حفاظت مدار وریستور (ام او وی)

Product Attributes

Introduction

A varistor has the volt-ampere characteristics in which current suddenly starts to flow through the device at a certain voltage. The varistors are used to protect components in electronic and electric circuits from overvoltage. As shown in following figure, a varistor is inserted in parallel with a circuit to be protected. When a pulse is applied to the circuit, pulse current Is, which is determined by pulse voltage Vs and pulse impedance Zs, flows to limit the pulse voltage to the varistor limit voltage Vc. The varistors are used to protect components in electronic and electric circuits from overvoltage. As shown in following figure, a varistor is inserted in parallel with a circuit to be protected. When a pulse is applied to the circuit, pulse current Is, which is determined by pulse voltage Vs and pulse impedance Zs, flows to limit the pulse voltage to the varistor limit voltage Vc.

Features

• RoHS 2.0, REACH compliant, halogen-free available
• Safety certification
• Standard type (D type): 85°C to 125°C derating factor: 2.5% per °C
• Temperature coefficient of varistor voltage: 0 to -0.05 %/°C max
• Storage temperature range: -55°C~+125°C
• Isolation voltage: 2500V 60s (body insulation)

Applications

• Consumer electronics: TV, audio output devices, safety plugs, STBs, etc.
• Industrial products: motors, semiconductor components, relays, electromagnetic switches, power circuits, three-phase rectifier circuits, automatic control circuits, etc.
• Communication equipment: telephones, fax machines, switchboards, etc.
• Computers: computers, monitors, printers, scanners, power supplies, adapters, etc.
• Automotive electronics