Slim Resistive Heaters Cover All The Bases

TT Electronics introduces the WSHR family of ultra-low-profile resistive heaters to provide compact, dynamic heating and temperature control for applications such as enclosure heating, chemical or food processing, sealing, printing, and medical humidifiers.


Measuring less than 2-mm thick, and weighing as little as 6.5g, the thick-film on steel heaters promise to save the space consumed by conventional alternatives comprising wirewound or Positive Temperature Coefficient (PTC) components. The family offers six sizes from 32 mm x 28 mm up to 152 mm x 102 mm, with power ratings from 144W at 120V to 1.2 kW at 240V. Their planar design ensures uniform temperature distribution across the surface area, enabling a single unit to replace multiple conventional elements. Operating temperatures range up to 400°C.

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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 maximize 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.


In addition to the standard sizes, the company can also provide custom dimensions and shapes to special order. Additional options include non-standard thermal profiles, custom voltage or power ratings, or integrated temperature regulation and measurement. WSHR heaters are RoHS compliant, non-flammable, and feature 2.5kV safety isolation. For more information, peruse the WSHR datasheet.

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