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Taiwan Semiconductor Corporation SA11CAH
- Part No.:
- SA11CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11CAH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,693
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Product details
Overview
SA11CAH from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 11V working stand-off voltage (VWM), 12.2–14.9V breakdown voltage (VBR @ 1mA), and 20.1V maximum clamping voltage (VC) at 26A peak pulse current. It delivers AEC-Q101 qualification for automotive-grade surge protection in power supply rails and signal lines.
For engineers reviewing the SA11CAH datasheet, SA11CAH pinout, SA11CAH application, or SA11CAH equivalent, this device is selected for high-reliability ESD and EFT immunity in 12V automotive subsystems, industrial I/O protection, and DC-DC converter input filtering where fast response (<1.0ps), low leakage (<1μA @ 11V), and stable junction temperature up to +175°C are required.
Technical Context
The SA11CAH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range of 12.2–14.9V at 1mA test current. Its clamping action limits transients to ≤20.1V at 26A (10/1000μs waveform), enabling robust protection of downstream MOSFETs, microcontrollers, and CAN transceivers.
Designed for automotive environments, it meets AEC-Q101 stress requirements including temperature cycling, humidity bias, and mechanical shock. Its DO-204AC package supports lead-free reflow soldering per J-STD-002, with pure tin-plated leads and UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin above 12V nominal rail. |
| VBR min/max | 12.2 V / 14.9 V @ 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 20.1 V @ 26 A - Clamped voltage during 500W transient; guarantees downstream ICs see <20.1V under worst-case surge. |
| PPK | 500 W - Peak pulse power rating at 10/1000μs waveform; defines single-event surge handling capability. |
| IR @ VWM | <1 μA - Reverse leakage at 11V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive locations and high-ambient industrial enclosures. |
| Response time | <1.0 ps - Time from 0V to VBR onset; ensures suppression initiates before nanosecond-scale ESD events damage sensitive inputs. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking. Complies with UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance. Weight: ~0.400g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference | Connected to circuit ground or low-side return; completes conduction path during reverse transient clamp. |
| Cathode | Transient voltage sensing / Clamp node | Connected to protected line (e.g., 12V rail); avalanche breakdown occurs between cathode and anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TC, HAST, and mechanical shock - no derating needed for under-hood deployment. |
| 500W peak pulse power | Withstands 10/1000μs surges up to 500W without degradation - sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 events. |
| Low clamping ratio (VC/VBR) | Typical VC/VBR ≈ 1.62 (20.1V / 12.4V avg) - tight ratio minimizes overvoltage stress on protected ICs during clamping. |
| Sub-1ps response time | Activates before ESD pulses (IEC 61000-4-2) reach peak amplitude - prevents latch-up or gate oxide rupture in CMOS interfaces. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V power rail and LIN bus lines in BCM against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V rail and chassis ground to clamp transients before they reach MCU power pins and LIN transceiver VCC. Use Value: Limits clamped voltage to ≤20.1V during 500W surges, preserving MCU reset integrity and preventing LIN physical layer damage per ISO 17987-4. |
Use Scenario: Shielding 24V digital input channels in programmable logic controllers from field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Front-end TVS on each optocoupler input leg to absorb repetitive 5kHz EFT noise (IEC 61000-4-4) and accidental 24V polarity reversal. Use Value: Sub-1ps response ensures clamping initiates within first 100ps of EFT edge, reducing coupled noise into isolation barrier by >20dB. |
| Automotive Infotainment Power Supply | DC-DC Converter Input Stage |
Use Scenario: Safeguarding USB-C PD controller and display power sequencing ICs from battery line transients during ignition and alternator regulation faults. IC Role / Device Role / Timing Role: Primary TVS on 12V-to-5V buck converter input, positioned upstream of EMI filter and input capacitor. Use Value: 175°C max junction temperature allows placement near hot power inductors without thermal derating; 1μA leakage avoids loading low-quiescent PMIC enable lines. |
Use Scenario: Protecting synchronous buck controller ICs from reflected voltage spikes caused by high-di/dt switching in automotive DC-DC modules. IC Role / Device Role / Timing Role: Clamp diode across input bulk capacitor terminals to suppress ringing and overshoot exceeding 12V rail rating. Use Value: 20.1V clamping voltage ensures controller VDD remains below absolute maximum rating (typically 28V), preventing internal LDO failure or bootstrap circuit disruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Same VWM (11V), but lower PPK (400W); DO-214AC (SMA) package; non-AEC-Q101 rated. | Lacks automotive qualification; suitable only for commercial-grade industrial or consumer power supplies. | Select SMAJ11A only if AEC-Q101 compliance is not required and PCB layout accommodates SMA footprint. |
| P6SMB11CA | Bidirectional variant (CA suffix), same VWM/VBR range; 600W PPK; DO-214AA (SMB) package; AEC-Q101 available. | Clamps both polarities - appropriate for AC-coupled or floating signal lines, but over-spec'd for unidirectional 12V rail protection. | Choose P6SMB11CA only when bidirectional protection is needed (e.g., RS-485 bus); SA11CAH offers better cost and size efficiency for DC rail use. |
Compared with SMAJ11A and P6SMB11CA, SA11CAH uniquely combines AEC-Q101 qualification, 500W surge rating, and DO-204AC form factor optimized for through-hole automotive harness connections - delivering verified reliability where space, qualification, and unidirectional clamping are jointly constrained.
Availability
SA11CAH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and DC-DC converter input protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SA11CAH 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 TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, tight parametric distribution, and robust surge endurance in harsh thermal and electrical environments.
FAQ
What does the "H" suffix in SA11CAH signify?
The "H" suffix in SA11CAH indicates full AEC-Q101 qualification per Rev D requirements, including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). This certification confirms SA11CAH's suitability for automotive powertrain, chassis, and body electronics where zero-failure reliability is mandated - unlike standard SA11CA variants which lack formal automotive validation.
Is SA11CAH unidirectional or bidirectional?
SA11CAH is a unidirectional TVS diode, as confirmed by its "CA" designation (C = common cathode, A = unidirectional) and explicit specification of VBR and VC only for reverse-biased operation. Its cathode band marking and DO-204AC pinout require correct orientation - anode to ground, cathode to protected line - to function. Bidirectional behavior is not supported or characterized for SA11CAH.
What is the maximum clamping voltage of SA11CAH under surge conditions?
The maximum clamping voltage (VC) of SA11CAH is 20.1 V at 26 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range (−55°C to +175°C) and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Can SA11CAH be used in place of SA11A?
No - SA11CAH and SA11A are not interchangeable. SA11A is a unidirectional, non-AEC-Q101 part with identical VWM (11V) and VBR (12.2–13.5V), but lacks automotive qualification, has different packaging markings, and is not tested to AEC-Q101 stress profiles. Replacing SA11CAH with SA11A in automotive designs violates functional safety and qualification requirements.
What is the junction capacitance of SA11CAH at 0V and 1MHz?
Junction capacitance (CJ) for SA11CAH is not explicitly specified in the provided documentation. While typical SA-series diodes exhibit CJ values ranging from 100–1000 pF depending on voltage rating, no measurement or curve for SA11CAH is given in the SA Series datasheet (L2105). For high-speed signal line protection, consult TSC's application note AN-TVS-002 or request characterization data directly from Taiwan Semiconductor.
SA11CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 28A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA11CAH FAQ
1.How can I place an order for SA11CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11CAH 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 SA11CAH reliable?
The price and inventory of SA11CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11CAH is usually 5 days.
3.What payment methods are accepted for SA11CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11CAH?
SA11CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11CAH 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 SA11CAH?
For technical support, including SA11CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11CAH requirements.
6.How does Aetrix verify that SA11CAH is sourced from the original manufacturer or authorized distributors?
All SA11CAH 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 SA11CAH meets industry standards.
7.What is the process for return or replacement of SA11CAH?
All SA11CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA11CAH, 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 SA11CAH part is unused and in its original packaging.
Return procedure for SA11CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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