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Taiwan Semiconductor Corporation P4KE24CA
- Part No.:
- P4KE24CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE24CA.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,023
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Product details
Overview
P4KE24CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in DC power rails and signal lines. It features a 24V nominal standoff voltage, 33.2V maximum clamping voltage at 12.6A peak pulse current, 400W peak pulse power rating at 10/1000μs waveform, and DO-204AL (DO-41) axial package - deployed in automotive lighting control modules to safeguard CAN transceivers against load-dump-induced transients.
For engineers reviewing the P4KE24CA datasheet, P4KE24CA pinout, P4KE24CA application, or P4KE24CA equivalent, key selection considerations include its bidirectional clamping behavior, 175°C maximum junction temperature, <1μA reverse leakage at 20.5V, AEC-Q101 qualification option (P4KE24CAH), and compatibility with JESD201 Class 2 whisker resistance requirements.
Technical Context
The P4KE24CA operates as a voltage-clamped avalanche diode, triggering conduction when transient voltage exceeds its 22.8–25.2V breakdown range (tested at 1mA). Its bidirectional symmetry enables identical clamping performance in both polarities, eliminating need for polarity-aware placement in AC-coupled or floating interfaces.
It delivers 400W surge handling per ANSI/IEEE C62.35 10/1000μs waveform, with fast response time (<5ns for bidirectional mode), low dynamic impedance, and thermal stability across –55°C to +175°C operating range - supporting under-hood automotive environments where thermal derating must be managed without external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe DC operating margin. |
| VBR min/max | 22.8 V / 25.2 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 33.2 V - Clamping voltage measured at 12.6 A peak pulse; limits downstream IC stress during surge events. |
| PPK | 400 W - Peak pulse power dissipation capability at 10/1000μs waveform; meets ISO 7637-2 Pulse 5a requirements. |
| IPPM | 12.6 A - Maximum non-repetitive peak pulse current supported; determines minimum series impedance needed for compliance. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in high-ambient under-hood locations without forced cooling. |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with tin-plated leads compliant to J-STD-002 solderability. |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking for unidirectional variants; P4KE24CA is bidirectional and has no polarity marking - terminals are electrically symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no PCB orientation constraint required. |
| Lead 1 / Lead 2 | Current path for surge conduction | Leads conduct full IPPM during clamping; require ≥0.375" (9.5 mm) lead length for rated 1W steady-state dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE24CAH meets automotive stress testing including temperature cycling, HTRB, and ESD - validated for engine control unit (ECU) front-end protection. |
| Low clamping ratio (VC/VBR) | 1.31 typical (33.2V / 25.2V) - minimizes overvoltage exposure to protected ICs versus competing 1.4–1.6 ratios. |
| Ultra-low leakage current | <1 μA at 20.5 V - avoids parasitic loading on low-power sensor bias networks or battery-backed circuits. |
| Fast bidirectional response | <5 ns turn-on time - ensures clamping activation before transient energy couples into sensitive analog or communication circuitry. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and UL 94V-0 - supports environmental compliance for global automotive and industrial OEMs. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp modules subjected to load-dump transients up to 120V. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VCC-GND input rail to clamp surges before they reach LDO regulators and CAN PHYs. Use Value: Limits peak rail voltage to ≤33.2V during 12.6A transients, preventing latch-up or gate oxide damage in 3.3V/5V logic. | Use Scenario: Safeguarding 24V digital input channels in programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: TVS connected between field input and internal optocoupler/analog front-end to absorb >400W energy spikes. Use Value: Enables reliable operation without external snubbers or varistors, reducing BOM count and board space by 30%. |
| USB-C Power Delivery Interface | Smart Meter Communication Port |
Use Scenario: Protecting CC and VCONN lines in USB-C receptacles against ESD events per IEC 61000-4-2 ±15kV contact discharge. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector pins to shunt ESD current before it reaches USB PD controller. Use Value: Achieves pass-level immunity with <1μA leakage - avoids interference with 5V/3.3V level-shifting and CC line voltage sensing. | Use Scenario: Shielding RS-485 transceivers in electricity meters from lightning-induced surges on long outdoor data lines. IC Role / Device Role / Timing Role: TVS installed differential-mode across A/B bus lines and common-mode across A/GND and B/GND. Use Value: Maintains signal integrity with 33.2V clamping while surviving repeated 10/1000μs surges up to 400W per line pair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA (Bourns) | Same 24V nominal, 33.2V clamping, but SMC package (surface-mount); 600W rating vs. 400W. | Requires rework of PCB layout for SMD footprint; better suited for space-constrained designs with higher surge margin. | Select SMBJ24CA only if board real estate is limited and 600W surge headroom is required. |
| 1.5KE24CA (ON Semiconductor) | Same DO-41 package and 24V rating, but 1500W peak power; larger junction area increases capacitance (≈100 pF vs. ≈50 pF). | Higher clamping voltage (36.2V) and greater junction capacitance may degrade high-speed signal integrity in USB or CAN lines. | Prefer 1.5KE24CA for legacy 1500W surge standards where speed is not critical; avoid in high-frequency interfaces. |
Compared with SMBJ24CA and 1.5KE24CA, the P4KE24CA offers optimal balance of through-hole manufacturability, 400W surge capability, low capacitance, and AEC-Q101 availability - making it ideal for cost-sensitive, thermally demanding automotive and industrial control applications requiring proven reliability and easy hand-soldering.
Availability
P4KE24CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O modules, USB-C power delivery interfaces, and smart meter communication ports requiring stable component supply across multi-year production cycles.
Supply support for P4KE24CA 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 certification capabilities.
The P4KE Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing thermal robustness, low leakage, and consistent clamping performance across wide temperature ranges.
FAQ
What is the maximum clamping voltage of the P4KE24CA under standard surge conditions?
The P4KE24CA exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its rated 12.6 A peak pulse current (IPPM) under the 10/1000μs waveform defined in ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and ensures downstream components remain below their absolute maximum voltage ratings during transient events. The P4KE24CA maintains this clamping performance in both polarities due to its bidirectional construction.
Is the P4KE24CA suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the P4KE24CAH variant is explicitly AEC-Q101 qualified and listed in Taiwan Semiconductor's automotive-grade product portfolio. While the base P4KE24CA is not certified, the "H" suffix denotes full qualification including temperature cycling, highly accelerated life testing (HALT), and ESD robustness validation. For automotive ECU, body control module, or lighting applications, specify P4KE24CAH to ensure compliance with automotive reliability standards. The P4KE24CA itself remains suitable for industrial use where AEC-Q101 is not mandated.
How does the P4KE24CA compare to unidirectional TVS diodes like P4KE24A in terms of circuit implementation?
The P4KE24CA is bidirectional and requires no polarity awareness during placement, whereas the unidirectional P4KE24A must be oriented with its cathode band toward the positive rail. In AC-coupled or floating signal paths - such as RS-485 buses or USB-C CC lines - the P4KE24CA eliminates orientation errors and simplifies assembly. However, in DC-only applications with strict leakage budgets, P4KE24A may offer slightly lower reverse leakage (<0.5 μA vs. <1 μA) at its VWM, though both meet typical system requirements. The P4KE24CA's symmetric behavior makes it the preferred choice for mixed-polarity transient environments.
What is the junction capacitance of the P4KE24CA, and how does it affect high-speed signal lines?
The P4KE24CA exhibits a typical junction capacitance of approximately 50 pF at 0 V bias (measured at 1 MHz), which is significantly lower than higher-power alternatives like 1.5KE24CA (~100 pF). This low capacitance minimizes signal distortion and reflection on high-speed lines such as USB 2.0, CAN FD, or I²C - enabling direct placement at connectors without degrading rise/fall times. For designs operating above 10 MHz, the P4KE24CA's capacitance remains within acceptable limits, preserving signal integrity while delivering full 400W surge protection. Always verify with actual board-level TDR measurements when used on critical high-speed traces.
Can the P4KE24CA be used in parallel to increase surge current handling capacity?
No - the P4KE24CA should not be paralleled without individual current-sharing resistors, as minor VBR tolerances (22.8–25.2 V) cause uneven current division during transients, risking thermal runaway in the lower-breakdown unit. Unlike MOSFETs or precision shunts, TVS diodes lack inherent current-balancing characteristics. To achieve higher IPPM, select a single higher-rated device such as 1.5KE24CA (1500W) or SMBJ24CA (600W), or implement staged protection with upstream MOVs and downstream low-capacitance TVS like P4KE24CA. The P4KE24CA is optimized for standalone 400W protection in compact through-hole layouts.
P4KE24CA 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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)
P4KE24CA FAQ
1.How can I place an order for P4KE24CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE24CA 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 P4KE24CA reliable?
The price and inventory of P4KE24CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE24CA is usually 5 days.
3.What payment methods are accepted for P4KE24CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE24CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE24CA?
P4KE24CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE24CA 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 P4KE24CA?
For technical support, including P4KE24CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE24CA requirements.
6.How does Aetrix verify that P4KE24CA is sourced from the original manufacturer or authorized distributors?
All P4KE24CA 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 P4KE24CA meets industry standards.
7.What is the process for return or replacement of P4KE24CA?
All P4KE24CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE24CA, 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 P4KE24CA part is unused and in its original packaging.
Return procedure for P4KE24CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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