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Taiwan Semiconductor Corporation P4KE24C
- Part No.:
- P4KE24C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE24C.pdf
- Description:
- 400W, 24V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,946
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Product details
Overview
P4KE24C from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 24V nominal standoff voltage, 21.6–26.4V breakdown range at 1mA test current, 19.4V working peak reverse voltage, and clamps transients to ≤34.7V at 12A peak pulse current. It is used in automotive body control modules to protect CAN transceiver inputs against ISO 7637-2 load dump and EFT bursts.
For engineers reviewing the P4KE24C datasheet, P4KE24C pinout, P4KE24C application, or P4KE24C equivalent, key selection criteria include its DO-41 package compatibility, unidirectional polarity marking, 175°C junction temperature rating, low 1μA leakage at 19.4V, and AEC-Q101 qualification option - all critical for industrial and automotive surge immunity design.
Technical Context
The P4KE24C operates as a silicon avalanche diode with fast-clamping response (<1.0ps rise time from 0V to VBR) and low dynamic impedance. Its unidirectional configuration enables asymmetric protection-blocking reverse conduction while clamping positive transients above VBR-making it suitable for DC-biased interfaces like 24V sensor supply lines.
It complies with ANSI/IEEE C62.35 for 10/1000μs surge waveforms and delivers 400W peak pulse power under standardized conditions. Thermal derating begins at 25°C ambient, with full power sustained only when leads are mounted on 5×5 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 19.4 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin below system rail. |
| VBR @ IT=1mA | 21.6–26.4 V - Breakdown threshold range; ensures reliable triggering across process variation and temperature. |
| VC @ IPPM=12A | ≤34.7 V - Clamped voltage during 10/1000μs surge; defines maximum stress imposed on downstream ICs. |
| IPPM | 12 A - Peak pulse current capacity; determines survivability against 400W surges per standard waveform. |
| IR @ VWM | <1 μA - Reverse leakage at rated standoff; minimizes quiescent power loss in battery-powered systems. |
| TJMAX | 175 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | DO-204AL (DO-41) - Industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding compound. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002; weight ≈0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side protected node | Connected to protected line (e.g., 24V rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Available as P4KE24CH - validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock. |
| 400W surge capability | Rated per 10/1000μs waveform (ANSI/IEEE C62.35); sustains single-event energy without degradation. |
| Fast response time | <1.0 ps rise time from 0V to VBR - ensures clamping initiates before sensitive logic or analog circuitry is stressed. |
| Low clamping ratio | VC/VBR ≈ 1.6 - tight ratio between clamping and breakdown voltages improves protection margin over competing TVS devices. |
| RoHS & halogen-free | Complies with IEC 61249-2-21; supports environmentally compliant manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24V supply inputs of body control units (BCUs) against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 5a (alternator load dump). IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDO regulators and microcontroller power domains. Use Value: Limits transient voltage to ≤34.7V, preventing latch-up or permanent damage to 3.3V/5V logic powered from the same rail. |
Use Scenario: Safeguarding analog outputs of 4–20mA current-loop transmitters exposed to field wiring ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional shunt protector on the loop's positive output terminal, referenced to system ground. Use Value: Maintains <1μA leakage at 19.4V, avoiding interference with precision current regulation while clamping >1kV transients. |
| LED Driver Input Protection | RS-485 Transceiver Bus Line Protection |
|
Use Scenario: Shielding constant-current LED drivers in streetlight controllers from induced surges on AC/DC input stages. IC Role / Device Role / Timing Role: Front-end TVS on bulk DC bus (e.g., 36V intermediate rail), absorbing repetitive 400W pulses. Use Value: Withstands ≥1000 surges at rated power due to robust silicon junction and 175°C thermal rating. |
Use Scenario: Protecting RS-485 transceiver A/B differential lines in factory automation gateways connected to long cable runs. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on each bus line (A-to-ground, B-to-ground), configured with cathode to line. Use Value: Achieves <1.0ps response and 34.7V clamping, preserving signal integrity during 8kV contact ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ24A | Same DO-214AC (SMA) package; 24V bidirectional variant; higher VC = 38.9V at 10.3A. | Requires board redesign for surface-mount layout; bidirectional behavior may increase leakage in DC-coupled circuits. | Select when SMT assembly is required and bidirectional protection is acceptable. |
| ON Semiconductor 1.5KE24A | Higher power rating (1500W); larger DO-201AD package; VC = 36.0V at 41.7A. | Over-specified for 400W use cases; occupies more PCB area and costs more per unit. | Select only when legacy 1.5KE footprint compatibility or higher surge margin is mandatory. |
Compared with SMAJ24A and 1.5KE24A, the P4KE24C offers optimal balance of axial-lead manufacturability, 400W-rated performance, and tight 34.7V clamping - making it preferred for cost-sensitive, through-hole automotive and industrial designs where precise voltage limiting is critical.
Availability
P4KE24C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and LED lighting control requiring stable component supply and long-term lifecycle support.
Supply support for P4KE24C 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, with global distribution and AEC-Q101 validation capabilities.
The P4KE series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robust surge handling, tight parametric tolerances, and extended temperature operation up to 175°C.
FAQ
What is the polarity configuration of the P4KE24C?
The P4KE24C is a unidirectional TVS diode with cathode marked by a band on the DO-41 package. It conducts only when the cathode is at a higher potential than the anode - enabling clamping of positive transients on DC lines while blocking reverse current. This configuration is essential for protecting 24V supply rails where reverse voltage is not expected.
Does the P4KE24C meet AEC-Q101 qualification?
The base P4KE24C is not AEC-Q101 qualified; however, the variant P4KE24CH is fully AEC-Q101 certified for automotive applications. P4KE24CH undergoes additional stress testing including temperature cycling, unbiased HAST, and mechanical shock per AEC-Q101 Rev D, and is marked with "H" suffix and appropriate date code.
What is the maximum clamping voltage of the P4KE24C under surge conditions?
The P4KE24C has a maximum clamping voltage (VC) of 34.7 V at 12 A peak pulse current (IPPM) under the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage seen by downstream circuitry during a worst-case surge event.
How does the P4KE24C compare to bidirectional TVS diodes like P4KE24CA?
The P4KE24C differs from the bidirectional P4KE24CA in having asymmetric conduction: it clamps only positive transients relative to ground, whereas P4KE24CA clamps both polarities. This makes P4KE24C ideal for DC-biased lines where reverse conduction must be avoided - such as 24V power inputs - reducing leakage and simplifying grounding strategy.
What is the thermal derating behavior of the P4KE24C above 25°C ambient?
The P4KE24C's peak pulse power remains at 400W only up to 25°C ambient; above that, it derates linearly per Figure 2 in the datasheet, reaching ~200W at 75°C ambient. Steady-state power dissipation is limited to 1W at 75°C lead temperature, assuming 5×5 mm copper pads per terminal - critical for thermal design in enclosed enclosures.
P4KE24C 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P4KE24C FAQ
1.How can I place an order for P4KE24C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE24C 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 P4KE24C reliable?
The price and inventory of P4KE24C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE24C is usually 5 days.
3.What payment methods are accepted for P4KE24C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE24C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE24C?
P4KE24C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE24C 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 P4KE24C?
For technical support, including P4KE24C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE24C requirements.
6.How does Aetrix verify that P4KE24C is sourced from the original manufacturer or authorized distributors?
All P4KE24C 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 P4KE24C meets industry standards.
7.What is the process for return or replacement of P4KE24C?
All P4KE24C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE24C, 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 P4KE24C part is unused and in its original packaging.
Return procedure for P4KE24C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE24C Tags
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