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

Taiwan Semiconductor Corporation S1DFS

Name: S1DFS
Brand: Taiwan Semiconductor Corporation
SKU: S1DFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1DFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S1DFS.pdf

Description:: DIODE GEN PURP 200V 1A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

S1DFS from Taiwan Semiconductor is a 1 A, 200 V repetitive peak reverse voltage (V_RRM) surface-mount standard rectifier in SOD-128 package, featuring glass-passivated junction, 30 A surge capability (I_FSM), and 150 °C maximum junction temperature - used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S1DFS datasheet, S1DFS pinout, S1DFS application, or S1DFS equivalent, key selection criteria include forward voltage at 1 A (max 1.1 V @ 25 °C), reverse leakage (≤1 µA @ 25 °C), thermal resistance (R_θJL = 29 °C/W), and SOD-128 mechanical compatibility with automated placement.

Technical Context

The S1DFS is a single-die, silicon planar epitaxial standard recovery rectifier optimized for general-purpose AC/DC and DC/DC conversion. Its glass-passivated junction ensures stable reverse characteristics and moisture resistance (J-STD-020 Level 1).

Thermal performance is defined with PCB mounting on a 5 mm × 5 mm copper pad: R_θJA = 82 °C/W, R_θJC = 30 °C/W, enabling reliable operation up to 150 °C junction temperature under rated DC current.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum repetitive reverse blocking voltage; defines safe operating range in bridge or freewheeling configurations
I_F	1 A continuous - average forward current rating at 75 °C lead temperature; determines steady-state power handling
I_FSM	30 A (8.3 ms half-sine) - surge current capability; supports inrush and transient overload without failure
V_F @ 1 A, 25 °C	≤1.1 V - forward voltage drop directly impacts conduction loss and thermal design in high-efficiency SMPS
I_R @ V_RRM, 25 °C	≤1 µA - low reverse leakage preserves efficiency in high-impedance bias networks and standby circuits
T_J max	+150 °C - maximum junction temperature enables operation in thermally constrained industrial environments
C_J	9 pF @ 4 V - junction capacitance affects high-frequency switching noise and EMI filter design

Pinout & Package

Package: SOD-128 - molded surface-mount case with matte tin-plated leads, UL 94V-0 rated compound, cathode polarity indicated by band, weight ≈0.027 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of AC input or switch node; must withstand full I_F and I_FSM
Cathode	Forward current exit / reverse-blocking terminal	Connected to output rail or higher-potential node; carries full V_RRM when reverse-biased

Key Features

Feature	Design Value
Glass-passivated junction	Enhances long-term reliability and humidity resistance per J-STD-020 Level 1, critical for automotive and industrial reflow environments
SOD-128 package	Enables high-density PCB layout and compatibility with standard pick-and-place equipment; meets JEDEC outline MO-275
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives, supporting environmentally regulated end markets
Junction-to-lead thermal resistance	R_θJL = 29 °C/W - enables efficient heat transfer to PCB copper, reducing thermal derating in compact designs

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Standard recovery rectifier conducting unidirectional current during transformer secondary voltage polarity. Use Value: Low V_F (≤1.1 V) minimizes conduction loss; 200 V V_RRM safely handles reflected voltage spikes in 12–24 V output designs.	Use Scenario: Freewheeling diode across inductive loads in motor drive inverters or UPS systems. IC Role / Device Role / Timing Role: Provides path for inductive current decay during MOSFET/IGBT turn-off. Use Value: 30 A I_FSM withstands short-duration load transients; 150 °C T_J max supports operation near power semiconductors.
General-Purpose Power Supply	AC Adapter Input Stage
Use Scenario: Output rectification in non-isolated buck-derived or linear-regulated supplies for consumer electronics. IC Role / Device Role / Timing Role: Converts pulsating DC from smoothing capacitor into stable DC bus. Use Value: SOD-128 footprint allows cost-effective, space-efficient layout; ≤1 µA I_R prevents significant standby power drain.	Use Scenario: Bridge rectifier leg in universal-input (85–265 VAC) wall adapters. IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC input; blocks during negative half-cycle. Use Value: 200 V V_RRM provides margin over 1.414 × 120 VAC peak (170 V); glass passivation ensures stability across humid environments.

DC-DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs.

IC Role / Device Role / Timing Role: Standard recovery rectifier conducting unidirectional current during transformer secondary voltage polarity.

Use Value: Low V_F (≤1.1 V) minimizes conduction loss; 200 V V_RRM safely handles reflected voltage spikes in 12–24 V output designs.

Use Scenario: Freewheeling diode across inductive loads in motor drive inverters or UPS systems.

IC Role / Device Role / Timing Role: Provides path for inductive current decay during MOSFET/IGBT turn-off.

Use Value: 30 A I_FSM withstands short-duration load transients; 150 °C T_J max supports operation near power semiconductors.

General-Purpose Power Supply

AC Adapter Input Stage

Use Scenario: Output rectification in non-isolated buck-derived or linear-regulated supplies for consumer electronics.

IC Role / Device Role / Timing Role: Converts pulsating DC from smoothing capacitor into stable DC bus.

Use Value: SOD-128 footprint allows cost-effective, space-efficient layout; ≤1 µA I_R prevents significant standby power drain.

Use Scenario: Bridge rectifier leg in universal-input (85–265 VAC) wall adapters.

IC Role / Device Role / Timing Role: Conducts during positive half-cycle of AC input; blocks during negative half-cycle.

Use Value: 200 V V_RRM provides margin over 1.414 × 120 VAC peak (170 V); glass passivation ensures stability across humid environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR120	V_RRM = 200 V, I_F = 1 A, but ultrafast recovery (t_rr = 75 ns) vs. standard recovery (~2 µs)	Better suited for high-frequency SMPS (>100 kHz); higher V_F (1.3 V) increases conduction loss	Select MUR120 only if reduced switching loss outweighs higher V_F; S1DFS preferred for cost-sensitive, <50 kHz designs
Vishay VS-1EWH02-M3	V_RRM = 200 V, I_F = 1 A, same SOD-128 package, but higher V_F (1.15 V max) and lower I_FSM (25 A)	Compatible footprint and voltage rating, but reduced surge margin and slightly higher conduction loss	VS-1EWH02-M3 is viable where surge stress is minimal; S1DFS offers superior I_FSM and thermal robustness

Compared with MUR120 and VS-1EWH02-M3, the S1DFS delivers optimal balance of surge resilience (30 A), low forward drop (≤1.1 V), and thermal performance (R_θJL = 29 °C/W), making it especially suitable for cost-constrained, medium-frequency power conversion where reliability under transient stress is critical.

Availability

S1DFS is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and general-purpose power supplies requiring stable component supply and consistent SOD-128 packaging.

Supply support for S1DFS 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 industrial, computing, and consumer markets since 1979.

The S1DFS belongs to TSC's S1xFS standard rectifier family, designed specifically for high-reliability, cost-optimized AC/DC and DC/DC power conversion in space-constrained surface-mount applications.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S1DFS?

The S1DFS has a V_RRM of 200 V, verified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating defines the highest reverse voltage the device can block repeatedly without breakdown and is confirmed across all electrical test conditions at 25 °C ambient.

Does the S1DFS have a specified forward voltage at 1 A and 125 °C?

Yes, the S1DFS forward voltage is specified as ≤0.95 V at I_F = 1.0 A and T_J = 125 °C, per the Electrical Specifications table. This value is critical for thermal modeling in high-temperature environments and confirms stable conduction performance under elevated junction conditions.

Is the S1DFS RoHS and halogen-free compliant?

Yes, the S1DFS is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. This compliance is verified through material declarations and applies to all units shipped under ordering code S1DFS.

What is the thermal resistance from junction to lead (R_θJL) for the S1DFS?

The S1DFS has a typical junction-to-lead thermal resistance (R_θJL) of 29 °C/W, measured with the device mounted on a 5 mm × 5 mm copper pad per JEDEC standards. This value is essential for calculating temperature rise under DC load and is confirmed in the Thermal Performance section of the datasheet.

What marking code appears on the S1DFS device body?

The S1DFS is marked with "S1DFS" on its top surface, as shown in the Marking Diagram section of the datasheet. This exact marking distinguishes it from other variants in the S1xFS family (e.g., S1GFS, S1JFS) and ensures traceability to its 200 V V_RRM specification.

S1DFS 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:: 1.1 V @ 1 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 200 V

Capacitance @ Vr, F:: 9pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

S1DFS FAQ

1.How can I place an order for S1DFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S1DFS 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 S1DFS reliable?

The price and inventory of S1DFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1DFS is usually 5 days.

3.What payment methods are accepted for S1DFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1DFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1DFS?

S1DFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1DFS 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 S1DFS?

For technical support, including S1DFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1DFS requirements.

6.How does Aetrix verify that S1DFS is sourced from the original manufacturer or authorized distributors?

All S1DFS 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 S1DFS meets industry standards.

7.What is the process for return or replacement of S1DFS?

All S1DFS units undergo pre-shipment inspection (PSI). If there is an issue with S1DFS, 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 S1DFS part is unused and in its original packaging.

Return procedure for S1DFS:

1.Submit a request within 90 days.

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

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