TAP1000 & 2000
1000 & 2000 Watt Heat Sinkable Planar
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-
ture)
Applications include
power conditioning, power
distribution, power conver-
sion, and power control.
F e AT u r e s
A P P l i c AT i o n s
• High Energy Rating
• Low Inductance
• Resistor Element Electrically Isolated
• High Dielectric Strength
• Small Footprint
chArAcTerisTics
• Power semiconductor balancing
• Motor control
• Inrush Current Limiting
Resistor Element
Thick Film on Alumina
Substrate
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
-55°C to 85°C
Range
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
(TA1K0) 1000W
temperature limited
(TA2K0) 2000W
Operating Voltage
√P*R
Max. Applied Voltage, ohms law limited
223V
Max. Current
10A
Critical Resistance; below this resistance max
(TA1K0) 10Ω
power has to be de-rated due to exceeding max
(TA2K0) 20Ω
current
Test
Method
Short Time
1.14 x √P*R / 10 sec @ 70°C
Overload
Moisture
(TA1K0) 1000 hrs @ 40°C, 90-95% RH
Resistance
(TA2K0) 1750 hrs @ 40°C, 90-95% RH
Thermal Shock
MIL-STD-202, Method 107
Vibration, elec.
MIL-STD-202, Method 201
Vibration, mech.
MIL-STD-202, Method 201
Load Life
(TA1K0) 1000 Hrs 90 min ON / 30 min OFF
(TA2K0) 1750 Hrs 90 min ON / 30 min OFF
Pulse Tolerance
52µF @ 2KV / 60 sec intervals, 104J,
20,000 Pulses
Maximum ∆R
Max % ∆Rsto =
±(2% + 0.05Ω)
≤1%
≤1%
MIL-STD-202,
Method 107
±2% Resistance
No Loose
Terminal Screws
≤1%
≤1%
≤1%
≤1%
N/A
2000VDC
53.33A
Derating
100
Percent Rated Watts
80
60
40
20
0
0
25
50
85 100 125 150
Bottom of base plate Temperature,
°C
Dielectric
6KVDC for 1 minute
Strength
(continued)
144
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TAP1000 & 2000
1000 & 2000 Watt Heat Sinkable Planar
dimensions
A P P l i c AT i o n n o T e s
0.689"
(17.50mm)
(in./mm)
0.193"
(4.89mm)
ø0.172"
(4.37mm)
ø10-32
1.308"
(33.21mm)
3.000"
(76.20mm)
1.308"
(33.21mm)
1.622"
(41.20mm)
(same dimensions)
0.300"
(7.62mm)
0.450"
(11.43mm)
0.188"
(4.76mm)
0.798"
(20.26mm)
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 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 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 6.4µm.
• 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 Ohmite CP4
heat sink (http://www.ohmite.com/cat/sink_cp4.pdf) is an
example of properly designed heat sink.
o r d e r i n g i n F o r m AT i o n
RoHS Compliant
Standard Part Numbers
Ohms
0.5
1
2.5
5
7.5
1000 Watt
10% Tolerance
TA1K0PHR500KE
TA1K0PH1R00KE
TA1K0PH2R50KE
TA1K0PH5R00KE
TA1K0PH7R50KE
Ohms
0.5
1
2.5
5
7.5
2000 Watt
10% Tolerance
TA2K0PHR500KE
TA2K0PH1R00KE
TA2K0PH2R50KE
TA2K0PH5R00KE
TA2K0PH7R50KE
TA 1 K 0 P H 2 R 5 0 K E
Style
Wattage Package Resistance Tolerance
Type
2.5Ω = 2R50 K = 10% (standard)
50Ω = 50R0 L = 20%
250
500
750
1000
10
15
25
50
100
TA1K0PH10R0KE
TA1K0PH15R0KE
TA1K0PH25R0KE
TA1K0PH50R0KE
TA1K0PH100RKE
TA1K0PH250RKE
TA1K0PH500RKE
TA1K0PH750RKE
TA1K0PH1K00KE
250
500
750
1000
10
15
25
50
100
TA2K0PH10R0KE
TA2K0PH15R0KE
TA2K0PH25R0KE
TA2K0PH50R0KE
TA2K0PH100RKE
TA2K0PH250RKE
TA2K0PH500RKE
TA2K0PH750RKE
TA2K0PH1K00KE
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
145
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