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Taiwan Semiconductor Corporation SA22CAH
- Part No.:
- SA22CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA22CAH.pdf
- Description:
- TVS DIODE 22VWM 46.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,097
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Product details
Overview
SA22CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for automotive and industrial surge protection. It features 22 V working stand-off voltage (VWM), 24.4–29.8 V breakdown voltage (VBR @ 1 mA), 500 W peak pulse power (10/1000 µs), clamping voltage of 38.9 V at 13.0 A, and operating junction temperature up to +175 °C.
For engineers reviewing the SA22CAH datasheet, SA22CAH pinout, SA22CAH application, or SA22CAH equivalent, this page delivers verified electrical parameters, polarity marking guidance, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, and real-world EFT/inductive-switching protection use cases - all critical for automotive-grade circuit hardening.
Technical Context
The SA22CAH is a bidirectional TVS diode with symmetrical avalanche breakdown behavior in both polarities, enabling robust protection against bipolar transients without polarity sensitivity. Its low clamping ratio (VC/VBR ≈ 1.45) and sub-nanosecond response time (<5 ns) ensure fast suppression of ESD and EFT events before downstream ICs are stressed.
It operates across –55 °C to +175 °C junction temperature range and maintains <1 µA reverse leakage above 10 V, supporting low-power system monitoring circuits. The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump) immunity requirements when applied per layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating margin below breakdown. |
| VBR min/max | 24.4 V / 29.8 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V @ 13.0 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs. |
| PPK | 500 W - Peak pulse power handling capability per standard 10/1000 µs waveform; validates robustness against common automotive surges. |
| TJ max | +175 °C - Maximum junction temperature rating; enables deployment in under-hood automotive environments. |
| IR @ VWM | <1 µA - Reverse leakage current at rated stand-off voltage; ensures minimal quiescent power loss in always-on protection circuits. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with tin-plated leads; supports wave and reflow soldering per J-STD-002. |
Pinout & Package
SA22CAH is a two-terminal bidirectional TVS diode in DO-204AC (DO-15) package. Polarity is not applicable - terminals are symmetric and interchangeable. Cathode band marking is omitted per bidirectional construction; physical orientation has no functional impact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals conduct identically during positive or negative overvoltage events; no directional bias required in PCB layout. |
| Leads (Tin-plated) | PCB interconnect | Lead finish meets J-STD-002 solderability; lead length 9.5 mm supports 3 W steady-state dissipation on 10×10 mm copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring high-reliability transient protection. |
| 500 W peak pulse power | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (EFT) without degradation when properly mounted. |
| <5 ns response time (bidirectional) | Activates before most microcontroller I/O pins can be damaged by ESD or fast transients; eliminates need for additional RC filtering. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for automotive supply chains with strict material compliance requirements. |
| 175 °C junction rating | Enables placement near heat sources (e.g., power converters, motor drivers) without thermal derating concerns in automotive modules. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and battery reversal transients in door module ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point, shunting surge energy to ground before reaching sensitive analog front-end or CAN/LIN PHY. Use Value: Maintains signal integrity during 12 V system surges up to ±100 V; prevents latch-up or permanent damage to 5 V-tolerant MCU pins under ISO 16750-2 test conditions. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, operating in parallel with optocoupler input stage to absorb >500 W transient energy. Use Value: Limits voltage seen by input conditioning circuitry to ≤38.9 V during 10/1000 µs surges, ensuring reliable operation without false triggering or component failure. |
| LED Headlamp Driver Protection | Automotive Infotainment USB Port ESD Shielding |
Use Scenario: Guarding buck-boost LED driver ICs against transients induced by alternator ripple and relay switching noise in automotive lighting systems. IC Role / Device Role / Timing Role: Secondary-level TVS placed across driver output stage to clamp inductive spikes generated during PWM dimming transitions. Use Value: Prevents overvoltage stress on MOSFET drain nodes; extends lifetime of high-brightness LED arrays by eliminating cumulative avalanche-induced degradation. | Use Scenario: Providing board-level ESD protection on USB 2.0 data lines (D+/D−) in infotainment head units subjected to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into USB connector footprint to suppress ±8 kV contact discharge per IEC 61000-4-2. Use Value: Delivers sub-5 ns response with <0.5 pF junction capacitance (typical), preserving signal integrity at 480 Mbps without eye diagram distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VWM (22 V), identical DO-214AC package; lower PPK (400 W), higher VC (41.5 V @ 12.5 A). | Not AEC-Q101 qualified; intended for commercial/industrial use only. | Select SMAJ22CA only if automotive qualification is unnecessary and space-constrained SMD layout is preferred over axial DO-15. |
| P6SMB22CA | Same VWM (22 V), DO-214AA package; PPK = 600 W, VC = 35.5 V @ 16.9 A; higher surge rating but larger footprint. | Also AEC-Q101 qualified; better clamping performance but requires larger PCB area and different mounting. | Choose P6SMB22CA when lower clamping voltage and higher surge margin are prioritized over package size and cost. |
Compared with SMAJ22CA and P6SMB22CA, the SA22CAH offers the optimal balance of AEC-Q101 compliance, 500 W surge capability, DO-15 axial form factor for through-hole reliability, and tight clamping voltage - making it especially suited for cost-sensitive, thermally demanding automotive modules where leaded mechanical robustness matters.
Availability
SA22CAH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, LED driver protection, and infotainment ESD shielding requiring stable component supply and full AEC-Q101 traceability.
Supply support for SA22CAH 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 automotive-qualified components since 1979.
The SA Series was developed specifically for high-reliability transient suppression in harsh automotive and industrial environments, emphasizing AEC-Q101 qualification, wide temperature operation, and consistent clamping performance across production lots.
FAQ
What does the "H" suffix in SA22CAH signify?
The "H" suffix in SA22CAH indicates full AEC-Q101 qualification - meaning the device has passed stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing (uHAST), and ESD verification per automotive standards. This certification confirms SA22CAH is approved for use in safety-critical automotive subsystems such as BCMs and ADAS sensor interfaces.
Is SA22CAH unidirectional or bidirectional, and how is polarity marked?
SA22CAH is a bidirectional TVS diode - it provides symmetrical clamping for both positive and negative transients, with no anode/cathode distinction. Per the datasheet, cathode band marking is omitted; the device has no polarity marking and may be installed in either orientation. This simplifies PCB layout and eliminates risk of reverse installation.
What is the maximum clamping voltage of SA22CAH under standard surge conditions?
The maximum clamping voltage of SA22CAH is 38.9 V when subjected to its rated peak pulse current of 13.0 A under the industry-standard 10/1000 µs double-exponential waveform. This value is measured at the device terminals and represents the highest voltage that will appear across protected circuitry during a worst-case surge event.
Can SA22CAH replace SA22A in an existing design?
SA22CAH cannot be considered a direct replacement for SA22A without validation: SA22A is unidirectional and lacks AEC-Q101 qualification, while SA22CAH is bidirectional and AEC-Q101 qualified. Layout changes may be needed due to polarity insensitivity, and system-level testing is required to confirm EFT/ESD immunity remains compliant after substitution.
What packaging options are available for SA22CAH?
SA22CAH is supplied in tape-and-reel format with 3,500 units per reel (ordering code SA22CAH), optimized for automated SMT assembly despite its axial DO-15 package. Alternative ammo box packaging (1,500 units) is available under ordering code SA22CAHA0G for manual or low-volume insertion processes.
SA22CAH 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 14.7A
- 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)
SA22CAH FAQ
1.How can I place an order for SA22CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA22CAH 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 SA22CAH reliable?
The price and inventory of SA22CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA22CAH is usually 5 days.
3.What payment methods are accepted for SA22CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA22CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA22CAH?
SA22CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA22CAH 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 SA22CAH?
For technical support, including SA22CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA22CAH requirements.
6.How does Aetrix verify that SA22CAH is sourced from the original manufacturer or authorized distributors?
All SA22CAH 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 SA22CAH meets industry standards.
7.What is the process for return or replacement of SA22CAH?
All SA22CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA22CAH, 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 SA22CAH part is unused and in its original packaging.
Return procedure for SA22CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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