mounting鈥僶n鈥僡鈥僪eatsink鈥僺ignificant鈥僣ost鈥僡dvantages鈥僣an鈥僢e鈥價eailzed鈥僨or鈥僷ower鈥傾ppliation鈥僨rom鈥?00w鈥僼o鈥?00w.鈥冣€?R-250鈥僣an鈥?/div>
be鈥僺upplied鈥僫n鈥僡鈥?-terminal鈥冣€冣€僊ain鈥僡pplications鈥僡re鈥僔ariable鈥僺peed鈥僁rives,鈥僺hip,鈥僼rain,鈥僐F鈥僒ermination,鈥働ower鈥僑upplies,鈥僀ontrol鈥?/div>
Devices,鈥僒elecom,鈥僐obotics,鈥僊otor鈥僀ontrols鈥僁ynamic鈥傿raking,鈥僡nd鈥僶ther鈥僺witching鈥僤esigns.
3R-250 Non-Inductive 250Watt
Mountable, High Frequency Resistors
路Heat Sink Mountable
with M4 Screw
路RF Terminal
路Shunt
路Inverter
路Moter Braking
路Pulse & Plasma
S
PECIFICATIONS
Resistance Values :
1R0 to 2Megohm others on
rquest
Resistance Tolerance :
鹵 10% Std. ,1%,2%,5%
available on request.
Temperature Coefficient :
鹵 100ppm/擄C typ.
(others upon request)
Maximum Working Voltage :
5,000V DC, higher
voltage on request, not execeeding max. power
Single Shot Voltage :
Up to 12kV at std. wave
(1.5/50
銕?
Insulation Resistance :
10G鈩?min. at 500V
Creeping Distance :
42mm min.
Inductance :鈮?0
nH
Capacity/Ground :
鈮?10pF
Capacity/Resistive :
鈮?0pF
Operation Temperature :
-55擄C to +155擄C
Max. Torque for Contacts :
2 N.m
Max. Torque for Mounting :
1.8 N.m
Power Rating :
250W at 50擄C Tap Temperature
Higher power :
600Watt at 5擄C Tap Temperature
Dielectric Strength :
Up to 12 kV
Termination to Contacts :
M5 Screws
Required thermal transfer compound of-heat
conductivity :
1 W/擄C
Required flatness of heat sink :
鈮?0.05mm
Roughness of the Heatsink surface :
鈮?6.4銕?
Isolation Voltage(Terminal to Heatsink) :
7k Vrms
cf.: The described specifications & dimensions subject to change without notice.
D
IEMENSION
D
ERATING CURVE
Rated Power or Voltage%
00
80
60
40
20
0
25
50
75
00
25
50
75
Tap Temperature (藲C)
鈥?/div>
鈥?/div>
Willow Technologies Ltd.
Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom.
info@willow.co.uk
http://www.willow.co.uk
+ 44 (0) 1342 835234
+ 44 (0) 1342 834306
1
