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When space is limited Semitec’s small CRDs can replace multiple components count in space-critical applications, easing assembly, whilst assuring protection, stability, and higher current ratings.

The current S-series CRD offers constant current values from 0.1ma up to 18mA. The latest addition to our range, is the S223T a 22mA CRD for use in high luminance LEDs, once again allowing just 1 single unit to be used for current stabilisation.

Despite their size, the CRDs offer protection, stability and improved performance when driving LED circuits, waveforms generators and biasing amplifiers. They can also be used as an excellent voltage reference in conjunction with a zener diode.

The CRDs can be supplied as a diode (E series) or within a SMD package (S series) or to your own specification.

By using them in series or parallel, both higher voltages and higher current ratings can be achieved. Also this can be dual voltages

ATC Semitec is the UK’s leading distributor of thermal components working with some of the major suppliers in the NTC thermistor and thermostat industry.
With over 20 years’ experience in the thermal controls industry and ISO 9001:2008 accreditation, you can feel confident that you are working with a quality supplier of thermal components.

Our team of engineering professionals work with you to help design in the most suitable temperature sensor or safety component for either your NPD or product updates. If required we create bespoke customer solutions from variable lead lengths, special fittings, connections or unique sensor tips.

ATC Semitec offers you leading edge thermal solutions from some of the major names in the industry; Semitec, PEPI, Asahi, Thinking, Matsuo, NEC Schott Fuzetec and EAW. Each of these manufacturers have built their reputation on providing innovative, quality products backed up by our superior customer service.

ATC Semitec NTC thermistors and thermistor sensors provide high accuracy temperature sensing and control for electronic and programmable thermostats.

PEPI thermal cut-outs and Asahi thermostats offer cost-effective temperature control or over-temperature protection whereas Matsuo’s long-life precision thermostats bridge the gap between electronic temperature controllers and simple mechanical thermostats.

NEC Sefuse thermal fuses, Thinking PTC Thermistors and Semifuse PTC fuses all provide reliable circuit protection.

Constant current is supplied via Semitec CRD current limiting diodes and current surges controlled by SCK inrush current limiters.

Together we are a formidable team. Quality products, comprehensive technical assistance, extensive stock-holding and competitive pricing all adds up to the best solution for your company’s needs.

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