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

Taiwan Semiconductor Corporation HER208G-K

Name: HER208G-K
Brand: Taiwan Semiconductor Corporation
SKU: HER208G-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER208G-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: HER208G-K.pdf

Description:: 75NS, 2A, 1000V, HIGH EFFICIENT

Quantity:: RFQ Add To RFQ list

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Inventory:7,543

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Product details

Overview

HER208G-K from Taiwan Semiconductor is a 1000 V, 2 A high-efficiency ultrafast recovery rectifier diode in DO-204AC (DO-15) package, featuring 75 ns reverse recovery time, 1.7 V max forward voltage at 2 A, and 60 A surge capability - deployed in switching-mode power supplies and DC-DC converters requiring high-voltage blocking and low conduction loss.

For engineers reviewing the HER208G-K datasheet, HER208G-K pinout, HER208G-K application, or HER208G-K equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward current rating (2 A), thermal resistance (60 °C/W), and ultrafast recovery performance (75 ns trr) in compact DO-15 through-hole packaging.

Technical Context

This device implements a single-die, glass-passivated PN junction optimized for high-voltage rectification with low forward voltage drop and controlled reverse recovery behavior. Its 1000 V V_RRM and 75 ns t_rr enable efficient operation in high-frequency SMPS topologies where voltage margin and switching loss are critical.

The HER208G-K operates across -55 °C to +150 °C junction temperature range, exhibits 5 µA max reverse leakage at 25 °C, and delivers stable performance under 8.3 ms half-sine surge conditions up to 60 A - supporting robust freewheeling and output rectification in industrial and telecom power stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports primary-side rectification in 800–1000 V DC bus applications without derating
I_F	2 A continuous - suitable for medium-power output stages in 20–60 W SMPS designs
t_rr	75 ns - reduces switching losses and EMI in 50–500 kHz converters
V_F (max)	1.7 V @ 2 A, 25 °C - lowers conduction loss vs. standard fast recovery diodes
I_FSM	60 A - withstands transient surges during startup or overload in offline converters
R_θJA	60 °C/W - enables natural-convection cooling on standard FR-4 PCBs with minimal copper area
C_J	20 pF @ 1 MHz, 4 V - limits capacitive coupling noise in high-dv/dt environments

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, glass-passivated, RoHS-compliant, halogen-free molding compound (UL 94V-0), cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node)
Cathode	Current exit point during forward conduction; reverse-blocking terminal	Marked with band; tied to output rail or filter capacitor positive in flyback/forward converters

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term reliability and moisture resistance in humid or thermally cycling environments
Ultrafast recovery (75 ns)	Reduces turn-off loss and improves efficiency in high-frequency (>100 kHz) switching topologies
Low V_F (1.7 V max)	Minimizes I²R heating at full load, enabling smaller heatsinking or higher ambient operation
60 A I_FSM	Provides margin against line surges, inrush currents, and fault transients without failure
DO-15 mechanical robustness	Supports automated axial insertion and wave soldering; meets JESD201 Class 1A whisker resistance

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 24–48 V output DC-DC converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: High-voltage output rectifier handling continuous 2 A DC current and repetitive 1000 V reverse stress. Use Value: 75 ns t_rr and 1.7 V V_F reduce switching and conduction losses, improving overall converter efficiency by ~1.2% over standard FR107-class diodes.	Use Scenario: Freewheeling path in three-phase motor drive inverters with 600–1000 V DC link. IC Role / Device Role / Timing Role: Clamp-inductive energy during IGBT turn-off; blocks 1000 V reverse voltage while recovering in <75 ns. Use Value: Low stored charge (Q_rr ≈ 0.15 µC inferred from t_rr/I_R) minimizes voltage overshoot and snubber stress.
Offline AC-DC Power Supply	Industrial UPS Charging Stage
Use Scenario: Bridge rectifier output stage in universal-input (85–265 VAC) 30–60 W adapters. IC Role / Device Role / Timing Role: Post-bridge high-voltage rectifier delivering 2 A average current into bulk capacitor. Use Value: 1000 V V_RRM provides 2× safety margin over 400 V PIV requirement, eliminating need for series stacking.	Use Scenario: Battery charging rectification in 48 V industrial UPS systems with 800 V DC bus. IC Role / Device Role / Timing Role: Unidirectional current path from high-voltage DC source to battery management circuitry. Use Value: 150 °C max junction temperature and 60 °C/W R_θJA support sustained 2 A operation without forced air in enclosed enclosures.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 24–48 V output DC-DC converters operating at 200–500 kHz.

IC Role / Device Role / Timing Role: High-voltage output rectifier handling continuous 2 A DC current and repetitive 1000 V reverse stress.

Use Value: 75 ns t_rr and 1.7 V V_F reduce switching and conduction losses, improving overall converter efficiency by ~1.2% over standard FR107-class diodes.

Use Scenario: Freewheeling path in three-phase motor drive inverters with 600–1000 V DC link.

IC Role / Device Role / Timing Role: Clamp-inductive energy during IGBT turn-off; blocks 1000 V reverse voltage while recovering in <75 ns.

Use Value: Low stored charge (Q_rr ≈ 0.15 µC inferred from t_rr/I_R) minimizes voltage overshoot and snubber stress.

Offline AC-DC Power Supply

Industrial UPS Charging Stage

Use Scenario: Bridge rectifier output stage in universal-input (85–265 VAC) 30–60 W adapters.

IC Role / Device Role / Timing Role: Post-bridge high-voltage rectifier delivering 2 A average current into bulk capacitor.

Use Value: 1000 V V_RRM provides 2× safety margin over 400 V PIV requirement, eliminating need for series stacking.

Use Scenario: Battery charging rectification in 48 V industrial UPS systems with 800 V DC bus.

IC Role / Device Role / Timing Role: Unidirectional current path from high-voltage DC source to battery management circuitry.

Use Value: 150 °C max junction temperature and 60 °C/W R_θJA support sustained 2 A operation without forced air in enclosed enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R06	600 V V_RRM, 75 ns t_rr, 1.7 V V_F, same DO-15 package	Lower voltage rating limits use to ≤600 V circuits; unsuitable for 1000 V DC bus or universal AC input with high line peaks	Select only when system V_RRM requirement is ≤600 V and cost sensitivity outweighs voltage margin needs.
UF2007	1000 V V_RRM, 75 ns t_rr, but 2.2 V V_F max and 35 A I_FSM	Higher forward drop increases conduction loss; lower surge rating reduces robustness in high-inrush applications	Acceptable where thermal budget allows higher V_F and surge events are infrequent or clamped externally.

Compared with STTH2R06 and UF2007, the HER208G-K uniquely balances 1000 V blocking, 75 ns recovery, and 1.7 V forward drop in DO-15 - making it optimal for space-constrained, high-efficiency 1000 V rectification where both voltage margin and thermal performance are critical.

Availability

HER208G-K is available at Aetrix Electronics and suitable for DC-DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for HER208G-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 devices, and MOSFETs for industrial and computing markets.

The HER20xG-K series was designed specifically for high-efficiency, high-reliability rectification in compact, cost-sensitive power supplies - emphasizing ultrafast recovery, low VF, and robust surge handling in standardized DO-15 packaging.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for HER208G-K?

The HER208G-K has a maximum repetitive peak reverse voltage of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version D2106). This rating applies under standard test conditions (T_A = 25 °C) and defines the highest reverse voltage the HER208G-K can block repeatedly without breakdown. It exceeds the 800 V rating of the HER207G-K variant and is validated for use in 1000 V DC bus and universal AC input applications.

What is the forward voltage (V_F) specification for HER208G-K at rated current?

The HER208G-K exhibits a maximum forward voltage of 1.7 V at 2 A forward current and 25 °C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. The typical V_F is lower, but design margins should be based on the 1.7 V maximum to ensure thermal stability across temperature and process variation in the final HER208G-K implementation.

Does HER208G-K have a specified reverse recovery time (t_rr)?

Yes, the HER208G-K has a maximum reverse recovery time of 75 ns, tested under defined conditions: I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications section of the Taiwan Semiconductor datasheet (Version D2106) and confirms its classification as an ultrafast recovery rectifier - critical for minimizing switching loss in high-frequency SMPS designs using the HER208G-K.

What package type does HER208G-K use, and what are its key mechanical attributes?

The HER208G-K uses the DO-204AC (DO-15) axial-leaded package, as documented in the Mechanical Data and Ordering Information sections. Key attributes include UL 94V-0 compliant molding compound, pure tin-plated leads meeting J-STD-002 solderability, cathode polarity marked by a band, and a typical weight of 0.400 g. The package supports wave soldering and meets JESD201 Class 1A whisker resistance - all verified for the HER208G-K in Version D2106.

Is HER208G-K RoHS and halogen-free compliant?

Yes, the HER208G-K is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version D2106). This compliance applies to the entire device - including die, passivation, molding compound, and lead finish - and is verified for the HER208G-K production lot release referenced in the document.

HER208G-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 1000 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 2 A

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

Reverse Recovery Time (trr):: 75 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

HER208G-K FAQ

1.How can I place an order for HER208G-K through Aetrix?

Please submit a Request for Quotation (RFQ) for HER208G-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 HER208G-K reliable?

The price and inventory of HER208G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER208G-K is usually 5 days.

3.What payment methods are accepted for HER208G-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER208G-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER208G-K?

HER208G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER208G-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 HER208G-K?

For technical support, including HER208G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER208G-K requirements.

6.How does Aetrix verify that HER208G-K is sourced from the original manufacturer or authorized distributors?

All HER208G-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 HER208G-K meets industry standards.

7.What is the process for return or replacement of HER208G-K?

All HER208G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER208G-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 HER208G-K part is unused and in its original packaging.

Return procedure for HER208G-K:

1.Submit a request within 90 days.

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

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