TA1K & TA2K High Wattage Heat Sinkable Planar Resistor The TAP series delivers 1000W or 2000W of contin- uous power when properly mounted to a liquid cooled heat sink (based on 85°C mounting plate tempera- FeATures ApplicATions ture) • High Energy Rating • Power semiconductor balancing Applications include power conditioning, power • Low Inductance • Motor control distribution, power conver- • Resistor Element Electrically Isolated • Inrush Current Limiting sion, and power control. • High Dielectric Strength • Small Footprint chArAcTerisTics Resistor Element Thick Film on Alumina Rating Substrate Test Continuous Pulse Power Rating 1000W or 2000W at Rated Power, max. current and heat sink plate (TA1K0) 1000W 85°C mounting plate temperature limited (TA2K0) 2000W Resistance Values 0.5Ω to 1000Ω Operating Voltage √P*R N/A Resistance Tolerance +10% std. Max. Applied Voltage, ohms law limited 223V 2000VDC Max Operating Voltage 2000VDC Max. Current 10A 53.33A Temperature Coefficient ± 250 PPM/°C Critical Resistance; below this resistance max (TA1K0) 10Ω Dielectric Strength 6KV standard power has to be de-rated due to exceeding max (TA2K0) 20Ω current Operating Temperature -55°C to 85°C Range Test Method Maximum ∆R Terminal Screws #10-32 Short Time 1.14 x √P*R / 10 sec @ 70°C Max % ∆Rsto = Max Contacts Torque 10 in-lb Overload ±(2% + 0.05Ω) Mounting Screws #8-32 Moisture (TA1K0) 1000 hrs @ 40°C, 90-95% RH ≤1% Resistance (TA2K0) 1750 hrs @ 40°C, 90-95% RH ≤1% Max Mounting Torque 15 in-lb Thermal Shock MIL-STD-202, Method 107 MIL-STD-202, Creepage Distance 50mm ± 1mm (min) Method 107 Vibration, elec. MIL-STD-202, Method 201 ±2% Resistance Derating Vibration, mech. MIL-STD-202, Method 201 No Loose 100 Terminal Screws Watts80 Load Life (TA1K0) 1000 Hrs 90 min ON / 30 min OFF ≤1% d 60 (TA2K0) 1750 Hrs 90 min ON / 30 min OFF ≤1% e at ent R40 Pulse Tolerance 5220µ,0F0 0@ P2uKlsVe /s 60 sec intervals, 104J, ≤1% c er20 P Dielectric 6KVDC for 1 minute ≤1% 00 25 50 85 100 125 150 Strength Bottom of base plate Temperature, °C (continued) 142 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

TA1K & TA2K High Wattage Heat Sinkable Planar Resistor dimensions ApplicATion noTes (in./mm) Proper heat sinking techniques are essential to performance of 0.193" ø0.172" 0.689" a TAP resistor. Pleased follow these guidelines when designing (4.89mm) (4.37mm) ø10-32 (17.50mm) TAP system: • Heats sink plate (base plate of the resistor) temperature must be monitored to establish proper de-rating. Best tech- 1.308" nique is to attach a thermocouple to the side of the base (33.21mm) plate of the resistor. Temperature of plastic housing or heat sink cannot be used to establish rating of the resistor. Usage 3.000" 1.622" of laser thermometers should be avoided. (76.20mm) (41.20mm) • To obtain a power rating of 1000W or 2000W, the bottom 1.308" case temp must not exceed 85°C. This can only be achieved (33.21mm) if the thermal conduction to the heatsink Rth-cs<0.025°K/W. This value can be reached by using thermal transfer com- pound with a heat conductivity of 1W/mK. The flatness of (same dimensions) the cooling plate must be better than 0.05mm overall. The roughness of the surface should not exceed 6.4µm. 0.300" (7.62mm) • Due to very high power density, only liquid cooled heat sinks 0.450" are recommended for applications when >300W power rating (11.43mm) is desired. 0.798" • Properly designed heat sink should have more than 2 cooling 0.188" (20.26mm) pipes under the surface of the TAP resistor. The Ohmite CP4 (4.76mm) heat sink (http://www.ohmite.com/cat/sink_cp4.pdf) is an example of properly designed heat sink. ordering inFormATion RoHS Compliant Standard Part Numbers Test Method Maximum ∆R TA 1 K 0 P H 2 R 5 0 KE 1000 Watt 2000 Watt Ohms 10% Tolerance Ohms 10% Tolerance Short Time 1.14 x √P*R / 10 sec @ 70°C Max % ∆Rsto = Overload ±(2% + 0.05Ω) Style Wattage Package Resistance Tolerance 0.5 TA1K0PHR500KE 0.5 TA2K0PHR500KE Type 2.5Ω = 2R50 K = 10% (standard) 1 TA1K0PH1R00KE 1 TA2K0PH1R00KE Moisture (TA1K0) 1000 hrs @ 40°C, 90-95% RH ≤1% 50Ω = 50R0 L = 20% 2.5 TA1K0PH2R50KE 2.5 TA2K0PH2R50KE 5 TA1K0PH5R00KE 5 TA2K0PH5R00KE Resistance (TA2K0) 1750 hrs @ 40°C, 90-95% RH ≤1% 7.5 TA1K0PH7R50KE 7.5 TA2K0PH7R50KE Thermal Shock MIL-STD-202, Method 107 MIL-STD-202, 10 TA1K0PH10R0KE 10 TA2K0PH10R0KE 15 TA1K0PH15R0KE 15 TA2K0PH15R0KE Method 107 25 TA1K0PH25R0KE 25 TA2K0PH25R0KE 50 TA1K0PH50R0KE 50 TA2K0PH50R0KE Vibration, elec. MIL-STD-202, Method 201 ±2% Resistance 100 TA1K0PH100RKE 100 TA2K0PH100RKE Vibration, mech. MIL-STD-202, Method 201 No Loose 250 TA1K0PH250RKE 250 TA2K0PH250RKE Terminal Screws 500 TA1K0PH500RKE 500 TA2K0PH500RKE 750 TA1K0PH750RKE 750 TA2K0PH750RKE Load Life (TA1K0) 1000 Hrs 90 min ON / 30 min OFF ≤1% 1000 TA1K0PH1K00KE 1000 TA2K0PH1K00KE (TA2K0) 1750 Hrs 90 min ON / 30 min OFF ≤1% Pulse Tolerance 52µF @ 2KV / 60 sec intervals, 104J, ≤1% 20,000 Pulses Dielectric 6KVDC for 1 minute ≤1% Strength rev 11/18-1 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 143