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

Taiwan Semiconductor Corporation ES1FLH

Name: ES1FLH
Brand: Taiwan Semiconductor Corporation
SKU: ES1FLH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ES1FLH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123

Datasheet:: ES1FLH.pdf

Description:: 35NS, 1A, 300V, SUPER FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:8,808

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Product details

Overview

ES1FLH from Taiwan Semiconductor is a 1A, 400V super fast surface-mount rectifier diode in Sub SMA package, featuring 35ns reverse recovery time, 1.30V max forward voltage at 1A/25°C, and AEC-Q101 qualification for automotive use in DC-DC converters and freewheeling circuits.

For engineers reviewing the ES1FLH datasheet, ES1FLH pinout, ES1FLH application, or ES1FLH equivalent, key selection criteria include V_RRM = 400V, I_F = 1A, t_rr = 35ns, R_θJA = 85°C/W, and Sub SMA package compatibility with automated placement and automotive-grade reliability requirements.

Technical Context

This super fast rectifier uses a glass-passivated silicon junction to achieve low forward voltage drop and rapid switching, enabling high-efficiency power conversion in compact layouts. Its 35ns reverse recovery time minimizes switching losses during high-frequency operation in DC-DC topologies.

The device operates across –55°C to +150°C junction temperature range and maintains ≤5µA reverse leakage at 25°C and rated V_R, supporting stable performance in thermally demanding automotive environments including car lighting and snubber networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage the diode blocks without breakdown; defines safe operating ceiling in 400V-rated power rails.
I_F	1 A - Continuous average forward current rating; supports sustained conduction in low-power DC-DC and auxiliary supply paths.
t_rr	35 ns - Measured reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A; enables efficient switching up to ~3–5 MHz.
V_F (max)	1.30 V @ 1A, 25°C - Peak forward voltage drop; determines conduction loss (1.3W max at 1A) and thermal load in linear-regulator or freewheeling roles.
R_θJA	85 °C/W - Junction-to-ambient thermal resistance; used with P_D to estimate board-level temperature rise without heatsink.
Junction capacitance	8 pF @ 1MHz, 4V - Low C_J reduces capacitive coupling and EMI in high-dv/dt switching nodes.
AEC-Q101	Qualified - Validated for automotive electronic systems per stress-test standard; required for under-hood and lighting applications.

Pinout & Package

Package: Sub SMA - Low-profile, surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity marking. Weight: 0.019g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit (e.g., switch node in buck freewheel path); must handle full I_F and I_FSM = 30A surge.
Cathode	Forward current exit / reverse voltage blocking terminal	Marked by band; connects to higher-potential rail (e.g., output capacitor positive); withstands up to 400V reverse bias continuously.

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability and moisture resistance without hermetic sealing-critical for automotive under-hood exposure.
Sub SMA package	0.019g weight and low profile support high-density PCB layouts and automated SMT assembly with J-STD-002 solderability.
35ns reverse recovery	Reduces switching loss and EMI generation compared to standard rectifiers (>100ns), improving efficiency in 100–500 kHz DC-DC converters.
AEC-Q101 qualification	Validates robustness against temperature cycling, mechanical shock, and HTRB stress-required for OEM automotive component approval.
Moisture sensitivity level 1	Eliminates need for dry-pack or baking prior to reflow; simplifies manufacturing and reduces process risk.

Applications

DC-DC Converter	Automotive Lighting
Use Scenario: Secondary-side rectification in isolated flyback or non-isolated buck converters powering infotainment or ADAS subsystems. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; critical for energy transfer and voltage regulation stability. Use Value: 35ns t_rr and 1.30V V_F minimize conduction + switching losses, sustaining >88% efficiency at 1A/12V output.	Use Scenario: LED driver output stage in headlamp or DRL modules where space and thermal constraints limit heatsinking. IC Role / Device Role / Timing Role: Output rectifier and current path control element; handles pulsed LED current with minimal voltage overhead. Use Value: AEC-Q101 qualification and 150°C T_JMAX ensure operational integrity across –40°C to +125°C ambient vehicle environments.
Snubber Network	Freewheeling Circuit
Use Scenario: RC snubber across MOSFET or relay contacts in 12V/24V automotive power distribution units. IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive kickback energy during turn-off transitions. Use Value: 30A I_FSM and 35ns t_rr enable reliable suppression of >100V transients without oscillation or latch-up.	Use Scenario: Inductor current recirculation path in brushed DC motor drivers or solenoid control circuits. IC Role / Device Role / Timing Role: Unidirectional current path preventing back-EMF damage to driving switches during coil de-energization. Use Value: Low 1.30V V_F limits voltage drop across freewheel path, preserving torque response and reducing thermal stress on PCB traces.

DC-DC Converter

Automotive Lighting

Use Scenario: Secondary-side rectification in isolated flyback or non-isolated buck converters powering infotainment or ADAS subsystems.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; critical for energy transfer and voltage regulation stability.

Use Value: 35ns t_rr and 1.30V V_F minimize conduction + switching losses, sustaining >88% efficiency at 1A/12V output.

Use Scenario: LED driver output stage in headlamp or DRL modules where space and thermal constraints limit heatsinking.

IC Role / Device Role / Timing Role: Output rectifier and current path control element; handles pulsed LED current with minimal voltage overhead.

Use Value: AEC-Q101 qualification and 150°C T_JMAX ensure operational integrity across –40°C to +125°C ambient vehicle environments.

Snubber Network

Freewheeling Circuit

Use Scenario: RC snubber across MOSFET or relay contacts in 12V/24V automotive power distribution units.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode absorbing inductive kickback energy during turn-off transitions.

Use Value: 30A I_FSM and 35ns t_rr enable reliable suppression of >100V transients without oscillation or latch-up.

Use Scenario: Inductor current recirculation path in brushed DC motor drivers or solenoid control circuits.

IC Role / Device Role / Timing Role: Unidirectional current path preventing back-EMF damage to driving switches during coil de-energization.

Use Value: Low 1.30V V_F limits voltage drop across freewheel path, preserving torque response and reducing thermal stress on PCB traces.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L06S	V_RRM = 600V, t_rr = 30ns, V_F = 1.35V @ 1A - higher voltage rating, slightly faster recovery, marginally higher V_F.	Preferred where system requires 600V blocking (e.g., 400V bus with 50% derating) or tighter t_rr tolerance.	Select STTH1L06S only if 600V V_RRM is mandatory; otherwise ES1FLH offers better cost and thermal fit for 400V designs.
SB140-E3/52T	V_RRM = 40V, t_rr = 35ns, V_F = 0.55V @ 1A - much lower voltage rating but significantly lower forward drop.	Suitable only for ≤40V applications (e.g., USB PD secondary side); not interchangeable in 400V systems.	SB140-E3/52T is not a functional substitute for ES1FLH due to V_RRM mismatch; use only in low-voltage, ultra-low-loss contexts.

Compared with STTH1L06S and SB140-E3/52T, ES1FLH uniquely balances 400V blocking, 35ns speed, and AEC-Q101 compliance in Sub SMA-making it the optimal choice for cost-sensitive, thermally constrained automotive DC-DC and lighting designs requiring validated reliability.

Availability

ES1FLH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converter design, and freewheeling circuit implementation requiring stable component supply, AEC-Q101 assurance, and consistent Sub SMA footprint availability.

Supply support for ES1FLH 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 automotive, industrial, and consumer markets since 1979.

The ES1xLH series was designed specifically for high-reliability, surface-mount super fast rectification in automotive power systems-emphasizing AEC-Q101 compliance, low-profile packaging, and consistent parametric performance across voltage grades.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for ES1FLH?

The ES1FLH has a maximum repetitive peak reverse voltage (V_RRM) of 400 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version A2103), where ES1FLH is explicitly assigned V_RRM = 400 V alongside marking code "EFL". It defines the highest reverse voltage the ES1FLH can block repeatedly without breakdown under normal operating conditions.

Is ES1FLH qualified for automotive applications?

Yes, ES1FLH is AEC-Q101 qualified, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-validating ES1FLH for use in automotive power systems such as lighting, body control modules, and DC-DC converters where reliability under harsh environmental conditions is required.

What is the forward voltage (V_F) of ES1FLH at 1A and 25°C?

The forward voltage (V_F) of ES1FLH is specified as a maximum of 1.30 V at I_F = 1 A and T_J = 25°C. This value appears in the Electrical Specifications table under "ES1FLH ES1GLH" grouping and reflects worst-case conduction loss under nominal conditions-critical for thermal and efficiency calculations in ES1FLH-based designs.

Does ES1FLH have a defined reverse recovery time (t_rr)?

Yes, ES1FLH has a specified reverse recovery time (t_rr) of 35 ns maximum. Per the Electrical Specifications table, this is measured under standardized conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A. The 35 ns t_rr confirms ES1FLH's classification as a super fast rectifier and directly impacts switching loss and EMI in high-frequency power stages using ES1FLH.

What package type does ES1FLH use, and is it compatible with automated assembly?

ES1FLH uses the Sub SMA package-a low-profile, surface-mount plastic package with matte tin-plated leads. The datasheet explicitly states it is "ideal for automated placement" and compliant with J-STD-002 solderability standards. Its 0.019g weight and UL 94V-0 molding compound further support high-yield, lead-free reflow processes in ES1FLH-based production lines.

ES1FLH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 300 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:: 5 µA @ 300 V

Capacitance @ Vr, F:: 8pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: Sub SMA

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

ES1FLH FAQ

1.How can I place an order for ES1FLH through Aetrix?

Please submit a Request for Quotation (RFQ) for ES1FLH 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 ES1FLH reliable?

The price and inventory of ES1FLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1FLH is usually 5 days.

3.What payment methods are accepted for ES1FLH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1FLH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ES1FLH?

ES1FLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ES1FLH 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 ES1FLH?

For technical support, including ES1FLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1FLH requirements.

6.How does Aetrix verify that ES1FLH is sourced from the original manufacturer or authorized distributors?

All ES1FLH 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 ES1FLH meets industry standards.

7.What is the process for return or replacement of ES1FLH?

All ES1FLH units undergo pre-shipment inspection (PSI). If there is an issue with ES1FLH, 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 ES1FLH part is unused and in its original packaging.

Return procedure for ES1FLH:

1.Submit a request within 90 days.

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

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