RF SOLUTIONS - WILLOW TECHNOLOGIES LTD
Lead Free
FLANGED POWER RESISTORS
RFRF
Features and Applications
RF and microwave resistors of 50 to 800ohm have flange cooling, also applicable for terminations in
strip-line circuits.
Long life and temperature stability are a result of Ni-Cr thin film and super heat conductive ceramic
substrates.
Industrial RF power sources, RF amplifiers, radio transmitters, fixed transmitter of mobile systems, and
measurements.
Dimensions (mm)
G(2.9)
J
G(2.9)
J
G(3.2)
J
G(3.2)
J
B(5.1)
B(5.7)
B(6.35)
H C
K
H C
K
F
E
D
A(7.1)
K
H C
E
D
A(13.08)
RFRF40
J
J
H C
F
D
A(20.3)
RFRF120
RFRF100
J
G(3.2)
B(6.35)
K
H C
F
D
A(20.3)
RFRF50
G(3.2)
K
F
D
A(20.3)
F
RFRF10
B(5.7)
G(3.2)
B(9.53)
K
H C
B(9.53)
K
F
D
A(24.8)
H C
F
D
A(24.8)
RFRF150
RFRF250
All lead length: 6.35mm and lead thickness: 0.1mm.
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. sales@willow.co.uk
RF SOLUTIONS - WILLOW TECHNOLOGIES LTD
Lead Free
FLANGED POWER RESISTORS
RFRF
Dimensions (mm)
Type
RFRF10
RFRF40*
RFRF50
RFRF100
RFRF120*
RFRF150*
RFRF250
A
7.6
13.0
20.3
20.3
20.3
20.3
25.0
B
5.10
6.35
5.70
5.70
6.35
5.70
9.53
C
3.1
3.1
3.1
3.1
3.1
3.1
4.6
D
5.0
9.9
14.2
14.2
14.2
14.2
18.42
E
3.0
-
F
3.0
6.8
8.5
6.3
8.9
8.5
9.6
G
2.9
2.9
3.2
3.2
3.2
3.2
3.2
H
1.5
1.5
1.5
1.5
1.5
1.5
3.0
J
0.8
0.8
1.5
1.5
0.8
1.5
3.0
K
2.2
2.2
2.6
2.6
2.2
2.6
4.1
Ordering Information
P/N
RFRF10C50ohmF000
RFRF40C100ohmF000
RFRF50C50ohmF000
RFRF100C100ohmF000
RFRF120C100ohmF000
RFRF150C50ohmF000
RFRF250C100ohmF000
Type
RFRF
RFRF
RFRF
RFRF
RFRF
RFRF
RFRF
Rating Power
10W
40W
50W
100W
120W
150W
250W
TCR
C (50ppm/K)
C (50ppm/K)
C (50ppm/K)
C (50ppm/K)
C (50ppm/K)
C (50ppm/K)
C (50ppm/K)
Resistance
50 ohm
100 ohm
50 ohm
100 ohm
100 ohm
50 ohm
100 ohm
Tolerance
F (+/-1%)
F (+/-1%)
F (+/-1%)
F (+/-1%)
F (+/-1%)
F (+/-1%)
F (+/-1%)
Package
000(Tray)
000(Tray)
000(Tray)
000(Tray)
000(Tray)
000(Tray)
000(Tray)
Specifications and Performances
Type, Note(2)
Rating Power
Return Loss
Capacitance
Rating Temp.
Max. Voltage
Resistance
TC
Tolerance
Frequency
Short Time OL
Operating Temp.
Storage Temp.
RFRF10
10W
<1.1
<0.8pF
RFRF40
40W
<1.2
<0.8pF
RFRF50
50W
<1.2
<1.0pF
RFRF100
RFRF120
RFRF150
100W
120W
150W
<1.2
<1.2
<1.2
<1.0pF
<1.0pF
<1.0pF
25C
E = P ⋅ R , where P is rating power, R is resistance
50ohm, 100ohm, 150ohm, 200ohm
+/-50ppm/K(C)
+/-1% (F) standard, +/-2% and +/-5% are available.
DC to 3GHz
5 times rating power within 5 seconds
-55C to +155C
-55C to +155C
RFRF250
250W
<1.2
<1.0pF
Note(1) Other resistance will be available, please call factory.
Note(2) Old flange RF resistor, RFC series will be discontinued.
Derating Curve
Installation
% Rating Power
100
80
60
40
20
155
0
-50 –25 0 25 50 75 100 125 150 175 200
Flange Temperature (℃)
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. sales@willow.co.uk
RF SOLUTIONS - WILLOW TECHNOLOGIES LTD
Lead Free
FLANGED POWER RESISTORS
RFRF
Thermal and Rf Characteristics (Typical)
Temperature Rise, RFRF50C100ohmF
S11 Characteristics, RFRF150C100ohmF
Temperature Rise (C)
100
75
Resistive Film Surface Temp.
50
Flange Temp.
25
0
0
10
20
30
40
50
Applied Power (W)
60
70
Temperature Rise, RFRF150C100ohmF
S21 Characteristics, RFRF150C100ohmF
Temperature Rise (C)
200
150
Resistive Film Surface Temp.
100
50
Flange Temp.
0
0
25
50
75
100 125
Applied Power (W)
150
Temperature Rise, RFRF250C100ohmF
175
S22 Characteristics, RFRF150C100ohmF
Temperature Rise (C)
200
Resistive Film Surface Temp.
150
100
Flange Temp.
50
0
0
50
100
150 200 250
Applied Power (W)
300
20050212
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. sales@willow.co.uk