My Inquiry
My Account
Taiwan Semiconductor Corporation HER303G-K
- Part No.:
- HER303G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
HER303G-K.pdf
- Description:
- 50NS, 3A, 200V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:9,942
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HER303G-K from Taiwan Semiconductor is a high-efficiency, single-die, ultra-fast recovery rectifier diode in DO-201AD package, rated for 3 A average forward current, 200 V repetitive peak reverse voltage (VRRM), and 125 A non-repetitive surge current (IFSM). It delivers 1.0 V typical forward voltage at 3 A and 25°C, with 50 ns reverse recovery time, suited for switching-mode power supplies and freewheeling paths in DC-DC converters.
For engineers reviewing the HER303G-K datasheet, HER303G-K pinout, HER303G-K application, or HER303G-K equivalent, key selection criteria include VRRM = 200 V, VF ≤ 1.0 V @ 3 A, trr = 50 ns, RθJA = 35 °C/W, and DO-201AD mechanical compatibility in high-frequency, medium-power rectification designs.
Technical Context
This device operates as a unidirectional, silicon planar junction rectifier optimized for fast switching performance. Its 50 ns reverse recovery time and low junction capacitance (60 pF @ 4 V) minimize switching losses in high-frequency converters up to several hundred kHz.
The DO-201AD package provides robust thermal performance (RθJL = 10 °C/W) and meets UL 94V-0 flammability rating, with pure tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines safe operating range in flyback/freewheeling circuits |
| IF(AV) | 3 A - Continuous average forward current; determines heatsink sizing and conduction loss budget |
| VF @ 3 A | 1.0 V typ - Forward voltage drop at rated current; directly impacts conduction loss (Pcond ≈ IF × VF) |
| trr | 50 ns - Reverse recovery time; limits maximum switching frequency and reduces turn-off switching loss |
| IFSM | 125 A - Non-repetitive surge current capability; supports inrush and transient overload tolerance |
| RθJA | 35 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under given power dissipation |
| CJ @ 4 V | 60 pF - Junction capacitance at 4 V reverse bias; affects high-frequency noise coupling and snubber design |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; two-terminal configuration (Anode and Cathode); lead finish: pure tin, J-STD-002 compliant; weight ≈ 1.10 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of load or switch node in freewheeling path |
| Cathode | Forward current exit point; marked by band | Connected to higher-potential rail (e.g., output capacitor positive or switch drain) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery | trr = 50 ns enables operation in 100–500 kHz SMPS without excessive switching loss |
| Low forward voltage | VF ≤ 1.0 V @ 3 A reduces conduction loss by ~15% vs. standard rectifiers at same current |
| High surge robustness | IFSM = 125 A withstands repeated startup surges in industrial DC-DC modules |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS; suitable for green manufacturing and export compliance |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V output buck-derived topologies. IC Role / Device Role / Timing Role: High-efficiency synchronous or quasi-resonant rectifier replacing Schottky diodes where higher VRRM is required. Use Value: 200 V VRRM and 50 ns trr allow stable operation at 250 kHz with <1.0 V VF, reducing thermal stress on PCB layout. | Use Scenario: Freewheeling path in H-bridge motor drive inverters for HVAC blowers and pumps. IC Role / Device Role / Timing Role: Unidirectional current clamp during inductive kickback events. Use Value: 125 A IFSM handles peak back-EMF transients without degradation; DO-201AD mounting supports mechanical reliability under vibration. |
| AC-DC Adapters | Industrial Power Supplies |
Use Scenario: Output rectification in compact 36 W laptop adapters with universal AC input. IC Role / Device Role / Timing Role: Primary secondary-side rectifier in flyback topology. Use Value: 1.0 V VF minimizes conduction loss at 3 A load, improving efficiency over 87% at full load per DOE VI. | Use Scenario: Input bridge or output stage rectification in 12 V/5 A programmable bench supplies. IC Role / Device Role / Timing Role: Medium-current, medium-voltage discrete rectifier with proven long-term reliability. Use Value: -55°C to +150°C TJ range and JESD 201 Class 1A whisker resistance ensure field stability in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L02S | VRRM = 200 V, VF = 0.95 V @ 3 A, trr = 35 ns, SOD-123FL package | Surface-mount, lower profile; requires reflow-compatible layout and lacks axial lead mechanical retention | Preferred for space-constrained PCBs where automated assembly and footprint reduction outweigh axial-mount advantages |
| VS-3EYH02-M3/54 | VRRM = 200 V, VF = 1.05 V @ 3 A, trr = 55 ns, DO-201AD package | Identical package and polarity marking; slightly higher VF and longer trr than HER303G-K | Drop-in replacement where minor efficiency trade-off is acceptable and second-source qualification is required |
Compared with STTH3L02S and VS-3EYH02-M3/54, the HER303G-K offers optimal balance of axial-mount robustness, 50 ns trr, and 1.0 V VF in DO-201AD-making it preferred for industrial power supplies requiring field-serviceable through-hole assembly and thermal margin.
Availability
HER303G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant discrete rectification.
Supply support for HER303G-K 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 diodes, and MOSFETs since 1979.
The HER30xG-K series was designed specifically for high-efficiency, medium-power switching power conversion-targeting cost-sensitive yet thermally demanding applications in consumer, industrial, and telecom power systems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for HER303G-K?
The HER303G-K has a VRRM rating of 200 V, meaning it can reliably block up to 200 V of reverse voltage in repetitive operation without breakdown. This value is specified in the Absolute Maximum Ratings table and is critical for selecting appropriate derating margins in flyback or forward converter designs where voltage spikes may exceed nominal output levels.
What is the forward voltage drop of HER303G-K at 3 A and 25°C?
The HER303G-K exhibits a typical forward voltage (VF) of 1.0 V at 3 A and 25°C junction temperature, as confirmed in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline used to calculate thermal rise and efficiency in continuous-duty applications.
Does HER303G-K have a defined reverse recovery time (trr)?
Yes, the HER303G-K has a maximum reverse recovery time (trr) of 50 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultra-fast recovery characteristic is essential for minimizing switching losses in high-frequency DC-DC converters and ensures compatibility with PWM controllers operating above 100 kHz.
Is HER303G-K RoHS and halogen-free compliant?
Yes, the HER303G-K is RoHS compliant and halogen-free per IEC 61249-2-21. The "G" suffix in the part number explicitly denotes green compound molding, and the device uses pure tin-plated leads meeting J-STD-002 solderability requirements-ensuring environmental compliance and process compatibility for lead-free reflow and wave soldering.
What package type does HER303G-K use, and what are its key mechanical attributes?
The HER303G-K uses the DO-201AD axial-leaded package, featuring UL 94V-0 rated molding compound, cathode band polarity marking, and pure tin-plated leads. Its weight is approximately 1.10 g, and it passes JESD 201 Class 1A whisker testing-making it suitable for high-reliability, vibration-prone industrial environments.
HER303G-K 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 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 200 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
HER303G-K FAQ
1.How can I place an order for HER303G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER303G-K 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 HER303G-K reliable?
The price and inventory of HER303G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER303G-K is usually 5 days.
3.What payment methods are accepted for HER303G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER303G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER303G-K?
HER303G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER303G-K 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 HER303G-K?
For technical support, including HER303G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER303G-K requirements.
6.How does Aetrix verify that HER303G-K is sourced from the original manufacturer or authorized distributors?
All HER303G-K 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 HER303G-K meets industry standards.
7.What is the process for return or replacement of HER303G-K?
All HER303G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER303G-K, 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 HER303G-K part is unused and in its original packaging.
Return procedure for HER303G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HER303G-K Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
