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

Taiwan Semiconductor Corporation HER108G

Name: HER108G
Brand: Taiwan Semiconductor Corporation
SKU: HER108G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER108G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: HER108G.pdf

Description:: DIODE GEN PURP 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:4,958

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Product details

Overview

HER108G from Taiwan Semiconductor is a 1 A, 1000 V high-efficiency glass-passivated axial-lead rectifier diode in DO-41 package, optimized for switching-mode power supplies and freewheeling applications requiring low forward voltage (1.7 V at 1 A) and high surge capability (30 A).

For engineers reviewing the HER108G datasheet, HER108G pinout, HER108G application, or HER108G equivalent, key selection criteria include peak reverse voltage rating (1000 V), junction-to-ambient thermal resistance (60 °C/W), reverse recovery time (75 ns), and AEC-Q101 qualification availability in H-suffix variants.

Technical Context

This device is a single-die, silicon planar epitaxial high-voltage rectifier with glass-passivated junction for enhanced reliability and moisture resistance. Its 1000 V V_RRM and 75 ns trr support fast-switching topologies in DC/DC converters and inverters.

The DO-41 package provides axial leads with pure tin plating (J-STD-002 compliant), polarity indicated by cathode band, and UL 94V-0 molding compound - enabling robust through-hole assembly in industrial and automotive-grade designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports primary-side rectification in offline SMPS up to 800 V DC bus
I_F	1 A continuous - suitable for medium-power auxiliary rails and bias supplies
I_FSM	30 A (8.3 ms half-sine) - withstands inrush and transient overloads without failure
V_F	1.7 V @ 1 A, 25°C - reduces conduction loss vs. standard rectifiers (e.g., 1N4007: ~1.1 V but only 1000 V derated)
t_rr	75 ns - enables operation at >100 kHz switching frequencies with low switching loss
R_θJA	60 °C/W - requires minimal PCB copper area for thermal management in ambient ≤70°C
Junction Temp	-55°C to +150°C - qualified for under-hood automotive and industrial environments

Pinout & Package

HER108G uses the DO-204AL (DO-41) axial-leaded package with cathode-indicating band. Leads are pure tin-plated and solderable per J-STD-002. Weight: 0.330 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Current entry terminal during forward conduction	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node)
Cathode (banded end)	Current exit terminal during forward conduction	Connected to output rail or energy storage capacitor; defines polarity of rectified output

Key Features

Feature	Design Value
Glass-passivated junction	Prevents moisture ingress and surface leakage, improving long-term reliability in humid environments
AEC-Q101 qualification option (HER108GH)	Validated for automotive powertrain and body electronics per stress-test requirements
UL 94V-0 molding compound	Meets flammability safety standards for enclosed industrial equipment and consumer power adapters
JESD 201 Class 2 whisker resistance	Eliminates tin whisker growth risk in high-reliability, long-life applications
Halogen-free per IEC 61249-2-21	Complies with RoHS and environmental regulations for green manufacturing and end-of-life disposal

Applications

DC/DC Converter Secondary Rectification	Switching Inverter Freewheeling Diode
Use Scenario: High-frequency isolated DC/DC converter (e.g., 12 V → 3.3 V flyback) with 100–200 kHz switching. IC Role / Device Role / Timing Role: Output rectifier converting transformer AC to regulated DC; handles 1 A average load current. Use Value: 75 ns t_rr minimizes reverse recovery loss; 1.7 V V_F balances efficiency and thermal rise at full load.	Use Scenario: Three-phase motor inverter bridge using IGBTs or MOSFETs with inductive load. IC Role / Device Role / Timing Role: Freewheeling path for back-EMF current when main switch turns off. Use Value: 30 A I_FSM safely clamps inductive kickback spikes; 1000 V V_RRM accommodates bus voltage overshoot.
AC-DC Adapter Input Bridge Leg	Automotive HVAC Blower Power Supply
Use Scenario: 230 V AC input adapter with voltage-doubler or full-wave bridge configuration. IC Role / Device Role / Timing Role: One leg of discrete bridge rectifier handling 1 A RMS input current. Use Value: Glass passivation ensures stable IR < 5 µA at 1000 V, reducing no-load leakage and standby power loss.	Use Scenario: 12 V battery-fed blower motor driver with PWM control and EMI filtering. IC Role / Device Role / Timing Role: Reverse-polarity protection and flyback suppression diode on motor coil supply line. Use Value: AEC-Q101-qualified variant (HER108GH) meets automotive temperature (-40°C to +125°C) and vibration requirements.

DC/DC Converter Secondary Rectification

Switching Inverter Freewheeling Diode

Use Scenario: High-frequency isolated DC/DC converter (e.g., 12 V → 3.3 V flyback) with 100–200 kHz switching.

IC Role / Device Role / Timing Role: Output rectifier converting transformer AC to regulated DC; handles 1 A average load current.

Use Value: 75 ns t_rr minimizes reverse recovery loss; 1.7 V V_F balances efficiency and thermal rise at full load.

Use Scenario: Three-phase motor inverter bridge using IGBTs or MOSFETs with inductive load.

IC Role / Device Role / Timing Role: Freewheeling path for back-EMF current when main switch turns off.

Use Value: 30 A I_FSM safely clamps inductive kickback spikes; 1000 V V_RRM accommodates bus voltage overshoot.

AC-DC Adapter Input Bridge Leg

Automotive HVAC Blower Power Supply

Use Scenario: 230 V AC input adapter with voltage-doubler or full-wave bridge configuration.

IC Role / Device Role / Timing Role: One leg of discrete bridge rectifier handling 1 A RMS input current.

Use Value: Glass passivation ensures stable IR < 5 µA at 1000 V, reducing no-load leakage and standby power loss.

Use Scenario: 12 V battery-fed blower motor driver with PWM control and EMI filtering.

IC Role / Device Role / Timing Role: Reverse-polarity protection and flyback suppression diode on motor coil supply line.

Use Value: AEC-Q101-qualified variant (HER108GH) meets automotive temperature (-40°C to +125°C) and vibration requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	1 A, 600 V, 50 ns t_rr, TO-220AC package	Limited to ≤600 V systems; higher thermal mass but requires heatsink for same power dissipation	Select when lower t_rr is critical and board space allows TO-220 footprint
ON Semi MUR110	1 A, 1000 V, 75 ns t_rr, DO-41, VF = 1.7 V - identical electrical specs but non-AEC-Q101 rated	No automotive qualification; slightly higher IR at 125°C (200 µA vs. HER108G's 150 µA)	Select for cost-sensitive industrial designs where AEC-Q101 is not required

Compared with STTH1R06 and MUR110, HER108G uniquely combines 1000 V rating, 75 ns recovery, DO-41 form factor, and optional AEC-Q101 qualification - making it optimal for space-constrained, high-reliability 1000 V rectification where thermal and mechanical constraints preclude TO-220 devices.

Availability

HER108G is available at Aetrix Electronics and suitable for DC/DC converters, switching inverters, and freewheeling applications requiring stable component supply across automotive, industrial, and consumer power electronics programs.

Supply support for HER108G 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 global power management and automotive markets since 1979.

The HER101G–HER108G series targets high-efficiency, high-reliability rectification in compact power supplies - designed specifically for switching-mode applications demanding low VF, fast recovery, and extended temperature operation.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for HER108G?

The HER108G has a V_RRM of 1000 V, confirmed in the Absolute Maximum Ratings table. This rating applies at T_A = 25°C and derates linearly above 25°C ambient per the Forward Current Derating Curve. HER108G is the highest-voltage member of the HER101G–HER108G family, where "8" denotes 1000 V.

Is HER108G suitable for automotive applications?

Yes - the HER108GH variant (AEC-Q101 qualified) is explicitly listed in the Ordering Information section. While HER108G itself is not automatically qualified, its construction (glass passivation, JESD 201 Class 2, halogen-free) and operating range (-55°C to +150°C) align with automotive requirements. For certified use, specify HER108GH.

What is the forward voltage drop (V_F) of HER108G at rated current?

HER108G exhibits a typical forward voltage of 1.7 V at I_F = 1 A and T_J = 25°C, as specified in the Electrical Specifications table. This value increases with junction temperature and current - e.g., ~2.0 V at 125°C junction temperature per Fig.4 Typical Forward Characteristics.

Does HER108G have a defined reverse recovery time (t_rr)?

Yes - HER108G has a maximum reverse recovery time of 75 ns under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as stated in the Electrical Specifications table. This value is shared with HER106G and HER107G, distinguishing them from lower-voltage variants (≤50 ns).

What package type does HER108G use, and what are its mechanical features?

HER108G uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include pure tin-plated leads (J-STD-002 compliant), UL 94V-0 flammability-rated epoxy molding, cathode polarity band, and 0.330 g weight. Dimensions conform to standard DO-41 outline drawings in the Package Outline Dimensions section.

HER108G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 1 A

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

Reverse Recovery Time (trr):: 75 ns

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

Capacitance @ Vr, F:: 10pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

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

HER108G FAQ

1.How can I place an order for HER108G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER108G 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 HER108G reliable?

The price and inventory of HER108G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER108G is usually 5 days.

3.What payment methods are accepted for HER108G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER108G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER108G?

HER108G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER108G 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 HER108G?

For technical support, including HER108G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER108G requirements.

6.How does Aetrix verify that HER108G is sourced from the original manufacturer or authorized distributors?

All HER108G 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 HER108G meets industry standards.

7.What is the process for return or replacement of HER108G?

All HER108G units undergo pre-shipment inspection (PSI). If there is an issue with HER108G, 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 HER108G part is unused and in its original packaging.

Return procedure for HER108G:

1.Submit a request within 90 days.

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

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