Series VPA & VKA Series VPA & VKA Malerial Specifications 10. 25. 50. 100, 160-175, 200-225 Watt Adjustable-Power. Wirewound Resistors Pic a Core Tubular ceramic Coating Vitreous enamel Terminals Tinned, lug terminals, solderable to MIL-R-26 VPIOFA = VP25KA VPSOKA VKLOONA VKI6GOWA VK200WA 10 watt = 25 watt SO watt 100 watt 160 watt 200 watt 32 oz. 8 02. 1.44 oz. 3.2 02. 8 oz. 9.92 oz. 8.96 gms. 22.4 gms. 40.3 gms. 89.6 gms. 224 gms. 277.8 gms. Series VPA & VKA Electrical Specilications Resistance Tolerance wise toe cn ~ ee ee = 10% standard Description Closer tolerances available. The VPA and VKA adjustable-power resistors are poner eae free air rati excellent for applications requiring settings at different pased ~~ fee air ang resistance values. The resistors come equipped with an Standard Maximum adjustable slider lug, making them ideal for adjusting Series Wattage Wattage circuits, obtaining odd resistance values, and setting we mee i ee equipment to meet various line voltages. The VPA and = =VPIOFA 10 12 VKA series are made in accordance to MIL-R-26 VP25KA 25 N/A standards. These resistors can be bracket mounted. VPSOKA 50 N/A VKIOONA 100 N/A 2 O10) 0)),'0- 160 175 Features VK200WA 200 225 N/A = Nat applicable. *Adjustable slider lug ST nner a *Rugged vitreous enamel Figure 1 -All-welded construction Series VPA & VKA Derating Meets or exceeds MIL-R-19365 standards. MN ) oS $0 ~~, 3 = PER CENT RATED LOAD +3 +50 +100 +10 +200 +20 +m +%0 AMBIENT TEMPERATURE IN DEGREES CENTIGRADE Electrical Specifications continued, next page 159Electrical Specifications, continued Series VPA & VKA Standard Resistance Values Overload 10 times rated wattage for 5 seconds Stock Values T, ture Coefficient 12 WATT VPIOFA ADJUSTABLE rature Coefficien +100 eC 1 20 250 800 3500 8000 = ppm/ 2 25 300 1000 4000 8500 3 50 350 1250 4500 9000 Dielectric Withstanding Voltage 5 75 400 1500 5000 10K 1000 Vac 75 100 500 2250 6000 10 150 600 2500 7000 When dual wattages are shown: 15 200 750 3000 7500 Lower wattages have maximum hotspot 275C; Lower watlages Have maximum NOrspot <7 2WATT _ss_VP25KA_ ADJUSTABLE