MEFK series cylindrical thick film high-voltage resistor, leadless surface mount package (SMD) thick film high-voltage resistor technical characteristics 1. Coating package, color ring logo, applicable to electronic circuits with high precision requirements, MEF cylindrical surface mount (SMD). 2. Small size, low cost, no lead cylindrical shape, and the maximum working voltage does not exceed 7000V (DC). 3. Voltage coefficient: max. - 2ppm/V4. Nominal resistance value deviation: generally ± 5.0% (J). For negotiated orders, ± 2.0% (G) and ± 1.0% (F) can be achieved. 5. Temperature coefficient: generally ± 200ppm/℃ (without identification) (measuring temperature range - 15 ℃~+105 ℃). For negotiated orders, ± 100ppm/℃ (C1) and ± 50ppm/℃ (C2) can be achieved. 6 Working temperature range: - 55 ℃~+155 ℃ Size (mm) Model MEFK0207MEFK0208 Rated power (70 ℃) (W) 0.50.75 Rated working voltage (V) Maximum working voltage (V) 35007000 Size (mm) L ± 0.35.68.5D ± 0.32.153C ± 0.11.41.9 Resistance range 100K~100M exceeds the above resistance range, which can be supplied through negotiation. Main periodic inspection items and methods of power reduction curve Inspection type Items and methods Long term inspection life 70 ℃, rated power, 1000hMEFK0207: Δ R ≤± 3% R Other models: Δ R ≤± 1.5% R Humidity resistance - 10 ℃～+65 ℃, RH ＞ 90%, cycle for 240h, rated power Short term test Dielectric withstand voltage 1000VDC, duration for 1min, no mechanical damage, flashover, insulation breakdown shock GJB360A Method 213, no mechanical damage, flashover, insulation breakdown Δ R ≤± 0.5% R Method of high-frequency vibration GJB360A 204 Resistance to welding heat 260 ℃± 5 ℃ 10 ± 1s Short time overload 2.5 times the rated power, but the corresponding rated voltage shall not exceed 1.5 times the maximum working voltage, lasting for 5s Solderability Bath temperature: 255 ± 5 ℃ Welding filler metal coating, immersion time 2S Surface S ≥ 95% Applicable standard