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Taiwan Semiconductor Corporation P4KE33A
- Part No.:
- P4KE33A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE33A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,190
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Product details
Overview
P4KE33A 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 33V nominal breakdown voltage, 28.2V working stand-off voltage, 45.7V maximum clamping voltage at 9.0A peak pulse current, and <1.0ps response time - deployed in automotive body control modules, industrial PLC I/O protection, and AC/DC adapter input stages.
For engineers reviewing the P4KE33A datasheet, P4KE33A pinout, P4KE33A application, or P4KE33A equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, leakage current at operating voltage, surge waveform compatibility (10/1000μs), and DO-41 package thermal derating under sustained ambient conditions.
Technical Context
The P4KE33A operates as a silicon avalanche diode with sharp reverse-breakdown characteristics, triggered when transient voltage exceeds its 31.4–34.7V VBR range at 1mA test current. Its low dynamic impedance ensures rapid voltage clamping during ESD or lightning-induced surges.
It sustains 400W non-repetitive peak pulse power per ANSI/IEEE C62.35 10/1000μs waveform, with thermal limits defined up to TJ = 175°C and steady-state dissipation of 1W at 75°C lead temperature - requiring PCB copper pad thermal management per JESD51-3 guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage; sets upper limit for protected circuit operating voltage. |
| VBR @ 1 mA | 31.4–34.7 V - Measured breakdown voltage range defining turn-on threshold; tight 10% tolerance enables predictable clamping onset. |
| VC @ IPPM | 45.7 V at 9.0 A - Clamped voltage during 10/1000μs surge; determines maximum stress on downstream components. |
| IPPM | 9.0 A - Peak pulse current capability at rated clamping voltage; defines surge energy handling (≈400W × 1ms). |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; critical for low-power sensor or battery-backed circuits. |
| TJMAX | 175 °C - Maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial environments. |
| Package | DO-204AL (DO-41) - Standard axial-leaded package with tin-plated leads; compatible with wave soldering and manual rework. |
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; meets JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential rail; forms return path for clamped surge current. |
| Cathode | Protected line connection | Connected to line being protected (e.g., +12V rail); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive under-hood applications including temperature cycling, mechanical shock, and humidity testing. |
| 400W peak pulse power (10/1000μs) | Handles IEC 61000-4-5 Level 4 surges (4kV line-to-earth) without degradation when properly mounted. |
| Clamping ratio VC/VBR ≈ 1.37 | Low ratio indicates efficient voltage limiting - minimizes overvoltage margin required for protected ICs. |
| Response time <1.0 ps | Enables suppression of nanosecond-scale ESD events before sensitive gate oxides experience damage. |
| RoHS & halogen-free compliant | Meets IEC 61249-2-21 for bromine/chlorine content; suitable for consumer and medical-grade assemblies. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power pins from load-dump transients and ISO 7637-2 pulses. IC Role / Device Role: Primary overvoltage clamp on 12V supply rail upstream of LDO regulators. Use Value: Limits transient voltage to ≤45.7V, preventing latch-up or permanent damage to 3.3V/5V logic ICs powered from same rail. |
Use Scenario: Shields 24V digital input optocoupler front-end from field-wiring induced surges and relay coil flyback. IC Role / Device Role: First-line transient absorber before series current-limiting resistor and input protection Zener. Use Value: Absorbs >99% of 10/1000μs surge energy, reducing stress on downstream TVS and enabling smaller secondary clamps. |
| AC/DC Adapter Input Stage | LED Driver Power Supply Protection |
Use Scenario: Guards bridge rectifier output and bulk capacitor from line surges and switching transients in universal-input adapters. IC Role / Device Role: Parallel-connected clamp across DC bus to limit voltage overshoot during no-load or fast-load-step conditions. Use Value: Maintains Vbus ≤45.7V during 400W surges, protecting PWM controller ICs rated for 48V absolute maximum. |
Use Scenario: Safeguards constant-current LED driver ICs from inductive kickback when driving high-power COB arrays. IC Role / Device Role: Bidirectional-capable variant not used; unidirectional P4KE33A placed cathode-to-rail to clamp positive transients only. Use Value: Prevents driver IC reset or internal FET avalanche failure by clamping transients within 1.0ps of onset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A (Bourns) | DO-214AA package; 600W rating; 49.9V clamping at 12.3A; higher thermal mass but larger footprint. | Better suited for board space-constrained designs needing higher surge margin; requires layout revision due to SMD footprint. | Select SMBJ33A when surge duty cycle exceeds single-event and PCB real estate allows SMD placement. |
| 1.5KE33A (ON Semiconductor) | Same DO-41 package; identical 33V nominal rating; 45.7V clamping at 9.0A; ±5% VBR tolerance vs. P4KE33A's ±5.2%. | Drop-in replacement with identical mounting and electrical behavior; minor parametric variance in leakage (<0.5μA vs. <1μA). | Choose 1.5KE33A for second-source assurance where Taiwan Semiconductor supply continuity is constrained. |
Compared with SMBJ33A and 1.5KE33A, the P4KE33A offers optimal balance of legacy through-hole compatibility, AEC-Q101 qualification path, and precise 33V clamping for 24V system protection - making it preferred for cost-sensitive, high-volume industrial and automotive Tier-2 designs.
Availability
P4KE33A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and AC/DC power supply input protection requiring stable component supply across multi-year production cycles.
Supply support for P4KE33A 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 reliability requirements.
FAQ
What is the maximum clamping voltage of the P4KE33A under standard surge conditions?
The P4KE33A exhibits a maximum clamping voltage (VC) of 45.7 V when subjected to its rated 9.0 A peak pulse current (IPPM) under the 10/1000μs waveform per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and defines the highest voltage seen by downstream circuitry during a surge event. The P4KE33A maintains this clamping performance consistently due to its tightly controlled avalanche characteristics and low dynamic impedance.
Is the P4KE33A suitable for bidirectional transient protection?
No, the P4KE33A is a unidirectional TVS diode intended for DC line protection where polarity is fixed - its cathode must be connected to the positive rail being protected. For bidirectional applications such as AC lines or data buses, the P4KE33CA variant (with "CA" suffix) is specified, offering symmetrical breakdown in both directions. Using P4KE33A in reverse-biased configurations risks premature failure or inadequate clamping.
How does the P4KE33A compare to the P4KE33 in terms of voltage tolerance?
The P4KE33A has a tighter breakdown voltage tolerance: 31.4–34.7 V (±5.2%) versus the P4KE33's 29.7–36.3 V (±10%). This narrower VBR range ensures more consistent clamping onset across production lots, improving design margin predictability - especially critical in systems where protected ICs have narrow absolute maximum voltage ratings. Both share identical package, power rating, and thermal specifications.
What is the reverse leakage current specification for the P4KE33A at its working voltage?
The P4KE33A specifies a maximum reverse leakage current (IR) of less than 1 μA when biased at its working stand-off voltage (VWM) of 28.2 V. This ultra-low leakage is verified at TA = 25°C and ensures minimal power loss in always-on circuits such as battery-backed sensors or low-quiescent current power supplies. The P4KE33A maintains sub-μA leakage even at elevated temperatures up to 85°C.
Can the P4KE33A be used in automotive applications requiring AEC-Q101 qualification?
Yes - while the base P4KE33A part number is not automatically AEC-Q101 qualified, Taiwan Semiconductor offers the P4KE33AH variant (with "H" suffix) that undergoes full AEC-Q101 stress testing including temperature cycling, high-temperature operating life, and ESD. The P4KE33A itself shares identical die and construction; qualification status depends strictly on the ordering code suffix, and Aetrix Electronics stocks both commercial and AEC-Q101 versions of the P4KE33A family.
P4KE33A 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 9A
- 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)
P4KE33A FAQ
1.How can I place an order for P4KE33A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE33A 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 P4KE33A reliable?
The price and inventory of P4KE33A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE33A is usually 5 days.
3.What payment methods are accepted for P4KE33A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE33A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE33A?
P4KE33A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE33A 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 P4KE33A?
For technical support, including P4KE33A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE33A requirements.
6.How does Aetrix verify that P4KE33A is sourced from the original manufacturer or authorized distributors?
All P4KE33A 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 P4KE33A meets industry standards.
7.What is the process for return or replacement of P4KE33A?
All P4KE33A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE33A, 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 P4KE33A part is unused and in its original packaging.
Return procedure for P4KE33A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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