Precision Non-Military
™
Metal Glaze Resistors
RG series
Welwyn Components
•
Excellent pulse handling
•
Carbon comp. alternative
•
1/8 watt to 3 watts
•
0.4 ohm to 5.1 megohms
•
0.5% to 5% tolerance; 0.1% in selected ranges
•
±25 ppm/°C to ±200 ppm/°C
Electrical Data
Power
MIL
Type
RG
1
/
8
1
RG
1
/
4
RG
1
/
2
TO-50
1
T2-50
1
Max.
Volt.
Rtg.
200
250
6
Nominal
Resistance
Range (Ω)
4R3 to 1M5
4R3 to 5M1
4R3 to 5M1
10R to 1M
10R to 1M
10R to1M
0R4, 9M9
0R4 to 9M9
0R4 to 9M9
0R4, 2M
0R4, 2M
0R4, 2M
0R4, 2M
1R to 2M
1R to 3M
4R3 to 5M1
4R3 to 5M1
10R to 3M01
10R to 3M01
10R to 3M01
10R to 3M01
10R to 3M01
10R to 3M01
Size
(watts)
0.125
0.25
0.5
0.125
0.125
0.125
0.125
0.25
0.5
0.25
0.25
0.5
0.5
3
3
0.25
0.5
0.25
0.25
0.25
0.5
0.5
0.5
Dimens.
Code
1
2
3
1
1
1
1
2
3
2
2
4
4
5
5
2
3
2
2
2
4
4
4
Tol
Marking
Band
Band
Band
Legend
Legend
Legend
Band/Legend
Band/Legend
Band/Legend
Legend
Legend
Legend
Legend
Legend
Legend
Band
Band
Band/Legend
Legend
Legend
Band/Legend
Legend
Legend
2
T.C.
(ppm/°C)
200
200
200
100
50
25
100
100
100
50
4
, 100
100
50
4
, 100
100
200
50
4
, 100
200
200
100
50
25
100
50
25
3
Rating
(watts @70°C)
0.25
0.5
1
0.25
0.125
0.125
0.25
0.5
1
0.5
0.5
0.75
0.75
2
3
2
3
0.5
1
0.5
0.25
0.25
0.75
0.5
0.5
4
5
6
5
Type
-
-
-
-
-
-
-
-
-
Flame Resist
2
Flame Resist
Flame Resist
2
Flame Resist
2
Flame Resist
2
Flame Resist
2
-
-
-
-
-
-
-
-
(±%)
2, 5
5
5
.5, 1
.5, 1
.5, 1
1, 2, 5
1, 2, 5
1, 2, 5
1
2, 5
1
2, 5
1, 2, 5
1, 2, 5
2, 5
2, 5
.1, .5, 1
3
.1, .5, 1
.1, .5, 1
3
.1, .5, 1
3
.1, .5, 1
3
350
200
200
200
200
250
250
250
250
350
350
750
1000
250
350
200
200
200
300
250
250
T9-50
1
TF-05
1
TF-07
TF-20
GF-55
GF-07
GF-60
GF-20
GF-3
GS-3
RG-07
RG-20
TO-55
T2-55
T9-55
T0-60
T2-60
T9-60
1
2
3
.1, .5, 1
3
Conformally coated construction on all
1
/
8
W nominal size resistors.
Contact factory for details on flame-resistant specifications.
Only available in F tolerance above 2M ohm.
Below 10 ohms only available in 100 ppm.
1 watt @ 70°C available - consult factory.
Contact factory for details on higher voltage rating.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue C · 04.03
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
184
Precision Non-Military
Metal Glaze
™
Resistors
RG series
Welwyn Components
Performance Data
RG ‘To’ Film Temp. Rise
120
Temperature (
o
C)
100
RG 1/8W
TO-60
*
RG20, RLR20
**
RG07, TO-55
GS-3 Surface Temp. Rise
% Of Commercial Rated Power
Commercial Power Derating
(in many cases, 2X MIL Spec. power rating)
200
Temperature (
o
C)
150
100
50
0
100
RG1/8, RG1/4, RG07,
80
60
40
20
0
70
RG20, TF07, TF20
80
60
40
20
0
0
0.2 0.4 0.6 0.8 1.0
Applied Power (watts)
1.2
TO/T2
55 & 60
0
25
50
75
% Of Power Rating
100
125
150
175
o
C)
Ambient Temperature(
RG Series Surge Capability for Repetitive Surges
1,000
Peak Power (Watts)
RG 1/4 High-frequency Characteristics
% of DC Resistance
50‰
RG-1/2W
100
RG-1/4W
GS-OW
100
2K‰
10K‰
10
RG-1/8W
50
20
100K‰
1
1.OE.04
1.OE.03
1.OE.02
1.OE.01
1.OE.00
1
10
100
1000
Surge or Pulse Duration (seconds)
Frequency (MHz)
Note: Use for repetitive pulses where the average power dissipation is not to
exceed the component rating at 70°C.
Surge handling capacity for low-repetitive surges may be significantly greater
than shown above. Contact factory for recommendations
Performance Data
Dimensions (mm)
Dim
Code
1
2
3
4
5
Nominal
Size (watts)
0.125
0.25
0.5
0.5
3
Body Length
BL
3.8±0.3
6.4±0.4
9.9±0.3
9.9±0.3
13.1±0.3
Body Dia.
BD
1.7±0.2
2.3±0.2
3.6±0.2
3.6±0.2
5.7±0.2
Lead Length
LL
25.4±3.2
38.1±3.2
38.1±3.2
38.1±3.2
38.1±3.2
Lead Dia.
LD
0.41±0.05
0.64±0.05
0.81±0.05
0.64±0.05
0.81±0.05
Clean
Lead
5.7
7.9
11.4
11.4
14.6
BD
LD
BL
LL
Packaging
Resistors are supplied taped and reeled.
Bulk packaging available upon request.
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue C · 04.03
185
Precision Non-Military
Metal Glaze
™
Resistors
RG series
Welwyn Components
Ordering Procedure
Example: RG1/4 at 100 ohms and 5% tolerance packed on a reel of 5000 pieces -
RG1/4
–
100RJ
I
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
B
D
0.1%
0.5%
F
G
1%
2%
J
5%
Note: Check Electrical Data for available
tolerances for each type.
Packing
I
Tape
Dimension codes 1 & 2
Dimension code 3
5000/reel
3500/reel
Standard
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue C · 04.03
185
