The WSHR thick-film on steel heaters are less than 2mm thick and weigh as little as 6.5 grams, saving the space consumed by conventional alternatives comprising bulky wirewound or PTC (Positive Temperature Coefficient) components.
The family comprises six sizes from 32mm x 28mm up to 152mm x 102mm, with power ratings from 144W at 120V to 1.2kW at 240V. The planar design ensures uniform temperature distribution across the surface area, enabling a single unit to replace multiple conventional elements. TT Electronics also offers custom dimensions and shapes to special order, including non-standard thermal profiles, custom voltage or power ratings, or integrated temperature regulation and measurement.
With a wide operating temperature range, reaching up to 400°C, the heaters provide flexibility with precision. In addition, their low thermal mass ensures a fast time constant to enable fast-acting, accurate dynamic temperature control with minimal energy wastage.
A central mounting hole permits easy fixing to a heatsink surface, using a single M2 to M5 bolt depending on heater size. Guidance on tightening torque is provided, to help maximise the contact area for optimum heat transfer. Three choices of electrical terminals give designers the option to connect directly to exposed solder pads or via pre-attached flying leads or push-on connectors.
The WSHR heaters are RoHS compliant, non-flammable, and feature 2.5kV safety isolation.