12pcs Voltage Dependent Resistors, 17V AC 10D270K Varistors with Radial Pins, 10.5mm Diameter Disc, Overvoltage Current Protector for Circuit Protection

This is a varistor (MOV) that protects electronic circuits from voltage spikes and surges by limiting excess voltage. Commonly used in power supplies, industrial controls, smart homes, and DIY projects, it protects sensitive components from transients caused by voltage spikes or power supply fluctuations, ensuring stable operation in AC/DC systems. Model: 10D270K; Varistor Voltage: 27V (range 24~30V); Maximum Allowable Voltage: AC 17V / DC 22V; Maximum Clamping Voltage: 53V; Maximum Surge Current (8/20μs): 1000A; Maximum Energy Absorption: 3.9J; Reference Capacitance: 3900pF; Pin Type: Dual Straight Pins; Size: 10.5mm x 40mm / 0.41" x 1.57" (Dia. x L); Pin Spacing: 7.5mm / 0.3"; Packaging: 12 Varistors
The resistor is made of zinc-oxide film, with a disc structure coated with a special epoxy resin and radial leads. It offers low loss, high working voltage, excellent stability, stable capacitance, and high-temperature resistance. Its compact design provides high capacitance, excellent moisture resistance, and reliable overall performance.
Connect the varistor in parallel with the circuit or component you wish to protect, such as the power input terminals. Ensure the leads are securely soldered to the PCB or terminals, requiring no manual activation.
Select a varistor that matches your circuit's working voltage and surge current requirements to maintain high impedance during normal operation. Ensure the working voltage never exceeds its maximum value. Avoid prolonged overvoltage, replace if damaged or worn, and store in a dry environment for reliable protection.