Data Sheet

POWER - NIKKOHM
RPM250, RPM300
CHASSIS MOUNTING NON-INDUCTIVE HIGH POWER RESISTORS
Ordering Information
Type
Terminal
Connection
Terminal Screws
Option
Resistance Tolerance RoHS
RPM300 Z S 101 (*) J Z00
| | | | | |
RPM250 X -(w/o screws) +E12 J (5%) Z00
RPM300 Y S(w/ screws) R1=R2=R3 (RoHS)
Z M4-5mm only
(**)
(* ) When a network circuit configuration contains two resistors, ordering is RPM250X101JZ00.
(**) Terminal screws provide by showing screw option ‘S’ in ordering information, M4-5mmL only.
(***) When ordering of the optional 4KV insulation, please specify P/N as RPM300X4KV 101JZ00.
Specifications and Performances
RPM250 RPM300 Conditions
Rating Power 250 W 300W At flange temp. -55°C to +85°C
Configuration XYZ XYZ
Weight 30.0gr 30.0gr
Thermal Resistance. 0. 23°C /W 0.23 °C /W
Single or Dual Configuration More than one Same resistance, R1= R2= R3
Resistance Range 0.1 ohm to 1Mohm only single Z connection at 0.1-1.0Ω
Resistance E12+ Additionally, 2.5 and 5.0.
TCR +/-100 ppm/°C For -55 to +125 °C, typical, over10 ohm
Tolerance +/-5%(J) 1% option
Operation Temp. -55 - +155 °C At resistor element surface
Max. Voltage Less than
RPE 
or 1000V
Max. Current 100A
Insulation Voltage 2500 VAC / 4000VAC 60 seconds-1mA. 4KVAC optionally available
Capacitance between terminals 13.1pF typical
Inductance 13.7nH typical
Load Life +/-1.0 % 25°C , 90 min.ON, 30min.OFF, 1000h.
Humidity +/-1.0 % 40°C , 90 to 95%RH, DC0.1W, 1000h.
Tem. Cycle +/-1.0 % Note 1
Short Time Over Load Rated Power Note 2
Insulation Over 1000 Meg Ω Between terminals and flange.
Vibration +/-0.25 % Note 4
Flammability UL94V-0
Weight 30.0 grams
Note1: -55°C, 30 min.,+120 °C 30min., 20 cycles.
Note2: Several seconds overload can not be applied.
Note3: Torque: Terminal 1.0Nm max, 0.6Nm recommend. Mounting 1.6Nm max, 1.0Nm recommend.
Note 4: IEC60068-2-6, displacement 0.75mm or acceleration 100m/sec^2, 10Hz-54Hz sweep, 10 cycles X-Y-Z direction.
20151201
RoHS
Nikkohm Co., Ltd. 3-31-2640 Minamicho, Misawa, Aomori 033-0036 Japan TEL: [phone], FAX: [phone]
© Nikkohm Co., Ltd. All rights reserved. 2015. URL: http://www.nikkohm.co.jp & http://www.nikkohm.co.jp / e-mail: [e-mail]
Pulse Durability, RPM300
1n 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100
Pulse Width (seconds)
1000
100
10
1
0.1
Pulse Peak Power (kW)
300W
Limitation obtained by actual test with
0.01 duty continuous pulse repetition for
RPM300-10R0-J, four times safety factor
was considered. Please note this is not
a specification, this is a typical data.
Dotted line is in estimation.
Derating Curve,
RPM300
％ Rated Power
-50 0 50 100 150 200
Flan
g
e Tem
p
erature
(
°C
)
85 °C
100
80
60
40
20
0
155 °C
125 °C
Slope 0.23°C/W