FNR-07K181

FENGHUA ZINC OXIDE VARISTOR Fenghua (HK) Electronics Ltd. Unit 207, Fu Hang Industrial Building, No.1, Hok Yuen Street East, Hung Hom, Hong Kong Tel: 852-2408-7636 Fax: 852-2408-8859 Email: [email protected] URL: www.fenghua.com ZINC OXIDE VARISTOR FEATURES z z z z z Widely voltage range 18v-1.8kv Fast response to the rapidly increase Voltage (Mu sec.) Excellent non-linearity voltage Symmetric V-1 characteristics Great withstanding surge current (2000A/cm2) HOW TO ORDER F Series Code F NR Non-Linear Resistor NR 05 Element Diameter (mm) 05 5 40 40 K Tolerance K M ±10% ±20% 180 Varistor (V) 180=18x10 1 181=18x10 2 182=18x10 0 T bulk dimensions (leave blank) T Bulk Tape & Reel CHARACTERISTICS TEST CONDITION Item Operating Temperature Range Storage Temperature Range Varistor Voltage Max Clamping Voltage Energy Max Withstanding Surge Current Test Methods -40°C~+85°C -40°C~+125°C Element Diameter<5mm Test Current 0.1mA(DC) Element Diameter≥5mm Test Current 1mA(DC) Current Wave shape 8x20μs Current input of Rectangular Wave Current Wave shape 8x20μs www.fenghua.com 1/8 ZINC OXIDE VARISTOR ZINC OXIDE VARISTOR SELECTION (ONLY REFERENCE) Varistor voltage Varistor voltage should be more than the operating voltage in over-voltage protective circuit The formula is shown as the following: V1mA+a.v/b.c a-power Voltage ripple coefficient usually take 1.2 v-DC Voltage (significant value only AC power) b-Tolerance usually take 0.85 c-Ageing coefficient usually take 0.9 The calibrated Va...