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TAP1000 and 2000 Series

The TAP series delivers 1000W or 2000W of continuous power when properly mounted to a liquid cooled heat sink (based on 85°C mounting plate temperature) Applications include power conditioning, power distribution, power conversion, and power control. Derating

FEATURES High Energy Rating Low Inductance Resistor Element Electrically Isolated High Dielectric Strength Small Footprint APPLICATIONS Power semiconductor balancing Motor control Inrush Current Limiting SPECIFICATIONS Material Resistor Element: Thick Film on Alumina Substrate Electrical Power Rating: 1000W or 2000W at 85°C mounting plate Resistance Values: 0.5Ω to 1000Ω Resistance Tolerance: +10% std. Max Operating Voltage: 2000VDC Temperature Coefficient: ± 250 PPM/°C Dielectric Strength: 6KV standard Operating Temperature Range: -55°C to 85°C Case 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)

Test	Rating
	Continuous	Pulse
Rated Power, max. current and heat sink plate temperature limited	(TA1K0) 1000W (TA2K0) 2000W
Operating Voltage		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) 10Ω (TA2K0) 20Ω
Test	Method	Maximum ΔR
Short Time Overload	1.14 x / 10 sec @ 70°C	Max % ΔRsto = ±(2% +0.05Ω)
Moisture Resistance	(TA1K0) 1000 hrs @ 40°C, 90-95% RH (TA2K0) 1750 hrs @ 40°C, 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%
Pulse Tolerance, 20,000 Pulses	52µF @ 2KV / 60 sec intervals, 104J	≤1%
Dielectric Strength	6KVDC for 1 minute	≤1%

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 technique 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 85°C. This can only be achieved if the thermal conduction to the heatsink Rth-cs<0.025°K/W. This value can be reached by using thermal transfer compound 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 6.4µm.
• 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 Hydroblok, a 4 pass aluminum heat sink (http://www.ohmite.com/ta1k0-sink.html) is an example of properly designed heat sink.

STANDARD PART NUMBERS

	1000 Watt	2000 Watt
Ohms	10% Tolerance	10% Tolerance
0.5	TA1K0PHR500KE	TA2K0PHR500KE
1	TA1K0PH1R00KE	TA2K0PH1R00KE
2.5	TA1K0PH2R50KE	TA2K0PH2R50KE
5	TA1K0PH5R00KE	TA2K0PH5R00KE
7.5	TA1K0PH7R50KE	TA2K0PH7R50KE
10	TA1K0PH10R0KE	TA2K0PH10R0KE
15	TA1K0PH15R0KE	TA2K0PH15R0KE
25	TA1K0PH25R0KE	TA2K0PH25R0KE
50	TA1K0PH50R0KE	TA2K0PH50R0KE
100	TA1K0PH100RKE	TA2K0PH100RKE
250	TA1K0PH250RKE	TA2K0PH250RKE
500	TA1K0PH500RKE	TA2K0PH500RKE
750	TA1K0PH750RKE	TA2K0PH750RKE
1000	TA1K0PH1K00KE	TA2K0PH1K00KE