RF
Series, High Frequency Power Resistors
Thick film,Non-Inductive
RF and Frequency Powers,in water forced ,in Oil,in Air
Willow offers the RF series to meet general set of requirements NON-INDUCTIVE high frequency,
satisfy with an high power and Non-inductive specification at Economic Price.
Series RF Precision Power Resistor, Non-Inductive
High Frequency
Non Inductive Performence
Full power and various ohmic ratings
* Resistance tolerances offered from 1.0% to
10%
* Load Life Stability of 0.5% per 1000hours.
* Various Models of Resistance Value up to
Megohms available.
* Build up High Power RF Termination System
:10kW,50kW,300kW System in oil or water
forced, required tank & chiller System.
Model Nr.
RF07
RF2
RF3
RF5
RF50
RF100
RF150
RF200
Wattage
0.7
2.0
3.0
5.0
50
100
150
200
Resistance
[ ohm ]
Min. Max.
20R 2M
20R 2M
20R 2M
20R 2M
20R 2M
20R 2M
20R 2M
20R 2M
A
15(.59)
Dimensions in millimeters
(inches)
B
5.0(.196)
8.0+/-1.0 (.314)
8.0+/-1.0 (.314)
8.0+/-1.0 (.314)
33+/-1
(1.29)
33+/-1
(1.29)
33+/-1
(1.29)
42+/-1
(1.65)
Melf Type
C
0.8
1.00
1.00
1.00
N/A
Available
Available
Available
N/A
N/A
N/A
N/A
24.0+/-1.5
(.944)
39.0+/-1.5
(1.535)
52.0+/-1.5
(2.047)
110+/-1.5
(4.33)
210+/-1.5
(8.50)
310+/-1.5
(12.2)
310+/-1.5
(12.2)
M6 tab axial
M6 tab axial
M6 tab axial
M6 tab axial
RF
Series, High Frequency Power Resistors
Thick film,Non-Inductive
D
IMENSIONS [mm]
35 ± 5
A
B
C
S
PECIFICATIONS
Resistance Tolerance :
1%,2%,5%,10%
Temperature Coefficient :
Std. 100ppm/ °C, referenced to 25°C, from
-15°C to +105°C, other TCR available upon
requests.
Overload :
5times rated power with applied voltage
not to exceed 1.5times Max. continuous
operating voltage for 5seconds,overload/
overvoltage
ΔR
0.50% typ.
Thermal Shock :
Mil-Std-202, Method- 107,Cond. C,
ΔR
0.50%
max.
Load Life :
1.000 hours at rated power
ΔR
0.5% at DC
AC.
ΔR
3.0% at repetivepulse energy
D
ERATING CURVE
Rated Power or Voltage%
00
80
60
40
0
0
5
75
5
75
5
75
Ambient-Temperature (˚C)
Moisture Resistance:
Mil-Std-202, Method 106,
ΔR
0.50% max.
Lead Material : RF07 ~RF5 ;
Tinned copper solderable wire
Insulation Resistance :
10,000Megohms Min.
Termination Cap of Material :
RF07~RF5 ; Tinned Cap & Wire
RF50~RF200; AL alloy Cap M6.
Encapsulation :
High frequency silicone conformal, Glass
A
PPLICATION GUIDE ; RF SERIES
• RF Termination
• RF Dummy Load
• Wave Form Load
• High Frequency
• Charging/Discharging
• AVR ,UPS
• Current dividing
• Elevators control
• Electrical Trains
• Experimentals
• High Frequency Circuits
• Inverters
• Power Braking
• Military
• Hoist Cranes
• Motor Dynamic Braking
• Industrial Vehicles
• Power Supply
• Medical Equipments
• Server Drivers
• Power Loaders
• Snubbers
• Telecomm Equipments
• Shunt
• Testing Equipments
• Inrrush Current Limiters
• Preloads
• Dummy Loads
• Rectifier
• Soft Start
• EMI Suppresions
cf.: The described specifications & dimensions subject to change without notice.
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
designed by jonaldo , France
