حفاظت مدار وریستور (ام او وی)

Product Attributes

Introduction

The varistor's primary material is zinc oxide, with blue flame-retardant epoxy resin encapsulation (compliant with UL94V-0). The appearance is free of stains and cracks, with clear markings. Dimensional specifications: maximum diameter D of 9.0mm, maximum height H of 12.0mm, maximum thickness T of 4.3mm, and lead length L of 3.0±1mm.

Electrical characteristics: maximum continuous AC working voltage of 150VRMS, maximum DC voltage of 200V. At 1mA DC, varistor voltage U1mA ranges from 216 to 264V, with leakage current not exceeding 10uA. Voltage temperature coefficient: -0.05%/°C max. Clamping voltage: peak voltage between electrodes not exceeding 395V under an 8/20us surge waveform at 10A peak. Maximum peak current of 1250A, capable of withstanding the maximum surge current peak at 8/20us waveform. Rated power and pulse current stability: 0.25W and 10⁴ pulses — the varistor can withstand maximum average power under a pulse burst of 8/20us waveform, 100A peak, 3.51s interval, and 10⁴ pulses. Maximum energy of 15J, capable of withstanding maximum surge energy under a single 10/1000us square wave current. Capacitance: 200pF (reference value), measured at 1kHz±10%, signal level ≤1VRMS, zero bias.

Environmental characteristics: under dry heat, cyclic damp heat, and cold climate sequence conditions, varistor voltage variation does not exceed ±5% with no visible mechanical damage. Under steady-state damp heat conditions, varistor voltage variation does not exceed ±5% with no visible mechanical damage. Under rapid temperature change conditions, varistor voltage variation does not exceed ±5% with no visible mechanical damage. Under upper category temperature endurance conditions, varistor voltage variation does not exceed ±10% with no visible mechanical damage. Under damp heat endurance conditions, varistor voltage variation does not exceed ±10% with no visible mechanical damage.

Mechanical characteristics: the varistor performs well in vibration, shock, solderability, resistance to soldering heat, and terminal strength tests, with varistor voltage variation not exceeding ±5% and no visible mechanical damage.

General characteristics: operating temperature range of -40°C to +85°C, storage temperature range of -40°C to +125°C, dielectric withstanding voltage ≥2500VAC.