HS Cylindrical High Voltage ,Low TCR & VCR Resistors,Thick film,Non-Inductive High Voltage Non-Inductive Resistors for HV Dividers, Precision HV circuits Willow offers our HS series for applications demanding Low TCR & Low VCR requirements. Specially designed for High Voltage Functional Non-Inductive Divider Sets & High Voltage Precision Measurement systems. HS Precision High Voltage Resistor, Non-Inductive Thick Film Epoxy conformal full coat for excellent humidity protection Resistance tolrerance offered : 0.5% 1% 2% 5% (0.1% special upto 100Megohm of HS15 HS19 HS25) * Temperature Coefficient of Resistance: 75ppm/ºC std. and (20ppm/ºC 35ppm/ºC 50ppm/ºC 60ppm/ºC 85ppm/ºC as special) * Load Life Stability of 0.25% per 1000hours at rated power. * Resistance range : 100kΩ to 1GΩ, and extended to 100Terohms * Various Models related with Voltage Ratings from 2.5kV to 48kV in free air. * NCR: Non-contact resistance design between resistive parts and termination. Model Nr. Wattage in 25˚C free air 1) Wattage in Molded 2) Max. Working Voltage[kV] Impulse Voltage [kV] 1.2/50μS Std. Resistance [ ohm ] Min. Max. 100K 500M 100K 500M 100K 500M 100K 500M Extended Resistance [ ohm ] see URseries see URseries see URseries see URseries see URseries see URseries HS15 0.2 N/A 2.0 4.0 HS19 0.3 N/A 2.5 5.0 HS25 0.5 N/A 4.5 9.0 HS24 1.5 N/A 4.0 8.0 HS39 2.5 0.8 10.0 20 100K 1G HS52 3.0 1.0 15.0 30 100K 1G HS76 4.5 1.5 22.5 40 1M 1G upto 10T HS102 6.0 2.0 32.0 50 1M 1G upto 100T HS117 7.0 2.3 35.0 60 1M 1G 1K~900K HS127 7.5 2.5 37.0 65 1M 1G HS137 8.0 2.7 40.0 70 1M 1G 1K~900K HS152 9.0 3.0 48.0 77 1M 1G upto 100T Specifications subject to change without notice Dimensions in millimeters (inches) A B 15+/-1.5 (.590) 19+/-1.5 (.748) 25.4+/1.5 (1.0) 24.0+/1.5 (.944) 39.0+/1.5 (1.50) 52.0+/1.5 (2.04) 76.0+/-2 (3.0) 102+/-2 (4.01) 117+/-2 (4.6) 127+/-2 (5.0) 137+/-2 (5.4) 152+/-2 (6.0) 5+/-1.5 (.197) 5+/-1.5 (.197) 5+/-1.5 (.197) 8+/-1.0 (. 314) 8+/-1.0 (. 314) 8+/-1.0 (. 314) 8+/-1.5 (. 314) 9+/-1.0 (. 354) 9+/-1.0 (. 354) 9+/-1.0 (. 354 9+/-1.0 (. 354) 9+/-1.0 (. 354) SMD type C 0.8 N/A 0.8 N/A 0.8 N/A 1.0 available 1.0 available 1.0 available 1.0 on request 1.0 N/A 1.0 N/A 1.0 N/A 1.0 N/A 1.0 N/A Issue 11-2011 Willow Technologies Ltd. Unit 3 Borers Yard, Borers Arms Road, Copthorne, West Sussex, RH10 3LH, United Kingdom. + 44 (0) 1342 717102 + 44 (0) 1342 717104 [email protected] http://www.willow.co.uk HS Cylindrical High Voltage ,Low TCR & VCR Resistors,Thick film,Non-Inductive S PECIFICATIONS DIMENSIONS [mm] 35 ± 5 B A Resistance Tolerance : 1% 2% 5% & 0.5%. And special tolerance (from 0.1MΩ to 100MΩ ; 0.1%, 0.25% as special order available upon request for HS15 HS19 HS25 ) C Endurable Harsh to Environment (Temperature ): -55ºC to +195°C , Max. brokable temperature on resistives is 600? (for 70min.) Rated Power or Voltage% DERATING CURVE Temperature Coefficient of Resistance: Std. 75ppm/°C referenced to 25°C, ΔR taken at -25ºC and +70°C, Other special TCR on request ( 20ppm/°C, 35ppm/°C, 50ppm/°C, 60ppm/°C ,85ppm/°C ) 100 80 60 Overload/Voltage : 5 times rated power with applied voltage not to exceed 1.5times maximum continuous operating voltage for 5 seconds ΔR 0.2% max. 40 20 0 25 75 125 175 195 225 Ambient-Temperature (˚C) * Rated power , and voltage of % APPLICATION GUIDE ; HS SERIES • Automated Test (ATE) • Detectors • Medical (Imaging) • Nuclear Instrumentation • Ion Source • Electron Beam • Chromatography (Gas) • Pulse Generators • Medical (Radiation Therapy) • Surface Analysis • Military , Radar ,Laser ,Plasma •CT, • Measurements (High Voltage) • Image Intensifier * HV Capacitor Charging, Discharging MRI • Electrophoresis • Surface Analysis • Piezo. Focusing (Poling) • Electric Power Transmission High Voltage • High Voltage Dividers • Medical (Blood Analyzers) • Agricultural Sensors • Corona Generators • Klystron, Magnetron ,Microwave • Multichannel Analyzers • Stress Testing Thermal Shock : Mil-Std-202, Method- 107, Cond. C, ΔR 0.2% max. Load Life : 1.000 hours at rated power ΔR 0.2% max. Moisture Resistance : Mil-Std-202, Method 106, ΔR 0.25% max. Lead Material : Tinned plated copper solsderable semi-flexible axial wire. Insulation Resistance : 10,000MΩ Min. Termination Cap of Material: Tinned Cap. Encapsulation : Epoxy conformal. Resistive Material : Thick Film. Contact method between Resistives and Termination Caps : Individual Conductive Pads . So , called "NCR" Non-contact resistance. • Ozone Generating + Voltage restricted by the rated power 1) in fully epoxy/or silcone rubber molded case condition, precision high voltage dividers required very long life stability in harsh condition 2) Vdc, Vrms standard. Specifications subject to change without notice Issue 11-2011 Willow Technologies Ltd. Unit 3 Borers Yard, Borers Arms Road, Copthorne, West Sussex, RH10 3LH, United Kingdom. + 44 (0) 1342 717102 + 44 (0) 1342 717104 [email protected] http://www.willow.co.uk HS Cylindrical High Voltage ,Low TCR & VCR Resistors,Thick film,Non-Inductive Voltage Coefficient of Resistance (VCR) Temperature Voltage Resistance Tolerance [%] R-Range 1GΩ to 10GΩ 10.1GΩ to 300GΩ 301GΩ to 1TΩ 1.1TΩ to 10TΩ [ppm/°C] 200 300 1000 1500 R-Range 10GΩ to 19GΩ 20GΩ to 100GΩ 200GΩ to 1TΩ 10TΩ VCR 0.002%/V 0.007%/V 0.01%/V 0.05%/V R-Range 1GΩ 2GΩ ~10GΩ 20GΩ ~ 100GΩ 200GΩ~1TΩ 10TΩ Std. +/-1%(F) +/-2%(G) +/-5%(J) +/-10%(K) +/-20% Custom +/-0.5 +/-1% +/-2% +/-5% +/-10% Specifications subject to change without notice ΔR taken at 25ºC and 70ºC Measured at 100vdc and 1000vdc Measured at 1000vdc Standard Issue 11-2011 Willow Technologies Ltd. Unit 3 Borers Yard, Borers Arms Road, Copthorne, West Sussex, RH10 3LH, United Kingdom. + 44 (0) 1342 717102 + 44 (0) 1342 717104 [email protected] http://www.willow.co.uk