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

Taiwan Semiconductor Corporation S3DB-K

Name: S3DB-K
Brand: Taiwan Semiconductor Corporation
SKU: S3DB-K
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S3DB-K

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: S3DB-K.pdf

Description:: 3A, 200V, STANDARD RECTIFIER

Quantity:: RFQ Add To RFQ list

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Inventory:2,861

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Product details

Overview

S3DB-K from Taiwan Semiconductor is a 3A, 200V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and 80A surge capability - used in DC-DC converters and switching-mode power supplies.

For engineers reviewing the S3DB-K datasheet, S3DB-K pinout, S3DB-K application, or S3DB-K equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage (0.93 V @ 3 A, 25°C), thermal resistance (R_θJL = 20 °C/W), junction temperature range (–55 to +150°C), and RoHS/halogen-free compliance.

Technical Context

The S3DB-K is a single-die, unidirectional standard recovery rectifier optimized for general-purpose and switching-mode power conversion. Its glass-passivated junction ensures stable reverse characteristics and moisture resistance (J-STD-020 Level 1), while the DO-214AA (SMB) package supports automated placement and meets UL 94V-0 flammability requirements.

Electrical behavior is defined by a maximum forward voltage of 1.15 V at 3 A and 25°C, reverse current ≤300 µA at 125°C, and junction capacitance of 60 pF at 4 V - enabling predictable performance in high-frequency switching topologies with moderate dV/dt stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in bridge or freewheeling configurations.
I_F	3 A continuous - Average forward current rating at T_L = 75°C on 10 mm × 10 mm Cu pad; sets baseline conduction capacity.
I_FSM	80 A (8.3 ms) - Non-repetitive surge current handling; supports inrush and fault-current transients without failure.
V_F	0.93 V @ 3 A, 25°C - Forward drop directly impacts conduction loss and thermal design in power stages.
R_θJL	20 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when mounted on PCB copper.
I_R	≤5 µA @ 200 V, 25°C - Low leakage preserves efficiency in high-impedance bias networks and standby circuits.
T_J max	+150°C - Maximum junction temperature; allows operation in thermally constrained industrial environments.

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.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); polarity must align with layout marking.
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to higher-potential rail (e.g., output capacitor positive); determines rectification direction.

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable reverse leakage (<5 µA at 25°C) and long-term reliability under humid conditions per J-STD-020 Level 1.
DO-214AA (SMB) package	Supports automated pick-and-place; footprint compatible with IPC-7351B SMB standard; 0.090 g mass aids thermal management on PCB.
Low forward voltage	0.93 V @ 3 A reduces conduction loss by ~15% vs. comparable 1N5822-level Schottky alternatives at same current.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - required for export to EU, Japan, and China markets.
UL 94V-0 molding compound	Ensures flame-retardant enclosure integrity during overtemperature events in enclosed power modules.

Applications

DC-DC Converter	Switching Inverter
Use Scenario: Output rectification in isolated flyback or forward converters delivering 5–24 V at up to 3 A. IC Role / Device Role / Timing Role: Unidirectional current path enforcing polarity and blocking reverse voltage during transformer reset. Use Value: 200 V V_RRM provides 2× margin over 12 V output with reflected primary spikes; 0.93 V V_F limits power loss to <3 W at full load.	Use Scenario: Freewheeling diode across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time. Use Value: 80 A I_FSM withstands short-circuit transients; 150°C T_Jmax supports operation near heatsink-limited MOSFETs.
AC-DC Adapter	Industrial Power Supply
Use Scenario: Secondary-side rectification in compact wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates in continuous conduction mode. Use Value: DO-214AA footprint minimizes board area; 0.090 g weight eases mechanical stress on solder joints during thermal cycling.	Use Scenario: Input stage rectification in 24–48 V industrial SMPS with wide ambient temperature range. IC Role / Device Role / Timing Role: Handles line-frequency input rectification and ripple filtering before PFC stage. Use Value: –55 to +150°C T_J range ensures functionality in unheated enclosures; R_θJL = 20 °C/W simplifies thermal pad design.

DC-DC Converter

Switching Inverter

Use Scenario: Output rectification in isolated flyback or forward converters delivering 5–24 V at up to 3 A.

IC Role / Device Role / Timing Role: Unidirectional current path enforcing polarity and blocking reverse voltage during transformer reset.

Use Value: 200 V V_RRM provides 2× margin over 12 V output with reflected primary spikes; 0.93 V V_F limits power loss to <3 W at full load.

Use Scenario: Freewheeling diode across inductive loads (e.g., motor windings or solenoids) in half-bridge inverters.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during high-side switch off-time.

Use Value: 80 A I_FSM withstands short-circuit transients; 150°C T_Jmax supports operation near heatsink-limited MOSFETs.

AC-DC Adapter

Industrial Power Supply

Use Scenario: Secondary-side rectification in compact wall adapters powering consumer electronics.

IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates in continuous conduction mode.

Use Value: DO-214AA footprint minimizes board area; 0.090 g weight eases mechanical stress on solder joints during thermal cycling.

Use Scenario: Input stage rectification in 24–48 V industrial SMPS with wide ambient temperature range.

IC Role / Device Role / Timing Role: Handles line-frequency input rectification and ripple filtering before PFC stage.

Use Value: –55 to +150°C T_J range ensures functionality in unheated enclosures; R_θJL = 20 °C/W simplifies thermal pad design.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L02	3 A, 200 V, TO-220AC package; higher V_F (1.15 V @ 3 A); R_θJA = 50 °C/W (free air)	Requires heatsink for >1.5 A continuous; unsuitable for space-constrained SMT designs	Choose STTH3L02 only when through-hole mounting and higher surge tolerance (100 A) are prioritized over board area.
SB320-E3/54	3 A, 20 V (not 200 V); Schottky architecture; V_F = 0.52 V @ 3 A; T_Jmax = 125°C	Cannot replace S3DB-K in 200 V blocking roles; limited to low-voltage DC-DC outputs	Select SB320-E3/54 only for ≤20 V output rectification where ultra-low V_F outweighs voltage rating deficiency.

Compared with STTH3L02 and SB320-E3/54, the S3DB-K uniquely balances 200 V blocking, SMT compatibility, and thermal performance in a cost-effective DO-214AA package - making it optimal for mid-power switching supplies where voltage rating, footprint, and reliability are jointly critical.

Availability

S3DB-K is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for S3DB-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, serving global power, automotive, and industrial markets since 1979.

The S3DB-K belongs to TSC's S3x series of standard surface-mount rectifiers, engineered specifically for cost-sensitive, high-volume power conversion applications demanding robustness, manufacturability, and regulatory compliance.

FAQ

What is the maximum junction temperature rating for the S3DB-K?

The S3DB-K has a maximum junction temperature (T_J) of +150°C, verified per absolute maximum ratings table. This allows reliable operation in thermally demanding environments such as enclosed industrial power supplies. Derating curves in the datasheet confirm usable current capacity down to –55°C ambient, and the S3DB-K maintains specified electrical parameters within this full range.

Does the S3DB-K have a RoHS and halogen-free certification?

Yes, the S3DB-K is RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. These certifications are explicitly stated in the product features section and confirmed in the ordering information notes. The device uses matte tin-plated leads and UL 94V-0 molding compound, supporting environmentally regulated manufacturing and export requirements.

What is the forward voltage of the S3DB-K at 3 A and 25°C?

The forward voltage (V_F) of the S3DB-K is 0.93 V typical and 1.15 V maximum at 3 A and 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and reflects real-world conduction loss in switching power supplies. At 125°C, V_F drops to 0.87 V typical, improving efficiency at elevated temperatures.

Is the S3DB-K pin-compatible with other parts in the S3x-K series?

No - all S3x-K parts (S3GB-K, S3JB-K, etc.) share identical DO-214AA (SMB) package and anode/cathode pinout, but differ only in V_RRM rating (200–1000 V). The S3DB-K marking "S3DB" identifies its 200 V rating; physical layout and solder footprint are fully interchangeable across the family for design reuse.

What is the surge current rating of the S3DB-K and how is it tested?

The S3DB-K has a non-repetitive peak forward surge current (I_FSM) of 80 A for t = 8.3 ms (half-sine wave), per Absolute Maximum Ratings. This rating is validated using standardized JEDEC test conditions and applies to single-event overload scenarios like startup inrush or short-circuit recovery. A second rating of 224 A is specified for t = 1.0 ms pulses.

S3DB-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 @ 200 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

S3DB-K FAQ

1.How can I place an order for S3DB-K through Aetrix?

Please submit a Request for Quotation (RFQ) for S3DB-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 S3DB-K reliable?

The price and inventory of S3DB-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S3DB-K is usually 5 days.

3.What payment methods are accepted for S3DB-K?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S3DB-K transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S3DB-K?

S3DB-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S3DB-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 S3DB-K?

For technical support, including S3DB-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S3DB-K requirements.

6.How does Aetrix verify that S3DB-K is sourced from the original manufacturer or authorized distributors?

All S3DB-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 S3DB-K meets industry standards.

7.What is the process for return or replacement of S3DB-K?

All S3DB-K units undergo pre-shipment inspection (PSI). If there is an issue with S3DB-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 S3DB-K part is unused and in its original packaging.

Return procedure for S3DB-K:

1.Submit a request within 90 days.

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

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