P4KE43A is a high-reliability 400W transient voltage suppressor (TVS) diode in a robust DO-41 axial lead package, designed to protect sensitive electronic circuits from damaging voltage transients such as ESD (electrostatic discharge), lightning surges, inductive switching spikes, and power line overvoltage events. It works by rapidly clamping excessive transient voltages and safely diverting surge energy away from critical components, ensuring stable operation and long-term circuit reliability.
Built with a glass-passivated junction structure, the P4KE43A provides excellent electrical stability, low leakage current, and consistent breakdown performance even under repetitive surge stress conditions. Its fast response time enables near-instant protection, effectively safeguarding ICs, microcontrollers, communication interfaces, and power management circuits from transient voltage damage.
With a 400W peak pulse power rating (10/1000 μs waveform), this device delivers strong surge absorption capability, making it suitable for industrial, automotive, and harsh environment applications where reliable overvoltage protection is essential. The uni-directional configuration ensures efficient DC line protection and enhances overall system safety and durability.
The DO-41 package offers strong mechanical durability, easy PCB mounting, and reliable thermal performance, making it ideal for both compact and rugged electronic designs.
Key Features
- 400W peak pulse power dissipation (10/1000 μs)
- Fast response time for transient voltage suppression
- Glass-passivated junction for high reliability
- Low leakage current for efficient operation
- Uni-directional TVS diode structure
- DO-41 axial lead package
- Strong ESD, surge, and lightning protection capability
Applications
- Power supply protection circuits
- Consumer electronic devices
- Telecom and communication systems
- Industrial control equipment
- Automotive electronics modules
- General-purpose transient voltage suppression applications
