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Taiwan Semiconductor Corporation P4KE33C
- Part No.:
- P4KE33C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE33C.pdf
- Description:
- 400W, 33V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,193
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Product details
Overview
P4KE33C from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy 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 range - deployed in automotive lighting control modules and industrial PLC I/O protection circuits.
For engineers reviewing the P4KE33C datasheet, P4KE33C pinout, P4KE33C application, or P4KE33C equivalent, this page delivers verified electrical parameters, DO-204AL package details, bidirectional clamping behavior, AEC-Q101 qualification status, and real-world ESD/inductive switching protection use cases - all confirmed from Taiwan Semiconductor's official P4KE Series specification N2104.
Technical Context
The P4KE33C is a silicon avalanche diode configured as a bidirectional TVS, with symmetrical breakdown characteristics in both polarities. Its VBR min/max is 29.7V–36.3V at 1mA test current, and it achieves clamping within 5.0ns response time - enabling suppression of fast transients such as EFT (IEC 61000-4-4) and ISO 7637-2 load dump spikes.
It complies with ANSI/IEEE C62.35 for peak pulse ratings and meets UL 94V-0 flammability requirements in its DO-204AL molded package. With <1μA reverse leakage at 26.8V working voltage and 0.098%/°C VBR temperature coefficient, it maintains stable clamping performance under thermal stress without significant drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26.8 V - Maximum continuous DC or RMS voltage the device blocks without conduction; defines safe operating margin below clamping threshold. |
| VBR @ IT=1mA | 29.7–36.3 V - Breakdown voltage range where avalanche conduction begins; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 47.7 V at 8.8 A - Clamped voltage during 10/1000μs surge; limits downstream IC voltage stress to safe levels. |
| PPK | 400 W - Peak pulse power handling per single 10/1000μs waveform; supports robust immunity against lightning-induced surges. |
| TJ max | +175°C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| Response time | 5.0 ns - Time from 0V to VBR under bidirectional surge; fast enough to protect CMOS inputs and microcontroller GPIOs. |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with tin-plated leads; compatible with standard wave soldering and manual assembly. |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking for unidirectional variants; P4KE33C is bidirectional and has no polarity marking - terminals are electrically symmetrical 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 orientation required during PCB placement. |
| Lead 1 / Lead 2 | Current path for surge conduction | Carries full IPPM (8.8A) during clamping; requires ≥0.375" (9.5mm) lead length for rated 1W steady-state dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage overshoot during surge events - critical for protecting 3.3V/5V logic interfaces without additional series impedance. |
| UL Recognized (E326243) | Meets UL 94V-0 flammability and safety standards - required for end-equipment certification in industrial and medical auxiliary systems. |
| Halogen-free & RoHS compliant | Complies with IEC 61249-2-21 and EU RoHS Directive - supports environmentally regulated supply chains and WEEE compliance. |
| 0.098%/°C VBR tempco | Ensures stable breakdown voltage across wide temperature ranges - avoids false triggering or insufficient clamping in cold-start or hot-soak conditions. |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protects MOSFET gate drivers and current-sense amplifiers from load-dump transients (>100V, 100ms) and ISO 7637-2 pulse 5a/b in 12V vehicle lighting systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and ground near driver IC input pins to clamp surges before they reach sensitive analog front-ends. Use Value: Limits voltage to ≤47.7V during 8.8A surge, preventing latch-up or gate oxide rupture in 40V-rated FETs and op-amps. |
Use Scenario: Shields 24V digital input optocouplers and microcontroller GPIOs from inductive kickback when switching solenoids or relays in factory automation cabinets. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to absorb 10/1000μs transients before propagation into isolation barrier and MCU interface circuitry. Use Value: Achieves sub-5ns response to suppress >1kV EFT bursts (IEC 61000-4-4), maintaining signal integrity and eliminating spurious interrupts. |
| Smart Building Occupancy Sensor ESD Hardening | Renewable Energy Inverter DC Link Surge Suppression |
|
Use Scenario: Guards capacitive touch and PIR sensor signal paths against human-body-model (HBM) ESD events up to ±15kV in wall-mounted occupancy controllers. IC Role / Device Role / Timing Role: Placed in series with sensor output line to shunt ESD current away from low-voltage analog signal conditioning ICs (e.g., op-amps, ADCs). Use Value: Delivers <1μA leakage at 26.8V, preserving high-impedance sensor node accuracy while clamping 30A HBM pulses to <50V. |
Use Scenario: Suppresses switching transients generated by IGBTs in solar PV string inverters during MPPT algorithm-driven duty-cycle changes. IC Role / Device Role / Timing Role: Connected across DC bus (e.g., 300–600V nominal) to clamp voltage spikes caused by di/dt-induced L·di/dt ringing on long cable runs. Use Value: Handles 400W single-pulse energy without degradation, extending electrolytic capacitor life and preventing overvoltage shutdown in DC-link monitoring circuits. |
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 at 7.5A - higher clamping voltage than P4KE33C. | Surface-mount only; requires reflow-compatible layout; less suited for through-hole legacy designs or high-reliability mechanical retention. | Select when board space is constrained and SMT assembly is standardized; verify clamping margin for 3.3V/5V logic interfaces. |
| ON Semiconductor 1.5KE33CA | Higher 1500W rating; DO-201AD package; VBR = 29.7–36.3V (identical); VC = 47.7V at 31.3A - same clamping but greater surge capacity. | Larger footprint and higher thermal mass; better for repeated surge exposure but over-specified for single-event protection in cost-sensitive consumer gear. | Choose for mission-critical industrial controls requiring multi-pulse endurance; avoid where size, weight, or BOM cost are primary constraints. |
Compared with SMAJ33CA and 1.5KE33CA, the P4KE33C offers optimal balance of axial through-hole mechanical robustness, AEC-Q101 qualification, and precise 47.7V clamping - making it preferred for automotive lighting and industrial field I/O where reliability, serviceability, and thermal derating consistency matter most.
Availability
P4KE33C is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, smart building sensor hardening, and renewable energy inverter DC-link surge suppression requiring stable component supply across extended product lifecycles.
Supply support for P4KE33C 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 thyristors - headquartered in Hsinchu, Taiwan.
The P4KE Series was developed for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - emphasizing AEC-Q101 compliance, tight parameter distribution, and UL/IEC-certified surge performance.
FAQ
What is the key difference between P4KE33C and P4KE33A?
The P4KE33C is a bidirectional TVS diode, while the P4KE33A is unidirectional. The "C" suffix denotes symmetrical breakdown in both polarities - essential for AC-coupled or floating signal line protection. The P4KE33C maintains identical VBR (29.7–36.3V), VC (47.7V), and PPK (400W) specs as P4KE33A but enables polarity-agnostic placement. This makes P4KE33C ideal for differential bus protection like RS-485 or CAN where voltage reversals occur.
Does P4KE33C meet AEC-Q101 requirements?
Yes - the P4KE33C is explicitly qualified to AEC-Q101 when ordered with the "H" suffix (e.g., P4KE33CH). Per Taiwan Semiconductor's ordering guide, "H" indicates AEC-Q101 qualification, covering stress tests including HTGB, H3TRB, and temperature cycling. Standard P4KE33C is not automatically qualified; designers must specify the H variant for automotive applications requiring formal qualification evidence.
What is the maximum allowable mounting temperature for P4KE33C during reflow or wave soldering?
The P4KE33C uses a DO-204AL (DO-41) package with pure tin-plated leads rated per J-STD-002 for solderability. Its molding compound meets UL 94V-0, and maximum lead temperature during wave soldering is 260°C for 10 seconds. For reflow, though not recommended due to axial form factor, peak temperature must not exceed 260°C for ≤10s to avoid internal delamination or bond wire damage - always follow Taiwan Semiconductor's N2104 package handling guidelines.
How does P4KE33C perform under repeated surge stress?
The P4KE33C is rated for non-repetitive 10/1000μs surges per ANSI/IEEE C62.35. Its 400W PPK rating applies to single pulses; repetitive surges require derating per Fig.2 in the datasheet - e.g., at 100°C ambient, maximum steady-state power drops to ~0.5W. For applications expecting frequent transients (e.g., motor drives), thermal design must ensure TJ stays ≤175°C, and cumulative energy must remain below 400W·ms per event to prevent parametric shift or failure.
Can P4KE33C be used in parallel for higher surge current handling?
No - P4KE33C should not be paralleled without external balancing resistors. Due to manufacturing tolerances in VBR (±10%), one device will conduct first and absorb disproportionate energy, risking thermal runaway. If higher IPPM is needed, select a higher-rated part like 1.5KE33CA (31.3A) or use a TVS array with matched characteristics. Parallel use of discrete P4KE33C units violates Taiwan Semiconductor's application guidance and voids reliability guarantees.
P4KE33C 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):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
P4KE33C FAQ
1.How can I place an order for P4KE33C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE33C 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 P4KE33C reliable?
The price and inventory of P4KE33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE33C is usually 5 days.
3.What payment methods are accepted for P4KE33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE33C?
P4KE33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE33C 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 P4KE33C?
For technical support, including P4KE33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE33C requirements.
6.How does Aetrix verify that P4KE33C is sourced from the original manufacturer or authorized distributors?
All P4KE33C 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 P4KE33C meets industry standards.
7.What is the process for return or replacement of P4KE33C?
All P4KE33C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE33C, 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 P4KE33C part is unused and in its original packaging.
Return procedure for P4KE33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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