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

• Compliant with RoHS 2.0, REACH, and halogen-free available.
• Safety certification
• 18V~360V is only applicable to GB/T 10193-1997, GB/T 10194-1997
• Additional test for 10D, 14D, 20D series: Annex Q of IEC 60950-1:2005/A2:2013, clause 14.13 of IEC 60065:2014 and clause G.8.1 of IEC 62368-1:2018.
• Standard type 85°C to 125°C derating factor: 2.5%/°C; 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~+150°C
• Isolation voltage: 2500V 60s (body insulation)

Applications

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