45mm 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 |
| 45 | 15 | 3 | 21 | 19 | 5.3 | 1600 | 100 | 115 | 5 | 56 | 85 to 170 | 3 |
| 45 | 15 | 3 | 25 | 23 | 5.3 | 1600 | 100 | 145 | 5 | 68 | 70 to 140 | 3 |
| 45 | 15 | 3 | 47 | 42 | 5.3 | 1600 | 100 | 180 | 5 | 68 | 60 to 120 | 3 |
| 45 | 15 | 6 | 68 | 62 | 10.7 | 3100 | 100 | 280 | 5 | 68 | 61 to 120 | 3 |
| 45 | 15 | 6 | 82 | 75 | 10.7 | 3100 | 100 | 340 | 5 | 82 | 50 to 100 | 3 |
| 45 | 15 | 6 | 100 | 91 | 10.7 | 3100 | 100 | 470 | 5 | 100 | 40 to 80 | 4 |
| 45 | 15 | 6 | 120 | 109 | 10.7 | 3100 | 100 | 560 | 5 | 120 | 30 to 60 | 4 |
| 45 | 15 | 6 | 150 | 137 | 10.7 | 3100 | 100 | 690 | 5 | 150 | 25 to 50 | 4 |
| 45 | 15 | 6 | 180 | 164 | 10.7 | 3100 | 100 | 820 | 5 | 180 | 22 to 45 | 4 |
| 45 | 15 | 6 | 330 | 300 | 10.7 | 3100 | 50 | 1600 | 2 | 330 | 12 to 24 | 4 |
| 45 | 15 | 15 | 180 | 164 | 26.8 | 7640 | 100 | 1000 | 5 | 180 | 22 to 45 | 3 |
| 45 | 15 | 15 | 220 | 200 | 26.8 | 7640 | 100 | 1250 | 5 | 220 | 18 to36 | 3 |
| 45 | 15 | 15 | 270 | 246 | 26.8 | 7640 | 50 | 1500 | 5 | 270 | 15 to30 | 3 |
| 45 | 15 | 15 | 330 | 300 | 26.8 | 7640 | 50 | 1750 | 5 | 330 | 12 to 24 | 4 |
| 45 | 15 | 15 | 390 | 355 | 26.8 | 7640 | 50 | 2150 | 5 | 390 | 10 to 20 | 4 |
| 45 | 15 | 15 | 470 | 428 | 26.8 | 7640 | 50 | 2400 | 5 | 470 | 8.5 to 17 | 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.