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Taiwan Semiconductor Corporation P4KE33CA
- Part No.:
- P4KE33CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE33CA.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,982
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Product details
Overview
P4KE33CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 33V nominal standoff voltage, 400W peak pulse power rating at 10/1000μs, clamping voltage of 47.7V at 8.8A peak pulse current, and operates across –55°C to +175°C junction temperature - deployed in automotive lighting control modules and industrial I/O interface protection.
For engineers reviewing the P4KE33CA datasheet, P4KE33CA pinout, P4KE33CA application, or P4KE33CA equivalent, key selection criteria include bidirectional clamping capability, DO-41 package compatibility, AEC-Q101 qualification status, low leakage (<1μA @ 26.8V), and fast response time (<5ns).
Technical Context
The P4KE33CA is a silicon avalanche diode operating in reverse breakdown to clamp transient overvoltages. Its bidirectional structure enables symmetrical clamping in both polarities without external polarity management, making it suitable for AC-coupled or floating signal paths.
It delivers 400W surge handling per the 10/1000μs waveform per ANSI/IEEE C62.35, with a maximum clamping voltage of 47.7V at 8.8A IPPM and a breakdown voltage range of 29.7V–36.3V at 1mA test current - ensuring robust protection margin above its 26.8V working stand-off voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 33 V - defines rated DC operating voltage threshold before clamping initiates |
| Working Stand-off Voltage (VWM) | 26.8 V - maximum continuous reverse voltage the device blocks without significant leakage |
| Breakdown Voltage (VBR) | 29.7–36.3 V @ 1 mA - verified avalanche onset range ensuring predictable clamping onset |
| Peak Pulse Power (PPK) | 400 W - energy-handling capacity under standardized 10/1000μs surge waveform |
| Clamping Voltage (VC) | 47.7 V @ 8.8 A - maximum voltage seen by protected circuit during full-rated surge event |
| Leakage Current (ID) | <1 μA @ 26.8 V - negligible standby power loss and minimal loading on source circuits |
| Junction Temperature Range | –55°C to +175°C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
Package: DO-204AL (DO-41) - axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias; one side of bidirectional conduction path | Functions identically to cathode under reverse polarity - no fixed polarity required for bidirectional operation |
| Cathode (banded end) | Current exit terminal in forward bias; other side of bidirectional conduction path | Marking band indicates terminal orientation but does not enforce unidirectional use - symmetric clamping applies to both terminals |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC signals or floating buses without polarity awareness or external diode pairing |
| AEC-Q101 qualified variant available | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| 400W surge rating at 10/1000μs | Withstands IEC 61000-4-5 Level 4 (4kV) surges when properly routed with low-inductance layout |
| Clamping response time <5 ns | Engages before most microcontroller I/O structures can be damaged by fast transients such as EFT or contact discharge |
| RoHS and halogen-free compliance | Meets IEC 61249-2-21 for environmentally constrained applications including EU automotive and industrial equipment |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting MOSFET gate drivers and current-sense amplifiers from load-dump and inductive kickback in 12V/24V LED headlamp systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across driver output and ground to clamp ±100V transients within 5ns. Use Value: Prevents latch-up or gate oxide rupture in downstream ICs while maintaining <1μA leakage at 26.8V system rail. |
Use Scenario: Shielding 24V digital input channels in programmable logic controllers from field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Mounted at connector entry point to shunt >1kV transients before reaching optocoupler or MCU GPIO. Use Value: Ensures immunity to IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without degrading signal integrity due to low capacitance. |
| USB-C Port ESD Protection | Smart Meter Communication Interface Protection |
Use Scenario: Safeguarding USB-C CC and SBU lines against human-body-model (HBM) and IEC 61000-4-2 contact discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with differential pairs to limit voltage excursions to <48V. Use Value: Maintains signal fidelity up to 10Mbps while suppressing ±15kV ESD pulses without adding jitter or reflection. |
Use Scenario: Protecting RS-485 transceivers in smart electricity meters from lightning-induced surges on long outdoor communication lines. IC Role / Device Role / Timing Role: Installed between bus line and ground to clamp common-mode transients exceeding 6kV (IEC 61000-4-5 Level 4). Use Value: Enables >100,000 surge cycles endurance with stable clamping voltage drift <5% over lifetime. |
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 SMAJ33CA | Same DO-214AC (SMA) package; 400W rating; VBR = 36.7–40.6V; VC = 53.3V @ 7.5A | Higher clamping voltage (+5.6V) and lower IPPM (7.5A vs. 8.8A); requires PCB footprint change | Select when SMA surface-mount layout is preferred and higher clamping margin is acceptable |
| ON Semiconductor 1.5KE33CA | Same DO-201AD (DO-27) package; 1500W rating; VBR = 29.7–36.3V; VC = 49.9V @ 30A | Higher power rating but larger footprint and higher parasitic inductance; not AEC-Q101 qualified | Choose for non-automotive high-energy surge zones where board space allows larger leaded package |
Compared with P4KE33CA, SMAJ33CA offers surface-mount compatibility at the cost of higher clamping voltage and reduced surge current handling, while 1.5KE33CA provides greater energy absorption in a larger through-hole package but lacks automotive qualification and introduces layout incompatibility.
Availability
P4KE33CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC inputs, USB-C interface protection, and smart meter communication interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P4KE33CA 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The P4KE series was developed to deliver AEC-Q101-qualified, high-reliability transient suppression for automotive and industrial applications where robustness, tight parameter distribution, and long-term stability under thermal stress are critical.
FAQ
What does the 'CA' suffix indicate in P4KE33CA?
The 'CA' suffix in P4KE33CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional variants (e.g., P4KE33A), P4KE33CA has identical electrical characteristics in either direction and is marked with a single cathode band for mechanical orientation only, not functional polarity.
Is P4KE33CA AEC-Q101 qualified?
P4KE33CA itself is not automatically AEC-Q101 qualified; qualification applies only to variants marked with the 'H' suffix (e.g., P4KE33CAH). The base P4KE33CA meets all electrical and mechanical specifications in the datasheet but requires explicit validation per AEC-Q101 test plan for automotive deployment. Always verify part number suffix and certification documentation before automotive use.
What is the maximum clamping voltage of P4KE33CA under full-rated surge conditions?
The maximum clamping voltage of P4KE33CA is 47.7 V at 8.8 A peak pulse current (IPPM), measured under the standard 10/1000μs double-exponential waveform. This value represents the worst-case voltage imposed on the protected circuit during a 400W transient event and is guaranteed across the full operating temperature range.
Can P4KE33CA replace P4KE33A in an existing design?
No - P4KE33CA cannot directly replace P4KE33A without circuit review. While both share the same VBR and VC ratings, P4KE33A is unidirectional and requires correct anode/cathode orientation, whereas P4KE33CA is bidirectional and functionally agnostic to polarity. Swapping may cause unexpected conduction paths in DC-biased circuits or compromise protection in asymmetric topologies.
What is the thermal resistance junction-to-ambient for P4KE33CA in DO-41 package?
The P4KE33CA in DO-204AL (DO-41) package has a typical junction-to-ambient thermal resistance (RθJA) of 100°C/W when mounted on FR-4 PCB with minimum copper pads. With 5×5 mm copper pads per lead, RθJA improves to approximately 50°C/W - enabling reliable operation up to 175°C junction temperature under steady-state power dissipation of 1W.
P4KE33CA 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):
- 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)
P4KE33CA FAQ
1.How can I place an order for P4KE33CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE33CA 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 P4KE33CA reliable?
The price and inventory of P4KE33CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE33CA is usually 5 days.
3.What payment methods are accepted for P4KE33CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE33CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE33CA?
P4KE33CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE33CA 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 P4KE33CA?
For technical support, including P4KE33CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE33CA requirements.
6.How does Aetrix verify that P4KE33CA is sourced from the original manufacturer or authorized distributors?
All P4KE33CA 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 P4KE33CA meets industry standards.
7.What is the process for return or replacement of P4KE33CA?
All P4KE33CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE33CA, 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 P4KE33CA part is unused and in its original packaging.
Return procedure for P4KE33CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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