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

Taiwan Semiconductor Corporation S1MF-T

Name: S1MF-T
Brand: Taiwan Semiconductor Corporation
SKU: S1MF-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S1MF-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: S1MF-T.pdf

Description:: 1A, 1000V, STANDARD RECOVERY REC

Quantity:: RFQ Add To RFQ list

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Inventory:4,846

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Product details

Overview

S1MF-T from Taiwan Semiconductor is a 1000 V, 1 A standard surface-mount silicon rectifier diode in SMAF package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 30 A surge current capability; used in DC-DC converters and switching-mode inverters requiring high-voltage rectification.

For engineers reviewing the S1MF-T datasheet, S1MF-T pinout, S1MF-T application, or S1MF-T equivalent, key selection criteria include repetitive peak reverse voltage (1000 V), forward voltage (1.10 V max at 1 A/25°C), thermal resistance (R_θJA = 89 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance.

Technical Context

The S1MF-T is a single-die, unidirectional standard recovery rectifier with cathode-band polarity marking and matte tin-plated leads solderable per J-STD-002. Its glass-passivated junction ensures stable reverse characteristics across –55 to +150 °C operating range.

Thermal performance is characterized on a 5 mm × 5 mm copper pad PCB: R_θJL = 15 °C/W and R_θJC = 22 °C/W confirm efficient heat transfer from junction to lead and case, supporting continuous 1 A conduction under derated ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - Maximum repetitive reverse voltage the device blocks without breakdown; defines high-voltage DC-DC and inverter stage compatibility.
I_F	1 A - Continuous average forward current rating at T_A = 25°C; sets baseline conduction capacity for power supply output stages.
I_FSM	30 A - Non-repetitive surge current (8.3 ms half-sine); enables robustness against startup transients and load dump events.
V_F	1.10 V max at 1 A / 25°C - Forward voltage drop directly impacts conduction loss and thermal design margin in rectifier circuits.
R_θJA	89 °C/W - Junction-to-ambient thermal resistance on standard test board; determines required PCB copper area for thermal management.
I_R	5 µA max at 1000 V / 25°C - Low reverse leakage preserves efficiency in high-impedance hold-up or sensing paths.
T_J max	+150 °C - Maximum junction temperature; allows operation in industrial environments with limited airflow or elevated ambient.

Pinout & Package

Package: SMAF (Surface Mount Axial Flat) - molded plastic case with matte tin-plated gull-wing leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.035 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of AC input or transformer secondary; requires adequate trace width for 1 A RMS.
Cathode	Forward current exit point; marked by band	Connected to output capacitor or filter choke; polarity must be observed to prevent reverse breakdown in circuit layout.

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable reverse leakage and long-term reliability under humidity and thermal cycling stress.
Low I_R (≤5 µA @ 25°C)	Minimizes standby power loss in offline SMPS and improves voltage hold-up time in energy-limited systems.
J-STD-020 Level 1 MSL	Enables direct placement without baking; reduces manufacturing overhead in high-volume SMT lines.
RoHS & halogen-free	Meets IEC 61249-2-21 and global environmental compliance requirements for industrial and consumer end equipment.
150°C max junction temperature	Supports operation in enclosed enclosures or near heat-generating components without forced cooling.

Applications

DC-DC Converter Output Rectification	Switching Inverter DC Link
Use Scenario: High-efficiency isolated flyback or forward converter output stage delivering regulated 12–48 V DC to industrial control modules. IC Role / Device Role / Timing Role: Standard recovery rectifier conducting unidirectional current during transformer secondary demagnetization phase. Use Value: 1000 V V_RRM provides margin against reflected voltage spikes; 1.10 V V_F limits conduction loss at 1 A load.	Use Scenario: DC bus rectification in three-phase motor drive inverters where line-to-line voltage peaks exceed 700 V. IC Role / Device Role / Timing Role: Freewheeling path for inductive load current during PWM dead-time intervals. Use Value: 30 A I_FSM withstands short-circuit current surges; low I_R prevents bus voltage drift during idle periods.
AC-DC Adapter Input Bridge	General-Purpose HV Filtering
Use Scenario: Compact 230 V AC input rectification in Class II wall adapters powering IoT gateways and smart sensors. IC Role / Device Role / Timing Role: Single-diode element in full-wave bridge configuration replacing discrete DIP packages. Use Value: SMAF footprint saves >60% board area vs. DO-41; RoHS/halogen-free compliance meets CE and REACH mandates.	Use Scenario: EMI filter snubber network and bias supply clamping in telecom power supplies operating up to 1000 V transient conditions. IC Role / Device Role / Timing Role: Voltage clamp and leakage-sensitive blocking element in RC damping networks. Use Value: 7 pF junction capacitance minimizes high-frequency coupling; 150 µA I_R max at 125°C maintains accuracy over temperature.

DC-DC Converter Output Rectification

Switching Inverter DC Link

Use Scenario: High-efficiency isolated flyback or forward converter output stage delivering regulated 12–48 V DC to industrial control modules.

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

Use Value: 1000 V V_RRM provides margin against reflected voltage spikes; 1.10 V V_F limits conduction loss at 1 A load.

Use Scenario: DC bus rectification in three-phase motor drive inverters where line-to-line voltage peaks exceed 700 V.

IC Role / Device Role / Timing Role: Freewheeling path for inductive load current during PWM dead-time intervals.

Use Value: 30 A I_FSM withstands short-circuit current surges; low I_R prevents bus voltage drift during idle periods.

AC-DC Adapter Input Bridge

General-Purpose HV Filtering

Use Scenario: Compact 230 V AC input rectification in Class II wall adapters powering IoT gateways and smart sensors.

IC Role / Device Role / Timing Role: Single-diode element in full-wave bridge configuration replacing discrete DIP packages.

Use Value: SMAF footprint saves >60% board area vs. DO-41; RoHS/halogen-free compliance meets CE and REACH mandates.

Use Scenario: EMI filter snubber network and bias supply clamping in telecom power supplies operating up to 1000 V transient conditions.

IC Role / Device Role / Timing Role: Voltage clamp and leakage-sensitive blocking element in RC damping networks.

Use Value: 7 pF junction capacitance minimizes high-frequency coupling; 150 µA I_R max at 125°C maintains accuracy over temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06S	600 V V_RRM, 1.05 V V_F max @ 1 A, same SMAF package	Limited to ≤600 V systems; lower forward drop improves efficiency at light loads	Select when system peak reverse voltage ≤600 V and lowest possible conduction loss is prioritized
ES1J	600 V V_RRM, 1.7 A I_F, same SMAF package, faster recovery (~50 ns)	Higher current rating but lower voltage rating; suited for higher-frequency switching topologies	Choose for 600 V designs needing >1 A average current or faster recovery than standard rectifiers

Compared with STTH1R06S and ES1J, the S1MF-T uniquely supports 1000 V systems while maintaining industry-standard SMAF mounting and low leakage-making it the only option among the three for universal-input offline SMPS and industrial DC link applications requiring full 1 kV margin.

Availability

S1MF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and general-purpose high-voltage rectification requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for S1MF-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 industrial, computing, and consumer markets since 1979.

The S1MF-T belongs to TSC's S1x-F series of standard surface-mount rectifiers, designed specifically for cost-sensitive, high-reliability power conversion applications where voltage margin, thermal stability, and automated assembly compatibility are critical.

FAQ

What is the maximum repetitive peak reverse voltage rating for the S1MF-T?

The S1MF-T has a maximum repetitive peak reverse voltage (V_RRM) rating of 1000 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version B2103), where S1MF-T is explicitly listed with V_RRM = 1000 V. It defines the highest reverse voltage the S1MF-T can block continuously without avalanche breakdown under normal operating conditions.

Does the S1MF-T have a specified forward voltage at 1 A and 125°C?

Yes, the S1MF-T has a maximum forward voltage (V_F) of 0.93 V at 1 A and 125°C, per the Electrical Specifications table in the Taiwan Semiconductor datasheet. This parameter is critical for thermal modeling in high-temperature environments, and the S1MF-T's reduced V_F at elevated temperature-compared to its 1.10 V max at 25°C-reflects positive temperature coefficient behavior typical of silicon rectifiers.

Is the S1MF-T compatible with lead-free reflow soldering processes?

Yes, the S1MF-T features matte tin-plated leads compliant with J-STD-002 for solderability, and its SMAF package is rated for moisture sensitivity level 1 per J-STD-020-meaning it can be placed directly into lead-free reflow without pre-baking. The device supports peak reflow temperatures up to 260°C, consistent with standard Pb-free process profiles used in modern SMT lines.

What is the junction-to-ambient thermal resistance (R_θJA) of the S1MF-T, and under what conditions is it measured?

The S1MF-T has a junction-to-ambient thermal resistance (R_θJA) of 89 °C/W, measured on a standard test board with a 5 mm × 5 mm copper pad per the Thermal Performance section of the datasheet. This value applies to natural convection conditions and serves as the baseline for estimating junction temperature rise (ΔT_J = R_θJA × P_DISS) in PCB-level thermal design.

How does the reverse leakage current of the S1MF-T change between 25°C and 125°C?

The S1MF-T's reverse leakage current (I_R) increases from ≤5 µA at 25°C to ≤150 µA at 125°C under rated reverse voltage (1000 V), as specified in the Electrical Specifications table. This 30× increase reflects intrinsic silicon behavior and must be accounted for in high-temperature hold-up or bias networks where leakage-induced voltage droop could affect regulation stability.

S1MF-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):: 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:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 7pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAF

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

S1MF-T FAQ

1.How can I place an order for S1MF-T through Aetrix?

Please submit a Request for Quotation (RFQ) for S1MF-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 S1MF-T reliable?

The price and inventory of S1MF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MF-T is usually 5 days.

3.What payment methods are accepted for S1MF-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MF-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S1MF-T?

S1MF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S1MF-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 S1MF-T?

For technical support, including S1MF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MF-T requirements.

6.How does Aetrix verify that S1MF-T is sourced from the original manufacturer or authorized distributors?

All S1MF-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 S1MF-T meets industry standards.

7.What is the process for return or replacement of S1MF-T?

All S1MF-T units undergo pre-shipment inspection (PSI). If there is an issue with S1MF-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 S1MF-T part is unused and in its original packaging.

Return procedure for S1MF-T:

1.Submit a request within 90 days.

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

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