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Taiwan Semiconductor Corporation ES1DF-T
- Part No.:
- ES1DF-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
ES1DF-T.pdf
- Description:
- 35NS, 1A, 200V, SUPER FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:7,390
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Product details
Overview
ES1DF-T from Taiwan Semiconductor is a 1 A, 200 V super fast surface-mount rectifier in SMAF package, featuring 35 ns reverse recovery time, 0.87 V forward voltage at 1.0 A/25°C, and 5 µA max reverse leakage at 25°C. It serves as a freewheeling or output rectifier in DC-DC converters and switching-mode inverters.
For engineers reviewing the ES1DF-T datasheet, ES1DF-T pinout, ES1DF-T application, or ES1DF-T equivalent, key selection criteria include repetitive peak reverse voltage (200 V), surge current capability (30 A @ 8.3 ms), thermal resistance (RθJL = 15 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance.
Technical Context
The ES1DF-T employs a single-die, glass-passivated PN junction optimized for high-speed switching in power conversion circuits. Its 35 ns reverse recovery time and low 20 pF junction capacitance at 1 MHz / 4 V enable efficient operation in 100 kHz–500 kHz SMPS topologies.
Thermal performance is characterized with RθJL = 15 °C/W and RθJA = 89 °C/W on a 5 mm × 5 mm Cu pad PCB - confirming suitability for compact, thermally constrained layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or buck-boost secondary-side rectification |
| IF | 1 A continuous - average forward current rating at TA = 25°C; derates to ~0.6 A at 100°C ambient per curve data |
| trr | 35 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables reduced switching losses vs. standard rectifiers |
| VF | 0.87 V max @ 1.0 A / 25°C - low conduction loss improves efficiency in low-voltage output rails (e.g., 3.3 V, 5 V) |
| IR | 5 µA max @ 25°C - low leakage preserves hold-up energy in standby mode and reduces no-load power draw |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance supports direct PCB copper pad heat sinking without heatsink |
| CJ | 20 pF @ 1 MHz / 4 V - limits capacitive coupling noise and EMI generation in high-frequency switching nodes |
Pinout & Package
Package: SMAF (Surface Mount Axial Flat) - molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity indicated by cathode band, weight 0.035 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to transformer secondary or switch node; accepts up to 1 A continuous, 30 A surge |
| Cathode | Forward current output / reverse voltage reference | Connected to output capacitor or load; blocks up to 200 V reverse; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling; meets J-STD-020 moisture sensitivity level 1 |
| Super fast recovery (35 ns) | Reduces reverse recovery charge (Qrr) and associated switching losses in high-frequency converters |
| Low VF (0.87 V @ 1 A) | Lowers conduction loss by ~15% vs. comparable 1 A Schottky diodes rated >30 V, improving light-load efficiency |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for consumer and industrial end-equipment |
| SMAF package | Enables automated placement (JEDEC MS-012 compatible); footprint matches industry-standard SOD-123 but with lower profile |
Applications
| DC-DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated 5 V / 3 A flyback converter powering industrial I/O modules. IC Role / Device Role / Timing Role: Unidirectional current path converting transformer AC output to regulated DC; handles 100–300 kHz switching transitions. Use Value: 35 ns trr minimizes voltage overshoot during turn-off, reducing snubber losses and EMI filter size. | Use Scenario: Freewheeling path across inductive motor windings in 24 V BLDC inverter half-bridge stage. IC Role / Device Role / Timing Role: Provides low-loss return path for inductive kickback current during MOSFET off-time. Use Value: 0.87 V VF limits conduction loss during extended freewheeling periods, improving thermal margin at 100% duty cycle. |
| AC-DC Adapter Secondary Rectifier | USB-C PD Power Delivery Clamp |
Use Scenario: Output rectifier in 12 V / 2.5 A adapter for PoE-powered access points. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to stable DC; operates continuously under full load. Use Value: RθJL = 15 °C/W allows direct thermal coupling to PCB copper, eliminating need for thermal vias in cost-sensitive designs. | Use Scenario: Reverse-polarity protection and overvoltage clamp in 20 V USB-C PD sink circuitry. IC Role / Device Role / Timing Role: Blocks reverse current while clamping transient surges up to 200 V peak. Use Value: 5 µA max IR at 25°C ensures minimal standby current drain in always-on USB-C port controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02UF | VRRM = 200 V, IF = 1 A, trr = 30 ns, VF = 0.92 V @ 1 A - slightly faster but higher forward drop | Higher VF increases conduction loss in low-VOUT designs; identical SMAF-compatible footprint | Prefer when ultra-low trr dominates over efficiency at light loads |
| ON Semi MUR120 | VRRM = 200 V, IF = 1 A, trr = 50 ns, VF = 0.89 V @ 1 A - slower recovery, similar VF | Higher Qrr increases switching loss above 200 kHz; TO-220AC package requires larger board area | Prefer for legacy through-hole designs or where thermal mass outweighs speed requirements |
Compared with STTH1R02UF and MUR120, the ES1DF-T delivers optimal balance of low VF, sub-40 ns trr, and compact SMAF packaging - making it ideal for space-constrained, high-efficiency 100–300 kHz DC-DC and inverter designs requiring <1 A average current.
Availability
ES1DF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for ES1DF-T 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 power management and industrial markets since 1979.
The ES1DF-T belongs to TSC's ES1x-F series of super fast rectifiers, engineered specifically for high-frequency switching power supplies where low forward voltage, fast recovery, and robust thermal performance are critical.
FAQ
What is the maximum junction temperature rating for the ES1DF-T?
The ES1DF-T has a maximum junction temperature (TJ) rating of +150°C, with operational range from –55°C to +150°C. This rating is validated under absolute maximum conditions and supports reliable operation in industrial environments where ambient temperatures reach 85°C and PCB self-heating adds up to 65°C rise - confirmed by RθJL = 15 °C/W and derating curves in the ES1DF-T datasheet.
Does the ES1DF-T have a specified reverse recovery time, and how is it measured?
Yes, the ES1DF-T specifies a reverse recovery time (trr) of 35 ns maximum. It is measured under defined conditions: forward current IF = 0.5 A, reverse current IR = 1.0 A, and reverse recovery current Irr = 0.25 A, per JEDEC standards. This value is confirmed in the Electrical Specifications table of the ES1DF-T datasheet and enables accurate loss modeling in high-frequency SMPS design.
Is the ES1DF-T compatible with lead-free reflow soldering processes?
Yes, the ES1DF-T features matte tin-plated leads compliant with J-STD-002 for solderability and is qualified for lead-free reflow profiles. Its moisture sensitivity level is rated J-STD-020 Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly - simplifying manufacturing for the ES1DF-T in high-volume SMT lines.
What is the junction capacitance of the ES1DF-T, and why does it matter?
The ES1DF-T exhibits a typical junction capacitance (CJ) of 20 pF at 1 MHz and 4.0 V reverse bias. This parameter directly impacts high-frequency switching noise and EMI generation - lower CJ reduces capacitive coupling into adjacent traces and eases EMI filter design in compact DC-DC converters using the ES1DF-T as the output rectifier.
How does the forward voltage of the ES1DF-T vary with temperature?
The ES1DF-T forward voltage decreases with rising junction temperature: 0.87 V max at 1.0 A / 25°C drops to 0.73 V max at 1.0 A / 125°C. This negative temperature coefficient helps stabilize current sharing in parallel configurations and reduces conduction loss at elevated operating temperatures - a verified behavior documented in the ES1DF-T Electrical Specifications table.
ES1DF-T 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):
- 200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
ES1DF-T FAQ
1.How can I place an order for ES1DF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ES1DF-T 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 ES1DF-T reliable?
The price and inventory of ES1DF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1DF-T is usually 5 days.
3.What payment methods are accepted for ES1DF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1DF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ES1DF-T?
ES1DF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ES1DF-T 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 ES1DF-T?
For technical support, including ES1DF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1DF-T requirements.
6.How does Aetrix verify that ES1DF-T is sourced from the original manufacturer or authorized distributors?
All ES1DF-T 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 ES1DF-T meets industry standards.
7.What is the process for return or replacement of ES1DF-T?
All ES1DF-T units undergo pre-shipment inspection (PSI). If there is an issue with ES1DF-T, 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 ES1DF-T part is unused and in its original packaging.
Return procedure for ES1DF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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