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Taiwan Semiconductor Corporation ES1FL
- Part No.:
- ES1FL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
ES1FL.pdf
- Description:
- 35NS, 1A, 300V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:6,564
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Product details
Overview
ES1FL from Taiwan Semiconductor is a 1A, 400V super fast surface-mount rectifier diode in Sub SMA package, featuring 35 ns reverse recovery time, 1.30 V forward voltage at 1 A and 25°C, and 8 pF junction capacitance at 1 MHz/4 V - deployed in DC-DC converter freewheeling paths for high-frequency switching efficiency.
For engineers reviewing the ES1FL datasheet, ES1FL pinout, ES1FL application, or ES1FL equivalent, key selection criteria include peak repetitive reverse voltage (400 V), surge current rating (30 A), thermal resistance (35 °C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for automated SMT assembly.
Technical Context
The ES1FL operates as a single-die, unidirectional super fast recovery rectifier optimized for high-frequency switching power supplies. Its glass-passivated junction ensures stable reverse leakage (<5 µA at 25°C, <100 µA at 125°C) and robust thermal performance up to 150°C junction temperature.
Designed for low-profile board space constraints, the Sub SMA package supports automated placement with matte tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band on the device body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse voltage; defines safe blocking capability in flyback/freewheeling topologies |
| IF | 1 A continuous - average forward current rating; sets steady-state conduction capacity under thermal derating |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine); withstands startup/inrush transients |
| trr | 35 ns - reverse recovery time; enables operation up to ~3–5 MHz switching frequencies with low switching loss |
| VF | 1.30 V @ 1 A, 25°C - forward voltage drop; directly impacts conduction loss and thermal design margin |
| CJ | 8 pF @ 1 MHz, 4 V - junction capacitance; influences high-frequency noise coupling and snubber sizing |
| RθJL | 35 °C/W - junction-to-lead thermal resistance; critical for estimating die temperature rise under PCB copper pad heatsinking |
Pinout & Package
Package: Sub SMA - low-profile surface-mount package with two terminals (anode and cathode), cathode indicated by molded band; meets UL 94V-0, J-STD-020 Level 1, and JESD 201 Class 2 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must handle full load current and surge |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or energy storage node; sustains 400 V reverse bias during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable IR and long-term reliability under thermal cycling and humidity exposure |
| Super fast trr = 35 ns | Reduces switching losses vs. standard rectifiers (e.g., 1N4007 trr > 2 µs), enabling higher frequency designs |
| Sub SMA low-profile package | 0.019 g weight and compact footprint support dense power stage layouts and automated pick-and-place |
| J-STD-020 Level 1 moisture sensitivity | Eliminates bake requirement before reflow; compatible with standard SMT assembly lines without dry pack handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and environmental regulations for industrial and consumer end equipment |
Applications
| DC–DC Converter Freewheeling | Switch-Mode Power Supply Output Rectification |
|---|---|
Use Scenario: Freewheeling path in synchronous or non-synchronous buck converters operating at 100 kHz–1 MHz. IC Role / Device Role / Timing Role: Unidirectional current path during high-side switch off-time; blocks reverse voltage while conducting inductive current. Use Value: 35 ns trr minimizes reverse recovery charge loss; 400 V VRRM supports 24–48 V input systems with safety margin. | Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Main output rectifier converting transformer secondary AC to regulated DC; handles continuous 1 A load. Use Value: 1.30 V VF limits conduction loss to ~1.3 W at full load; Sub SMA package allows tight layout near transformer and filter caps. |
| Inverter Auxiliary Power Supply | Industrial Motor Drive Snubber Network |
Use Scenario: Auxiliary 12 V supply derived from main DC bus via isolated flyback for gate drivers and control logic. IC Role / Device Role / Timing Role: Primary rectifier in auxiliary flyback secondary winding; operates continuously at light-to-moderate load. Use Value: Low IR (<5 µA @ 25°C) prevents standby power drain; 150°C TJ max supports operation in thermally constrained enclosures. | Use Scenario: Clamp diode in RCD snubber networks across IGBTs or MOSFETs in 3-phase motor inverters. IC Role / Device Role / Timing Role: Fast turn-off clamp path absorbing inductive energy during switching transitions. Use Value: 30 A IFSM withstands transient clamping surges; 35 ns trr ensures clean voltage clamping without oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06U (STMicroelectronics) | Same 1 A / 600 V rating, but trr = 50 ns; VF = 1.35 V; TO-277 package (slightly larger than Sub SMA) | Higher VRRM allows broader input range use; slower trr increases switching loss above 500 kHz | Prefer when 600 V blocking is required and board space permits TO-277 footprint |
| MBR140 (ON Semiconductor) | Schottky diode: VF ≈ 0.55 V, but VRRM only 40 V; no reverse recovery (trr = N/A); higher IR at elevated temperature | Lower conduction loss ideal for low-VIN apps; unsuitable for 400 V blocking or high-temp reverse bias | Select only for ≤40 V circuits where ultra-low VF outweighs reverse voltage limitation |
Compared with STTH1L06U, ES1FL offers faster switching (35 ns vs. 50 ns) and smaller Sub SMA footprint; compared with MBR140, ES1FL provides 10× higher VRRM at the cost of higher VF - making ES1FL optimal for 400 V, medium-frequency, space-constrained freewheeling.
Availability
ES1FL is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, J-STD-020 Level 1 moisture handling, and RoHS-compliant SMT assembly.
Supply support for ES1FL 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 for industrial and computing markets.
The ES1AL–ES1JL series was designed specifically for high-efficiency, high-frequency switching power supplies - balancing fast recovery, low VF, and robust thermal performance in compact surface-mount packages.
FAQ
What is the maximum junction temperature rating for ES1FL?
The ES1FL has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This allows reliable operation in thermally demanding environments such as enclosed power supplies or motor drive auxiliary rails. Derating curves confirm usable current capacity down to 0.5 A at 125°C ambient with adequate PCB copper heatsinking. The ES1FL must not exceed this limit to maintain long-term reliability and parametric stability.
Does ES1FL have a specified moisture sensitivity level (MSL) for reflow soldering?
Yes, ES1FL is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and subjected to standard lead-free reflow profiles without pre-baking. This eliminates moisture-related popcorning risk and simplifies SMT line integration. The Sub SMA package construction and glass passivation contribute to this robust moisture resistance. Always verify tape-and-reel packaging integrity before use, as ES1FL ships in 10,000-unit reels.
What is the reverse recovery time (trr) of ES1FL and how is it measured?
The ES1FL reverse recovery time is 35 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Taiwan Semiconductor datasheet. This test condition reflects real-world switching behavior in hard-commutated converters. The value is typical - not guaranteed - and applies at TA = 25°C. At elevated temperatures, trr increases slightly but remains below 50 ns up to 125°C junction, supporting stable high-frequency operation in the ES1FL.
Can ES1FL replace a standard 1N4007 rectifier in a 400 V application?
No - while both handle 400 V, ES1FL is not a direct replacement for 1N4007 due to fundamental differences: ES1FL is a super fast recovery diode (trr = 35 ns) versus 1N4007's slow recovery (>2 µs), and ES1FL's VF is higher (1.30 V vs. ~1.1 V). In high-frequency circuits, ES1FL reduces switching loss; in 50/60 Hz applications, its faster recovery offers no benefit and may increase EMI. Use ES1FL only where fast recovery is required - not as a generic 1N4007 substitute.
Is ES1FL halogen-free and RoHS compliant?
Yes, ES1FL is certified halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU. The molding compound contains no brominated flame retardants, chlorine, or fluorine above threshold limits, and all homogeneous materials meet RoHS substance restrictions. This compliance is documented in Taiwan Semiconductor's material declarations and applies to all units shipped under ordering code ES1FL in Sub SMA tape-and-reel packaging.
ES1FL 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
ES1FL FAQ
1.How can I place an order for ES1FL through Aetrix?
Please submit a Request for Quotation (RFQ) for ES1FL 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 ES1FL reliable?
The price and inventory of ES1FL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1FL is usually 5 days.
3.What payment methods are accepted for ES1FL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1FL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ES1FL?
ES1FL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ES1FL 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 ES1FL?
For technical support, including ES1FL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1FL requirements.
6.How does Aetrix verify that ES1FL is sourced from the original manufacturer or authorized distributors?
All ES1FL 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 ES1FL meets industry standards.
7.What is the process for return or replacement of ES1FL?
All ES1FL units undergo pre-shipment inspection (PSI). If there is an issue with ES1FL, 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 ES1FL part is unused and in its original packaging.
Return procedure for ES1FL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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