Zetex Unveils ZX5T851Z NPN/ZX5T951Z PNP Transistors
Zetex Semiconductors (UK), a subsidiary of Zetex plc (Chadderton, Oldham) unveiled its ZX5T851Z NPN and ZX5T951Z PNP bipolar transistors that meet the performance requirements of dc motor control. Provided in the SOT89 package, the devices are a cost-effective alternative to larger packaged parts.
With a collector-emitter voltage of 60 V, the ZX5T851Z NPN and ZX5T951Z PNP devices withstand the voltage demands of medium-power motor drive circuits. The high current gain hold-up characteristics accommodate stall currents and the bipolars’ low saturation voltages ensure on-state losses are kept to a minimum.
The equivalent on-resistance of the NPN and PNP transistors is respectively 30 mΩ at 6 A and 32 mΩ at 5 A. The NPN can handle a continuous current of 5 A and a peak current up to 20 A. The equivalent figures for the PNP are 4.3 A and 15 A. The high gain characteristics of the two transistors are specified up to 10 A. The transistors’ 4.4 mm x 4.0 mm PCB footprint and power dissipation capability of 2.1 W means these SOT89-packaged bipolars offer a viable alternative to traditional SOT223 and DPAK packaged parts and obey the trend towards cost and space reduction in dc motor drive circuitry.
The ZX5T851Z and ZX5T951Z are just two devices from a series of eight new SOT89-packaged transistors covering a VCEO range from 25 V to 140 V, and meeting the requirements of a range of high-current circuits, including dc motor control, emergency lighting and automotive load driving. The price of the ZX5T851Z and ZX5T951Z is $0.24 in 10,000-piece quantities.
