Ohmite TAP800 Series Data Sheet
TAP800 Series
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
800 Watt Heat Sinkable Planar
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 casing with a large creepage distance to mass, large
air distance between terminals, and a high insulation 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
Resistance Values
Resistance Tolerance
Temperature Coefficient
Maximum Working
Voltage
Short Time Overload
Power Rating
Peak Current
Electric Strength Voltage
Single Shot Voltage
Partial Discharge
Insulation Resistance
Creeping Distance
Air Distance
Inductance
Capacity/Mass
Capacity/Parallel
Operation Temperature
Max. Torque for
Contacts
Max. Torque for
Mounting
140
Derating
Power Rating
Ohmite’s TAP800 Series dissipates 800 watts of
power when used with a liquid or air cooled heat
sink system. The Ohmite CP4 (https://www.ohmite.
com/cp4-series-chillplate/) is an example of properly designed heat sink. The TAP800 rounds out
600 watt (TAP600) and 1000 watt (TAP1000) product offerings. Applications include variable speed
drives, power supplies, robotics, motor control, control devices, and other power designs.
CHARACTERISTICS
1Ω to 10KΩ
±5% to ±10%
±150ppm/°C (others upon request)
5,000V DC, higher voltage on request, not exceeding
max. power
1,200W at 70°C for 10sec., ∆R=0.4% max.
800W at 85°C Bottom case temperature.
up to 1500 amp. depending on pulse length and frequency Please ask for details
7K Vrms, 50Hz, up to 12K Vrms on special request
up to 12kV Normwave (1.5/50 µsec)
4KVrms, <10pC, up to 7kV on special request
10GΩ min. at 500V
42mm min.
14mm min.
80nH
110pF
40pF
-55°C to +150°C
2 Nm
1.8 Nm M4 screws (not included)
9.09W/°K (0.11°K/W)
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 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.
Short time
overload
Humidity
Steady State
Temp. Cycling
Vibration
Load Life
Terminal
Strength
Derating
Test Method
1,000 W/10sec 0.4%
56 days/40°C/95% 0.25%
-55/+125/5 cycles 0.20%
Shock
40g/4,000 times 0.25%
2-500Hz/10g 0.25%
Pn 30 min. on/30 min
off, 1,000cyl
200N 0.05%
Typical
Results
∆R
0.40%
(continued)
TA P 800K5R0 E
Tolerance
J = 5%
K = 10%, Std.
L = 20%
Style
Resistance
1 Ohm = 1R0
10 Ohm = 10R
1000 Ohm = 1K0
Wattage
800 watts
RoHS compliant
Non-compliant version
unavailable
*C to C for
mounting holes
2.236-2.252"
(56.8-57.2mm)
LL
ø0.159–0.169"
(4.05–4.3mm)
0.689–0.728"
(17.5–18.5mm)
1.331–1.346"
(33.8–34.2mm)
1.409–1.425"
(35.8–36.2mm)
øM5
occ. Din
0.177–0.216"
(4.5–5.5mm)
0.177–0.216"
(4.5–5.5mm)
0.256-0.295"
(6.5-7.5mm)
*Dimensions are taken while part is
mounted to a proper heatsink
0.571–610"
(14.5–15.5mm)
*
2.56" ±0.031
(65mm ±0.8)
*2.244" ±0.02
(57mm ±0.5)
2.36" ±0.031
(60mm ±0.8)
1.26" ±0.02
(32mm ±0.5)
*
1.181" ±0.02
(30mm ±0.5)
*
TAP800 Series
1
10
100
1,000
10,000
0.001 0.01 0.1 1 10 100
Power (kW) or Energy (J)
Pulse duration (ms)
1000
Energy
Power
800 Watt Heat Sinkable Planar
PULSE ENERGY AND POWER CURVES
Typical rating for TAP800 with 2R and 10% tolerance
These energy values are reference values; depending on ohmic value and
used resistive paste, a variation in max. energy load capability is possible.
The power curve shows the max. possible power which can be applied
for a certain duration.
• Mounted with thermal compound
(0.9 W/mK) on a water-cooled
heatsink
• Constant inlet water temp.:
+50°C
• Test time: 10 min.
• Break time between pulses: 1sec.
Examples
• Change in ohm value: ≤0.1%
• Pulse shape: e-function
• Time between two pulses: 1 sec.
• Pulse length: time constant of 1
tau (1 means ... tau = 1ms)
Energy: At 1ms tau the TAP800
with 2R can withstand an energy
level of about 70J when the pulse
pause time is ≥1s
(in./mm)
At a symmetrical frequency >1kHz at pulse length
≥10μsec., the maximum applied pulse energy is a result
of the nominal power 800W divided by the operating
frequency (at 85°C bottom case) (E=800W/F)
ORDERING INFORMATIONDIMENSIONS
Standard Values
10% tol.
TAP800KR25E
TAP800KR33E
TAP800KR50E
TAP800K1R0E
TAP800K5R0E
TAP800K7R5E
TAP800K10RE
TAP800K15RE
TAP800K25RE
TAP800K50RE
TAP800K75RE
TAP800K100E
TAP800K220E
TAP800K300E
TAP800K390E
Power: For the time-constant of
1ms you can apply about 140kW
max. (Pp =2*E/T)
➔ when the time
between two such peaks is ≥1s
5% tol.
TAP800K680E
TAP800K750E
TAP800K1K0E
TAP800K2K7E
TAP800K5K0E
TAP800K7K5E
TAP800K10KE
TAP800J1R0E
TAP800J10RE
TAP800J50RE
TAP800J100E
TAP800J500E
TAP800J1K0E
141
Loading...