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Taiwan Semiconductor Corporation SA11AH
- Part No.:
- SA11AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11AH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,069
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Product details
Overview
SA11AH from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 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 - deployed for automotive ESD and load-dump protection in engine control units and body electronics.
For engineers reviewing the SA11AH datasheet, SA11AH pinout, SA11AH application, or SA11AH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, thermal derating behavior up to 175°C junction temperature, and direct comparison with SA11A and SMAJ11A for automotive-grade TVS selection.
Technical Context
The SA11AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (12.2–14.9V @ 1mA), clamping transients to ≤20.1V at 26A IPPM while maintaining <1μA leakage above 10V. Its silicon p-n junction structure enables sub-nanosecond response (<1.0ps from 0V to VBR) and low dynamic impedance during surge events.
Designed for automotive environments, it meets AEC-Q101 stress test requirements including temperature cycling, humidity bias, and mechanical shock. The DO-204AC package supports lead-free soldering per J-STD-002 and passes JESD201 Class 2 whisker testing, with UL 94V-0 molding compound and pure tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; ensures no conduction during normal 12V automotive system operation. |
| VBR min/max | 12.2 / 14.9 V @ 1 mA - Verified breakdown threshold range; guarantees reliable turn-on within defined margin for robust overvoltage detection. |
| VC @ IPPM | 20.1 V @ 26 A - Clamped voltage during 10/1000μs surge; limits downstream IC stress to safe levels below typical 24V rail tolerance. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; sufficient for ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump initiation). |
| TJ max | +175 °C - Maximum junction temperature; enables placement near high-heat sources (e.g., power relays, motor drivers) without thermal shutdown. |
| IR @ VWM | <1 μA - Reverse leakage at 11V; minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with 0.400g mass; compatible with legacy through-hole assembly and automated tape-and-reel handling (3500/reel). |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. Cathode terminal is marked by a colored band; anode is unmarked lead. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to ground or low-side return path; establishes reference for clamping action when cathode rises above VBR. |
| Cathode | Transient voltage input / Clamping output node | Connected to protected line (e.g., LIN bus, sensor supply); conducts surge current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use across temperature cycling, HAST, and mechanical shock - required for ECUs, ADAS sensors, and body control modules. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 1 (−150V, 50Ω, 10/1000μs) and Pulse 5a (load dump) without degradation. |
| <1.0ps response time | Clamps transients before sensitive logic (e.g., CAN transceivers, microcontrollers) experiences damaging overvoltage. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes within 10 seconds after flame removal - critical for under-hood and cabin-mounted electronics. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21; eliminates brominated flame retardants and heavy metals for end-of-life recycling and emissions safety. |
Applications
| Automotive Engine Control Unit Protection | LIN Bus Transient Suppression |
|---|---|
Use Scenario: Protects MCU I/O pins and driver circuits in engine control units exposed to load dump (up to +40V) and inductive switching spikes from fuel injectors or ignition coils. IC Role / Device Role: Unidirectional TVS placed between 12V supply rail and ground, shunting surge energy away from power management ICs and analog front-ends. Use Value: Limits clamped voltage to 20.1V at 26A, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from regulated 12V supplies. |
Use Scenario: Shields LIN transceiver inputs against ESD (±25kV contact) and fast transient bursts (IEC 61000-4-4, ±2kV) in door modules and seat controllers. IC Role / Device Role: Placed on LIN data line (12V biased) with cathode to line and anode to ground, providing low-capacitance, fast-response clamping. Use Value: Sub-1.0ps response ensures clamping initiates before transceiver input stages exceed absolute maximum ratings, preserving signal integrity. |
| Body Electronics Power Rail Protection | Automotive Sensor Supply Protection |
Use Scenario: Guards 12V power rails feeding lighting control modules, mirror actuators, and HVAC blower motors against battery reversal and jump-start surges. IC Role / Device Role: Mounted directly at connector entry point, acting as first-line defense before DC-DC converters and LDOs. Use Value: 500W rating handles repetitive 10/1000μs pulses without parameter shift; 175°C TJ max allows placement near heat-generating loads. |
Use Scenario: Secures 5V or 3.3V sensor supply lines (e.g., oxygen sensors, pressure transducers) against coupling from adjacent high-current traces. IC Role / Device Role: Positioned between regulator output and sensor VDD pin, absorbing coupled transients before they reach precision analog circuitry. Use Value: <1μA leakage at 11V prevents loading of low-power regulators; tight VBR tolerance (12.2–14.9V) ensures predictable turn-on without premature conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SA11A | No AEC-Q101 qualification; identical VWM (11V), VBR (12.2–13.5V), VC (18.2V), and package; lower cost for non-automotive industrial use. | Not approved for automotive ECUs or safety-critical modules; suitable for consumer appliances and industrial controls where qualification is not mandated. | Select SA11A only when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability assurance. |
| SMAJ11A | Same VWM (11V) and DO-214AC package; slightly higher VC (23.2V @ 26.3A); RoHS-compliant but not AEC-Q101 qualified per standard documentation. | Common in telecom and computing; lacks automotive-specific validation (e.g., temperature cycling, board-level vibration). | Choose SMAJ11A only if footprint compatibility with SMC/SMA packages is prioritized over AEC-Q101 compliance and tighter clamping. |
Compared with SA11A and SMAJ11A, the SA11AH provides certified automotive reliability via AEC-Q101, tighter clamping (20.1V vs. 18.2V/23.2V), and guaranteed performance across −55°C to +175°C - making it the sole option for production automotive power rail protection where qualification evidence is mandatory.
Availability
SA11AH is available at Aetrix Electronics and suitable for automotive engine control units, LIN bus interfaces, and body electronics requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SA11AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 certification capability.
The SA Series was developed specifically for automotive transient suppression, targeting ISO 7637-2 and ISO 16750-2 compliance in 12V/24V systems - emphasizing low clamping voltage, fast response, and high-temperature reliability.
FAQ
What is the AEC-Q101 qualification status of the SA11AH?
The SA11AH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in TSC's SA Series datasheet Version L2105. This includes full stress testing for temperature cycling, high-temperature operating life, and mechanical shock - making SA11AH suitable for automotive powertrain and chassis applications where qualification evidence is contractually required.
Does the SA11AH have bidirectional or unidirectional polarity?
The SA11AH is a unidirectional TVS diode, as indicated by its part number structure (no "C" or "CA" suffix) and cathode-band marking per DO-204AC mechanical drawing. It conducts only during reverse-biased overvoltage events - ideal for protecting positive-rail circuits like 12V automotive supplies - and does not clamp positive transients on grounded lines.
What is the maximum clamping voltage of the SA11AH at rated surge current?
The SA11AH has a maximum clamping voltage (VC) of 20.1 V at 26 A peak pulse current (IPPM), measured under the standard 10/1000μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 20.1 V during worst-case surge events, well below typical 24V system absolute maximum ratings.
Can the SA11AH replace the SA11A in an existing design?
Yes, the SA11AH is a direct form-fit-function replacement for SA11A - same DO-204AC package, identical electrical parameters (VWM = 11 V, VBR = 12.2–13.5 V, VC = 18.2 V), and compatible soldering profile. However, SA11AH adds AEC-Q101 qualification, so migration requires revalidation only for automotive qualification documentation, not hardware changes.
What is the junction temperature limit and thermal derating behavior of the SA11AH?
The SA11AH has a maximum junction temperature (TJ) of +175°C and follows standard derating curves per Figure 2 in the datasheet: peak pulse power decreases linearly above +25°C ambient, reaching ~50% of 500W at +100°C case temperature. This enables reliable operation in under-hood environments where PCB temperatures routinely exceed +100°C.
SA11AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
SA11AH FAQ
1.How can I place an order for SA11AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11AH 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 SA11AH reliable?
The price and inventory of SA11AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11AH is usually 5 days.
3.What payment methods are accepted for SA11AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11AH?
SA11AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11AH 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 SA11AH?
For technical support, including SA11AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11AH requirements.
6.How does Aetrix verify that SA11AH is sourced from the original manufacturer or authorized distributors?
All SA11AH 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 SA11AH meets industry standards.
7.What is the process for return or replacement of SA11AH?
All SA11AH units undergo pre-shipment inspection (PSI). If there is an issue with SA11AH, 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 SA11AH part is unused and in its original packaging.
Return procedure for SA11AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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