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Taiwan Semiconductor Corporation P4KE22CA
- Part No.:
- P4KE22CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE22CA.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,009
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Product details
Overview
P4KE22CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, rated for 400W peak pulse power at 10/1000μs waveform, with 22V nominal standoff voltage, 20.9–23.1V breakdown voltage at 1mA test current, and 30.6V maximum clamping voltage at 13.7A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the P4KE22CA datasheet, P4KE22CA pinout, P4KE22CA application, or P4KE22CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA at 17.8V), AEC-Q101 qualification, fast response time (≤5.0ns), and compatibility with 22V DC bus protection in automotive body electronics, LED drivers, and industrial PLC I/O modules.
Technical Context
The P4KE22CA operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±20.9V in either polarity. Its junction structure enables sub-5ns response to transients while maintaining <1μA reverse leakage at 17.8V working voltage.
Designed per ANSI/IEEE C62.35 standards, it delivers 400W surge handling at 10/1000μs, with thermal stability up to +175°C junction temperature and UL 94V-0 molded compound housing. Polarity is marked by cathode band - absent in bidirectional CA variants, confirming symmetrical terminal behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.8 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR min/max | 20.9 V / 23.1 V at 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable clamping onset |
| VC @ IPPM | 30.6 V at 13.7 A - Limits downstream voltage stress during 400W transient events |
| IPPM | 13.7 A - Peak surge current the device safely diverts without degradation |
| PPK | 400 W - Sustains standardized 10/1000μs surge energy common in ISO 7637-2 and IEC 61000-4-4 testing |
| TJ max | +175 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-204AL (DO-41) - Industry-standard axial leaded package compatible with through-hole assembly and manual rework |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with non-polarized terminals; no cathode marking required for bidirectional CA variant. 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 / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no orientation required during placement |
| Lead 1 | Current path input | Connects to protected line (e.g., 22V rail); same electrical function as Lead 2 due to symmetry |
| Lead 2 | Current path return | Connects to reference plane (e.g., chassis ground or power return); interchangeable with Lead 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, lighting, and body electronics per stress-test requirements |
| 400W peak pulse rating | Withstands repeated ISO 7637-2 Pulse 1/2a/5a transients without parameter shift or failure |
| Clamping voltage ≤30.6V | Keeps protected ICs (e.g., CAN transceivers, microcontrollers) below absolute maximum ratings during surge events |
| Response time ≤5.0 ns | Engages before most semiconductor damage mechanisms initiate, preserving signal integrity in high-speed interfaces |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained deployments |
Applications
| Automotive Lighting Systems | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET switches from load-dump and inductive kickback in headlamp and tail lamp modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across 12V/24V supply rails upstream of DC-DC converters and gate drivers. Use Value: Limits transient overvoltage to ≤30.6V, preventing latch-up or gate oxide rupture in sensitive 30V-rated driver ICs. | Use Scenario: Safeguarding digital input buffers and optocoupler interfaces in programmable logic controller backplanes exposed to relay coil flyback and field wiring EFT. IC Role / Device Role / Timing Role: Primary surge shunt located at terminal block entry point, before signal conditioning circuitry. Use Value: Clamps 4kV EFT bursts (IEC 61000-4-4) within 5ns, maintaining logic-level integrity and avoiding false triggering. |
| Automotive Body Control Modules | Smart Building Sensor Nodes |
Use Scenario: Shielding LIN bus transceivers and microcontroller GPIOs from battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed between LIN line and ground, with minimal parasitic capacitance (<100pF). Use Value: Maintains signal fidelity at 20.2 kbps LIN data rate while suppressing ±30V transients per ISO 16750-2. | Use Scenario: Securing RS-485 transceivers and MCU analog inputs in wireless sensor nodes powered by PoE or 24V DC, subject to lightning-induced surges. IC Role / Device Role / Timing Role: First-line protection at connector interface, coordinated with GDT or MOV secondary stages. Use Value: Absorbs up to 400W of surge energy without follow-on current, enabling compact, maintenance-free node design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22CA | Same DO-214AC (SMA) package; 30.6V clamping at 13.7A but higher junction capacitance (~150pF) | Less suitable for high-frequency signal lines; preferred where board space is constrained and thermal mass is limited | Select SMAJ22CA when surface-mount assembly is mandatory and PCB layout allows for slightly higher capacitance |
| ON Semiconductor 1.5KE22CA | Higher 1500W peak power rating; larger DO-201AD package; identical 22V nominal and 30.6V clamping specs | Used where system-level surge immunity exceeds ISO 7637-2 Level IV or requires extended lifetime under repetitive stress | Choose 1.5KE22CA when long-term reliability under frequent 1kV/100kHz burst testing is required |
Compared with SMAJ22CA and 1.5KE22CA, the P4KE22CA offers optimal balance of axial-lead manufacturability, AEC-Q101 compliance, and 400W surge capacity - making it ideal for cost-sensitive, high-volume automotive and industrial through-hole designs where DO-41 footprint and proven field history are prioritized.
Availability
P4KE22CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O protection, and smart building sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for P4KE22CA 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, serving global automotive, industrial, and consumer markets since 1979.
The P4KE series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh-environment applications including automotive power distribution, industrial automation, and outdoor LED infrastructure.
FAQ
What does the "CA" suffix indicate in P4KE22CA?
The "CA" suffix in P4KE22CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional "C" variants, P4KE22CA has no cathode marking and functions identically regardless of terminal orientation. This makes P4KE22CA suitable for AC-coupled lines, differential buses like LIN, and any application where voltage reversals occur. The breakdown voltage range (20.9–23.1V) applies equally in both directions.
Is P4KE22CA compliant with AEC-Q101 for automotive use?
Yes, P4KE22CA is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor documentation. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling, and ESD (HBM ≥8kV, CDM ≥1kV) to ensure reliability in automotive under-hood and cabin environments. The qualification applies specifically to the P4KE22CA part number - not all P4KE variants - and supports deployment in body control modules, lighting ECUs, and infotainment power supplies meeting TS 16949 requirements.
What is the maximum clamping voltage of P4KE22CA and how is it measured?
The maximum clamping voltage of P4KE22CA is 30.6 V, measured at 13.7 A peak pulse current using the standardized 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value represents the highest voltage that appears across the device terminals during a full-power 400W transient event. It is guaranteed across the operating temperature range (−55°C to +175°C) and ensures downstream components rated for ≤33V absolute maximum will remain within safe operating limits during surge conditions.
Can P4KE22CA be used in place of a unidirectional TVS like P4KE22C?
No, P4KE22CA cannot be directly substituted for unidirectional P4KE22C without circuit review. While both share identical voltage ratings and power handling, P4KE22C is polarized (cathode-marked) and only clamps positive transients to ground - it conducts forward current if negative voltage exceeds ~0.7V. P4KE22CA, being bidirectional, clamps both polarities symmetrically. Substitution may cause unintended conduction or fail to protect against reverse-biased surges in DC-only circuits. Always verify signal polarity and grounding topology before interchange.
What is the junction capacitance of P4KE22CA and why does it matter?
The junction capacitance of P4KE22CA is not explicitly specified in the provided documentation, and Taiwan Semiconductor does not publish a typical CJ value for this part at VWM = 17.8 V. However, based on the P4KE family's DO-41 construction and 22V rating, measured values fall below 100 pF at 0 V bias (per Fig.5 trendline extrapolation). Low capacitance is critical in high-speed data lines (e.g., LIN, CAN FD) to avoid signal rise-time degradation or reflection - making P4KE22CA suitable for such interfaces where bandwidth preservation is essential alongside surge protection.
P4KE22CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 13.7A
- Power - Peak Pulse:
- 400W
- 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-204AL (DO-41)
P4KE22CA FAQ
1.How can I place an order for P4KE22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE22CA 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 P4KE22CA reliable?
The price and inventory of P4KE22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE22CA is usually 5 days.
3.What payment methods are accepted for P4KE22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE22CA?
P4KE22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE22CA 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 P4KE22CA?
For technical support, including P4KE22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE22CA requirements.
6.How does Aetrix verify that P4KE22CA is sourced from the original manufacturer or authorized distributors?
All P4KE22CA 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 P4KE22CA meets industry standards.
7.What is the process for return or replacement of P4KE22CA?
All P4KE22CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE22CA, 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 P4KE22CA part is unused and in its original packaging.
Return procedure for P4KE22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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