lps 1100 www.vishay.com vishay sfernice revision: 05-sep-12 1 document number: 50059 for technical questions, contact: sfer@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 power resistor for mounting onto a heatsink thick film technology features ? lps high power: 1100 w ? wide resistance range: 1 ? to 1.3 k ? e24 series ?non inductive ? easy mounting ? low thermal radiation of the case ? material categorization: for definitions of compliance please see www.vishay.com/doc?99912 notes ? tolerances unless stated: 0.2 mm ? power dissipation is 1100 w by us ing a water cooled heatsink at t water = 15 c of r th = 0.059 c/w (25 c to the nearest point of the resistor onto heatsink) and r th contact estimated at 0.07 c/w. dimensions in millimeters standard electrical specifications model resistance range ? rated power p 25 c w tolerance % temperature coefficient ppm/c lps 1100 1 to 1.3k 1100 1, 2, 5, 10 150 2 x m4 useful depth: 8 57 34 60 36 2 x ? 4.2 lps 1100 i5u 5 % v2 64.7 15.2 21.2 25.2 13.6 ? 20 25.8 1 mechanical specifications mechanical protection insulated case and resin for potting ul 94 v-0 resistive element thick film end connections screws m4 tightening torque connections 2 nm tightening to rque heatsink 2 nm maximum torque 2.5 nm weight 79 g 10 % environmental specifications temperature range - 55 c to + 200 c climatic category 55/200/56 technical specifications power rating and thermal resistance 1100 w at + 25 c on heatsink r th(j-c) : 0.039 c/w temperature coefficient (- 55 c to + 200 c), iec 60115-1 150 ppm/c dielectric strength iec 60115-1, 1 min, 10 ma max. 7 kv rms or 12 kv rms insulation ? 10 4 m ? inductance ? 0.1 h
lps 1100 www.vishay.com vishay sfernice revision: 05-sep-12 2 document number: 50059 for technical questions, contact: sfer@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 recommendations for mounting onto a heatsink ? surfaces in contact must be carefully cleaned. ? the heatsink must have an acceptable flatness: from 0.05 mm to 0.1 mm/100 mm. ? roughness of the heatsink must be around 6.3 m. in order to improve therma l conductivity, surfaces in contact (ceramic, heatsink) should be coated with a silicone grease (type si 3 40 from blue star silicones). thermal film (type q-pad ii from berquist) is also possible, easier and faster to install than grease but with a lower effici ency for the power dissipation. ? the fastening of the resistor to the heatsink is under pressure control of two screws tightened at 2 nm for full power availability. ? the following accessories are supplied with each product: - 2 screws chc m4 x 25 class 8.8 and 2 m4 co ntact lock washers for heatsink mounting - 2 screws th m4 x 6/6 and 2 m4 contact lock wa shers for connections. 2 off chc m4 x 16/16 class 8 choice of the heatsink and the thermal interface the user must choose the heatsink according to the workin g conditions of the component (power, room temperature). maximum working temperature must not exceed 200 c. the dissi pated power is simply calculat ed by the following ratio: p: expressed in w ? t: difference between maximum workin g temperature and room temperature or fluid cooling temperature. r th (j - c) : thermal resistance value measured be tween resistive layer and outer side of the resistor. it is the thermal resistance of the component: 0.039 c/w. r th (c - h) : thermal resistance value measured betw een outer side of the resistor and uppe r side of the heatsink. this is the thermal resistance of the interface (grease, thermal pad), and the quality of the fastening device. r th (h - a) : thermal resistance of the heatsink. example: r th (c - h) + r th (h - a) for lps 1100 power dissipation 850 w at + 18 c fluid temperature. performance tests conditions requirements momentary overload iec 60115-1: 2 x p r /10 s for heatsink with r th(h-a) ? 0.26 c/w (maximum power: 700 w) 1.6 x p r /1 s for heatsink with 0.26 c/w > ? r th(h-a) ? 0.059 c/w (maximum power: 1800 w) (0.25 % + 0.05 ? ) rapid temperature change aec-q200 conditions: iec 60115-1/iec 60068-2-14, test na 50 cycles (- 55 c to + 200 c) (0.5 % + 0.05 ? ) for all the ohmic values 1000 cycles (- 55 c to + 200 c) (5 % + 0.05 ? ) for r < 38 u (0.5 % + 0.05 ? ) for r ? 38 u load life aec-q200 conditions: iec 60115-1 2000 h (90/30) p r (5 % + 0.05 ? ) for r < 38 u (0.5 % + 0.05 ? ) for r ? 38 u humidity (steady state) aec-q200 conditions: iec 60115-1, 1000 h rh 85 %/85 c (0.5 % + 0.05 ? ) mechanical shock aec-q200 conditions: mil-std-202 method 213 condition d (100 g s/6 ms 3.75 m/s) (1 % + 0.05 ? ) vibration aec-q200 conditions: mil-std-202 method 204 condition d (5 g , 20 min 10/2000 hz) (1 % + 0.05 ? ) climatic sequence aec-q200 conditions: iec 60115-1 (55/200/56) (1 % + 0.05 ? ) tightening torque on heatsink lps 1100 2 nm p ? t r th (j - c) ?? r th (c - h) ?? r th (h - a) ?? ++ --------------------------------------------------------------------------------------------- = ? t 200 c - 18 c 182 c = ? r th (j - c) r th (c - h) r th (h - a) + ? t p ------ - 182 850 --------- - 0.214 c/w == = + r th (j - c) 0.039 c/w = r th (c - h) r th (h - a) 0.214 c/w - 0.039 c/w 0.175 c/w == +
lps 1100 www.vishay.com vishay sfernice revision: 05-sep-12 3 document number: 50059 for technical questions, contact: sfer@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 note ? configuration 1: water cooling heatsink (cp15 from lytr on (304 mm x 95.3 mm x 8 mm) with wa ter flow rate 4lp m and thermal grea se si340 from bluestar silicones configuration 2: air cooling heatsink p2 07/250 from semikron (250 mm x 200 mm x 72 mm) and thermal grease si340 from bluestar silicones configuration 3: water cooling heatsink (c p15 from lytron (304 mm x 95.3 mm x 8 mm) wi th water flow rate 4lpm and thermal pad q-pad ii from berquist configuration 4: air cooling heatsink p 207/250 from semikron (250 mm x 200 mm x 72 mm) and thermal pad q-pad ii from berquist overload in any case the applied voltage must be lower than u i = 6600 v. short time overload: 2 x pr/10 s for heatsink with r th(h-a) ? 0.26 c/w (maximum power: 700 w) and 1.6 x pr/1 s for heatsink with 0.26 c/w > r th(h-a) ? 0.059 c/w (maximum power: 1800 w). accidental overload: the values indicated on the following graph are applicable to resistors in air or mounted onto a heatsink. energy curve marking series, style, ohmic value (in ? ), tolerance (in %), manufacturing date, vishay sfernice trademark. power rating the temperature of the case should be maintained within the limit specified in the following figure. to optimize the thermal conduction, cont acting surfaces should be coated with silicone grease or thermal film, and heatsink mounting screws tightened to 2 nm. config. 1: water cooling heatsink cp15 and thermal grease si340 config. 2: air cooling heatsink p207/250 and thermal grease si340 config. 3: water cooling heatsink cp15 and thermal pad q-pad ii config. 4: air cooling heatsink p207/250 and thermal pad q-pad ii power dissipation (w) 1100 350 650 285 t resistive element (c) 200 200 200 200 r th(j-c) max. (c/w) 0.039 0.039 0.039 0.039 r th(c-h) typ. (c/w) 0.070 0.201 0.187 0.315 r th(h-a) max. (c/w) 0.059 0.260 0.059 0.260 fluid t (c) 15 (water) 25 (air) 15 (water) 25 (air) energy in j 0.01 0.1 1 10 100 10 000 overload duration in s 1 10 -7 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 1000 packaging box of 15 units 0 20 40 60 80 100 rated power in % heatsink temperature in c 200 0175 150 125 100 75 50 25 ordering information lps 1100 1 k ? 1 % xxx bo15 e model style resistance value tolerance custom design packaging lead (pb)-free 1 % 2 % 5 % 10 % optional on request: special tcr, shape, etc.
lps 1100 www.vishay.com vishay sfernice revision: 05-sep-12 4 document number: 50059 for technical questions, contact: sfer@vishay.com this document is subject to change without notice. the products described herein and this document are subject to specific disclaimers, set forth at www.vishay.com/doc?91000 global part number information global model dielectric ohmic value tolerance packaging special lps 1100 l = dielectric strengh 7 kv h = dielectric strengh 12 kv the first three digits are significant figures and the last digit specifies the number of zero s to follow. r designates decimal point. 48r7 = 48.7 ? 47r0 = 47 ? 1001 = 1 k ? 4r70 = 4.7 ? r240 = 0.24 ? f = 1 % g = 2 % j = 5 % k = 10 % b = box 15 pieces n = box 15 pieces n/a as applicable zax j b s1100h4 r l p 70
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