150mm OD Silicon Carbide Varistors Disks

 

OD ID Thickness Continuous Operating
Voltage		 Max Power
Dissipation		 Max. Energy
Absorption		 Max. Pulse Current
(80/20us)		 Typical Production
Level		 Varistor
V/A		 Exponent
mm mm mm Vdc Vrms W J A Peak A Peak Avg A Vdc/Vac mAdc/mAac 1/β
150 21 7.6 250 227 45.2 48130 350 1000 50 405 to 495 1000 5
150 21 10 838 348 59.5 62940 160 1110 50 585 to 715 1000 5
150 21 12.7 400 440 75.6 79600 50 1200 50 810 to 990 1000 5
150 21 12.7 435 478 75.6 79600 100 1350 50 900 to 1100 1000 5
150 21 19 480 528 113.2 114780 150 1500 50 990 to 1210 1000 5
150 21 7.6 1 1 45.2 49680 15000 280 500 50 to 60 25000 3
150 21 7.6 21 19 45.2 49680 30000 700 500 150 to 200 25000 4
150 21 7.6 250 227 45.2 49680 350 1150 50 405 to 495 1000 5
150 21 7.6 275 250 45.2 49680 200 1500 50 250 15 to 45 5
150 21 10 18 17 59.5 65880 30000 440 500 50 to 70 25000 3
150 21 10 383 348 59.5 64960 160 1800 50 585 to 715 1000 5
150 21 12.7 27 24 75.6 82160 30000 950 500 200 to 250 25000 3
150 21 12.7 200 181 75.6 82160 500 1700 50 440 to 660 500 4
150 21 12.7 463 421 75.6 82160 100 2500 50 810 to 990 1000 5
150 21 12.7 602 547 75.6 82160 100 2750 50 900 to 1100 1000 5
150 21 15 2 2 89.3 98180 30000 500 500 80 to 120 25000 3
150 21 15 5 5 89.3 96810 10000 850 500 200 to 250 25000 3
150 21 15 9 8 89.3 96810 10000 1500 500 320 to 440 25000 3
150 21 15 11 10 89.3 96810 10000 1700 500 380 to 570 25000 3
150 21 15 13 12 89.3 96810 10000 2150 500 440 to 660 25000 3
150 21 19 331 301 113.2 122290 1000 2600 50 440 to 660 500 4
150 21 19 23 21 90.5 122290 10000 1800 500 855 to 1045 25000 3
150 21 19 662 602 113.2 122290 150 3400 50 990 to 1210 1000 4

Silicon Carbide Varistor Disc description and applications:

A silicon carbide varistor, often referred to as a SiC varistor, is a specialized electrical component designed to protect circuits and equipment from voltage surges and transients. It exhibits a highly nonlinear voltage-current characteristic, meaning its resistance decreases as voltage across it increases. This unique behavior allows it to absorb excessive voltage spikes and limit the potential damage they can cause to sensitive electronics, such as computers, power supplies, and more. Silicon carbide varistors are invaluable in surge protector circuits and play a critical role in safeguarding against voltage anomalies in various electrical systems. They are essentially solid-state variable Resistors used to control the flow of current within a circuit by altering resistance. They provide a variable electrical resistance that protects electrical systems.

As an excitation field limiter, a Silicon Carbide Varistor is a critical component in electrical systems, particularly in generators and motors. Its primary function is to control and stabilize the magnetic field generated within these machines. Limiting the excitation field ensures that the machine operates within safe and optimal parameters, preventing overheating and excess energy consumption. Excitation field limiters are crucial for maintaining the efficiency and longevity of electric motors and generators, making them an integral part of many industrial and power generation systems.

When incorporated into Electric Motor Brake Circuits Silicon Carbide Varistors stop or slow down the rotation of an electric motor rapidly. These brakes are essential for ensuring the safe and precise control of machinery and equipment. They find applications in various industries, including manufacturing, automation, and transportation, where the prompt cessation of motion is critical for safety or operational requirements. Electric motor brakes are engineered to engage quickly when needed, preventing uncontrolled movement and enhancing the overall efficiency and safety of electric motor-driven systems.

The self-healing characteristics of the Silicon Carbide Varistor in the Surge Protector Circuit have a clear advantage over MOV varistor which after repeated overvoltage, switching surges change its microstructure and will fail. Since a surge protector circuit is a vital component within electrical and electronic systems, designed to shield devices from voltage surges and spikes unpredictable failures are not ideal. These sudden increases in voltage, often caused by lightning strikes, power grid fluctuations, or switching events, can damage or destroy sensitive equipment. For industrial systems surge protector circuits employing SiC varistors, to divert excessive voltage away from connected devices, safeguarding them against potential harm is critical. They are commonly used in data centers and industrial facilities to ensure the reliability and longevity of electronic equipment.

In generator de-excitation circuits Silicon Carbide Varistors will “De-Energized” the field in the generator. The term “de-energized” refers to the state of an electrical circuit or system where it has no electrical power or energy running through it. This state is often crucial for the safe maintenance, repair, or modification of electrical equipment, as working on live or energized systems can pose serious risks to personnel and equipment. Ensuring that a circuit is de-energized, often through proper isolation and lockout procedures, is a fundamental safety measure in electrical work to prevent accidents and injuries.

Varistors, short for variable resistors, are electronic components with resistance levels that change with variations in voltage. They are essential in surge protection circuits to absorb excess voltage and prevent it from damaging connected devices. Varistors exhibit nonlinear voltage-current characteristics, making them ideal for clamping transient voltage spikes and surges in electrical systems.