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Taiwan Semiconductor Corporation P4KE8.2CA
- Part No.:
- P4KE8.2CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE8.2CA.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,317
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Product details
Overview
P4KE8.2CA from Taiwan Semiconductor is a bidirectional 400W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 8.2V, clamps transients to ≤12.5V at 33A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive lighting control modules and industrial sensor interfaces.
For engineers reviewing the P4KE8.2CA datasheet, P4KE8.2CA pinout, P4KE8.2CA application, or P4KE8.2CA equivalent, key selection criteria include its bidirectional DO-41 package, 6.63V working stand-off voltage, <1μA reverse leakage at VWM, and compliance with AEC-Q101 for automotive-grade reliability.
Technical Context
The P4KE8.2CA is a silicon avalanche diode configured as a bidirectional TVS, enabling symmetrical clamping in both polarities without external polarity management. Its 10/1000μs surge rating of 400W and sub-5ns response time ensure robust suppression of EFT and inductive switching transients.
It exhibits a temperature coefficient of +0.065%/°C for VBR and maintains stable clamping performance up to TJ = 175°C. The device uses pure tin-plated leads compliant with J-STD-002 and meets UL 94V-0 flammability requirements in its DO-204AL molded case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.63 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR min/max | 7.38 V / 9.02 V at 10 mA - Confirmed breakdown threshold range defining turn-on consistency |
| IPPM | 33.0 A - Peak pulse current it safely shunts during 10/1000μs transients |
| VC@IPPM | 12.5 V - Clamped voltage seen by protected circuit under full 400W surge |
| ID@VWM | <1 μA - Ultra-low leakage ensures minimal standby power loss in battery-powered systems |
| TJ max | +175 °C - Enables operation in under-hood automotive or high-temperature industrial environments |
| Package | DO-204AL (DO-41) - Industry-standard axial leaded package with 0.300g mass and RoHS/halogen-free compliance |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking omitted for bidirectional configuration; body length 4.3 mm ±0.3 mm, lead diameter 0.51 mm ±0.05 mm, overall length 24.0 mm ±2.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity dependence - either lead serves as input/output terminal for transient energy diversion |
| Lead 1 / Lead 2 | Current path terminals | Both leads electrically identical; solderable per J-STD-002 with pure tin plating and whisker resistance per JESD201 Class 2 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant | Validated for automotive applications including engine control units and lighting drivers requiring stress-tested reliability |
| 400W peak pulse power | Handles repetitive 10/1000μs surges up to 400W without degradation - sufficient for ISO 7637-2 Pulse 1/2a/3a immunity testing |
| Fast response time | <5.0 ns rise-to-clamp delay ensures protection before sensitive ICs experience overstress |
| Low clamping ratio | VC/VBR ≈ 1.35 - tight voltage margin between standoff and clamping improves system-level surge margin |
| UL 94V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed industrial and transportation equipment |
Applications
| Automotive LED Headlamp Drivers | Industrial PLC Digital I/O Modules |
|---|---|
Use Scenario: Protecting constant-current LED driver ICs from load-dump and jump-start transients in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input pins to clamp positive/negative spikes before they reach the driver's internal FETs and control logic. Use Value: Prevents latch-up or gate oxide damage in LED drivers by limiting transient voltage to 12.5V while sustaining 33A pulses - meeting OEM requirements for SAE J1113-11 immunity. | Use Scenario: Shielding 24V digital input circuits in programmable logic controllers from inductive kickback generated by solenoid valves and relay coils. IC Role / Device Role / Timing Role: Installed at field-side connector interface to absorb stored magnetic energy before it propagates into isolation barriers and microcontroller GPIOs. Use Value: Enables reliable operation under IEC 61000-4-4 EFT bursts (4 kV) by clamping within 5 ns and maintaining <1μA leakage at 24V-rated inputs. |
| Smart Building Occupancy Sensor Interfaces | Medical Infusion Pump Power Inputs |
Use Scenario: Safeguarding low-power PIR and ultrasonic motion sensors connected to long wiring runs exposed to nearby lightning-induced surges. IC Role / Device Role / Timing Role: Mounted directly at PCB entry point to divert induced common-mode transients before reaching analog front-end amplifiers and ADC reference paths. Use Value: Maintains signal integrity by limiting clamping voltage to 12.5V and offering 0.065%/°C VBR stability - critical for battery-operated edge devices with wide ambient temperature swings. | Use Scenario: Providing secondary overvoltage protection on 24V DC input rails of infusion pumps where primary protection resides upstream. IC Role / Device Role / Timing Role: Acts as last-line defense against sustained overvoltage events caused by power supply faults or miswiring in clinical environments. Use Value: Delivers fail-safe clamping at 12.5V with UL recognition (E-326243) and halogen-free construction - supporting medical device regulatory compliance and flame-safety requirements. |
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 SMAJ8.0CA | Same DO-214AC package; 8.0V nominal, 12.5V clamping at 32.8A; slightly lower PPK (400W same), higher capacitance (~200pF) | Higher junction capacitance may affect high-speed signal line use; better suited for power rail vs. data line protection | Select when footprint compatibility with SMA package is required and board layout allows larger body size |
| ON Semiconductor 1.5KE8.2CA | Higher PPK (1500W); DO-201AD package; 12.5V clamping at 120A; slower thermal response due to larger die | Overqualified for 400W needs; requires larger PCB pad area and higher surge margin than typical automotive/lighting designs | Choose only when legacy 1.5KE footprint is fixed and system-level surge threat exceeds 400W |
Compared with SMAJ8.0CA and 1.5KE8.2CA, the P4KE8.2CA offers optimal balance of compact DO-41 form factor, precise 8.2V standoff, and AEC-Q101 qualification - making it preferred for space-constrained, automotive-compliant DC protection where exact voltage matching and thermal cycling endurance matter.
Availability
P4KE8.2CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and medical device power input safeguarding requiring stable component supply across multi-year production cycles.
Supply support for P4KE8.2CA 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 capability.
The P4KE series targets cost-sensitive, high-reliability overvoltage protection in automotive, industrial, and consumer applications - emphasizing surge robustness, temperature stability, and regulatory compliance in axial-leaded packaging.
FAQ
What is the maximum clamping voltage of the P4KE8.2CA under a 10/1000μs surge?
The P4KE8.2CA clamps to a maximum of 12.5 V when subjected to its rated 33.0 A peak pulse current under the standard 10/1000μs waveform. This value is guaranteed per the manufacturer's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during transient events. The P4KE8.2CA achieves this with minimal overshoot due to its sub-5 ns response time and low dynamic impedance.
Is the P4KE8.2CA unidirectional or bidirectional, and how is polarity marked?
The P4KE8.2CA is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without requiring orientation during placement. Unlike unidirectional variants (e.g., P4KE8.2), the P4KE8.2CA has no cathode band marking - its DO-41 package is unpolarized, and either lead functions identically. This simplifies PCB layout and eliminates risk of reverse installation in the P4KE8.2CA design.
Does the P4KE8.2CA meet AEC-Q101 qualification, and what does that cover?
Yes, the P4KE8.2CA is offered in an AEC-Q101 qualified version (denoted by "H" suffix in ordering code, e.g., P4KE8.2CAH). This qualification covers stress tests including high-temperature operating life, temperature cycling, mechanical shock, and electrostatic discharge - validating suitability for automotive under-hood and cabin applications. The P4KE8.2CA's base qualification supports deployment in lighting modules, body control units, and infotainment power supplies.
What is the reverse leakage current of the P4KE8.2CA at its working stand-off voltage?
At its specified working stand-off voltage of 6.63 V, the P4KE8.2CA exhibits a maximum reverse leakage current (ID) of 200 μA - well below the 1 μA typical value cited in general series features. This low leakage ensures minimal power drain in always-on systems such as automotive occupancy sensors or battery-backed medical devices using the P4KE8.2CA for primary surge defense.
Can the P4KE8.2CA be used in place of the P4KE8.2 or P4KE8.2A variants?
No - the P4KE8.2CA is not a direct replacement for unidirectional P4KE8.2 or P4KE8.2A parts. While all share the same breakdown voltage range (7.38–9.02 V), the P4KE8.2CA's bidirectional structure means it lacks polarity sensitivity and cannot replace a unidirectional TVS in circuits relying on DC blocking or asymmetric clamping. Substituting the P4KE8.2CA for P4KE8.2 would require verifying system-level polarity tolerance and revalidating clamping behavior in both directions.
P4KE8.2CA 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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
P4KE8.2CA FAQ
1.How can I place an order for P4KE8.2CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE8.2CA 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 P4KE8.2CA reliable?
The price and inventory of P4KE8.2CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE8.2CA is usually 5 days.
3.What payment methods are accepted for P4KE8.2CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE8.2CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE8.2CA?
P4KE8.2CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE8.2CA 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 P4KE8.2CA?
For technical support, including P4KE8.2CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE8.2CA requirements.
6.How does Aetrix verify that P4KE8.2CA is sourced from the original manufacturer or authorized distributors?
All P4KE8.2CA 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 P4KE8.2CA meets industry standards.
7.What is the process for return or replacement of P4KE8.2CA?
All P4KE8.2CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE8.2CA, 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 P4KE8.2CA part is unused and in its original packaging.
Return procedure for P4KE8.2CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE8.2CA Tags
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