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

Taiwan Semiconductor Corporation S12KCH

Name: S12KCH
Brand: Taiwan Semiconductor Corporation
SKU: S12KCH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S12KCH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S12KCH.pdf

Description:: DIODE GEN PURP 800V 12A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,890

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Product details

Overview

S12KCH from Taiwan Semiconductor is a surface-mount silicon rectifier diode with 800 V repetitive peak reverse voltage (V_RRM), 12 A average forward current (I_F), and 300 A non-repetitive surge capability (I_FSM), designed for high-reliability automotive power conversion and snubber circuits.

For engineers reviewing the S12KCH datasheet, S12KCH pinout, S12KCH application, or S12KCH equivalent, key selection criteria include verified AEC-Q101 qualification, DO-214AB (SMC) package thermal performance (R_θJL = 9 °C/W), and junction temperature range of –55 °C to +150 °C under automotive operating conditions.

Technical Context

The S12KCH is a single-die, glass-passivated, standard recovery rectifier optimized for DC–DC converters and snubber networks where fast switching is not required but robust surge handling and thermal stability are critical. Its 800 V V_RRM rating supports 400 V AC input-derived systems with margin.

It operates across –55 °C to +150 °C junction temperature, features matte tin-plated leads compliant with J-STD-002, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - confirming suitability for reflow-soldered automotive PCB assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	800 V - Supports 560 V RMS input (e.g., 400 V AC line-derived supplies) with 25% safety margin
I_F	12 A - Continuous average forward current at T_A = 75 °C with adequate heatsinking
I_FSM	300 A - Withstands 8.3 ms half-sine surge per IEC 61000-4-5, critical for load dump protection
V_F @ 12 A	≤1.1 V - Low conduction loss enables <13.2 W dissipation at full rated current
R_θJL	9 °C/W - Enables direct thermal path to PCB copper, supporting >10 W power handling without external heatsink
Junction capacitance	78 pF @ 4 V - Limits high-frequency displacement current in snubber and EMI filter applications

Pinout & Package

Package: DO-214AB (SMC), molded epoxy case meeting UL 94V-0; cathode indicated by band; matte tin-plated leads; weight ≈ 0.270 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead 1)	Forward current entry point	Connected to lower-potential side of circuit (e.g., ground return or low-side switch node)
Cathode (lead 2)	Forward current exit / reverse-blocking terminal	Marked with band; connects to higher-potential node (e.g., input rail or snubber capacitor positive)

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST per stress test requirements
Glass passivated junction	Prevents moisture ingress and surface leakage degradation in humid or condensing environments
Low V_F (≤1.1 V @ 12 A)	Reduces conduction losses by ~15% vs. comparable 12 A rectifiers with V_F ≥ 1.25 V
J-STD-020 Level 1 MSL	Zero bake requirement before reflow; compatible with standard lead-free SMT processes without dry-pack handling
Halogen-free (IEC 61249-2-21)	Meets automotive OEM environmental compliance mandates for flame-retardant material content

Applications

DC–DC Converter	Automotive Lighting
Use Scenario: Secondary-side rectification in 12 V/48 V bidirectional DC–DC converters for mild-hybrid vehicle architectures. IC Role / Device Role / Timing Role: Power rectifier converting transformer secondary AC to regulated DC output. Use Value: 800 V V_RRM accommodates reflected transients during phase-shift control; 300 A I_FSM withstands startup inrush without derating.	Use Scenario: LED driver output stage in adaptive front-lighting systems (AFS) with PWM dimming and overvoltage protection. IC Role / Device Role / Timing Role: Freewheeling diode across inductive LED current paths during PWM off-time. Use Value: Glass passivation ensures long-term reliability under thermal cycling (–40 °C to +125 °C ambient); R_θJL = 9 °C/W minimizes local hotspot rise.
Snubber Network	General Purpose Rectification
Use Scenario: RC snubber across MOSFET drain-source in high-voltage buck converters for EV onboard chargers. IC Role / Device Role / Timing Role: Clamping diode conducting transient energy into snubber capacitor during turn-off. Use Value: 78 pF junction capacitance limits displacement current at 100 kHz switching; 1.1 V V_F reduces snubber conduction loss during clamping events.	Use Scenario: Input bridge rectification in industrial 240 V AC-powered power supplies for motor controllers. IC Role / Device Role / Timing Role: Single-phase rectifier in discrete bridge configuration or as freewheeling element. Use Value: DO-214AB package enables automated placement; AEC-Q101 qualification provides extended field-life assurance beyond commercial-grade alternatives.

DC–DC Converter

Automotive Lighting

Use Scenario: Secondary-side rectification in 12 V/48 V bidirectional DC–DC converters for mild-hybrid vehicle architectures.

IC Role / Device Role / Timing Role: Power rectifier converting transformer secondary AC to regulated DC output.

Use Value: 800 V V_RRM accommodates reflected transients during phase-shift control; 300 A I_FSM withstands startup inrush without derating.

Use Scenario: LED driver output stage in adaptive front-lighting systems (AFS) with PWM dimming and overvoltage protection.

IC Role / Device Role / Timing Role: Freewheeling diode across inductive LED current paths during PWM off-time.

Use Value: Glass passivation ensures long-term reliability under thermal cycling (–40 °C to +125 °C ambient); R_θJL = 9 °C/W minimizes local hotspot rise.

Snubber Network

General Purpose Rectification

Use Scenario: RC snubber across MOSFET drain-source in high-voltage buck converters for EV onboard chargers.

IC Role / Device Role / Timing Role: Clamping diode conducting transient energy into snubber capacitor during turn-off.

Use Value: 78 pF junction capacitance limits displacement current at 100 kHz switching; 1.1 V V_F reduces snubber conduction loss during clamping events.

Use Scenario: Input bridge rectification in industrial 240 V AC-powered power supplies for motor controllers.

IC Role / Device Role / Timing Role: Single-phase rectifier in discrete bridge configuration or as freewheeling element.

Use Value: DO-214AB package enables automated placement; AEC-Q101 qualification provides extended field-life assurance beyond commercial-grade alternatives.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-12EWH08-M3	Same DO-214AB package, 800 V V_RRM, but 12.5 A I_F and 250 A I_FSM; VF = 1.15 V @ 12 A	Lower surge rating reduces margin in load-dump-prone automotive systems	Select when lower cost is prioritized and surge exposure is controlled
ON Semiconductor MUR1280CT	TO-220AC package, 800 V, 12 A, but ultrafast recovery (t_rr = 75 ns); VF = 1.85 V @ 12 A	Higher V_F increases conduction loss; TO-220 requires through-hole assembly and heatsink mounting	Select only if fast recovery is mandatory and thermal design accommodates higher dissipation

Compared with VS-12EWH08-M3 and MUR1280CT, the S12KCH delivers superior surge robustness (300 A vs. 250 A/-) and lower forward loss in a surface-mount package qualified for automotive reflow, making it optimal for space-constrained, high-transient automotive power stages.

Availability

S12KCH is available at Aetrix Electronics and suitable for automotive lighting, DC–DC converter, and snubber applications requiring stable component supply, AEC-Q101 compliance, and DO-214AB packaging for automated manufacturing.

Supply support for S12KCH 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 devices, rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.

The S12KCH belongs to TSC's A2102-series surface-mount rectifier family, engineered specifically for high-current, high-reliability automotive power conversion where thermal stability, surge immunity, and process compatibility are primary design drivers.

FAQ

What is the maximum junction temperature rating for the S12KCH?

The S12KCH has a maximum junction temperature (T_J) rating of +150 °C, with operational capability down to –55 °C. This wide range supports use in under-hood automotive environments where ambient temperatures exceed 105 °C. The device's R_θJL of 9 °C/W allows effective heat transfer to the PCB, enabling sustained operation near its thermal limit when properly mounted on ≥1 in² of 2-oz copper.

Is the S12KCH AEC-Q101 qualified, and what tests does that include?

Yes, the S12KCH is AEC-Q101 qualified. Certification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock - all performed per AEC-Q101-001 Rev D. This qualification confirms suitability for automotive power modules, lighting, and body electronics where long-term reliability under thermal and electrical stress is mandatory.

What does the marking code 'S12KC' on the S12KCH indicate?

The marking code 'S12KC' laser-etched on the S12KCH identifies it as the 800 V variant within the S12xCH family. 'S12' denotes 12 A rating, 'K' specifies 800 V V_RRM, and 'C' indicates the DO-214AB (SMC) package. This matches the ordering code S12KCH and distinguishes it from S12GCH (400 V), S12JCH (600 V), and S12MCH (1000 V).

How does the S12KCH compare to standard recovery rectifiers in terms of reverse recovery behavior?

The S12KCH is a standard recovery rectifier with no specified reverse recovery time (t_rr) in its datasheet, indicating t_rr > 500 ns - typical for high-current, low-V_F devices. It is not intended for high-frequency switching (>100 kHz). For such applications, an ultrafast rectifier like the MUR1280CT would be required, though at the cost of higher V_F and different packaging. The S12KCH excels in lower-frequency, high-surge applications like automotive DC–DC and snubbers.

Can the S12KCH be used in a full-wave bridge configuration?

Yes, the S12KCH can be used in discrete full-wave bridge configurations due to its single-die, two-terminal construction and DO-214AB package symmetry. Four S12KCH units can form a 800 V, 12 A bridge with matched thermal and electrical characteristics. However, layout must ensure balanced current sharing and thermal coupling; dedicated bridge packages (e.g., GBU8K) offer tighter matching but lack AEC-Q101 qualification and SMC footprint compatibility.

S12KCH 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):: 800 V

Current - Average Rectified (Io):: 12A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 12 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 800 V

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

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

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

S12KCH FAQ

1.How can I place an order for S12KCH through Aetrix?

Please submit a Request for Quotation (RFQ) for S12KCH 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 S12KCH reliable?

The price and inventory of S12KCH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12KCH is usually 5 days.

3.What payment methods are accepted for S12KCH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12KCH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S12KCH?

S12KCH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S12KCH 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 S12KCH?

For technical support, including S12KCH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12KCH requirements.

6.How does Aetrix verify that S12KCH is sourced from the original manufacturer or authorized distributors?

All S12KCH 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 S12KCH meets industry standards.

7.What is the process for return or replacement of S12KCH?

All S12KCH units undergo pre-shipment inspection (PSI). If there is an issue with S12KCH, 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 S12KCH part is unused and in its original packaging.

Return procedure for S12KCH:

1.Submit a request within 90 days.

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

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