UDZ LV & KDZ LV Zener Diodes ROHM Semiconductor UDZ LV and KDZ LV Zener Diodes are highly reliable and are ideal for voltage regulation applications. The UDZ LV series offers a range of voltages from 51V to 150V and is offered in a 0.2W rated compact form factor. The KDZ LV features a rated power of 1.0W and is AEC-Q101 qualified. ROHM UDZ LV and KDZ LV Zener diodes offer superior surge resistance and support automotive and industrial standards.