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Taiwan Semiconductor Corporation P4KE24A
- Part No.:
- P4KE24A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE24A.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,954
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Product details
Overview
P4KE24A 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 breakdown voltage, 20.5V working stand-off voltage, 33.2V maximum clamping voltage at 12.6A peak pulse current, and <1.0ps response time - deployed in automotive body control modules, industrial PLC I/O protection, and LED driver input stages.
For engineers reviewing the P4KE24A datasheet, P4KE24A pinout, P4KE24A application, or P4KE24A equivalent, key selection criteria include clamping ratio (VC/VWM = 1.62), low leakage (<1μA at 20.5V), AEC-Q101 qualification option (P4KE24AH), DO-41 mechanical compatibility, and 175°C junction temperature rating for under-hood deployment.
Technical Context
The P4KE24A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 22.8–25.2V breakdown range at 1mA test current. Its low dynamic impedance ensures rapid energy diversion during 10/1000μs transients, maintaining system integrity under ISO 7637-2 Pulse 1/2a/5a stress profiles.
Thermal design relies on its 1W steady-state dissipation capability at 75°C lead temperature, supported by DO-41 package thermal resistance (RθJL ≈ 100°C/W). The device exhibits +0.094%/°C VBR temperature coefficient, enabling predictable voltage drift across -55°C to +175°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 24V - defines rated suppression threshold for 24V DC systems |
| Breakdown Voltage VBR | 22.8–25.2V @ 1mA - verified avalanche onset range ensuring reliable triggering |
| Working Stand-off Voltage VWM | 20.5V - maximum continuous reverse voltage before leakage exceeds 1μA |
| Clamping Voltage VC | 33.2V @ 12.6A - peak voltage seen by protected circuit during 400W transient |
| Peak Pulse Power | 400W @ 10/1000μs - standardized surge handling per ANSI/IEEE C62.35 |
| Junction Temperature Range | -55°C to +175°C - supports under-hood, motor drive, and industrial ambient conditions |
| Response Time | <1.0ps - enables protection against ESD and fast-rising transients (IEC 61000-4-2) |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking; 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 | 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., 24V rail); blocks normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE24AH meets automotive stress testing for temperature cycling, HTRB, and ESD robustness |
| Low clamping ratio | VC/VWM = 1.62 ensures minimal overvoltage exposure to downstream ICs |
| Ultra-fast response | <1.0ps turn-on enables protection against sub-nanosecond ESD events |
| High surge reliability | 400W rating at 10/1000μs waveform supports repeated surge exposure without degradation |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and UL 94V-0 flammability for environmentally regulated designs |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: 12V/24V supply rail exposed to load dump and alternator ripple in BCM ECUs. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers. Use Value: Limits transient excursions to ≤33.2V, preventing latch-up or gate oxide damage in 3.3V/5V logic. |
Use Scenario: 24V digital input channel subject to inductive kickback from solenoid/relay coils. IC Role / Device Role / Timing Role: Fast-acting shunt protector parallel to optocoupler input stage. Use Value: Clamps 12.6A surge within 1ps, preserving optocoupler CTR and isolation barrier integrity. |
| LED Driver Front-End Protection | Telecom Power Interface |
Use Scenario: Constant-current LED driver input subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line defense before input capacitor and controller IC. Use Value: Absorbs 400W pulses without derating, maintaining driver uptime in outdoor lighting applications. |
Use Scenario: 24V telecom power interface exposed to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Low-capacitance TVS on power entry point before DC-DC converter. Use Value: Sub-1pF junction capacitance avoids signal integrity impact while delivering 33.2V clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A (Bourns) | DO-214AA package, 600W rating, 36.2V clamping at 16.7A, higher thermal mass | Better suited for PCB space-constrained layouts requiring surface-mount assembly | Select SMBJ24A when SMT placement, higher surge margin, or lower profile is required |
| 1.5KE24A (ON Semiconductor) | Same DO-41 package, 1500W rating, 38.9V clamping at 38.8A, higher leakage (5μA @ 20.5V) | Used where legacy 1.5kW surge compliance (e.g., MIL-STD-1275) is mandated | Choose 1.5KE24A only if 1500W surge level is explicitly required and higher VC is acceptable |
Compared with SMBJ24A and 1.5KE24A, the P4KE24A offers optimal balance of axial-leaded manufacturability, 400W surge headroom for ISO 16750-2, and tight 33.2V clamping - making it ideal for cost-sensitive, high-volume 24V industrial and automotive modules where DO-41 footprint is standardized.
Availability
P4KE24A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and LED driver front-end surge suppression requiring stable component supply across multi-year production cycles.
Supply support for P4KE24A 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, specializing in power management, protection, and signal conditioning devices.
The P4KE series belongs to TSC's transient voltage suppressor product line, engineered specifically for robust, cost-effective overvoltage protection in automotive, industrial, and consumer power systems with stringent AEC-Q101 and RoHS compliance requirements.
FAQ
What is the clamping voltage of P4KE24A at its rated peak pulse current?
The P4KE24A has a maximum clamping voltage (VC) of 33.2V at 12.6A peak pulse current (IPPM), measured under the standard 10/1000μs waveform. This value ensures protected circuits experience no more than 33.2V during a 400W transient event, directly supporting 24V system reliability. The P4KE24A maintains this performance across its full operating temperature range.
Is P4KE24A suitable for automotive applications?
Yes - the P4KE24A is available in an AEC-Q101 qualified version (P4KE24AH) that passes rigorous automotive qualification tests including temperature cycling, highly accelerated life testing (HALT), and ESD immunity. While the base P4KE24A is not AEC-Q101 certified, its 175°C TJ max, DO-41 mechanical robustness, and low leakage make it widely used in non-safety-critical automotive subsystems such as lighting and body control modules.
How does P4KE24A differ from P4KE24?
The P4KE24A features tighter breakdown voltage tolerance (22.8–25.2V) versus P4KE24 (21.6–26.4V), lower clamping voltage (33.2V vs. 34.7V), and higher IPPM (12.6A vs. 12.0A). These improvements result from enhanced process control, yielding better consistency and margin for precision 24V rail protection. Both share identical DO-41 packaging and thermal ratings.
What is the maximum reverse leakage current for P4KE24A at its working voltage?
The P4KE24A exhibits a maximum reverse leakage current (ID) of 1μA at its working stand-off voltage of 20.5V, measured at 25°C. This ultra-low leakage minimizes standby power loss and prevents false triggering in high-impedance sensing circuits. Leakage remains below 5μA up to 125°C, supporting stable operation in thermally demanding environments.
Can P4KE24A be used in bidirectional configurations?
No - the P4KE24A is a unidirectional TVS diode, marked with a cathode band and intended for DC line protection with defined polarity. For bidirectional protection, Taiwan Semiconductor offers the P4KE24CA variant (not P4KE24A), which provides symmetrical clamping in both directions and uses center-tap or dual-diode configuration. Using P4KE24A in reverse-biased AC applications risks permanent failure.
P4KE24A 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):
- 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)
P4KE24A FAQ
1.How can I place an order for P4KE24A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE24A 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 P4KE24A reliable?
The price and inventory of P4KE24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE24A is usually 5 days.
3.What payment methods are accepted for P4KE24A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE24A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE24A?
P4KE24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE24A 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 P4KE24A?
For technical support, including P4KE24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE24A requirements.
6.How does Aetrix verify that P4KE24A is sourced from the original manufacturer or authorized distributors?
All P4KE24A 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 P4KE24A meets industry standards.
7.What is the process for return or replacement of P4KE24A?
All P4KE24A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE24A, 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 P4KE24A part is unused and in its original packaging.
Return procedure for P4KE24A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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