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

Taiwan Semiconductor Corporation ES1DFS

Name: ES1DFS
Brand: Taiwan Semiconductor Corporation
SKU: ES1DFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ES1DFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: ES1DFS.pdf

Description:: DIODE GEN PURP 200V 1A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:34,745

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Product details

Overview

ES1DFS from Taiwan Semiconductor is a 1 A, 200 V super fast surface-mount rectifier in SOD-128 package, featuring 35 ns reverse recovery time, 0.95 V max forward voltage at 1.0 A/25°C, and 30 A surge current capability. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the ES1DFS datasheet, ES1DFS pinout, ES1DFS application, or ES1DFS equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, low thermal resistance (R_θJL = 28 °C/W), and verified performance across -55°C to +150°C junction temperature range.

Technical Context

The ES1DFS uses a single-die, glass-passivated silicon junction optimized for high-speed switching with minimal stored charge. Its 35 ns trr and low CJ (18 pF at 1 MHz, 4 V) support operation in DC–DC converters up to several hundred kHz.

Thermally, it delivers R_θJL = 28 °C/W and R_θJA = 67 °C/W on a 5 mm × 5 mm Cu pad, enabling reliable 1 A continuous conduction in compact layouts without forced airflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or buck output stages
I_F	1 A - continuous forward current rating; supports typical 5–12 V/1 A SMPS outputs
t_rr	35 ns - reverse recovery time; enables efficient operation above 200 kHz switching frequencies
V_F (max)	0.95 V @ 1.0 A, 25°C - low conduction loss; reduces heat generation vs. standard rectifiers
I_FSM	30 A @ 8.3 ms - surge withstand capability; handles startup inrush and transient overloads
R_θJL	28 °C/W - junction-to-lead thermal resistance; allows direct PCB copper thermal path for passive cooling
C_J	18 pF @ 1 MHz, 4 V - low junction capacitance; minimizes switching noise and EMI in high-dV/dt circuits

Pinout & Package

Package: SOD-128 - low-profile, surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, and cathode band polarity marking.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck, transformer secondary center-tap)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output filter capacitor positive rail or load return

Key Features

Feature	Design Value
Glass passivated junction	Ensures long-term reliability and stable leakage current (<1 µA @ 25°C) under humid or thermally cycling conditions
Super fast recovery (35 ns)	Reduces switching losses and ringing in high-frequency SMPS, improving efficiency over standard FR/UF diodes
Low profile SOD-128 package	Enables dense PCB layouts with 1.1 mm max height; compatible with automated reflow and AOI inspection
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS directives; suitable for consumer and industrial end-equipment compliance

Applications

DC–DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated 5–24 V, 1 A DC–DC modules using active clamp or synchronous topology. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 0.95 V V_F limits conduction loss to <0.95 W; 35 ns t_rr prevents reverse recovery shoot-through in hard-switched designs.	Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in 200 V-class inverters. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during MOSFET off-time to clamp inductive kickback. Use Value: 200 V V_RRM safely blocks inverter bus voltage spikes; 30 A I_FSM absorbs short-circuit energy without failure.
AC–DC Adapter Secondary Rectifier	Industrial Power Supply Snubber Diode
Use Scenario: Output rectification in universal-input (90–264 VAC), 12 V/1 A wall adapters with flyback topology. IC Role / Device Role / Timing Role: Converts transformer secondary AC waveform into smoothed DC for linear post-regulation or USB-PD interface. Use Value: 150°C T_JMAX ensures margin under sealed enclosure thermal stress; SOD-128 footprint simplifies layout versus DO-214AA.	Use Scenario: Clamp diode in RCD snubber networks across primary-side MOSFETs in 200 V-rated industrial SMPS. IC Role / Device Role / Timing Role: Rapidly conducts snubber capacitor discharge pulse to limit MOSFET V_DS overshoot during turn-off. Use Value: 35 ns t_rr and low Q_rr minimize snubber energy loss; 28 °C/W R_θJL enables direct mounting to heatsink pad.

DC–DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated 5–24 V, 1 A DC–DC modules using active clamp or synchronous topology.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 0.95 V V_F limits conduction loss to <0.95 W; 35 ns t_rr prevents reverse recovery shoot-through in hard-switched designs.

Use Scenario: Freewheeling path for inductive loads (e.g., motor windings, solenoids) in 200 V-class inverters.

IC Role / Device Role / Timing Role: Provides low-loss recirculation path during MOSFET off-time to clamp inductive kickback.

Use Value: 200 V V_RRM safely blocks inverter bus voltage spikes; 30 A I_FSM absorbs short-circuit energy without failure.

AC–DC Adapter Secondary Rectifier

Industrial Power Supply Snubber Diode

Use Scenario: Output rectification in universal-input (90–264 VAC), 12 V/1 A wall adapters with flyback topology.

IC Role / Device Role / Timing Role: Converts transformer secondary AC waveform into smoothed DC for linear post-regulation or USB-PD interface.

Use Value: 150°C T_JMAX ensures margin under sealed enclosure thermal stress; SOD-128 footprint simplifies layout versus DO-214AA.

Use Scenario: Clamp diode in RCD snubber networks across primary-side MOSFETs in 200 V-rated industrial SMPS.

IC Role / Device Role / Timing Role: Rapidly conducts snubber capacitor discharge pulse to limit MOSFET V_DS overshoot during turn-off.

Use Value: 35 ns t_rr and low Q_rr minimize snubber energy loss; 28 °C/W R_θJL enables direct mounting to heatsink pad.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02	Same 1 A / 200 V rating; 30 ns t_rr, slightly lower V_F (0.85 V typ @ 1 A); TO-277 package	TO-277 has higher thermal mass but larger footprint than SOD-128; less suitable for ultra-thin designs	Select STTH1R02 when board-level thermal mass improves reliability under sustained 1 A load
ON Semi MUR120	1 A / 200 V; 60 ns t_rr, higher V_F (1.1 V max); same SOD-128 package	Slower recovery increases switching loss above 100 kHz; acceptable in lower-frequency flybacks	Choose MUR120 only if cost priority outweighs efficiency and EMI targets in <100 kHz designs

Compared with STTH1R02 and MUR120, the ES1DFS offers optimal balance of speed (35 ns), low V_F, and compact SOD-128 packaging-making it preferred for space-constrained, high-efficiency 200 V rectification where thermal path design leverages its 28 °C/W R_θJL.

Availability

ES1DFS is available at Aetrix Electronics and suitable for DC–DC converter output rectification, switching mode inverter freewheeling, and industrial power supply snubber applications requiring stable component supply and consistent parametric performance across production lots.

Supply support for ES1DFS 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 ES1BFS–ES1JFS family was designed specifically for high-frequency, high-reliability rectification in compact power supplies-emphasizing fast recovery, low thermal resistance, and robust JEDEC-compliant packaging.

FAQ

What is the maximum junction temperature rating for ES1DFS?

The ES1DFS has a maximum junction temperature (T_JMAX) of +150°C, validated per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating applies under continuous operation with proper PCB thermal design-specifically a 5 mm × 5 mm copper pad-as confirmed in the thermal performance section. Derating curves show usable current down to 0.5 A at 125°C ambient, ensuring robustness in enclosed industrial environments. The ES1DFS must not exceed this limit to maintain reliability and parametric stability.

Does ES1DFS have a specified reverse recovery time, and how is it measured?

Yes, the ES1DFS specifies a reverse recovery time (t_rr) of ≤35 ns, measured under standardized conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, per the Electrical Specifications table. This value reflects actual device behavior-not typical or guaranteed-and is critical for predicting switching loss in high-frequency topologies. The ES1DFS achieves this via optimized carrier lifetime control in its super fast silicon junction, distinguishing it from standard or fast recovery alternatives.

What is the forward voltage drop of ES1DFS at full rated current and elevated temperature?

At 1.0 A forward current and 125°C junction temperature, the ES1DFS exhibits a maximum forward voltage (V_F) of 0.81 V, as specified in the Electrical Specifications table. This value is 14% lower than its 25°C counterpart (0.95 V), demonstrating beneficial negative temperature coefficient behavior. Designers can rely on this data for accurate thermal modeling in high-ambient applications, since the ES1DFS maintains low conduction loss even under thermal stress.

Is ES1DFS compatible with lead-free reflow soldering processes?

Yes, the ES1DFS features matte tin-plated leads qualified per J-STD-002 for solderability and complies with moisture sensitivity level 1 per J-STD-020-meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. Its SOD-128 package supports standard lead-free reflow profiles (peak 260°C), and the UL 94V-0 molding compound ensures no delamination or popcorning. These attributes make ES1DFS fully compatible with modern high-volume manufacturing flows.

How does the junction capacitance of ES1DFS affect high-frequency circuit performance?

The ES1DFS has a typical junction capacitance (C_J) of 18 pF at 1 MHz and 4 V reverse bias. This low value minimizes displacement current during rapid voltage transitions, reducing EMI generation and gate drive loading in half-bridge or LLC resonant circuits. When used in snubber or clamp roles, this C_J contributes predictably to timing constants-verified in the Characteristics Curves (Fig.2). Designers should account for this fixed 18 pF in layout parasitic simulations, as it directly impacts ringing frequency in high-dV/dt nodes.

ES1DFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

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:: 1 µA @ 200 V

Capacitance @ Vr, F:: 18pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

ES1DFS FAQ

1.How can I place an order for ES1DFS through Aetrix?

Please submit a Request for Quotation (RFQ) for ES1DFS 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 ES1DFS reliable?

The price and inventory of ES1DFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ES1DFS is usually 5 days.

3.What payment methods are accepted for ES1DFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ES1DFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ES1DFS?

ES1DFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ES1DFS 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 ES1DFS?

For technical support, including ES1DFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ES1DFS requirements.

6.How does Aetrix verify that ES1DFS is sourced from the original manufacturer or authorized distributors?

All ES1DFS 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 ES1DFS meets industry standards.

7.What is the process for return or replacement of ES1DFS?

All ES1DFS units undergo pre-shipment inspection (PSI). If there is an issue with ES1DFS, 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 ES1DFS part is unused and in its original packaging.

Return procedure for ES1DFS:

1.Submit a request within 90 days.

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

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