80mm OD Silicon Carbide Varistors Disks

80mm 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
80	20	7	232	211	22.1	9900	100	1100	10	220	4 to 12	5
80	20	10	18	16	31.5	16910	10000	390	100	24	340 to 450	3
80	20	10	94	85	31.5	16910	10000	850	100	50	20 to 40	3
80	20	10	80	73	31.5	16910	1000	340	10	80	20 to 40	4
80	20	10	150	137	31.5	16910	1000	630	10	150	20 to 40	4
80	20	10	170	155	31.5	16910	1000	850	10	200	35 to 70	4
80	20	10	220	200	31.5	16910	1000	1050	10	220	24 to 36	4
80	20	10	275	250	31.5	16910	100	1400	10	250	15 to 30	4
80	20	10	308	280	31.5	16910	100	1400	10	365	30 to 50	5
80	20	10	400	364	31.5	16910	100	1700	10	400	12 to 24	5
80	20	10	400	364	31.5	16910	100	1500	10	500	30 to 50	5
80	20	10	350	319	31.5	16910	100	1400	10	500	50 to 100	5
80	20	10	580	528	31.5	16910	100	2200	10	600	10 to 20	5
80	20	10	700	637	31.5	16910	10	3400	100	700	10 to 20	5
80	20	10	700	637	31.5	16910	10	3900	100	700	10 to 20	5
80	20	20	28	26	62.2	32990	15000	900	100	50	150 to 300	3
80	20	20	28	25	62.2	32990	15000	1500	100	75	50 to 100	3

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.