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

Taiwan Semiconductor Corporation S3MB-K

Name: S3MB-K
Brand: Taiwan Semiconductor Corporation
SKU: S3MB-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S3MB-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: S3MB-K.pdf

Description:: 3A, 1000V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:4,267

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Product details

Overview

S3MB-K from Taiwan Semiconductor is a 1000 V repetitive peak reverse voltage, 3 A average forward current standard surface-mount silicon rectifier in DO-214AA (SMB) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 150°C maximum junction temperature - used in high-voltage DC-DC converters and switching inverters.

For engineers reviewing the S3MB-K datasheet, S3MB-K pinout, S3MB-K application, or S3MB-K equivalent, key selection criteria include V_RRM = 1000 V, I_F = 3 A, V_F = 0.93 V @ 3 A/25°C, I_FSM = 80 A (8.3 ms), and thermal resistance R_θJA = 78 °C/W on 10 mm × 10 mm PCB pad.

Technical Context

This single-die standard recovery rectifier operates with a typical forward voltage of 0.93 V at 3 A and 25°C, dropping to 0.87 V at 125°C - enabling stable conduction across industrial temperature ranges. Its 1000 V V_RRM rating supports primary-side rectification in offline SMPS designs up to 800 V DC bus.

The device exhibits low junction capacitance (60 pF @ 4 V, 1 MHz) and reverse leakage ≤300 µA at 125°C, supporting reliable blocking in high-frequency switching topologies. Thermal performance is characterized by R_θJL = 20 °C/W and R_θJC = 26 °C/W, confirming efficient heat transfer from die to lead and case under continuous operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	1000 V - supports rectification in 800 V DC-link applications without derating
I_F	3 A average forward current - suitable for medium-power SMPS output stages
V_F	0.93 V @ 3 A, 25°C - limits conduction loss to ~2.8 W per device at full load
I_FSM	80 A @ 8.3 ms - withstands typical AC line surge events in universal-input supplies
T_J max	+150°C - enables operation in sealed enclosures or high-ambient industrial environments
R_θJA	78 °C/W on 10 mm × 10 mm Cu pad - defines minimum PCB copper area needed for thermal compliance
C_J	60 pF @ 4 V, 1 MHz - minimizes capacitive coupling noise in high-dV/dt gate-drive or snubber circuits

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1 whisker resistance; UL 94V-0 molding compound; weight ≈ 0.090 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or bridge leg)
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to positive rail or output capacitor anode; must sustain full V_RRM

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable long-term reliability and reduced surface leakage under humid or contaminated conditions
Moisture sensitivity level 1	Eliminates bake requirement before reflow; compatible with standard SMT assembly lines
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS directives for environmentally regulated end equipment
Low I_R (≤5 µA @ 25°C)	Minimizes standby power loss in high-impedance hold-up or bias supply circuits

Applications

High-Voltage DC-DC Converter	Switching Inverter Output Stage
Use Scenario: Isolated 400–800 V input to 12–48 V output DC-DC converter in telecom power systems. IC Role / Device Role / Timing Role: Primary-side rectifier in active-clamp forward or LLC resonant topology. Use Value: 1000 V V_RRM provides 20% margin over 800 V DC bus, ensuring robustness against transients and ripple.	Use Scenario: Output rectification in three-phase motor drive inverters with 650 V IGBTs. IC Role / Device Role / Timing Role: Freewheeling diode in IGBT half-bridge legs for regenerative braking energy return. Use Value: Low V_F (0.93 V) reduces conduction loss during high-current freewheeling intervals.
Industrial SMPS Secondary Side	General-Purpose High-Voltage Rectification
Use Scenario: 24 V/5 A output stage in DIN-rail mounted industrial power supply. IC Role / Device Role / Timing Role: Output rectifier in synchronous or non-synchronous flyback converter. Use Value: 3 A I_F rating and 150°C T_J max support continuous operation in enclosed cabinets with >60°C ambient.	Use Scenario: Input rectification in AC/DC adapters rated for 230 VAC universal input. IC Role / Device Role / Timing Role: Bridge leg diode in discrete full-wave rectifier configuration. Use Value: Standard recovery speed and low leakage enable cost-effective replacement of legacy axial-leaded rectifiers.

High-Voltage DC-DC Converter

Switching Inverter Output Stage

Use Scenario: Isolated 400–800 V input to 12–48 V output DC-DC converter in telecom power systems.

IC Role / Device Role / Timing Role: Primary-side rectifier in active-clamp forward or LLC resonant topology.

Use Value: 1000 V V_RRM provides 20% margin over 800 V DC bus, ensuring robustness against transients and ripple.

Use Scenario: Output rectification in three-phase motor drive inverters with 650 V IGBTs.

IC Role / Device Role / Timing Role: Freewheeling diode in IGBT half-bridge legs for regenerative braking energy return.

Use Value: Low V_F (0.93 V) reduces conduction loss during high-current freewheeling intervals.

Industrial SMPS Secondary Side

General-Purpose High-Voltage Rectification

Use Scenario: 24 V/5 A output stage in DIN-rail mounted industrial power supply.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or non-synchronous flyback converter.

Use Value: 3 A I_F rating and 150°C T_J max support continuous operation in enclosed cabinets with >60°C ambient.

Use Scenario: Input rectification in AC/DC adapters rated for 230 VAC universal input.

IC Role / Device Role / Timing Role: Bridge leg diode in discrete full-wave rectifier configuration.

Use Value: Standard recovery speed and low leakage enable cost-effective replacement of legacy axial-leaded rectifiers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 600 V, I_F = 3 A, V_F = 0.95 V @ 3 A, faster recovery (t_rr = 50 ns)	Not suitable for 800–1000 V DC-link use; better for <600 V high-frequency PFC stages	Select only when lower V_RRM and faster recovery are required; not drop-in for S3MB-K's 1000 V role
ON Semi MUR3100	V_RRM = 1000 V, I_F = 3 A, V_F = 0.98 V @ 3 A, ultrafast recovery (t_rr = 35 ns)	Higher V_F increases conduction loss; optimized for high-frequency snubberless operation	Prefer where EMI reduction or zero-voltage switching is critical; trade-off is +0.05 V forward drop vs. S3MB-K

Compared with STTH3L06S and MUR3100, the S3MB-K delivers higher voltage margin and lower forward voltage at 1000 V rating, making it optimal for ruggedized offline rectification where standard recovery speed suffices and thermal efficiency is prioritized.

Availability

S3MB-K is available at Aetrix Electronics and suitable for high-voltage DC-DC converters, switching mode inverters, and industrial SMPS requiring stable component supply with consistent DO-214AA (SMB) packaging and RoHS/halogen-free compliance.

Supply support for S3MB-K 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 diodes, MOSFETs, and bipolar transistors since 1979.

The S3MB-K belongs to TSC's S3x series of standard surface-mount rectifiers, designed specifically for cost-sensitive, high-reliability industrial and telecom power conversion applications demanding wide V_RRM scalability and JEDEC-compliant packaging.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S3MB-K?

The S3MB-K has a V_RRM of 1000 V, verified in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version D2102). This rating allows the S3MB-K to safely block voltages up to 1000 V in repetitive AC or DC reverse-bias conditions, making it suitable for 800 V DC-link applications with adequate safety margin.

What is the forward voltage drop (V_F) of the S3MB-K at rated current?

The S3MB-K exhibits a typical forward voltage of 0.93 V at 3.0 A and 25°C, with a maximum of 1.15 V under the same conditions. At elevated temperature (125°C), V_F drops to 0.87 V (typ) / 0.99 V (max), as confirmed in the Electrical Specifications table. This behavior is critical for thermal design in high-ambient environments.

Is the S3MB-K suitable for automated SMT assembly?

Yes, the S3MB-K is explicitly designed for automated placement: it carries moisture sensitivity level 1 per J-STD-020, requires no pre-bake, and features matte tin-plated leads compliant with J-STD-002 solderability. Its DO-214AA (SMB) footprint is widely supported in pick-and-place libraries and reflow profiles.

What is the junction-to-ambient thermal resistance (R_θJA) of the S3MB-K?

The S3MB-K has an R_θJA of 78 °C/W when mounted on a standard 10 mm × 10 mm copper pad test board, as specified in the Thermal Performance section. This value defines the thermal path from junction to ambient air and is essential for calculating maximum allowable power dissipation at a given ambient temperature.

Does the S3MB-K meet RoHS and halogen-free requirements?

Yes, the S3MB-K is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the FEATURES section of the official datasheet. The molding compound is UL 94V-0 rated, and terminals pass JESD 201 Class 1 whisker testing - fulfilling environmental and reliability requirements for industrial and telecom end equipment.

S3MB-K Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 3A

Voltage - Forward (Vf) (Max) @ If:: 1.15 V @ 3 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 5 µA @ 1000 V

Capacitance @ Vr, F:: 60pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

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

S3MB-K FAQ

1.How can I place an order for S3MB-K through Aetrix?

Please submit a Request for Quotation (RFQ) for S3MB-K 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 S3MB-K reliable?

The price and inventory of S3MB-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3MB-K is usually 5 days.

3.What payment methods are accepted for S3MB-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3MB-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S3MB-K?

S3MB-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S3MB-K 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 S3MB-K?

For technical support, including S3MB-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3MB-K requirements.

6.How does Aetrix verify that S3MB-K is sourced from the original manufacturer or authorized distributors?

All S3MB-K 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 S3MB-K meets industry standards.

7.What is the process for return or replacement of S3MB-K?

All S3MB-K units undergo pre-shipment inspection (PSI). If there is an issue with S3MB-K, 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 S3MB-K part is unused and in its original packaging.

Return procedure for S3MB-K:

1.Submit a request within 90 days.

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

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