The TAP series delivers
1000W or 2000W of con-
tinuous power when properly
mounted to a liquid cooled
heat sink (based on 85°C
mounting plate temperature)
Applications include power
conditioning, power distribu-
tion, power conversion, and
power control.
S P ꢀ c ꢅ F ꢅ c ꢁ ꢂ ꢅ o ꢆ S
Material
Resistor Element: Thick Film on
Alumina Substrate
TAP1000 and 2000
Heat Sinkable Planar
1000 & 2000 Watt
Electrical
Power Rating: 1000W or 2000W
at 85°C mounting plate
Resistance Values:
0.193"
(4.89mm)
0.689"
(17.50mm)
ø0.172"
(4.37mm)
ø10-32
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
F ꢀ ꢁ ꢂ u ꢃ ꢀ S
• High Energy Rating
• Low Inductance
• Resistor Element Electrically
Isolated
1.308"
(33.21mm)
1.622"
(41.20mm)
3.000"
(76.20mm)
• High Dielectric Strength
• Small Footprint
1.308"
(33.21mm)
ꢁ P P ꢄ ꢅ c ꢁ ꢂ ꢅ o ꢆ S
Case
• Power semiconductor balancing
• Motor control
• Inrush Current Limiting
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)
(same dimensions)
D ꢀ ꢃ ꢁ ꢂ ꢅ ꢆ g c u ꢃ v ꢀ
0.300"
(7.62mm)
0.450"
(11.43mm)
100
80
60
40
20
0
0.798"
(20.26mm)
0.188"
(4.76mm)
p e r f o r m a n c e d ata
0
25
50
85 100 125 150
ꢂest
ꢃatinꢇ
cꢈntinꢉꢈꢉs
Bottom of base plate Temperature, °C
Pꢉlse
Rated Power, max. current and
heat sink plate temperature limited
(TA1K0) 1000W
(TA2K0) 2000W
ꢁ P P ꢄ ꢅ c ꢁ ꢂ ꢅ o ꢆ ꢆ o ꢂ ꢀ S
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.
Operating Voltage
Max. Applied Voltage, ohms law limited
Max. Current
Critical Resistance; below this resistance max power
has to be de-rated due to exceeding max current
√P*R
223V
10A
N/A
2000VDC
53.33A
(TA1K0) 10Ω
(TA2K0) 20Ω
ꢂest
Methꢈd
Maximꢉm ∆ꢃ
• 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 con-
duction 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 rec-
ommended 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 alumi-
num heat sink (http://www.ohmite.com/ta1k0-sink.html) is an example
of properly designed heat sink.
Short Time Overload
Moisture Resistance (TA1K0) 1000 hrs @ 40°C, 90-95% RH
(TA2K0) 1750 hrs @ 40°C, 90-95% RH
1.14 x √P*R / 10 sec @ 70°C
Max % ∆Rsto = (2% + 0.05Ω)
≤1%
≤1%
Thermal Shock
Vibration, elec.
Vibration, mech.
Load Life
MIL-STD-202, Method 107
MIL-STD-202, Method 201
MIL-STD-202, Method 201
MIL-STD-202, Method 107
2% Resistance
No Loose Terminal Screws
(TA1K0) 1000 Hrs 90 min ON / 30 min OFF
(TA2K0) 1750 Hrs 90 min ON / 30 min OFF
≤1%
≤1%
≤1%
Pulse Tolerance
20,000 Pulses
Dielectric Strength
52µF @ 2KV / 60 sec intervals, 104J
6KVDC for 1 minute
≤1%
o r d e r i n G i n f o r m at i o n
S ta n d a r d p a r t n u m b e r S f o r ta p S e r i e S
1000 Watt
10% Tolerance
2000 Watt
10% Tolerance
RoHS Compliant
Ohms
Ohms
0.5
1
TA1K0PHR500KE
TA1K0PH1R00KE
TA1K0PH2R50KE
TA1K0PH5R00KE
TA1K0PH7R50KE
0.5
1
TA2K0PHR500KE
TA2K0PH1R00KE
TA2K0PH2R50KE
TA2K0PH5R00KE
TA2K0PH7R50KE
T A 1 K 0 P H 2 R 5 0 K E
2.5
5
2.5
5
Style Wattage Package Resistance Tolerance
Type
2.5Ω = 2R50 K = 10% (standard)
7.5
7.5
50Ω = 50R0 L = 20%
10
15
TA1K0PH10R0KE
TA1K0PH15R0KE
TA1K0PH25R0KE
TA1K0PH50R0KE
TA1K0PH100RKE
10
15
TA2K0PH10R0KE
TA2K0PH15R0KE
TA2K0PH25R0KE
TA2K0PH50R0KE
TA2K0PH100RKE
Check product availability at www.ꢈhmite.ꢊꢈm
25
25
50
100
50
100
250
500
750
TA1K0PH250RKE
TA1K0PH500RKE
TA1K0PH750RKE
TA1K0PH1K00KE
250
500
750
TA2K0PH250RKE
TA2K0PH500RKE
TA2K0PH750RKE
TA2K0PH1K00KE
1000
1000
Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
51
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