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Taiwan Semiconductor Corporation P4KE22A
- Part No.:
- P4KE22A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE22A.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
P4KE22A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 22V, a working stand-off voltage of 18.8V, clamps transients to ≤30.6V at 13.7A peak pulse current, and delivers sub-nanosecond response for ESD and EFT immunity in automotive body electronics.
For engineers reviewing the P4KE22A datasheet, P4KE22A pinout, P4KE22A application, or P4KE22A equivalent, key selection criteria include its DO-41 package compatibility with legacy through-hole layouts, low leakage (<1μA at 18.8V), AEC-Q101 qualification option (P4KE22AH), and precise clamping performance under 10/1000μs surge conditions.
Technical Context
The P4KE22A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 20.9–23.1V breakdown range at 1mA test current. Its low dynamic impedance ensures stable clamping during fast transients, while junction temperature capability up to +175°C supports under-hood automotive deployment.
It conforms to ANSI/IEEE C62.35 for peak pulse power rating and uses a DO-204AL (DO-41) glass-passivated package with pure tin-plated leads. The device exhibits a 0.092%/°C VBR temperature coefficient and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 22V - defines rated suppression threshold for 12V system rail protection |
| Breakdown Voltage VBR | 20.9–23.1V @ 1mA - ensures reliable turn-on before downstream IC damage |
| Working Stand-off Voltage VWM | 18.8V - maximum continuous reverse voltage without significant leakage |
| Clamping Voltage VC | ≤30.6V @ 13.7A (10/1000μs) - limits transient voltage seen by protected circuitry |
| Peak Pulse Power PPK | 400W - sustains single high-energy surges per ISO 7637-2 Pulse 1/2/5a |
| Reverse Leakage ID | <1μA @ 18.8V - minimizes standby power loss in always-on systems |
| Response Time | <1.0ps - enables effective suppression of ESD events per IEC 61000-4-2 |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, glass-passivated, RoHS-compliant, halogen-free. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; carries full surge current to earth |
| Cathode | Protected line input | Connected to line being protected (e.g., 12V rail); avalanche conduction occurs between cathode and anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE22AH meets stress testing for automotive under-hood applications including temperature cycling and HTRB |
| Low clamping ratio (VC/VBR) | ~1.47 - tight voltage margin between breakdown and clamping improves system-level surge margin |
| UL Recognized (E326243) | Validates safety compliance for end-equipment certification in industrial and automotive markets |
| 175°C max junction temperature | Enables operation in high-ambient environments such as engine control units and lighting modules |
| Junction capacitance <100pF | Minimizes signal distortion on data lines like LIN or analog sensor inputs when used in parallel |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V supply rail against load dump and alternator ripple in BCM microcontroller power domain. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of LDO regulators and MCU VDD pins. Use Value: Limits transient excursions to ≤30.6V, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from the same rail. |
Use Scenario: Shielding 24V digital input channels from inductive kickback caused by solenoid valve switching. IC Role / Device Role / Timing Role: Front-end surge absorber on optocoupler input side, before series current-limiting resistor. Use Value: Absorbs 400W pulses without degradation, maintaining channel integrity across 100,000+ switching cycles per IEC 61000-4-4 Level 4. |
| LED Headlamp Driver Power Stage | Smart Home Sensor Node Power Rail |
Use Scenario: Safeguarding buck converter MOSFET gates and controller ICs from flyback spikes during PWM dimming. IC Role / Device Role / Timing Role: Parallel-connected TVS across high-side switch drain-source or controller VCC-to-GND. Use Value: Sub-ns response clamps spikes before gate driver propagation delay, eliminating false triggering or overvoltage shutdown. |
Use Scenario: Securing 3.3V battery-backed power rail in Zigbee/Z-Wave sensor nodes against ESD events during handling or installation. IC Role / Device Role / Timing Role: Low-leakage (≤1μA) TVS placed directly at SoC VDD pin, minimizing quiescent current impact. Use Value: Maintains <1μA leakage at 18.8V stand-off, preserving multi-year battery life while passing IEC 61000-4-2 ±8kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A (Bourns) | Surface-mount SMB package (vs. through-hole DO-41); 600W rating; slightly higher VC (35.5V @ 17.1A) | Requires PCB redesign; better suited for space-constrained, high-volume consumer designs | Select SMBJ22A only if SMT assembly and higher surge margin are prioritized over legacy board compatibility |
| 1.5KE22A (ON Semiconductor) | Same DO-41 package; identical VBR (20.9–23.1V) and VC (30.6V); 1500W rating but larger physical size and higher leakage (5μA) | Compatible drop-in replacement with higher surge capacity; not AEC-Q101 qualified | Choose 1.5KE22A when 1500W surge headroom is required and automotive qualification is not mandatory |
Compared with SMBJ22A and 1.5KE22A, the P4KE22A offers optimal balance of proven DO-41 mechanical fit, AEC-Q101 availability, and precise 400W clamping performance for cost-sensitive automotive and industrial replacements where layout change is prohibitive.
Availability
P4KE22A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED lighting drivers, and smart home sensor node designs requiring stable component supply and long-term obsolescence management.
Supply support for P4KE22A 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 applications.
The P4KE series was developed to deliver AEC-Q101-capable, high-reliability TVS protection in standard DO-41 packaging for legacy and new automotive ECUs, lighting systems, and industrial controls demanding proven surge robustness.
FAQ
What is the maximum clamping voltage of the P4KE22A under standard 10/1000μs surge conditions?
The P4KE22A has a maximum clamping voltage (VC) of 30.6V when subjected to a 13.7A peak pulse current with a 10/1000μs waveform. This value is measured at TA = 25°C and represents the upper limit of voltage the device allows to pass through to the protected circuit during a defined transient event, ensuring downstream components remain within safe operating limits.
Is the P4KE22A suitable for bidirectional transient protection?
No, the P4KE22A is a unidirectional TVS diode intended for DC line protection with defined polarity. For bidirectional applications, the P4KE22CA variant must be used - it provides symmetrical clamping in both directions and is explicitly designated with the "CA" suffix per Taiwan Semiconductor's ordering code convention.
Does the P4KE22A meet automotive reliability standards?
Yes - the P4KE22AH variant is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, temperature cycling, and highly accelerated life testing. The standard P4KE22A is not AEC-Q101 certified; qualification status is denoted by the "H" suffix in the ordering code.
What is the reverse leakage current specification for the P4KE22A at its working voltage?
The P4KE22A specifies a maximum reverse leakage current (ID) of 1μA when biased at its working stand-off voltage of 18.8V. This ultra-low leakage ensures minimal power loss in always-on circuits such as automotive wake-up receivers or battery-powered IoT sensors, supporting multi-year operational life without compromising protection integrity.
Can the P4KE22A be used in place of the P4KE22 without design changes?
Yes - the P4KE22A replaces the P4KE22 with tighter VBR tolerance (20.9–23.1V vs. 19.8–24.2V) and lower clamping voltage (30.6V vs. 31.9V), offering improved precision and margin. Both share identical DO-41 packaging, pinout, and thermal ratings, enabling direct substitution without PCB or firmware modifications.
P4KE22A 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4KE22A FAQ
1.How can I place an order for P4KE22A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE22A 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 P4KE22A reliable?
The price and inventory of P4KE22A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE22A is usually 5 days.
3.What payment methods are accepted for P4KE22A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE22A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE22A?
P4KE22A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE22A 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 P4KE22A?
For technical support, including P4KE22A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE22A requirements.
6.How does Aetrix verify that P4KE22A is sourced from the original manufacturer or authorized distributors?
All P4KE22A 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 P4KE22A meets industry standards.
7.What is the process for return or replacement of P4KE22A?
All P4KE22A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE22A, 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 P4KE22A part is unused and in its original packaging.
Return procedure for P4KE22A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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