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

Taiwan Semiconductor Corporation ES1GALH

Name: ES1GALH
Brand: Taiwan Semiconductor Corporation
SKU: ES1GALH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ES1GALH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: ES1GALH.pdf

Description:: 35NS, 1A, 400V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

ES1GALH from Taiwan Semiconductor is a 1A, 400V super fast surface-mount rectifier diode in a Thin SMA package, featuring 35ns reverse recovery time, 0.93V typical forward voltage at 1.0A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a freewheeling or snubber diode in DC/DC converters where low conduction loss and fast switching are required.

For engineers reviewing the ES1GALH datasheet, ES1GALH pinout, ES1GALH application, or ES1GALH equivalent, key selection criteria include its 400V V_RRM, 30A I_FSM surge rating, 16pF junction capacitance at 1MHz/4V, -55°C to +150°C operating temperature range, and compatibility with automated SMT placement on thin-profile PCBs.

Technical Context

The ES1GALH employs a glass-passivated silicon junction optimized for super-fast recovery (t_rr ≤ 35ns), minimizing switching losses in high-frequency power conversion. Its single-die configuration and Thin SMA package support compact layout and thermal performance with R_θJL = 28°C/W.

Designed for automotive and industrial DC/DC applications, it delivers stable reverse leakage (<1µA at 25°C, <20µA at 125°C) and low forward voltage drift across temperature - 0.77V typical at 1.0A/125°C - enabling efficient operation under thermal stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking capability in 400V-rated circuits.
I_F	1 A - Continuous forward current rating; supports sustained 1A DC conduction without derating at T_A ≤ 75°C.
t_rr	≤35 ns - Reverse recovery time; enables use in >100 kHz switching topologies with minimal turn-off loss.
V_F @ 1A, 25°C	0.93 V typ - Low forward drop reduces conduction loss and self-heating in high-duty-cycle rectification.
C_J @ 1MHz, 4V	16 pF - Junction capacitance limits high-frequency displacement current and EMI generation in snubber networks.
R_θJL	28 °C/W - Junction-to-lead thermal resistance; allows direct heat transfer to PCB copper, supporting compact thermal design.

Pinout & Package

Package: Thin SMA (Surface Mount Assembly), low-profile molded case with matte tin-plated leads, polarity indicated by cathode band, moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of load or switch node; must handle full 1A DC and 60A 1ms surge.
Cathode	Forward current exit / reverse blocking terminal	Connected to higher-potential rail; sustains up to 400V reverse bias with <1µA leakage at 25°C.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; suitable for under-hood and ADAS power stages.
Glass passivated junction	Provides robust surface insulation against humidity, contamination, and mechanical stress - critical for long-term reliability in harsh environments.
Low profile Thin SMA package	Height ≤ 1.1mm enables integration into space-constrained modules (e.g., LED drivers, infotainment DC/DC) without interference with adjacent components.
16 pF junction capacitance	Reduces capacitive coupling noise and improves EMI margin in high-dv/dt switching nodes compared to standard FR/Fast Recovery diodes (>30pF).

Applications

Automotive DC/DC Converters	Industrial Snubber Circuits
Use Scenario: Step-down converter supplying 5V/3.3V rails for ECUs and sensors in 12V/48V vehicle architectures. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~1.2% over standard FR1G at 250kHz.	Use Scenario: RC snubber network across MOSFET drain-source in motor drive inverters to suppress voltage spikes during turn-off. IC Role / Device Role / Timing Role: Fast-recovery clamp diode that conducts transient energy into the snubber capacitor before MOSFET avalanche. Use Value: 400V V_RRM and 16pF C_J enable precise spike clamping with minimal parasitic oscillation, reducing EMI filter burden.
LED Driver Secondary Rectification	Consumer Power Adapter Output Stage
Use Scenario: Secondary-side rectification in isolated flyback LED drivers for street lighting and commercial fixtures. IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC, operating at 60–130kHz. Use Value: 0.93V V_F at 1A lowers conduction loss vs. Schottky alternatives with similar V_RRM, extending thermal margin in sealed enclosures.	Use Scenario: Output rectification in universal-input 5V/1A wall adapters meeting Level VI efficiency standards. IC Role / Device Role / Timing Role: Primary output diode in discontinuous conduction mode (DCM) flyback, handling peak currents up to 30A. Use Value: 30A I_FSM (8.3ms) withstands startup surges and short-circuit events without failure, enhancing field reliability.

Automotive DC/DC Converters

Industrial Snubber Circuits

Use Scenario: Step-down converter supplying 5V/3.3V rails for ECUs and sensors in 12V/48V vehicle architectures.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck topology, conducting during low-side switch off-time.

Use Value: 35ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~1.2% over standard FR1G at 250kHz.

Use Scenario: RC snubber network across MOSFET drain-source in motor drive inverters to suppress voltage spikes during turn-off.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode that conducts transient energy into the snubber capacitor before MOSFET avalanche.

Use Value: 400V V_RRM and 16pF C_J enable precise spike clamping with minimal parasitic oscillation, reducing EMI filter burden.

LED Driver Secondary Rectification

Consumer Power Adapter Output Stage

Use Scenario: Secondary-side rectification in isolated flyback LED drivers for street lighting and commercial fixtures.

IC Role / Device Role / Timing Role: Output rectifier converting transformer secondary AC to regulated DC, operating at 60–130kHz.

Use Value: 0.93V V_F at 1A lowers conduction loss vs. Schottky alternatives with similar V_RRM, extending thermal margin in sealed enclosures.

Use Scenario: Output rectification in universal-input 5V/1A wall adapters meeting Level VI efficiency standards.

IC Role / Device Role / Timing Role: Primary output diode in discontinuous conduction mode (DCM) flyback, handling peak currents up to 30A.

Use Value: 30A I_FSM (8.3ms) withstands startup surges and short-circuit events without failure, enhancing field reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L04S	400V V_RRM, 1A I_F, 30ns t_rr, SMA package, but not AEC-Q101 qualified	Lacks automotive qualification; limited to industrial/commercial use only	Select when AEC-Q101 is not required and faster t_rr is prioritized over qualification status.
ON Semi MUR140	400V V_RRM, 1A I_F, 50ns t_rr, DO-41 through-hole package	Through-hole mounting; incompatible with SMT automation; higher thermal resistance	Choose only for legacy through-hole designs where rework to SMT is impractical.

Compared with STTH1L04S and MUR140, ES1GALH uniquely combines AEC-Q101 qualification, 35ns recovery, and Thin SMA packaging - making it the only option among the three qualified for automotive SMT power conversion with balanced speed, reliability, and board-area efficiency.

Availability

ES1GALH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and LED driver secondary rectification requiring stable component supply, AEC-Q101 compliance, and consistent Thin SMA packaging.

Supply support for ES1GALH 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 devices, rectifiers, TVS, and protection ICs since 1979.

The ES1GALH belongs to TSC's ES1xALH super fast rectifier family, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial systems where fast recovery, low V_F, and AEC-Q101 validation are mandatory.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for ES1GALH?

The ES1GALH has a maximum repetitive peak reverse voltage (V_RRM) of 400 V. This rating ensures reliable blocking capability in circuits where the reverse voltage does not exceed 400 V under normal operating conditions. The value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2103) and applies specifically to the ES1GALH variant within the ES1xALH series.

Is ES1GALH qualified for automotive applications?

Yes, ES1GALH is AEC-Q101 qualified, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD), confirming suitability for automotive power electronics such as body control modules, lighting drivers, and DC/DC converters deployed in passenger vehicles.

What is the forward voltage (V_F) of ES1GALH at 1.0A and 25°C?

The typical forward voltage (V_F) of ES1GALH is 0.93 V at 1.0A and 25°C, with a maximum of 1.30 V under the same conditions. This value is specified in the ELECTRICAL SPECIFICATIONS table for ES1GALH and reflects its super fast rectifier design optimized for low conduction loss in high-frequency switching applications.

Does ES1GALH have a defined reverse recovery time (t_rr)?

Yes, ES1GALH has a maximum reverse recovery time (t_rr) of 35 ns, measured at I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A. This parameter is listed in the ELECTRICAL SPECIFICATIONS table and confirms its classification as a super fast rectifier, enabling efficient operation in switching frequencies above 100 kHz.

What package type does ES1GALH use, and is it compatible with automated assembly?

ES1GALH uses the Thin SMA surface-mount package, with matte tin-plated leads solderable per J-STD-002 and moisture sensitivity level 1 per J-STD-020. The datasheet explicitly states it is "ideal for automated placement," confirming full compatibility with standard SMT pick-and-place equipment and reflow profiles used in high-volume manufacturing.

ES1GALH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-221AC, SMA Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

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

Reverse Recovery Time (trr):: 35 ns

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 16pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: Thin SMA

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

ES1GALH FAQ

1.How can I place an order for ES1GALH through Aetrix?

Please submit a Request for Quotation (RFQ) for ES1GALH 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 ES1GALH reliable?

The price and inventory of ES1GALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1GALH is usually 5 days.

3.What payment methods are accepted for ES1GALH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1GALH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ES1GALH?

ES1GALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ES1GALH 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 ES1GALH?

For technical support, including ES1GALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1GALH requirements.

6.How does Aetrix verify that ES1GALH is sourced from the original manufacturer or authorized distributors?

All ES1GALH 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 ES1GALH meets industry standards.

7.What is the process for return or replacement of ES1GALH?

All ES1GALH units undergo pre-shipment inspection (PSI). If there is an issue with ES1GALH, 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 ES1GALH part is unused and in its original packaging.

Return procedure for ES1GALH:

1.Submit a request within 90 days.

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

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