1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 144 tap1000 & 2000 1000 & 2000 watt heat sinkable planar resistor element thick film on alumina substrate power rating 1000w or 2000w at 85c mounting plate resistance values 0.5 to 1000 resistance tolerance +10% std. max operating voltage 2000vdc temperature coefficient 250 ppm/c dielectric strength 6kv standard operating temperature range -55c to 85c terminal screws #10-32 max contacts torque 10 in-lb mounting screws #8-32 max mounting torque 15 in-lb creepage distance 50mm 1mm (min) 100 percent rated w atts bottom of base plate temperature, c 60 20 0 150 80 40 25 100 125 05 08 5 rating test continuous pulse rated power, max. current and heat sink plate temperature limited (ta1k0) 1000w (ta2k0) 2000w operating voltage p*r n/a max. applied voltage, ohms law limited 223v 2000vdc max. current 10a 53.33a critical resistance; below this resistance max power has to be de-rated due to exceeding max current (ta1k0) 10 (ta2k0) 20 test method maximum ?r short time overload 1.14 x p*r / 10 sec @ 70c max % ?rsto = (2% + 0.05) moisture resistance (ta1k0) 1000 hrs @ 40c, 90-95% rh (ta2k0) 1750 hrs @ 40c, 90-95% rh 1% 1% thermal shock mil-std-202, method 107 mil-std-202, method 107 vibration, elec. mil-std-202, method 201 2% resistance vibration, mech. mil-std-202, method 201 no loose terminal screws load life (ta1k0) 1000 hrs 90 min on / 30 min off (ta2k0) 1750 hrs 90 min on / 30 min off 1% 1% pulse tolerance 52f @ 2kv / 60 sec intervals, 104j, 20,000 pulses 1% dielectric strength 6kvdc for 1 minute 1% the tap series delivers 1000w or 2000w of contin - uous power when properly mounted to a liquid cooled heat sink (based on 85c mounting plate tempera - ture) applications include power conditioning, power distribution, power conver - sion, and power control. fe atures ? high energy rating ? low inductance ? resistor element electrically isolated ? high dielectric strength ? small footprint applic ations ? power semiconductor balancing ? motor control ? inrush current limiting characteristics derating (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 145 test method maximum ?r short time overload 1.14 x p*r / 10 sec @ 70c max % ?rsto = (2% + 0.05) moisture resistance (ta1k0) 1000 hrs @ 40c, 90-95% rh (ta2k0) 1750 hrs @ 40c, 90-95% rh 1% 1% thermal shock mil-std-202, method 107 mil-std-202, method 107 vibration, elec. mil-std-202, method 201 2% resistance vibration, mech. mil-std-202, method 201 no loose terminal screws load life (ta1k0) 1000 hrs 90 min on / 30 min off (ta2k0) 1750 hrs 90 min on / 30 min off 1% 1% pulse tolerance 52f @ 2kv / 60 sec intervals, 104j, 20,000 pulses 1% dielectric strength 6kvdc for 1 minute 1% ta 1k0ph2r50ke style pa ck ag e t ype resistance 2.5 = 2r50 50 = 50r0 t olerance k = 10% (standard) l = 20% w attage rohs compliant 0.798" (20.26mm) 3.000" (76.20mm) ?10-32 1.308" (33.21mm) 0.193" (4.89mm) 1.622" (41.20mm) 0.689" (17.50mm) ?0.172" (4.37mm) 0.450" (1 1.43mm) 0.300" (7.62mm) 0.188" (4.76mm) 1.308" (33.21mm) (same dimensions) 1000 watt ohms 10% tolerance 0.5 ta1k0phr500ke 1 ta1k0ph1r00ke 2.5 ta1k0ph2r50ke 5 ta1k0ph5r00ke 7.5 ta1k0ph7r50ke 10 ta1k0ph10r0ke 15 ta1k0ph15r0ke 25 ta1k0ph25r0ke 50 ta1k0ph50r0ke 100 ta1k0ph100rke 250 ta1k0ph250rke 500 ta1k0ph500rke 750 ta1k0ph750rke 1000 ta1k0ph1k00ke 2000 watt ohms 10% tolerance 0.5 ta2k0phr500ke 1 ta2k0ph1r00ke 2.5 ta2k0ph2r50ke 5 ta2k0ph5r00ke 7.5 ta2k0ph7r50ke 10 ta2k0ph10r0ke 15 ta2k0ph15r0ke 25 ta2k0ph25r0ke 50 ta2k0ph50r0ke 100 ta2k0ph100rke 250 ta2k0ph250rke 500 TA2K0PH500RKE 750 ta2k0ph750rke 1000 ta2k0ph1k00ke applic at ion notes proper heat sinking techniques are essential to performance of a tap resistor. pleased follow these guidelines when designing tap system: ? heats sink plate (base plate of the resistor) temperature must be monitored to establish proper de-rating. best tech - nique is to attach a thermocouple to the side of the base plate of the resistor. temperature of plastic housing or heat sink cannot be used to establish rating of the resistor. usage of laser thermometers should be avoided. ? to obtain a power rating of 1000w or 2000w, the bottom case temp must not exceed 85c. this can only be achieved if the thermal conduction to the heatsink rth-cs<0.025k/w. this value can be reached by using thermal transfer com - pound with a heat conductivity of 1w/mk. the flatness of the cooling plate must be better than 0.05mm overall. the roughness of the surface should not exceed 6.4m. ? due to very high power density, only liquid cooled heat sinks are recommended for applications when >300w power rating is desired. ? properly designed heat sink should have more than 2 cooling pipes under the surface of the tap resistor. the ohmite cp4 heat sink (http://www.ohmite.com/cat/sink_cp4.pdf) is an example of properly designed heat sink. tap1000 & 2000 1000 & 2000 watt heat sinkable planar standard part numbers ordering in form ation dimensions (in./mm)
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