A new series of unidirectional TVS diodes from Lilttelfuse is now available from TTI, a leading specialist distributor of passive, connector, electromechanical and discrete components. The SD05 Series 450W of discrete unidirectional TVS diodes is designed to replace multilayer varistors (MLVs) in electronic equipment for low speed and DC applications and protects sensitive equipment from damage due to ESD and other transient events.
Littelfuse SD05 Series TVS diodes are able to cope with repetitive ESD events at ±30kV (contact discharge, IEC 61000-4-2) without performance degradation and dissipate 30A of 8/20µs induced surge current (IEC61000-4-5) with very low clamping voltages. Such robust surge and enhanced ESD protection guards against the effects of events such as lightning strikes, helping extend equipment life and system up time.
Low dynamic resistance of 0.5O (SD05) and 0.6O (SD05C) protects sensitive electronics by reducing clamping voltage by up to 50% compared to competitive technologies. Leakage current is a maximum of 1µA, a decrease of up to 97% compared to older technologies, which helps extend battery life.
In SOD-323 packages, the Littelfuse SD05 Series fits the same PCB footprint as existing 0805 MLVs without requiring a PCB or solder pad change, so can be used without any product design adjustments being necessary. Suitable applications for Littelfuse SD05 Series TVS diodes include medical equipment, computer equipment, buttons and switches, instrumentation and test equipment and POS terminals.