PTC Resettable Fuses

CRDs (current regulating diodes) are diodes that maintain a constant current flow despite fluctuations in the voltage, over a wide range of voltage, from less than 1V to 100V.                     

Creating a constant current circuit generally involves multiple components. At ATC Semitec, we supply CRDs by Semitec, which provide the same function but as a single component.

This provides a concise, cost effective solution where space is limited.

Have a question or need a sample ? Call one of our engineers today on 01606 871680

Circuit protectors offer circuit protection in devices in a manner that is far superior to using fuses.

This makes them ideal for applications containing:

Relay circuits

Motors

Heaters

Transformers

Solenoids

Semiconductors

Our CRD‘s from Semitec have a wide range of operating voltages that they can steady current over, and their small size makes them a neat solution in tight spaces.

PTC or Polymer PTC (PPTC) fuses carry current up to a threshold temperature. At this point, the crystalline polymer structure will change to an amorphous state, leading to a massive increase in resistance, preventing charge from being carried across the device.

The device will then remain in this high resistance state until the applied voltage is removed and they have cooled down, allowing the polymer structure inside to return to its original crystalline form. Hence, they are considered re-settable.

At ATC Semitec, we have a range of different PTC resettable fuses for use over many currents and operating temperatures.

To have a look at our current range of devices, click here.

Have a question or need a sample ? Call one of our engineers today on 01606 871680

There are many different types of circuit protection devices due to the multiple different ways that current can be limited in a circuit. At ATC Semitec, we have a range of different circuit protects to suit your appliance.

From our repeat use Inrush Current Limiters from Thinking TKS, designed to protect front-end mains voltage supplies against current spikes at switch-on, to our SEFUSE Thermal Fuses from SCHOTT which offer one-shot ultimate thermal protection from 70°C to 240°C, our range can tailor to your requirements.

For more information, and to see our full range of devices, click here.

Have a question or need a sample ? Call one of our engineers today on 01606 871680

Circuit protection devices protect the circuit from excessive temperatures, currents or short circuit in an electrical conductor. They are essentially ‘weak links’ within the circuit that are designed to fail when a fault in the system is encountered. By breaking at low currents, they limit the amount of energy that is released during electrical failure, leading to safer devices.

From PTC resettable fuses, to CRDs, to MOV’s, we have an array of different devices to that can be implemented.

To see our full range of Circuit Protection Devices, click here.

Have a question or need a sample ? Call one of our engineers today on 01606 871680