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

Taiwan Semiconductor Corporation S12GC

Name: S12GC
Brand: Taiwan Semiconductor Corporation
SKU: S12GC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S12GC

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S12GC.pdf

Description:: DIODE GEN PURP 400V 12A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,143

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Product details

Overview

S12GC from Taiwan Semiconductor is a 12A, 400V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, low 1.1V forward voltage at 12A, and 300A surge capability - deployed in high-efficiency SMPS secondary-side rectification.

For engineers reviewing the S12GC datasheet, S12GC pinout, S12GC application, or S12GC equivalent, key selection criteria include V_RRM = 400V, I_F = 12A, thermal resistance R_θJL = 9°C/W, and J-STD-020 Level 1 moisture sensitivity for automated SMT assembly.

Technical Context

The S12GC is a single-die, standard recovery rectifier optimized for switching-mode power supplies operating up to 150°C junction temperature. Its 44°C/W junction-to-ambient thermal resistance and 9°C/W junction-to-lead resistance support conduction-limited thermal design in compact layouts.

With 1.1V max forward voltage at 12A/25°C and only 1µA reverse leakage at rated 400V/25°C, the S12GC delivers low conduction loss and high blocking integrity - critical for adapter and lighting converter efficiency targets.

Key Specifications

Parameter	Value and Actual Design Meaning
I_F	12 A continuous average forward current - supports high-power output stages without forced air cooling
V_RRM	400 V repetitive peak reverse voltage - suitable for 280V_RMS AC input rectification in universal-input adapters
I_FSM	300 A non-repetitive surge current (8.3ms half-sine) - withstands inrush and transient overloads in SMPS startup
T_J max	+150 °C maximum junction temperature - enables operation in thermally constrained enclosures
V_F	≤1.1 V at I_F = 12A, T_J = 25°C - reduces conduction loss and improves system efficiency vs. higher-V_F alternatives
R_θJL	9 °C/W junction-to-lead thermal resistance - allows direct heat transfer to PCB copper pour or heatsink via lead frame

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.270g weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to transformer secondary or DC bus negative; requires adequate copper area for 12A conduction
Cathode	Forward current exit / reverse blocking terminal	Marked with band; ties to output filter capacitor positive; must maintain creepage for 400V isolation

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability and reduced parameter drift under thermal cycling and humidity stress
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow - compatible with standard J-STD-020 SMT processes
High I_FSM/I_F ratio (25:1)	Provides robustness against line surges and short-circuit transients without derating
RoHS & halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for consumer and industrial end equipment

Applications

SMPS Secondary Rectification	AC-DC Adapter Output Stage
Use Scenario: High-frequency flyback or forward converter output rectification in 65–150W power supplies. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary to regulated DC output. Use Value: 1.1V V_F minimizes conduction loss; 300A I_FSM handles startup surges without snubber redesign.	Use Scenario: Universal-input (90–264V_AC) wall adapters powering laptops and monitors. IC Role / Device Role / Timing Role: Main output rectifier delivering 12–20V/3–6A DC after transformer isolation. Use Value: 400V V_RRM provides sufficient margin over 280V_RMS peak; DO-214AB footprint enables high-density layout.
LED Driver Converter	Industrial DC-DC Module Input Rectification
Use Scenario: Constant-current LED drivers using buck-derived topologies with high-side rectification. IC Role / Device Role / Timing Role: Freewheeling or synchronous rectifier replacement in isolated LED driver secondary side. Use Value: Low 1µA reverse leakage at 25°C ensures minimal standby power loss in always-on lighting systems.	Use Scenario: 24/48V input stage of isolated DC-DC modules used in PLC and sensor interface boards. IC Role / Device Role / Timing Role: Input bridge or single-phase rectifier converting AC or reverse-polarity DC input to internal bus. Use Value: 150°C T_J_max and 9°C/W R_θJL allow reliable operation in sealed industrial enclosures with limited airflow.

SMPS Secondary Rectification

AC-DC Adapter Output Stage

Use Scenario: High-frequency flyback or forward converter output rectification in 65–150W power supplies.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary to regulated DC output.

Use Value: 1.1V V_F minimizes conduction loss; 300A I_FSM handles startup surges without snubber redesign.

Use Scenario: Universal-input (90–264V_AC) wall adapters powering laptops and monitors.

IC Role / Device Role / Timing Role: Main output rectifier delivering 12–20V/3–6A DC after transformer isolation.

Use Value: 400V V_RRM provides sufficient margin over 280V_RMS peak; DO-214AB footprint enables high-density layout.

LED Driver Converter

Industrial DC-DC Module Input Rectification

Use Scenario: Constant-current LED drivers using buck-derived topologies with high-side rectification.

IC Role / Device Role / Timing Role: Freewheeling or synchronous rectifier replacement in isolated LED driver secondary side.

Use Value: Low 1µA reverse leakage at 25°C ensures minimal standby power loss in always-on lighting systems.

Use Scenario: 24/48V input stage of isolated DC-DC modules used in PLC and sensor interface boards.

IC Role / Device Role / Timing Role: Input bridge or single-phase rectifier converting AC or reverse-polarity DC input to internal bus.

Use Value: 150°C T_J_max and 9°C/W R_θJL allow reliable operation in sealed industrial enclosures with limited airflow.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH12R06DJF	600V V_RRM, 1.25V V_F @ 12A, TO-277 package	Higher voltage rating but higher forward drop and larger footprint	Select when 600V blocking margin is required and board space permits TO-277
MBR1245CT	45V V_RRM, dual Schottky, TO-220AB package	Lower voltage, faster recovery, but unsuitable for 400V AC-line applications	Only viable for low-voltage DC-DC outputs; not a functional substitute for S12GC's 400V AC-rectification role

Compared with STTH12R06DJF and MBR1245CT, the S12GC uniquely balances 400V blocking, 12A current, low 1.1V V_F, and compact DO-214AB packaging - making it optimal for cost- and space-constrained universal-input SMPS where 600V+ rating is unnecessary.

Availability

S12GC is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting converters requiring stable component supply across production volumes and extended lifecycle planning.

Supply support for S12GC 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, and MOSFETs.

The S12GC belongs to TSC's S12x series of high-current surface-mount rectifiers, engineered specifically for high-efficiency, high-reliability AC-DC conversion in consumer and industrial power supplies.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for the S12GC?

The S12GC has a V_RRM of 400 V, verified per Taiwan Semiconductor's D2102 datasheet. This rating ensures safe operation under peak AC line conditions up to 280V_RMS, with appropriate safety margin for transient overvoltage. The S12GC datasheet specifies this value explicitly in its Absolute Maximum Ratings table.

Does the S12GC require pre-reflow baking before assembly?

No, the S12GC does not require pre-reflow baking because it is rated at Moisture Sensitivity Level 1 per J-STD-020. This means the device can be stored indefinitely at ambient conditions and placed directly into standard reflow profiles without moisture-related popcorning risk - a key advantage for high-throughput SMT lines.

What is the forward voltage drop (V_F) of the S12GC at full rated current?

The S12GC exhibits a maximum forward voltage drop of 1.1 V at I_F = 12 A and T_J = 25°C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal and efficiency calculations in designs using the S12GC.

Is the S12GC RoHS and halogen-free compliant?

Yes, the S12GC is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the Features section of the official Taiwan Semiconductor datasheet (Version D2102). This compliance supports regulatory requirements for consumer electronics and industrial equipment sold in EU, China, and other regulated markets.

What package type does the S12GC use, and what are its key mechanical attributes?

The S12GC uses the DO-214AB (SMC) surface-mount package, with matte tin-plated leads solderable per J-STD-002, UL 94V-0 flammability-rated molding compound, and cathode polarity indicated by a visible band. Its weight is approximately 0.270 g, and it is supplied in 3,000-piece tape-and-reel format - all confirmed in the Mechanical Data and Ordering Information sections for the S12GC.

S12GC Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 12A

Voltage - Forward (Vf) (Max) @ If:: -

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 400 V

Capacitance @ Vr, F:: 78pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

S12GC FAQ

1.How can I place an order for S12GC through Aetrix?

Please submit a Request for Quotation (RFQ) for S12GC 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 S12GC reliable?

The price and inventory of S12GC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12GC is usually 5 days.

3.What payment methods are accepted for S12GC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12GC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S12GC?

S12GC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S12GC 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 S12GC?

For technical support, including S12GC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12GC requirements.

6.How does Aetrix verify that S12GC is sourced from the original manufacturer or authorized distributors?

All S12GC 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 S12GC meets industry standards.

7.What is the process for return or replacement of S12GC?

All S12GC units undergo pre-shipment inspection (PSI). If there is an issue with S12GC, 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 S12GC part is unused and in its original packaging.

Return procedure for S12GC:

1.Submit a request within 90 days.

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

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