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

Taiwan Semiconductor Corporation S1MFS

Name: S1MFS
Brand: Taiwan Semiconductor Corporation
SKU: S1MFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1MFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: S1MFS.pdf

Description:: DIODE GEN PURP 1KV 1A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:27,975

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Product details

Overview

S1MFS from Taiwan Semiconductor is a 1 A, 1000 V repetitive peak reverse voltage (V_RRM) standard surface-mount silicon rectifier diode 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 inverters.

For engineers reviewing the S1MFS datasheet, S1MFS pinout, S1MFS application, or S1MFS equivalent, key selection criteria include verified V_RRM = 1000 V, forward voltage ≤1.1 V at 1 A/25°C, reverse leakage ≤1 µA at 25°C, thermal resistance R_θJL = 29 °C/W, and SOD-128 mechanical compatibility with automated placement.

Technical Context

The S1MFS is a single-die, unidirectional standard recovery rectifier optimized for high-voltage, medium-current switching power supplies. Its glass-passivated junction ensures stable reverse blocking and moisture resistance per J-STD-020 Level 1, while matte tin-plated leads meet J-STD-002 solderability requirements.

Thermal performance is characterized on a 5 mm × 5 mm copper pad PCB: R_θJA = 82 °C/W (ambient), R_θJC = 30 °C/W (case), and R_θJL = 29 °C/W (lead), enabling reliable operation up to T_J = 150 °C under sustained 1 A DC load with appropriate board layout.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports input rectification in 800 V AC line-derived or high-bus DC-DC systems without derating
I_F	1 A continuous - rated for steady-state conduction in compact SMPS output stages
I_FSM	30 A (8.3 ms half-sine) - withstands inrush and transient surges common in offline converters
V_F	≤1.1 V @ 1 A, 25°C - limits conduction loss to <1.1 W per device at full rated current
I_R	≤1 µA @ 1000 V, 25°C - ensures low standby power loss in high-impedance hold-up circuits
T_J max	150 °C - enables operation in sealed or thermally constrained industrial enclosures
C_J	9 pF @ 4 V - minimizes capacitive coupling noise in high-frequency switching nodes

Pinout & Package

Package: SOD-128 - molded surface-mount case with cathode band polarity marking, UL 94V-0 rated compound, 0.027 g weight, and lead-free matte tin plating compliant with J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry point during forward conduction	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node)
Cathode	Current exit point during forward conduction; marked by band	Connected to output rail or filter capacitor positive terminal; defines output polarity

Key Features

Feature	Design Value
Glass passivated junction	Prevents moisture-induced degradation and ensures long-term reliability in humid environments
J-STD-020 Level 1 MSL	Zero floor-life limitation - no baking required before reflow assembly
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives for eco-sensitive industrial deployments
SOD-128 footprint	Enables high-density PCB layout and compatibility with standard pick-and-place equipment
150 °C T_J rating	Supports operation in ambient temperatures up to 105 °C with proper thermal design

Applications

Industrial DC-DC Converter	AC-DC Front-End Rectifier
Use Scenario: Isolated 48 V–12 V buck-derived converter in programmable logic controller (PLC) power module. IC Role / Device Role / Timing Role: Output rectifier handling 1 A continuous current with minimal forward drop and thermal rise. Use Value: V_F ≤ 1.1 V at 1 A reduces conduction loss to <1.1 W, easing thermal management on compact 4-layer PCB.	Use Scenario: Bridgeless PFC front-end stage in 24 V telecom rectifier with 1000 V isolation requirement. IC Role / Device Role / Timing Role: High-V_RRM leg in discrete bridge configuration for universal AC input rectification. Use Value: 1000 V V_RRM eliminates need for series-connected diodes, simplifying layout and reducing component count.
Switching Inverter Auxiliary Supply	General-Purpose HV Bias Rail
Use Scenario: Auxiliary 15 V bias supply for gate drivers in 600 V IGBT inverter stack. IC Role / Device Role / Timing Role: Input rectifier feeding linear regulator or flyback controller from auxiliary winding. Use Value: 30 A I_FSM tolerates startup surges from unloaded transformer windings without failure.	Use Scenario: Standby bias generation for microcontroller supervision circuit in high-voltage motor drive. IC Role / Device Role / Timing Role: Primary HV rectifier feeding RC-filtered Zener clamp or LDO input. Use Value: ≤1 µA reverse leakage at 25°C ensures <1 µW standby dissipation, critical for battery-backed monitoring.

Industrial DC-DC Converter

AC-DC Front-End Rectifier

Use Scenario: Isolated 48 V–12 V buck-derived converter in programmable logic controller (PLC) power module.

IC Role / Device Role / Timing Role: Output rectifier handling 1 A continuous current with minimal forward drop and thermal rise.

Use Value: V_F ≤ 1.1 V at 1 A reduces conduction loss to <1.1 W, easing thermal management on compact 4-layer PCB.

Use Scenario: Bridgeless PFC front-end stage in 24 V telecom rectifier with 1000 V isolation requirement.

IC Role / Device Role / Timing Role: High-V_RRM leg in discrete bridge configuration for universal AC input rectification.

Use Value: 1000 V V_RRM eliminates need for series-connected diodes, simplifying layout and reducing component count.

Switching Inverter Auxiliary Supply

General-Purpose HV Bias Rail

Use Scenario: Auxiliary 15 V bias supply for gate drivers in 600 V IGBT inverter stack.

IC Role / Device Role / Timing Role: Input rectifier feeding linear regulator or flyback controller from auxiliary winding.

Use Value: 30 A I_FSM tolerates startup surges from unloaded transformer windings without failure.

Use Scenario: Standby bias generation for microcontroller supervision circuit in high-voltage motor drive.

IC Role / Device Role / Timing Role: Primary HV rectifier feeding RC-filtered Zener clamp or LDO input.

Use Value: ≤1 µA reverse leakage at 25°C ensures <1 µW standby dissipation, critical for battery-backed monitoring.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06S	V_RRM = 600 V, V_F = 1.05 V @ 1 A, R_θJL = 35 °C/W, SOD-123FL package	Limited to ≤600 V systems; higher thermal resistance requires larger copper area	Select when 600 V rating suffices and SOD-123FL footprint is preferred for space-constrained layouts
ON Semi MUR1100E	V_RRM = 1000 V, V_F = 1.25 V @ 1 A, I_FSM = 25 A, DO-214AC package	Larger DO-214AC footprint; higher V_F increases conduction loss by ~0.15 W vs. S1MFS	Choose for legacy through-hole-compatible designs or where higher surge margin is not required

Compared with STTH1R06S and MUR1100E, the S1MFS uniquely combines 1000 V rating, 1.1 V max V_F, 30 A surge, and SOD-128's automated-assembly readiness - making it optimal for new high-density, high-reliability industrial SMPS designs.

Availability

S1MFS is available at Aetrix Electronics and suitable for industrial DC-DC converters, AC-DC front-end rectifiers, and switching inverter auxiliary supplies requiring stable component supply, consistent parametric performance, and full traceability across production batches.

Supply support for S1MFS 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 S1MFS belongs to TSC's S1xFS standard rectifier family, engineered specifically for cost-sensitive, high-volume switching power supplies where reliability, automated manufacturability, and tight parametric consistency are essential.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) of the S1MFS?

The S1MFS has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating applies under standard test conditions (T_A = 25°C) and defines the highest reverse voltage the S1MFS can block repeatedly without breakdown. The S1MFS is the highest-voltage variant in the S1DFS–S1MFS series.

Does the S1MFS have a glass passivated junction?

Yes, the S1MFS features a glass passivated chip junction, explicitly listed under FEATURES in the Taiwan Semiconductor documentation. This construction enhances moisture resistance and long-term reliability, supporting J-STD-020 Level 1 moisture sensitivity classification - meaning the S1MFS has unlimited floor life and requires no pre-reflow baking.

What is the forward voltage (V_F) of the S1MFS at 1 A and 25°C?

The forward voltage (V_F) of the S1MFS is guaranteed ≤1.1 V at 1 A and 25°C, per the Electrical Specifications table. The typical value is 0.99 V under those conditions. This parameter is measured using pulse testing (PW = 0.3 ms) to avoid self-heating effects, and the S1MFS maintains lower V_F (≤0.95 V) even at elevated junction temperatures (125°C).

What package type does the S1MFS use, and what are its key mechanical attributes?

The S1MFS uses the SOD-128 surface-mount package, confirmed in Mechanical Data and Ordering Information sections. Key attributes include UL 94V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002, cathode band polarity marking, and a weight of approximately 0.027 g. The SOD-128 footprint supports automated placement and offers superior thermal performance over smaller packages like SOD-123FL.

Is the S1MFS RoHS and halogen-free compliant?

Yes, the S1MFS is RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as stated in the FEATURES section of the Taiwan Semiconductor datasheet. This compliance is verified for all units shipped under ordering code S1MFS and applies to both material content and manufacturing process - confirming suitability for environmentally regulated industrial and telecom equipment.

S1MFS 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):: 1000 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 @ 1000 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

S1MFS FAQ

1.How can I place an order for S1MFS through Aetrix?

Please submit a Request for Quotation (RFQ) for S1MFS 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 S1MFS reliable?

The price and inventory of S1MFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MFS is usually 5 days.

3.What payment methods are accepted for S1MFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1MFS?

S1MFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1MFS 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 S1MFS?

For technical support, including S1MFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MFS requirements.

6.How does Aetrix verify that S1MFS is sourced from the original manufacturer or authorized distributors?

All S1MFS 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 S1MFS meets industry standards.

7.What is the process for return or replacement of S1MFS?

All S1MFS units undergo pre-shipment inspection (PSI). If there is an issue with S1MFS, 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 S1MFS part is unused and in its original packaging.

Return procedure for S1MFS:

1.Submit a request within 90 days.

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

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