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

Taiwan Semiconductor Corporation HER151G R0G

Name: HER151G R0G
Brand: Taiwan Semiconductor Corporation
SKU: HER151G R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER151G R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: HER151G R0G.pdf

Description:: DIODE GEN PURP 50V 1.5A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:2,848

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Product details

Overview

HER151G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode in DO-204AC (DO-15) package, rated for 1.5A average forward current, 50V repetitive peak reverse voltage, and 50A surge current. It delivers low forward voltage (1.0V at 1.5A, 25°C), fast reverse recovery (50ns), and operates up to 150°C junction temperature - ideal for compact DC-DC converters requiring reliable freewheeling.

For engineers reviewing the HER151G datasheet, HER151G pinout, HER151G application, or HER151G equivalent, key selection criteria include its 50V V_RRM, 1.0V V_F at rated current, 50ns t_rr, DO-15 mechanical compatibility, and AEC-Q101 qualification availability (HER151GH variant).

Technical Context

This single-die, axial-leaded rectifier uses a glass-passivated PN junction to achieve high surge robustness and stable leakage performance across temperature. Its 50ns reverse recovery time and 35pF junction capacitance support operation in high-frequency switching topologies up to several hundred kHz.

The device's thermal resistance of 60°C/W (junction-to-ambient) and 150°C maximum junction temperature enable sustained conduction in thermally constrained PCB layouts without forced cooling, while its pure tin-plated leads ensure J-STD-002 solderability and JESD201 Class 2 whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling clamp circuits
I_F	1.5 A - Continuous average forward current at 75°C ambient; determines steady-state power handling in DC-DC output stages
I_FSM	50 A - Peak non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload tolerance
V_F	1.0 V @ 1.5A, 25°C - Low conduction loss improves efficiency and reduces thermal stress in high-duty-cycle applications
t_rr	50 ns - Fast recovery minimizes switching losses and EMI in 100–500 kHz SMPS designs
C_J	35 pF @ 1MHz, 4V - Low junction capacitance limits displacement current and improves high-frequency rectification fidelity
R_θJA	60 °C/W - Enables ~1.2W dissipation at 75°C ambient before reaching 150°C T_J limit with standard PCB copper area

Pinout & Package

HER151G is housed in a DO-204AC (DO-15) axial-leaded package with cathode indicated by a band. Leads are pure tin-plated and compliant with J-STD-002 solderability requirements.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck freewheel path)
Cathode	Forward current exit / reverse blocking terminal	Marked with band; ties to output rail or inductor return; blocks reverse voltage up to 50V

Key Features

Feature	Design Value
Glass-passivated junction	Enhances humidity resistance and long-term reliability under thermal cycling and high-humidity environments
Low V_F (1.0V)	Reduces conduction loss by >15% vs. standard 1N400x series at 1.5A, lowering heatsink requirements
Fast t_rr (50ns)	Enables use in higher-frequency converters where slower diodes would incur excessive switching loss
AEC-Q101 qualified option	HER151GH variant meets automotive-grade stress testing for under-hood and body electronics
RoHS & halogen-free	Complies with IEC 61249-2-21; supports environmentally regulated industrial and consumer end equipment

Applications

DC-DC Converter Output Rectification	Switching Mode Power Supply Freewheeling
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V at ≤1.5A. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during transformer reset phase; blocks reverse voltage during primary switch ON time. Use Value: 1.0V V_F minimizes output loss; 50ns t_rr prevents cross-conduction loss with synchronous MOSFETs in quasi-resonant designs.	Use Scenario: Freewheeling path for inductive loads in buck-derived regulators powering FPGA core rails or motor drivers. IC Role / Device Role / Timing Role: Provides low-impedance return path for inductor current when main switch turns OFF; clamps inductive kickback. Use Value: 50A I_FSM withstands startup surges; DO-15 footprint allows direct replacement of legacy 1N54xx diodes without layout change.
Industrial AC-DC Adapter Input Stage	Automotive Body Control Module Power Supply
Use Scenario: Bridge rectifier input stage in universal-input (85–265VAC) offline adapters rated ≤15W. IC Role / Device Role / Timing Role: One leg of full-wave bridge; conducts half-sine current pulses at line frequency with minimal heating. Use Value: 150°C T_JMAX and 60°C/W R_θJA allow operation in sealed enclosures; RoHS/halogen-free compliance meets regional safety mandates.	Use Scenario: 12V auxiliary supply rectification in BCMs exposed to under-hood temperature extremes (−40°C to +125°C ambient). IC Role / Device Role / Timing Role: High-reliability rectifier in AEC-Q101-qualified power rail (HER151GH variant); handles load dump transients. Use Value: Glass passivation and JESD201 Class 2 whisker resistance ensure long-term stability in vibration-prone automotive environments.

DC-DC Converter Output Rectification

Switching Mode Power Supply Freewheeling

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24V at ≤1.5A.

IC Role / Device Role / Timing Role: Unidirectional current valve conducting during transformer reset phase; blocks reverse voltage during primary switch ON time.

Use Value: 1.0V V_F minimizes output loss; 50ns t_rr prevents cross-conduction loss with synchronous MOSFETs in quasi-resonant designs.

Use Scenario: Freewheeling path for inductive loads in buck-derived regulators powering FPGA core rails or motor drivers.

IC Role / Device Role / Timing Role: Provides low-impedance return path for inductor current when main switch turns OFF; clamps inductive kickback.

Use Value: 50A I_FSM withstands startup surges; DO-15 footprint allows direct replacement of legacy 1N54xx diodes without layout change.

Industrial AC-DC Adapter Input Stage

Automotive Body Control Module Power Supply

Use Scenario: Bridge rectifier input stage in universal-input (85–265VAC) offline adapters rated ≤15W.

IC Role / Device Role / Timing Role: One leg of full-wave bridge; conducts half-sine current pulses at line frequency with minimal heating.

Use Value: 150°C T_JMAX and 60°C/W R_θJA allow operation in sealed enclosures; RoHS/halogen-free compliance meets regional safety mandates.

Use Scenario: 12V auxiliary supply rectification in BCMs exposed to under-hood temperature extremes (−40°C to +125°C ambient).

IC Role / Device Role / Timing Role: High-reliability rectifier in AEC-Q101-qualified power rail (HER151GH variant); handles load dump transients.

Use Value: Glass passivation and JESD201 Class 2 whisker resistance ensure long-term stability in vibration-prone automotive environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L06U	600V V_RRM, 1.05V V_F, 55ns t_rr, SOD-123FL package	Higher voltage rating but surface-mount only; not mechanically interchangeable	Select for space-constrained PCBs needing >50V margin and automated assembly
ON Semi MUR150	50V V_RRM, 1.15V V_F, 75ns t_rr, DO-15 package	Slower recovery and higher V_F; same axial footprint and mounting	Acceptable drop-in replacement where 50ns t_rr is not critical and 0.15V higher loss is tolerable

Compared with STTH1L06U and MUR150, HER151G offers the lowest V_F (1.0V) and fastest t_rr (50ns) in the DO-15 form factor, making it optimal for thermally sensitive, high-frequency DC-DC outputs where efficiency and EMI control are prioritized over voltage headroom.

Availability

HER151G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching mode power supply freewheeling, and industrial AC-DC adapter input stages requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for HER151G 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 for industrial and automotive markets.

HER151G belongs to TSC's HER (High-Efficiency Rectifier) family, engineered specifically for high-frequency switching power supplies where low forward voltage, fast recovery, and rugged thermal performance are essential design requirements.

FAQ

What is the maximum junction temperature rating for HER151G?

The HER151G has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version I2105). This rating enables reliable operation in enclosed or high-ambient-temperature environments when derated per the forward current derating curve. Thermal design must ensure junction temperature remains below 150°C under worst-case load and ambient conditions for HER151G.

Is HER151G pin-compatible with standard 1N4001–1N4007 diodes?

Yes, HER151G uses the DO-204AC (DO-15) package with identical lead spacing, diameter, and axial orientation as 1N400x series diodes, enabling direct mechanical replacement on existing PCBs. However, HER151G offers significantly faster recovery (50ns vs. >2μs) and lower V_F (1.0V vs. ~1.1V), so circuit timing and efficiency improve without layout changes - provided voltage rating (50V) suffices for the application.

Does HER151G meet automotive qualification standards?

The base HER151G is not AEC-Q101 qualified, but Taiwan Semiconductor offers the HER151GH variant - identical electrically and mechanically, with full AEC-Q101 stress testing certification. HER151GH is recommended for automotive body electronics, infotainment power supplies, and other automotive applications requiring qualified components; HER151G remains suitable for industrial and consumer use.

What is the typical reverse leakage current of HER151G at 125°C?

At 125°C junction temperature and rated reverse voltage (50V), the HER151G exhibits a maximum reverse leakage current (I_R) of 150 µA, per electrical specifications in the Taiwan Semiconductor datasheet. This value is measured under pulse conditions (PW = 30ms) and reflects stable performance under elevated thermal stress, supporting reliable operation in high-temperature power conversion stages using HER151G.

Can HER151G be used in a full-wave bridge configuration?

Yes, HER151G can be used as one leg in a discrete full-wave bridge rectifier. Four HER151G diodes configured in a standard bridge topology support up to 1.5A average DC output current and 50V peak inverse voltage per leg. Its low V_F and fast t_rr reduce conduction and switching losses compared to general-purpose rectifiers, improving overall bridge efficiency - especially in high-frequency or thermally limited designs using HER151G.

HER151G R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1.5A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 1.5 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 35pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

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

HER151G R0G FAQ

1.How can I place an order for HER151G R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER151G 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 HER151G R0G reliable?

The price and inventory of HER151G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER151G R0G is usually 5 days.

3.What payment methods are accepted for HER151G R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER151G R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER151G R0G?

HER151G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER151G 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 HER151G R0G?

For technical support, including HER151G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER151G R0G requirements.

6.How does Aetrix verify that HER151G R0G is sourced from the original manufacturer or authorized distributors?

All HER151G 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 HER151G R0G meets industry standards.

7.What is the process for return or replacement of HER151G R0G?

All HER151G R0G units undergo pre-shipment inspection (PSI). If there is an issue with HER151G 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 HER151G R0G part is unused and in its original packaging.

Return procedure for HER151G R0G:

1.Submit a request within 90 days.

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

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