Pb Free

POWER-NIKKOHM

RoHS 2900W
CHASSIS MOUNTING NON-INDUCTIVE
HIGH POWER RESISTORS,WATER COOLING

RPK900L

Features and Applications
Small size SOT227, 900W high power resistor. Attaching with a large forced air-cooled heat sink orliquid-cooling would be necessary for high power operation.
Rated power is 900W with 10kV - 50Hz insulation voltage and 7kV - 50kHz corona discharge.
M4 screw terminals, very low series inductance and capacitance.
Higher density packing, vibration-proof and perfect heat dissipation are available.
Applications include charge / discharge resistors, voltage divider of the high voltage pulse source forX-ray CT, MRI, EUV Laser and etc.

Dimensions and Materials

GF BCHABCDEFGHEDA(mm)
38+/-0.5
25+/-0.5
12+/-0.5
30+/-0.2
15+/-0.5
13+/-0.5
2 – 4.20+/-0.1 dia.
250+/-10

Case
FillingResistor, Ni-Cr
Terminals AWG18Conductor
ALN substrate
Cu flange, Ni plated(inch)
1.50+/-0.02
0.98+/-0.02
0.47+/-0.02
1.18+/-0.008
0.59+/-0.02
0.51+/-0.02
2 - 0.165+/-0.004 dia.
9.8+/-0.4

Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd.
URL: http://www.nikkohm.co.jp & http://www.nikkohm.com / e-mail: info@nikkohm.co.jp

Pb Free

POWER-NIKKOHM

RoHS 2900W
CHASSIS MOUNTING NON-INDUCTIVE HIGH POWER RESISTORSRPK900L

Ordering Information
RPK900L|
RPK900L

C|C (50ppm)

101
|
+E24

J
|
J (5%)

Resistance value is available following modified E24, +E24. Another is available optionally.
1.0
1.11.2
1.3
1.5
1.6
1.8
2.0
2.2
2.4
3.6
3.9
4.0
4.3
4.7
5.0
5.1
5.6
6.2
6.8

Z00
|Z00
(RoHS)
box
2.5
7.5

2.7
8.0

3.0
8.2

3.3
9.1

Specifications and Performances
Specification Items
Rating Power
Thermal ResistanceResistance Range
Nominal Resistance
TCRTolerance
Operation Temp. Range
Limiting Voltage
Withstanding Voltage
Partial discharge
CapacitanceInductanceLoad Life
Humidity

RPK900L
900 Watts
0.10 °C/W
10 ohm to 1K ohm Single
Modified E24+/- 50 ppm/°C (C)+/-5% (J)-55 - +155 °CEither less than 1000V or E = P ⋅ R
10,000 VAC
7,000 V - 50kHz
13.1 pF
13.7 nH+/-(1.0 %+0.05 ohm)+/-(1.0 %+0.05 ohm)

Temperature Cycle+/-(1.0 %+0.05 ohm)

Short Time Overload
Insulation ResistanceVibration
Weight+/-(5.0 %+0.05 ohm)
Over 1000 meg ohm+/-(0.25 %+0.05 ohm)
38 grams

Any value, option
For -55 to +155 °C
available +/- 1% (F) option

60 seconds - 0.5mA - 50Hz
Starting voltage, typical
Parallel capacitance at 10MHz, short wire leads
Series inductance at 10MHz, short wire leads
25°C, 90min.ON, 30min.OFF, 1000hours.
70°C, 90 to 95%RH, DC0.1W, 1000hours.
-55°C, 30 min.,+125°C 30min., 20cycles. (-55°C, 30min.,+120°C, 30min., 5 cycles.)Rating watt×1.5, 5seconds, with heat sink.
Between terminals and flange.
Without wire terminals

Temperature Rise, RPK900L, Typical

Derating Curve, RPK900

Resistor temperature °C
160％Rated Power
120Conditions
At flange temperature -55 to +25 °C
Between resistor to flange

140+25 °C

10012080

10080606040+155 °C

200Resistor temperature40Flange temperature

200-500+50+100 +150 +200
Flange Temperature (°C)

0200400 600 800 1000 1200
Application Power (W)Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd.
URL: http://www.nikkohm.co.jp & http://www.nikkohm.com / e-mail: info@nikkohm.co.jp

Pb Free

POWER-NIKKOHM

RoHS 2900W
CHASSIS MOUNTING NON-INDUCTIVE HIGH POWER RESISTORSRPK900L
Pulse Operation

Test Method
DUT
RPK900L-50ohmF

10,0001,000

Dotted: assumptionPulse peak power (kW)1001010.10.01
10ns 100ns 1us 10us 100us 1ms 10ms 100ms 1s
Pulse width (duty 0.01)

10s 100s

Above drawing shows allowable pulse peak power that obtained by actual breaking test of RPK900L-10ohm-J, and shows the result of
double safety factor. The test was performed by observation of small resistance change after application of continuous pulse, that isrectangular waveform and 0.01 duty.
Since the pulse durability is moved by the resistance, the pulse waveforms and type of pulse source, constant voltage source or current
source, please test carefully for long terms on actual electronics when operating the resistor by the pulse of the peak power exceeding ratedpower.

Typical High speed pulse power generator and water cooling resistor, RPK900L

RPK900L

RPK900L

Typical High speed pulse power generator and water cooling resistor, RPK900L
20210301
Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: +81-176-53-2105, FAX: +81-176-53-2106© Nikkohm Co., Ltd.
URL: http://www.nikkohm.co.jp & http://www.nikkohm.com / e-mail: info@nikkohm.co.jp