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

Taiwan Semiconductor Corporation S12GCH

Name: S12GCH
Brand: Taiwan Semiconductor Corporation
SKU: S12GCH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S12GCH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: S12GCH.pdf

Description:: DIODE GEN PURP 400V 12A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:2,996

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Product details

Overview

S12GCH from Taiwan Semiconductor is a surface-mount, AEC-Q101-qualified 12A, 400V general-purpose rectifier diode with glass-passivated junction, low forward voltage drop (≤1.1 V at 12 A), and high surge capability (300 A, 8.3 ms). It is used in automotive DC-DC converters, car lighting circuits, and snubber networks where reliability under thermal stress and transient conditions is critical.

For engineers reviewing the S12GCH datasheet, S12GCH pinout, S12GCH application, or S12GCH equivalent, key selection factors include its DO-214AB (SMC) package compatibility, 150°C maximum junction temperature, 9°C/W junction-to-lead thermal resistance, and verified performance at 125°C reverse leakage (250 µA).

Technical Context

The S12GCH is a single-die, unidirectional silicon rectifier optimized for high-current, medium-voltage DC power conversion. Its glass-passivated junction ensures stable reverse characteristics and moisture resistance, while the DO-214AB (SMC) package supports automated placement and meets JESD201 Class 2 whisker requirements.

Thermally, it delivers R_θJL = 9°C/W and R_θJA = 44°C/W, enabling sustained 12 A conduction at ambient temperatures up to 75°C without forced cooling. Reverse recovery behavior is not specified; it is intended for line-frequency and moderate-switching applications-not fast-recovery or soft-recovery use cases.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse voltage; defines safe blocking capability in DC-DC input stages and snubbers.
I_F	12 A - Continuous average forward current; supports high-power automotive lighting and converter output rectification.
I_FSM	300 A - Non-repetitive peak surge current (8.3 ms sine); withstands inrush and fault transients in automotive systems.
V_F	≤1.1 V @ 12 A, 25°C - Low conduction loss reduces thermal load and improves efficiency in thermally constrained layouts.
T_J max	150°C - Maximum junction temperature; enables operation in under-hood environments with minimal derating.
C_J	78 pF @ 1 MHz, 4 V - Junction capacitance impacts high-frequency switching noise; relevant for snubber tuning and EMI filtering.

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode-indicated by molded band. Matte tin-plated leads, UL 94V-0 molding compound, MSL Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) in full-wave or half-wave rectification.
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to output rail or filter capacitor positive; must be routed with low-inductance path in snubber applications.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock-required for under-hood deployment.
Glass-passivated junction	Eliminates metallization corrosion and enhances long-term stability of reverse leakage and breakdown voltage over humidity exposure.
Low V_F (≤1.1 V)	Reduces power dissipation by ~1.5 W vs. typical 1.3 V diodes at 12 A, lowering heatsink requirements in space-constrained modules.
High I_FSM (300 A)	Supports robustness against load dump and cold-crank surges in 12 V automotive systems without external fusing.
DO-214AB (SMC) package	Enables high-density PCB layout and compatibility with standard SMT pick-and-place equipment; footprint matches industry-standard SMC footprints.

Applications

DC–DC Converter	Automotive Lighting
Use Scenario: Secondary-side rectification in isolated 12 V → 5 V/3.3 V buck-boost converters for infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: Power rectifier converting transformer AC output to regulated DC bus. Use Value: 12 A rating and 400 V V_RRM accommodate wide input transients; low V_F minimizes heat generation near sensitive analog ICs.	Use Scenario: LED headlamp driver output stage in modern adaptive front-lighting systems (AFS). IC Role / Device Role / Timing Role: High-current freewheeling and rectification path during PWM dimming and boost regulation. Use Value: AEC-Q101 qualification and 150°C T_J ensure uninterrupted operation in sealed, thermally isolated lamp housings.
Snubber Network	General Purpose Rectification
Use Scenario: RC snubber across MOSFET/IGBT switches in automotive motor drivers and HVAC inverters. IC Role / Device Role / Timing Role: Transient energy clamping diode absorbing turn-off voltage spikes. Use Value: 300 A I_FSM and low C_J (78 pF) enable effective spike suppression without oscillatory ringing or self-heating failure.	Use Scenario: Input bridge rectification in auxiliary power supplies for body control modules (BCM) and telematics units. IC Role / Device Role / Timing Role: General-purpose AC-to-DC conversion with industrial-grade surge tolerance. Use Value: MSL Level 1 and halogen-free construction meet automotive manufacturing and environmental compliance mandates (RoHS, IEC 61249-2-21).

DC–DC Converter

Automotive Lighting

Use Scenario: Secondary-side rectification in isolated 12 V → 5 V/3.3 V buck-boost converters for infotainment and ADAS ECUs.

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

Use Value: 12 A rating and 400 V V_RRM accommodate wide input transients; low V_F minimizes heat generation near sensitive analog ICs.

Use Scenario: LED headlamp driver output stage in modern adaptive front-lighting systems (AFS).

IC Role / Device Role / Timing Role: High-current freewheeling and rectification path during PWM dimming and boost regulation.

Use Value: AEC-Q101 qualification and 150°C T_J ensure uninterrupted operation in sealed, thermally isolated lamp housings.

Snubber Network

General Purpose Rectification

Use Scenario: RC snubber across MOSFET/IGBT switches in automotive motor drivers and HVAC inverters.

IC Role / Device Role / Timing Role: Transient energy clamping diode absorbing turn-off voltage spikes.

Use Value: 300 A I_FSM and low C_J (78 pF) enable effective spike suppression without oscillatory ringing or self-heating failure.

Use Scenario: Input bridge rectification in auxiliary power supplies for body control modules (BCM) and telematics units.

IC Role / Device Role / Timing Role: General-purpose AC-to-DC conversion with industrial-grade surge tolerance.

Use Value: MSL Level 1 and halogen-free construction meet automotive manufacturing and environmental compliance mandates (RoHS, IEC 61249-2-21).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-12EWH04-M3	Same DO-214AB package, 12 A/400 V, but AEC-Q101 not claimed; V_F = 1.05 V (typ), I_FSM = 250 A.	Lacks formal automotive qualification; suitable for industrial or consumer-grade DC-DC where AEC-Q101 is not mandated.	Select when cost sensitivity outweighs automotive certification requirements and surge margin can be relaxed.
ON Semiconductor MUR1240CT	TO-220AC package, 12 A/400 V, fast recovery (t_rr = 60 ns), AEC-Q101 qualified; higher thermal resistance (R_θJA ≈ 50°C/W).	Requires through-hole mounting and larger board area; better suited for high-frequency switching snubbers needing fast t_rr.	Choose only if fast recovery is required and surface-mount constraint is waived; not a drop-in replacement.

Compared with VS-12EWH04-M3 and MUR1240CT, the S12GCH uniquely balances AEC-Q101 compliance, SMT manufacturability, and 300 A surge margin in the DO-214AB footprint-making it optimal for space-constrained, thermally demanding automotive power stages where qualification and ruggedness are non-negotiable.

Availability

S12GCH is available at Aetrix Electronics and suitable for automotive lighting systems, DC–DC converters, and snubber networks requiring stable component supply, long-term lifecycle support, and traceable sourcing for Tier-1 OEM programs.

Supply support for S12GCH 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 Taiwanese manufacturer specializing in discrete power semiconductors, including rectifiers, TVS diodes, and MOSFETs for automotive and industrial markets.

The S12GCH belongs to TSC's AEC-Q101-qualified S12xCH rectifier family, engineered specifically for high-reliability, high-current automotive power conversion where thermal resilience and surge immunity are primary design drivers.

FAQ

What is the maximum junction temperature rating for the S12GCH?

The S12GCH has a maximum junction temperature (T_J) of +150°C, validated per AEC-Q101 stress testing. This allows continuous operation in under-hood automotive environments where ambient temperatures reach 125°C, provided thermal design maintains junction temperature below this limit. The S12GCH's R_θJL of 9°C/W supports efficient heat transfer to the PCB copper pour or heatsink.

Is the S12GCH pin-compatible with other parts in the S12xCH series?

Yes-the S12GCH shares identical DO-214AB (SMC) package dimensions, pad layout, and polarity marking (cathode band) with S12JCH, S12KCH, and S12MCH. All variants use the same anode/cathode terminal configuration and mechanical outline, enabling layout reuse across voltage grades. However, electrical ratings-including V_RRM, I_R, and thermal performance-are specific to each variant and must be verified per application.

Does the S12GCH have a specified reverse recovery time (t_rr)?

No-reverse recovery time (t_rr) is not specified in the official S12GCH datasheet or product summary. The device is characterized as a general-purpose rectifier, not a fast- or ultrafast-recovery diode. For applications requiring controlled t_rr (e.g., high-frequency switching snubbers), engineers should consult alternative devices like the ON Semiconductor MUR1240CT, which explicitly specifies t_rr = 60 ns.

What does the "G" in S12GCH indicate?

The "G" in S12GCH denotes the 400 V repetitive peak reverse voltage (V_RRM) rating. Per the ordering code table, "x" in S12xCH maps to voltage grade: G = 400 V, J = 600 V, K = 800 V, M = 1000 V. The marking code on the device body is "S12GC", consistent with this designation. This letter is part of the standardized TSC voltage binning scheme.

Is the S12GCH suitable for use in a flyback converter primary-side snubber?

Yes-the S12GCH is commonly deployed in RCD snubbers on the primary side of automotive flyback converters due to its 300 A I_FSM, 400 V V_RRM, and low junction capacitance (78 pF). Its glass-passivated junction ensures stable clamping behavior across temperature, and the DO-214AB package supports compact, high-density snubber layout. Ensure gate drive timing and resistor values are tuned to avoid excessive diode conduction duration.

S12GCH 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:: 1.1 V @ 12 A

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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

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

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

S12GCH FAQ

1.How can I place an order for S12GCH through Aetrix?

Please submit a Request for Quotation (RFQ) for S12GCH 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 S12GCH reliable?

The price and inventory of S12GCH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S12GCH is usually 5 days.

3.What payment methods are accepted for S12GCH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S12GCH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S12GCH?

S12GCH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S12GCH 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 S12GCH?

For technical support, including S12GCH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S12GCH requirements.

6.How does Aetrix verify that S12GCH is sourced from the original manufacturer or authorized distributors?

All S12GCH 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 S12GCH meets industry standards.

7.What is the process for return or replacement of S12GCH?

All S12GCH units undergo pre-shipment inspection (PSI). If there is an issue with S12GCH, 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 S12GCH part is unused and in its original packaging.

Return procedure for S12GCH:

1.Submit a request within 90 days.

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

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