VR25, VR37, VR68 HIGH OHMIC / HIGH VOLTAGE METAL GLAZE RESISTOR PRODUCT OVERVIEW
MAIN FEATURES OF THE VR25, VR37, VR68 SERIES Three sizes: VR25 (0207), VR37 (0309), and VR68 (0718) Rated power, P70: 0.25W, 0.5W, 1W Resistance range and tolerance: 100KΩ to 68MΩ, 1%, 5% and 10% AEC-Q200 qualified (VR25, VR37) UL Approved (UL1676, file no: E171160, VR37 and VR68) Meet the safety requirements of: IEC 60065, EN 60065, VDE 0860, CQC China (VR37, VR68) Meets flammability requirements according to IEC-60115-1, 4.
MAIN FEATURES OF THE VR25, VR37, VR68 SERIES The VR25 series is offered from 100KΩ to 22MΩ with 1%, 5% and 10% tolerances, VR37 from 100KΩ to 33MΩ with 1%, and 5% tolerances while the VR68 is available from 100KΩ to 68MΩ with 1% and 5% tolerances. The VR25, VR37 and VR68 are rated to 0.25W, 0.5W and 1W, with continuous working voltage of 1,600V, 3,500V and 10,000V, respectively.
CONSTRUCTION OF VR25, VR37, VR68 SERIES A metal glazed film is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned electrolytic copper wires are welded to the end-caps. The resistors are coated with a light blue lacquer which provides electrical, mechanical, and climatic protection.
HIGH VOLTAGE FEATURES Maximum allowed peak pulse voltage in accordance with IEC 60065, 14.2 50 discharges from a 1nF capacitor charged to Ûmax; 12 discharges/min (drift dR/R ≤ 2 %) The peak voltage graphs above, as a function of the resistance value, show the pulsed high voltage capability for each VR resistor size, with capability up to 7kV for the VR25 and 10kV for VR37 and VR68, in accordance with IEC 60065 standard, clause 14.2, for a 1nF capacitor discharge test.
HIGH VOLTAGE FEATURES Working voltage of VR series versus standard axial leaded resistor Continuos Operating Voltage (V) 10000 1000 100 100000 VR25 (0207) VR37 (0309) VR68 (0718) 1000000 10000000 100000000 Resistance Value (ohms) std 0207 (350V) std 0309/0411/0414 (500V) std 0718/0617/0922 (750V) The working voltage graph above, as a function of the resistance value, shows the working voltage of VR series versus standard axial leaded resistor with compared sizes: 0207, 0309 and 0718.
APPLICATIONS Solar Inverters Wind Power Ballast Home Appliances Monitors Set Top Box Power Supply Traffic Light Module Heater Control Module Head Lamps These High Ohmic / High Voltage Metal Glaze resistor series are especially designed where high resistance, high stability, and high reliability at high voltage are required, including high humidity environment, white goods, and power supplies, besides other applications in the following market segments: alternative energy, indust
