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Taiwan Semiconductor Corporation SA11
- Part No.:
- SA11
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11.pdf
- Description:
- 500W, 13.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
SA11 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), 20.1V clamping voltage (VC) at 26A peak pulse current, and <1μA reverse leakage above 10V - designed for automotive and industrial ESD/inductive-spike protection of 12V power rails and signal lines.
For engineers reviewing the SA11 datasheet, SA11 pinout, SA11 application, or SA11 equivalent, key selection criteria include its 20.1V clamping performance at 26A (10/1000μs), AEC-Q101 qualification option (SA11H), DO-15 mechanical compatibility, and unidirectional polarity marking for correct PCB orientation in DC-biased protection circuits.
Technical Context
The SA11 operates as a silicon avalanche diode, triggering when transient voltage exceeds its 12.2–14.9V breakdown range at 1mA test current. Its low dynamic impedance enables rapid energy shunting during fast transients, with sub-nanosecond response (<1.0ps from 0V to VBR) and thermal stability up to TJ = +175°C.
Rated for 500W peak pulse power (10/1000μs waveform), it sustains 70A non-repetitive forward surge (8.3ms half-sine) and delivers 3.5V max forward voltage at 35A - confirming suitability for high-energy load-dump and inductive switching suppression in 12V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets operating margin for 12V nominal systems. |
| VBR @ IT=1mA | 12.2–14.9 V - Breakdown threshold range where avalanche conduction begins; defines minimum overvoltage trip point. |
| VC @ IPPM=26A | 20.1 V - Clamped voltage during 500W transient; limits downstream IC stress to safe levels under worst-case surge. |
| PPK | 500 W - Peak pulse power handling per 10/1000μs waveform; validates robustness against ISO 7637-2 Pulse 1/2a/5a events. |
| IR @ VWM | <1 μA - Reverse leakage at 11V; ensures negligible standby current drain in battery-powered applications. |
| TJ MAX | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding, and 0.4g mass. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground or return path | Completes conduction path during transient clamp; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | High-side connection to protected line (e.g., 12V rail or signal) | Marked by band; connects to vulnerable node - reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available (SA11H) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, body electronics, and ADAS modules. |
| Clamping voltage ≤20.1V at 26A | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute maximum ratings during ISO 16750-2 load dump events. |
| Response time <1.0ps (unidirectional) | Activates before most system-level transients propagate - critical for safeguarding high-speed interfaces like LIN or SENT sensors. |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with automotive and industrial environmental mandates without compromising surge robustness or thermal performance. |
| Steady-state power dissipation: 3W at TL=75°C | Supports continuous operation in thermally constrained enclosures using standard 10×10 mm copper pads per lead. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump transients on 12V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes up to ±125V. Use Value: Limits clamped voltage to 20.1V, preventing damage to 36V-rated DC-DC converters and MCU power supplies. |
Use Scenario: Protecting analog sensor inputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1μA) TVS mounted at connector entry point to shunt fast transients before signal conditioning circuitry. Use Value: Sub-nanosecond response prevents latch-up in precision op-amps and ADC front-ends exposed to IEC 61000-4-2 contact discharge. |
| Inductive Load Switching Protection | Lighting System Surge Suppression |
Use Scenario: Safeguarding MOSFET gate drivers controlling solenoids, relays, or fuel injectors. IC Role / Device Role / Timing Role: TVS connected across inductive coil to absorb flyback energy during turn-off. Use Value: 500W rating handles repetitive 70A surge currents (8.3ms half-sine), extending driver lifetime in 12V chassis systems. |
Use Scenario: Shielding LED driver ICs in automotive headlamps and interior lighting from alternator ripple and jump-start surges. IC Role / Device Role / Timing Role: Standoff voltage (11V) matches nominal 12V supply while clamping transients to 20.1V. Use Value: Enables use of cost-effective 24V-rated LEDs and drivers without overdesigning voltage margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ11A | Same DO-214AC package; 11V VWM, 12.2–14.7V VBR, 19.9V VC @ 26.3A - slightly lower clamping voltage but no AEC-Q101 option. | Preferred for commercial industrial designs where automotive qualification is not required and tighter VC tolerance is critical. | Select SMAJ11A if board space allows SMC/SMA footprint and AEC-Q101 is unnecessary; SA11 remains optimal for DO-15 legacy layouts and automotive programs. |
| ON Semiconductor 1.5KE11A | Higher-power 1500W rating (1.5kW), DO-201AD package; 11V VWM, 12.2–14.6V VBR, 18.2V VC @ 82.5A - larger footprint and higher capacitance. | Suitable for heavy-duty industrial motor controls requiring higher single-pulse energy absorption, not automotive space-constrained modules. | Choose 1.5KE11A only when surge energy exceeds 500W; SA11 provides better fit for compact 12V automotive nodes with strict thermal and layout constraints. |
Compared with SMAJ11A and 1.5KE11A, the SA11 offers DO-15 compatibility, AEC-Q101 availability (as SA11H), and optimized 20.1V clamping for 12V system protection - making it the preferred choice for automotive Tier-1 suppliers needing drop-in replacement capability and qualification traceability.
Availability
SA11 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and 12V lighting system surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SA11 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 for automotive, industrial, and consumer markets.
The SA Series was developed specifically for high-reliability transient suppression in 12V–48V automotive and industrial power systems, emphasizing AEC-Q101 compliance, tight parametric distribution, and robust surge endurance in DO-15 packaging.
FAQ
What is the clamping voltage of the SA11 under standard 10/1000μs surge conditions?
The SA11 has a maximum clamping voltage (VC) of 20.1 V when subjected to a 26 A peak pulse current with a 10/1000μs waveform. This value is measured at TA = 25°C and reflects the actual voltage seen by downstream circuitry during transient events - a critical parameter for ensuring protected ICs remain within their absolute maximum ratings. The SA11 maintains this performance across its full operating temperature range.
Is the SA11 suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the SA11H variant is explicitly AEC-Q101 qualified and documented in TSC's SA Series datasheet (Version L2105). While the base SA11 part number is not automatically qualified, SA11H meets all stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. For automotive production, specify SA11H to ensure compliance.
How does the SA11 differ from the SA11A variant?
The SA11A features a tighter breakdown voltage range (12.2–13.5 V vs. 12.2–14.9 V for SA11) and lower clamping voltage (18.2 V vs. 20.1 V at rated IPPM), achieved through enhanced process control. Both share identical VWM (11 V), package (DO-15), and surge rating (500W), but SA11A is preferred where stricter VBR consistency and lower VC improve system margin - especially in precision power monitoring circuits.
What is the maximum steady-state power dissipation for the SA11 at elevated temperatures?
The SA11 has a steady-state power dissipation (PD) rating of 3 W when lead temperature (TL) is maintained at 75°C, using 10 × 10 mm copper pads per terminal. Derating follows the curve in Figure 2 of the datasheet: at TL = 100°C, PD drops to ~1.8 W; at TL = 125°C, it falls to ~0.9 W. This thermal profile supports reliable operation in sealed automotive junction boxes and industrial control cabinets.
Can the SA11 be used in bidirectional configurations?
No - the SA11 is a unidirectional TVS diode, indicated by its cathode band marking and specified parameters (e.g., VF = 3.5 V at 35A). For bidirectional protection, select the SA11CA variant (if offered) or use back-to-back SA11 devices. The datasheet explicitly states that "devices for bipolar applications" require C or CA suffixes, and SA11 alone is rated only for unidirectional operation.
SA11 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:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
SA11 FAQ
1.How can I place an order for SA11 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11 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 SA11 reliable?
The price and inventory of SA11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11 is usually 5 days.
3.What payment methods are accepted for SA11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11?
SA11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11 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 SA11?
For technical support, including SA11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11 requirements.
6.How does Aetrix verify that SA11 is sourced from the original manufacturer or authorized distributors?
All SA11 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 SA11 meets industry standards.
7.What is the process for return or replacement of SA11?
All SA11 units undergo pre-shipment inspection (PSI). If there is an issue with SA11, 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 SA11 part is unused and in its original packaging.
Return procedure for SA11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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