The TCLLZ27VTR with Zener diode LL34 RoHS is a 27 Volt, 2.5 Watt Zener diode manufactured by Tak Cheong. It is RoHS compliant and has two terminals. This Zener diode is designed for use as a voltage regulator, to protect from surge and overvoltage conditions. It features a high impedance input and low resistance output, making it suitable for automatic reset applications such as electric assemblies, circuit protection, and more. The device is reliable and durable, operating under extreme temperatures up to 125°C. It is a low cost solution that offers fast switching, stable voltage regulation, and excellent electrical characteristics.