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TAP800 Series
800 Watt Heat Sinkable Planar
Resistance Values
1Ω to 10KΩ
Resistance Tolerance
±5% to ±10%
Temperature Coefficient
±150ppm/°C (others upon request)
Maximum Working
Voltage
5,000V DC, higher voltage on request, not exceeding
max. power
Short Time Overload
1,200W at 70°C for 10sec., ∆R=0.4% max.
Power Rating
800W at 85°C Bottom case temperature.
Peak Current
up to 1500 amp. depending on pulse length and fre-
quency Please ask for details
Electric Strength Voltage
6kVrms, 50Hz,upto 12kVrms on special request
Single Shot Voltage
up to 12kV Normwave (1.5/50 µsec)
Partial Discharge
4KVrms, <10pC, up to 7kV on special request
Insulation Resistance
10GΩ min. at 500V
Creeping Distance
42mm min.
Air Distance
14mm min.
Inductance
80nH
Capacity/Mass
110pF
Capacity/Parallel
40pF
Operation Temperature
-55°C to +150°C
Max. Torque for
Contacts
2 Nm
Max. Torque for
Mounting
1.8 Nm M4 screws (not included)
Derating
9.09W/°K (0.11°K/W)
Power Rating
800W at 85°C bottom case temp. This value is only
valid by using a thermal conduction to the heatsink
Rth-cs<0.025°K/W. This value can be reached by
using thermal transfer compound with a heat conduc-
tivity 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.
Test
Method
Typical
Results
∆R
Short time
overload
1,000 W/10sec 0.4%
Humidity
Steady State
56 days/40°C/95% 0.25%
Temp. Cycling
-55/+125/5 cycles 0.20%
Shock
40g/4,000 times 0.25%
Vibration
2-500Hz/10g 0.25%
Load Life
Pn 30 min. on/30 min
off, 1,000cyl
0.40%
Terminal
Strength
200N 0.05%
Derating
Rated Power, %
Bottom of base plate Temperature, °C
0255075 100 125 150 175
40
0
60
80
120
20
100
Rated power, watts
320
0
480
640
960
160
800
Ohmite’s TAP800 Series dissipates 800 watts of
power when used with a liquid or air cooled heat
sink system. The Ohmite CP4 (http://www.ohmite.
com/cat/sink_cp4.pdf) is an example of properly
designed heat sink. The TAP800 rounds out 600
watt (TAP600) and 1000 watt (TAP1000) prod-
uct offerings. Applications include variable speed
drives, power supplies, robotics, motor control, con-
trol devices, and other power designs.
FEATURES
• Electric support is high alumina content ceramic
metallized on the bottom for ideal heat transfer and
optimum discharge.
• Encapsulated with a special resin filled epoxy cas-
ing with a large creepage distance to mass, large
air distance between terminals, and a high insula-
tion resistance (CTI 600).
• Resistive element is specially designed for low
inductance and capacitance. The element provides
stable performance in addition to high wattage and
pulse loading capability.
• Contacts allow for easy load connecting with M4 or
M5 screws (not included).
• Materials meet the requirements of UL94-V0
CHARACTERISTICS
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