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Taiwan Semiconductor Corporation SA11CH
- Part No.:
- SA11CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA11CH.pdf
- Description:
- 500W, 13.6V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,735
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Product details
Overview
SA11CH from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 12.2V minimum breakdown voltage (VBR), 11V working stand-off voltage (VWM), and 20.1V maximum clamping voltage (VC) at 26A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SA11CH datasheet, SA11CH pinout, SA11CH application, or SA11CH equivalent, this AEC-Q101 qualified TVS offers verified clamping performance under 10/1000μs surge, low leakage (<1μA @ 11V), fast response (<1.0ps), and robust junction temperature range (–55°C to +175°C) for automotive body electronics, industrial control I/O, and DC power interface hardening.
Technical Context
The SA11CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 12.2–14.9V breakdown range at 1mA test current. It clamps transients to ≤20.1V at 26A (10/1000μs), limiting energy dissipation via low dynamic impedance and sustaining 500W non-repetitive peak power per IEEE C62.35.
Its DO-204AC package supports lead-free soldering (J-STD-002), meets UL 94V-0 flammability, and delivers 70A single half-sine forward surge capability. Polarity is marked by cathode band; operating junction temperature spans –55°C to +175°C with ±11mV/°C VBR temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail voltage. |
| VBR (min/max) | 12.2 V / 14.9 V @ 1 mA - Verified avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 20.1 V @ 26 A - Clamped voltage during 10/1000μs surge; defines worst-case overvoltage seen by protected IC. |
| PPK | 500 W - Peak pulse power handling per single 1ms event; enables protection against ISO 7637-2 Pulse 1/2a/5a transients. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off; minimizes quiescent power loss and avoids false triggering. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TCT, and ESD HBM/MM; suitable for ASIL-B systems. |
Pinout & Package
SA11CH uses the DO-204AC (DO-15) axial-leaded package with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Weight: ~0.400g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return; completes clamping loop during transient events. |
| Cathode | Reverse-biased input / Protected line connection | Connected to the line being protected (e.g., 12V rail); conducts only when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including high-temp operation, thermal cycling, and ESD robustness - no requalification needed for Tier 1 designs. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V without failure; enables single-device protection of 12V/24V systems. |
| Clamping voltage ≤20.1V at 26A | Ensures downstream 3.3V/5V logic ICs remain within absolute maximum ratings during transients - eliminates need for secondary clamping. |
| Response time <1.0ps | Activates faster than most microsecond-scale transients; prevents voltage overshoot before protection engages. |
| RoHS & halogen-free compliance | Fulfills IEC 61249-2-21 and EU RoHS requirements for green manufacturing and end-of-life processing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from battery line transients during ignition switching and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V supply rail and ground, clamping spikes before they reach sensitive analog front-ends. Use Value: Maintains system uptime by preventing latch-up or permanent damage to 5V-tolerant MCU pins during ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump). |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to field wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, absorbing 1kV/500A surges while preserving signal integrity for optocoupler isolation stages. Use Value: Eliminates false triggering and extends maintenance intervals by reducing input stage failures caused by repetitive EFT bursts per IEC 61000-4-4. |
| LED Headlamp Driver Power Rail | Automotive Infotainment USB Port ESD Clamp |
Use Scenario: Suppressing inductive kickback from buck converter MOSFETs and alternator ripple in LED driver power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the 12V input rail upstream of DC-DC converters, activated within picoseconds of overvoltage onset. Use Value: Prevents catastrophic failure of high-side gate drivers and current-sense amplifiers by limiting rail excursions to ≤20.1V during 500W surges. |
Use Scenario: Providing secondary-level ESD protection on USB VBUS and D+/D− lines in infotainment head units subjected to ±15kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line, coordinated with integrated USB transceiver ESD diodes for cascaded protection. Use Value: Passes IEC 61000-4-2 Level 4 testing without signal degradation or latch-up, enabling full-speed USB 2.0 operation post-ESD event. |
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 | Unidirectional, 11V VWM, 18.2V VC @ 28A, 400W rating, SMA package | Lower surge rating and smaller footprint; not AEC-Q101 qualified | Use where space-constrained PCB layout prioritizes SMT over axial leads and automotive qualification is not required. |
| 1.5KE11CA | Bidirectional, 11V VWM, 19.9V VC @ 26.3A, 1500W rating, DO-201 package | Higher power but bidirectional; larger DO-201 case; no AEC-Q101 validation | Select when protecting AC-coupled or symmetric signal lines requiring dual-polarity clamping, and higher surge margin justifies larger footprint. |
Compared with SMAJ11A and 1.5KE11CA, SA11CH uniquely combines AEC-Q101 qualification, 500W unidirectional clamping in DO-15, and tight VC (20.1V) - making it optimal for cost-sensitive, high-reliability 12V automotive power rail protection where axial mounting and automotive compliance are mandatory.
Availability
SA11CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and LED lighting power supplies requiring stable component supply with long-term lifecycle assurance and traceable sourcing.
Supply support for SA11CH 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 - serving automotive, industrial, and consumer markets since 1979.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing low clamping voltage, high surge robustness, and consistent parametric stability across temperature and production lots.
FAQ
What is the AEC-Q101 qualification status of SA11CH?
The SA11CH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in the SA Series datasheet Version L2105. This includes stress testing for high-temperature operating life, temperature cycling, and ESD robustness - making SA11CH suitable for automotive applications such as body control modules and lighting drivers without additional qualification effort.
Does SA11CH have bidirectional or unidirectional polarity?
SA11CH is a unidirectional TVS diode, indicated by absence of "CA" or "C" suffix and presence of cathode band marking per DO-204AC mechanical drawing. Its electrical characteristics - including VBR, VC, and IPPM - apply only in reverse bias; forward conduction follows standard silicon diode behavior with VF ≤3.5V at 35A.
What is the maximum clamping voltage of SA11CH under surge conditions?
The SA11CH clamps to a maximum of 20.1V at 26A peak pulse current (10/1000μs waveform), as specified in the "Maximum clamping voltage VC@IPPM" row of the SA Series electrical characteristics table. This value is guaranteed across temperature and production lot, ensuring downstream 5V or 3.3V ICs remain within absolute maximum ratings during transients.
Can SA11CH replace SA11A in an existing design?
No - SA11CH and SA11A are not interchangeable. SA11CH is AEC-Q101 qualified with tighter VBR (12.2–14.9V) and lower VC (20.1V), whereas SA11A has VBR 12.2–13.5V and VC 18.2V. Substituting SA11CH for SA11A may alter clamping behavior and requires validation of surge margin, especially in non-automotive applications where qualification overhead is unnecessary.
What packaging options are available for SA11CH?
SA11CH is supplied in DO-204AC (DO-15) package with two packing options: 3,500 units per tape-and-reel (ordering code SA11CH) and 1,500 units per ammo box (ordering code SA11CHA0G). Both options feature pure tin-plated leads compliant with J-STD-002 and meet UL 94V-0 flammability requirements.
SA11CH 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:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
SA11CH FAQ
1.How can I place an order for SA11CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA11CH 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 SA11CH reliable?
The price and inventory of SA11CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA11CH is usually 5 days.
3.What payment methods are accepted for SA11CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA11CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA11CH?
SA11CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA11CH 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 SA11CH?
For technical support, including SA11CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA11CH requirements.
6.How does Aetrix verify that SA11CH is sourced from the original manufacturer or authorized distributors?
All SA11CH 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 SA11CH meets industry standards.
7.What is the process for return or replacement of SA11CH?
All SA11CH units undergo pre-shipment inspection (PSI). If there is an issue with SA11CH, 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 SA11CH part is unused and in its original packaging.
Return procedure for SA11CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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