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Taiwan Semiconductor Corporation SA11A
- Part No.:
- SA11A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11A.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,039
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Product details
Overview
SA11A from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 11V working stand-off voltage, 12.2–13.5V breakdown voltage at 1mA test current, and 18.2V clamping voltage at 28A peak pulse current. It features sub-1ps response time, <1μA reverse leakage above 10V, and is housed in DO-204AC (DO-15) package for automotive-grade ESD and surge protection in power supply rails.
For engineers reviewing the SA11A datasheet, SA11A pinout, SA11A application, or SA11A equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world use cases in lighting and inductive load circuits, and two validated alternative parts - all aligned to AEC-Q101 qualified TVS requirements for automotive and industrial systems.
Technical Context
The SA11A operates as a unidirectional avalanche diode, triggered when transient voltage exceeds its 12.2–13.5V breakdown range under 1mA DC test current. Its low dynamic impedance enables rapid clamping to ≤18.2V at 28A (10/1000μs waveform), limiting energy dissipation in protected ICs.
Designed for single-polarity transients, it exhibits <1μA reverse leakage at 11V stand-off and supports junction temperatures from –55°C to +175°C. The device meets RoHS and halogen-free standards per IEC 61249-2-21 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min/max | 12.2 V / 13.5 V - Breakdown occurs within this range at 1 mA, defining turn-on threshold tolerance |
| VC @ IPPM | 18.2 V at 28 A - Clamped voltage during 10/1000μs surge, directly limiting stress on downstream circuitry |
| PPK | 500 W - Peak pulse power handling capability under standardized 10/1000μs waveform |
| IR @ VWM | <1 μA - Negligible leakage current ensures minimal standby power loss and signal integrity |
| TJ max | +175 °C - Enables reliable operation in under-hood automotive and high-temperature industrial environments |
| Response time | <1.0 ps - Near-instantaneous avalanche initiation prevents transient propagation to sensitive nodes |
Pinout & Package
SA11A is packaged in DO-204AC (DO-15), a radial-leaded, epoxy-molded case with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002; weight is 0.400 g. Polarity is unidirectional, with cathode indicated by a band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes conduction path during clamping |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12V supply); avalanche initiates here when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 500W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation |
| <1μA IR at 11V | Enables use in always-on circuits without measurable standby current penalty |
| DO-204AC (DO-15) package | Industry-standard footprint compatible with legacy PCB layouts and automated assembly |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed automotive and industrial enclosures |
Applications
| Automotive Lighting Systems | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting LED driver ICs from load-dump transients in 12V vehicle lighting circuits. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground to clamp positive-going spikes up to 500W. Use Value: Limits clamped voltage to 18.2V, preventing damage to 24V-tolerant drivers while maintaining AEC-Q101 compliance. | Use Scenario: Safeguarding digital input optocouplers in programmable logic controllers exposed to inductive kickback from solenoids. IC Role / Device Role: Standoff-rated TVS on 24V DC input lines, absorbing 28A surges induced by relay coil de-energization. Use Value: Sub-1ps response ensures clamping before optocoupler input stage fails; DO-15 package fits standard DIN-rail module footprints. |
| Consumer Power Adapters | Smart Building Sensor Nodes |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role: Unidirectional TVS across output rails to absorb fast transients from switching noise or hot-plug events. Use Value: 11V VWM aligns with 12V nominal outputs; 18.2V VC prevents latch-up in USB-PD controller ICs rated to 20V absolute maximum. | Use Scenario: ESD protection for RS-485 transceivers in battery-powered environmental sensors deployed in HVAC ducts. IC Role / Device Role: Rail-to-rail TVS on differential bus lines, leveraging low leakage (<1μA) to avoid draining coin-cell batteries. Use Value: 175°C TJ max supports operation inside thermally insulated ducts; halogen-free construction meets building material compliance. |
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 DO-214AC package; 12.2–13.5V VBR, but 400W PPK and 19.9V VC @ 22.5A | Lower surge rating suits consumer-grade designs; not AEC-Q101 qualified | Select SMAJ11A only if automotive qualification is unnecessary and layout space allows SMA footprint |
| P6SMB11A | DO-214AA package; identical 12.2–13.5V VBR and 500W rating, but 19.0V VC @ 26.3A and higher IR (5μA) | Higher clamping voltage increases risk to 18V-tolerant ICs; suited for less sensitive industrial interfaces | Prefer P6SMB11A when DO-214AA mounting is required and 19.0V clamping is acceptable for system margin |
Compared with SMAJ11A and P6SMB11A, the SA11A delivers lower clamping voltage (18.2V vs. ≥19.0V) and AEC-Q101 qualification - critical for automotive signal integrity and long-term reliability where transient energy must be limited below 18.5V thresholds.
Availability
SA11A is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC input stages, and consumer power adapter designs requiring stable component supply, AEC-Q101 validation, and DO-15 through-hole compatibility.
Supply support for SA11A 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, and power MOSFETs for automotive and industrial markets.
The SA Series was developed specifically for high-reliability transient suppression in automotive power networks and industrial control systems, emphasizing AEC-Q101 compliance, low clamping voltage, and robust surge endurance in DO-15 packaging.
FAQ
What is the breakdown voltage range of the SA11A?
The SA11A has a guaranteed breakdown voltage range of 12.2 V to 13.5 V at 1 mA test current, measured per ANSI/IEEE C62.35. This defines the minimum and maximum voltage at which the device enters avalanche conduction under DC conditions, ensuring predictable turn-on behavior in overvoltage protection circuits.
Is the SA11A suitable for bidirectional transient protection?
No, the SA11A is a unidirectional TVS diode intended only for positive-going transients on DC rails. For bidirectional protection, select the SA11CA variant - the "CA" suffix denotes bidirectional configuration, whereas SA11A is strictly unidirectional with cathode-band polarity marking.
Does the SA11A meet automotive qualification standards?
Yes, the SA11A is AEC-Q101 qualified when ordered with the "H" suffix (e.g., SA11AH). Standard SA11A parts are not automatically qualified; AEC-Q101 validation applies only to versions explicitly marked and tested per the AEC-Q101 stress test plan, including temperature cycling, humidity bias HAST, and mechanical shock.
What is the maximum clamping voltage of the SA11A during a surge event?
The SA11A clamps to a maximum of 18.2 V when subjected to a 28 A peak pulse current under the 10/1000 μs waveform. This value is specified in the datasheet's "Maximum clamping voltage VC@IPPM" table and represents the worst-case voltage seen by downstream components during standardized surge testing.
Can the SA11A be used in surface-mount designs?
No, the SA11A is exclusively offered in the through-hole DO-204AC (DO-15) package. It is not available in SMD variants like SMA or SMB. For surface-mount equivalents with similar electrical specs, consider the SMAJ11A (DO-214AC) or P6SMB11A (DO-214AA), though neither carries AEC-Q101 qualification by default.
SA11A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA11A FAQ
1.How can I place an order for SA11A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11A 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 SA11A reliable?
The price and inventory of SA11A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11A is usually 5 days.
3.What payment methods are accepted for SA11A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11A?
SA11A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11A 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 SA11A?
For technical support, including SA11A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11A requirements.
6.How does Aetrix verify that SA11A is sourced from the original manufacturer or authorized distributors?
All SA11A 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 SA11A meets industry standards.
7.What is the process for return or replacement of SA11A?
All SA11A units undergo pre-shipment inspection (PSI). If there is an issue with SA11A, 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 SA11A part is unused and in its original packaging.
Return procedure for SA11A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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