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

Taiwan Semiconductor Corporation HER102G

Name: HER102G
Brand: Taiwan Semiconductor Corporation
SKU: HER102G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HER102G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: HER102G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:4,702

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Product details

Overview

HER102G from Taiwan Semiconductor is a high-efficiency, glass-passivated silicon rectifier diode rated for 1 A average forward current and 100 V repetitive peak reverse voltage (V_RRM), with low 1.0 V forward voltage at 1 A and 50 ns reverse recovery time - used in DC-DC converters and switching-mode power supplies where fast recovery and thermal reliability are critical.

For engineers reviewing the HER102G datasheet, HER102G pinout, HER102G application, or HER102G equivalent, key selection factors include its DO-41 package compatibility, AEC-Q101 qualification option (HER102GH), 30 A surge capability, 150 °C max junction temperature, and verified performance in freewheeling and flyback topologies.

Technical Context

The HER102G employs a single-die, planar-glass-passivated PN junction optimized for high-speed switching in medium-voltage SMPS applications. Its 50 ns reverse recovery time (trr) and 15 pF junction capacitance at 1 MHz/4 V enable reduced switching losses compared to standard rectifiers.

Thermally, it features a junction-to-ambient resistance of 60 °C/W and junction-to-case resistance of 15 °C/W in the DO-204AL (DO-41) package, supporting continuous 1 A operation up to 75 °C ambient when mounted on FR-4 PCB with minimal copper area.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum non-repetitive reverse voltage the device blocks reliably in circuit
I_F	1 A - continuous average forward current rating at 75 °C ambient on standard PCB
V_F @ 1 A	1.0 V - forward voltage drop determining conduction loss and thermal rise in power stage
t_rr	50 ns - reverse recovery time defining minimum dead-time requirements in synchronous designs
I_FSM	30 A - peak non-repetitive surge current handling capability during startup or fault conditions
T_J(max)	150 °C - maximum allowable junction temperature enabling operation in compact, thermally constrained enclosures
C_J	15 pF @ 1 MHz, 4 V - junction capacitance influencing high-frequency noise coupling and EMI filter design

Pinout & Package

HER102G is housed in a DO-204AL (DO-41) axial-leaded package with cathode indicated by a band; leads are pure tin-plated and solderable per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connects to lower-potential node (e.g., switch node in buck converter or transformer secondary)
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connects to output rail or positive bus; must withstand full V_RRM during off-state

Key Features

Feature	Design Value
Glass passivated junction	Enables stable leakage performance and long-term reliability under humidity and thermal cycling
AEC-Q101 qualified variant available (HER102GH)	Validated for automotive powertrain and body electronics requiring stress-tested component qualification
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated industrial and consumer systems
UL 94V-0 molding compound	Provides flame-retardant encapsulation essential for safety-critical power supply certifications

Applications

DC–DC Converters	Switching Inverters
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs at ≤10 W. IC Role / Device Role / Timing Role: High-efficiency unidirectional current path converting high-frequency AC from transformer to regulated DC. Use Value: 1.0 V V_F minimizes conduction loss; 50 ns t_rr reduces switching loss and EMI generation vs. standard rectifiers.	Use Scenario: Output stage rectification in 12 V–48 V input inverters for solar micro-inverters or UPS systems. IC Role / Device Role / Timing Role: Freewheeling diode across inductive loads and output rectifier in H-bridge configurations. Use Value: 30 A I_FSM handles inrush and short-circuit surges; DO-41 package allows manual rework and through-hole reliability.
Freewheeling Diodes	Industrial SMPS
Use Scenario: Inductive load protection in relay drivers, solenoid controllers, and motor gate-drive circuits. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET/IGBT turn-off to clamp inductive kick. Use Value: Fast 50 ns recovery prevents voltage overshoot beyond 100 V rating; 150 °C T_J(max) supports operation near hot power semiconductors.	Use Scenario: Input rectification and auxiliary supply generation in DIN-rail-mounted PLC power modules. IC Role / Device Role / Timing Role: Primary AC–DC interface and bias supply rectifier in multi-output industrial switchers. Use Value: Glass passivation ensures stability over 10+ year field life; UL 94V-0 compound meets EN 62368-1 safety requirements.

DC–DC Converters

Switching Inverters

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs at ≤10 W.

IC Role / Device Role / Timing Role: High-efficiency unidirectional current path converting high-frequency AC from transformer to regulated DC.

Use Value: 1.0 V V_F minimizes conduction loss; 50 ns t_rr reduces switching loss and EMI generation vs. standard rectifiers.

Use Scenario: Output stage rectification in 12 V–48 V input inverters for solar micro-inverters or UPS systems.

IC Role / Device Role / Timing Role: Freewheeling diode across inductive loads and output rectifier in H-bridge configurations.

Use Value: 30 A I_FSM handles inrush and short-circuit surges; DO-41 package allows manual rework and through-hole reliability.

Freewheeling Diodes

Industrial SMPS

Use Scenario: Inductive load protection in relay drivers, solenoid controllers, and motor gate-drive circuits.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET/IGBT turn-off to clamp inductive kick.

Use Value: Fast 50 ns recovery prevents voltage overshoot beyond 100 V rating; 150 °C T_J(max) supports operation near hot power semiconductors.

Use Scenario: Input rectification and auxiliary supply generation in DIN-rail-mounted PLC power modules.

IC Role / Device Role / Timing Role: Primary AC–DC interface and bias supply rectifier in multi-output industrial switchers.

Use Value: Glass passivation ensures stability over 10+ year field life; UL 94V-0 compound meets EN 62368-1 safety requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	Same 1 A / 600 V rating but higher V_F (1.3 V typ), slower t_rr (75 ns), TO-220AC package	Requires heatsink above ~0.5 A; unsuitable for space-constrained DO-41 layouts	Select HER102G for cost-sensitive, board-level 100 V rectification where DO-41 footprint and low V_F are prioritized.
ES1B	1 A / 100 V, 35 ns t_rr, but only 10 A I_FSM and no AEC-Q101 option	Limited surge robustness in high-inductance circuits; not qualified for automotive use	Choose HER102G when 30 A surge margin or AEC-Q101 compliance (via HER102GH) is required.

Compared with STTH1R06 and ES1B, HER102G delivers optimal balance of low forward loss, fast recovery, and proven reliability in compact through-hole packages - especially where surge immunity, thermal headroom, and qualification traceability matter.

Availability

HER102G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial SMPS requiring stable component supply with consistent DO-41 mechanical fit and electrical performance across production lots.

Supply support for HER102G 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 since 1979.

The HER10xG series was developed specifically for high-reliability, medium-voltage switching power supplies in automotive, industrial, and consumer applications - emphasizing fast recovery, thermal robustness, and qualification-ready variants.

FAQ

What is the maximum junction temperature rating for HER102G?

The HER102G has a maximum junction temperature (T_J(max)) of +150 °C, allowing reliable operation in thermally demanding environments such as enclosed power supplies or proximity to heat-generating components. This rating is validated under specified thermal conditions and supports derating curves up to 75 °C ambient at full 1 A load. HER102G must be mounted with adequate PCB copper area to maintain safe operating temperature.

Is HER102G pin-compatible with other DO-41 rectifiers like 1N4002 or UF4002?

HER102G uses the standard DO-41 axial package with anode/cathode polarity matching industry convention (cathode band on one end), making it mechanically interchangeable with 1N4002 and UF4002. However, HER102G offers significantly faster recovery (50 ns vs. 2 µs for 1N4002) and lower V_F than 1N4002, so direct substitution requires circuit validation for switching speed and loss trade-offs. HER102G is not a drop-in replacement for UF4002 without checking layout thermal margins.

Does HER102G meet automotive qualification standards?

The base HER102G is not AEC-Q101 qualified, but Taiwan Semiconductor offers the HER102GH variant - identical electrically and mechanically but fully tested and certified to AEC-Q101 for automotive applications. HER102GH includes extended temperature cycling, humidity testing, and failure analysis per the standard. For automotive designs, specify HER102GH rather than HER102G to ensure compliance.

What is the reverse leakage current specification for HER102G at elevated temperature?

HER102G specifies a maximum reverse leakage current (I_R) of 150 µA at 125 °C and rated reverse voltage (100 V). At 25 °C, leakage is limited to 5 µA. This elevated-temperature leakage performance is enabled by the glass-passivated junction and supports stable operation in high-ambient environments such as engine bay or industrial control cabinets where thermal management is limited.

Can HER102G be used in surface-mount designs?

HER102G is only offered in the through-hole DO-41 package and is not available in surface-mount variants. It cannot be directly used in SMT-only assemblies without adapter hardware. For SMT alternatives with similar 1 A / 100 V specs, consider devices like SMAJ10A or SOD-123 packaged fast rectifiers - but note differences in t_rr, V_F, and thermal resistance. HER102G remains optimal for through-hole prototyping, repair, or legacy board upgrades.

HER102G 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):: 100 V

Current - Average Rectified (Io):: 1A

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

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 100 V

Capacitance @ Vr, F:: 15pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

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

HER102G FAQ

1.How can I place an order for HER102G through Aetrix?

Please submit a Request for Quotation (RFQ) for HER102G 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 HER102G reliable?

The price and inventory of HER102G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER102G is usually 5 days.

3.What payment methods are accepted for HER102G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER102G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HER102G?

HER102G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HER102G 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 HER102G?

For technical support, including HER102G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER102G requirements.

6.How does Aetrix verify that HER102G is sourced from the original manufacturer or authorized distributors?

All HER102G 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 HER102G meets industry standards.

7.What is the process for return or replacement of HER102G?

All HER102G units undergo pre-shipment inspection (PSI). If there is an issue with HER102G, 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 HER102G part is unused and in its original packaging.

Return procedure for HER102G:

1.Submit a request within 90 days.

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

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