Series VPA & VKA pA eds es] Pee ee ee ea eae uit aol site Wirewound bithencle Description The VPA and VE.A adjustable-power resistors are excellent for applications requiring settings at different resistance values. The resistors come equipped with an adjustable slider lug, making them ideal for adjusting circuits, obtaining odd resistance values, and setting equipment to meet various line voltages. The WPA and VEA series are made in accordance to MIL-R-26 standards. These resistors can be bracket mounted. Features bie CANTING ED *Adjustable slider lug *Rugged vitreous enamel *All-welded constructian *Meets or exceeds MIL-R-19365 standards. Series VPA & VKA Material Specifications Coating Vitreous enamel Care Tubular ceramic Terminals Tinned, lug terminals, solderable to MIL-R-26 Weight VPIOFA VPISKA VPSOKA VEIOONA VWELGOWA WROD A watt 25 watt 50 watt [wan = 160 watt = 20) watt 52 oz 8 az. L.44 o7, 3.2 Oz. az 9.92 oF. $8.96 ems. 224 ems. 40.2 gms. B96 gms. 224 pms. 277.8 gms. Series VPA & VKA Electrical Specifications Resistance Tolerance +10% standard Closer tolerances available. Power Rating Based on 25C free air rating Standard Maximum series Wattage Wattage VPLOPFA 10 12 VP25KA 25 NA VPSOKRA 50) NFA VELOONA 100 NIA VE L60WA 160 [75 VR 200W A 200 225 Wea = Mor applicable. Figure f Series VPA & VKA Derating Pel. mn = 8 _ Ge = | PER CENT RATED LOAD & +5 +0 +100 a0 +200 +0 +300 +0 AMBIENT TEMPERATURE IN DEGREES CENTIGRADE Electrical Specifications continued, next pope 169Electrical Specifications, continued SSA Ee a LCS ene cee nit mel tte Overload 10 times rated wattage for 5 seconds Stock Values Sabah ; Temperature Coefficient aeATT ries ADUSTABLE +100 oC | 20 250 800 4500 B00 =U ppm 2 25 30K) 1000 e000 8500 3 50 330 [350 4500 oO Dielectric Withstanding Voltage 4 "5 400 1300 5000 iok LOO0 Vac re 100) StH 2240 eC) Jo 150 OO 2300 7OOO When dual wattages are shown: ts 200 750 1000 7500 - = ' om. Lower wattages have maximum hotspot 275C; 25 WATT Vienica ADJUSTABLE Higher wattages have maximum hotspot 340C. ia - = ! 20 200 200 6000 15K . ; : oe F Fy 400 2250 70K 20K Staied wattage apnites only when full resistance is in the circuit, 4 sq 500 300 7200 25K Setting the sitder lug af an intermediate point reduces the wattage 4 25 730 1000 Ta) rating by the appracimate same Proportion. 5 1 Bot 4500) BEM 1 150 1000 40K) O00 . ; IG 200 1250 4500 LOK, Example: Lug at 50%, wattage is reduced by 50%, san fan Aas tae Figure? a $0 WATT VPSOKA ADJUSTABLE ~ : | So Sa 2500) Fath) 25K. Z 74 50 SCH) 7300) a0K ] (G0 B00 4500 B00 35K 4 150 Lod 4000 s000 40K 5 2h 1250 #500 10K 50K 1G 250) 1500 S000) Lak 60K 20 30) 200) O00 ISK 75K. Serles VPA Dimensions 25 4K) 7250 TK) 20K 100K MA WATT VERIOONA ADJUSTABLE a 18 20 isc) 5K WSK 2 14 300) 2000) 20K, 100K ei . 3 50 40K 20g 25K Oo} | \ 4 100 500 450K 30K 3 i Fy 5 et] 750 SCH ACK to 2 100K) 10K SOK tok ereoaner E fx c f Uh TI A ) 195 WATT VRIGOWA ADJUSTABLE t a | 1 1 230 SCN) 40K 2 a5 S00 DOK s0K Sums a so 1oGo 15K 50K 4 100 1500 20K THK 5 iso 250) 25K 1K 225 WATT VR200WA : ADJUSTABLE = ~~ Y Tt 100 500 10K SOK Age BF ct 2 20 Ls Loon 15K 75K = - 3 25 200 1500 20K hook 4 40 250 2500 25K VPLOFA 13 1.750 Lag 55 an) $000 a VP25IKA be 2.000 aa _.. Wekep ; : 3 Special resistance values available. VPSOKA 382 #000 ado Mounting brackers sald separately, For specials, please consult Factory, VRLOONA -- DISCONTINUED --- - - Series Bracket Number VELGOWS asses DISCONTINUED ----- VEIOFA F-100 See eS VERSA K-10 VIEQOOWA sees DISCONTINUED --- VPSORA K-100 u VEIOONA N- LOK) VE LGW A W'- L OK VE200W a W-100 * Maximum Dimensions Series VPA & VKA How To Order Series/Wattage + Resistance Value = Part Number Example: 25 watt adjustable + 150 ohms = VP25KA-150 to, 160