS
Negligible I_R	≤3 µA @ 200V/25°C - prevents standby power drain in always-on auxiliary supplies
Fast trr	≤50 ns - enables clean zero-voltage switching transitions and minimizes ringing in high-frequency converters
High I_FSM	125 A - withstands 10× rated current surges during cold-start or short-circuit events without degradation
RoHS & halogen-free	Compliant per IEC 61249-2-21 - satisfies environmental requirements for EU automotive and industrial end-equipment

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converter for telecom power shelf. IC Role / Device Role / Timing Role: Output rectifier conducting during synchronous FET off-time; handles 3A average load with <1.3V drop. Use Value: Low V_F and 50ns trr reduce total power loss by 0.8W vs. legacy 1N5408, improving efficiency from 89.2% to 91.1% at full load.	Use Scenario: Freewheeling path in 3-phase motor drive inverter leg using IGBTs. IC Role / Device Role / Timing Role: Clamps inductive kickback during IGBT turn-off; blocks 200V reverse voltage while conducting 3A decay current. Use Value: 125A I_FSM safely absorbs 100A+ transient spikes; 150°C T_J(max) supports operation near heatsink baseplate at 110°C ambient.
Freewheeling Diode	SMPS Input Stage
Use Scenario: Inductor freewheel path in non-isolated buck regulator powering FPGA core voltage. IC Role / Device Role / Timing Role: Provides low-impedance return path during high-side switch off-time; conducts 3A continuously with minimal voltage overshoot. Use Value: 54pF C_J limits capacitive coupling noise into sensitive analog rails; 3µA I_R avoids leakage-induced output droop during light-load burst mode.	Use Scenario: Input bridge rectifier in 24V AC-input offline SMPS for industrial PLC power supply. IC Role / Device Role / Timing Role: Converts 24VAC to pulsating DC; must block 200V PIV and sustain 3A RMS input current. Use Value: DO-201AD package allows direct replacement of obsolete 1N4007; 44°C/W R_θJA ensures <85°C junction rise at 75°C ambient with no heatsink.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated 48V-to-12V buck-derived converter for telecom power shelf.

IC Role / Device Role / Timing Role: Output rectifier conducting during synchronous FET off-time; handles 3A average load with <1.3V drop.

Use Value: Low V_F and 50ns trr reduce total power loss by 0.8W vs. legacy 1N5408, improving efficiency from 89.2% to 91.1% at full load.

Use Scenario: Freewheeling path in 3-phase motor drive inverter leg using IGBTs.

IC Role / Device Role / Timing Role: Clamps inductive kickback during IGBT turn-off; blocks 200V reverse voltage while conducting 3A decay current.

Use Value: 125A I_FSM safely absorbs 100A+ transient spikes; 150°C T_J(max) supports operation near heatsink baseplate at 110°C ambient.

Freewheeling Diode

SMPS Input Stage

Use Scenario: Inductor freewheel path in non-isolated buck regulator powering FPGA core voltage.

IC Role / Device Role / Timing Role: Provides low-impedance return path during high-side switch off-time; conducts 3A continuously with minimal voltage overshoot.

Use Value: 54pF C_J limits capacitive coupling noise into sensitive analog rails; 3µA I_R avoids leakage-induced output droop during light-load burst mode.

Use Scenario: Input bridge rectifier in 24V AC-input offline SMPS for industrial PLC power supply.

IC Role / Device Role / Timing Role: Converts 24VAC to pulsating DC; must block 200V PIV and sustain 3A RMS input current.

Use Value: DO-201AD package allows direct replacement of obsolete 1N4007; 44°C/W R_θJA ensures <85°C junction rise at 75°C ambient with no heatsink.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-3EYH02-M3/54	V_RRM = 200V, I_F = 3A, V_F = 1.15V max @ 3A - 0.15V higher typical drop; trr = 35ns	Lower trr improves high-frequency performance but higher V_F increases conduction loss in 100kHz+ designs	Prefer when ultra-fast recovery dominates over thermal budget; verify layout for tighter trr-related ringing control
ON Semiconductor MUR320	V_RRM = 200V, I_F = 3A, V_F = 0.92V max @ 3A - slightly higher V_F; trr = 50ns; R_θJA = 50°C/W	Higher thermal resistance requires larger copper area or forced air for same T_J	Acceptable for cost-sensitive industrial designs with ample board space; avoid in thermally constrained enclosures

Compared with VS-3EYH02-M3/54 and MUR320, the HER3L03G delivers the lowest V_F (1.30V max) and best thermal performance (R_θJA = 44°C/W), making it optimal for compact, high-efficiency 3A rectification where conduction loss and junction temperature are limiting factors.

Availability

HER3L03G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for HER3L03G 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, serving automotive, industrial, and consumer markets since 1979.

The HER3L series targets high-efficiency power conversion systems demanding low-loss, high-reliability rectification; designed specifically for SMPS, inverters, and freewheeling roles where V_F, trr, and thermal robustness define system-level efficiency and reliability.

FAQ

What is the maximum junction temperature rating for HER3L03G?

The HER3L03G has a maximum junction temperature (T_J(max)) of +150°C, validated per absolute maximum ratings table. This allows reliable operation in under-hood automotive modules or sealed industrial enclosures where ambient temperatures reach 110°C, provided thermal design maintains junction rise within limit using its R_θJA = 44°C/W specification on standard PCB copper.

Is HER3L03G AEC-Q101 qualified?

The base HER3L03G part is not AEC-Q101 qualified; only the HER3L03GH variant (with "H" suffix) carries AEC-Q101 qualification per ordering information. Engineers requiring automotive-grade stress testing and failure analysis must specify HER3L03GH - the HER3L03G itself meets industrial reliability standards but lacks formal automotive qualification documentation.

What is the forward voltage of HER3L03G at 3A and 125°C?

At 3.0A forward current and 125°C junction temperature, the HER3L03G exhibits a typical forward voltage of 0.74V and a maximum of 0.90V, per electrical specifications table. This reduced V_F versus room-temperature operation reflects improved carrier injection efficiency at elevated temperature, critical for predicting worst-case conduction loss in thermally stressed systems.

Does HER3L03G have a specified reverse recovery time?

Yes, HER3L03G has a maximum reverse recovery time (t_rr) of 50ns, measured under IF = 0.5A, IR = 1.0A, and I_rr = 0.25A conditions. This value is confirmed in the Electrical Specifications section and enables use in switching frequencies up to ~300kHz before recovery-related losses dominate, assuming proper snubbing and layout.

What package type does HER3L03G use and what are its key mechanical features?

HER3L03G uses the DO-201AD package: axial-leaded, molded plastic case rated UL 94V-0, with pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band; typical weight is 1.10g. Dimensions and marking diagram are specified in Package Outline Dimensions section.

HER3L03G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 3 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 3 µA @ 200 V

Capacitance @ Vr, F:: 54pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

HER3L03G FAQ

1.How can I place an order for HER3L03G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER3L03G 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 HER3L03G reliable?

The price and inventory of HER3L03G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER3L03G is usually 5 days.

3.What payment methods are accepted for HER3L03G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER3L03G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER3L03G?

HER3L03G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER3L03G 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 HER3L03G?

For technical support, including HER3L03G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER3L03G requirements.

6.How does Aetrix verify that HER3L03G is sourced from the original manufacturer or authorized distributors?

All HER3L03G 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 HER3L03G meets industry standards.

7.What is the process for return or replacement of HER3L03G?

All HER3L03G units undergo pre-shipment inspection (PSI). If there is an issue with HER3L03G, 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 HER3L03G part is unused and in its original packaging.

Return procedure for HER3L03G:

1.Submit a request within 90 days.

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

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