Open Air
Sense Resistors
OAR Series
Welwyn Components
•
•
•
•
1, 3 and 5 watts
±1% or ±5% tolerance
Resistance wire TCR ±20 ppm/°C
Resistance values down to 0R005 ohms
Electrical Data
OAR-1
Power rating at 85°C
Resistance range
* Contact factory for values below 0R005 ohms
OAR-3
3
0R005 to 0.10
OAR-5
5
0R005 to 0.05
watts
ohms
1
0R005* to 0.10
Physical Data
Dimensions (mm)
Type
OAR-1
OAR-3
OAR-5
A
11.43 +1.020/-0.508
15.24 +1.020/-0.50
20.32 +1.020/-0.50
B
5.08 ±2.54
25.4 max.
25.4 max.
C
3.18 ±0.762
3.18 ±0.762
3.18 ±0.762
E
1.65 +0.254/-0.127
1.65 +0.254/0.127
1.65 +0.254/-0.127
F
1.02 ±0.051
1.02 ±0.051
1.02 ±0.051
On lower ranges stand-off may be eliminated
B
C
NOTE:
Contact factory for:
1. Variations of ‘A’ dimension
2. Different lead diameter
A
F
Test Point (Kelvin connection)
E
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 D · 08.04
© 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
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WELWYN [ WELWYN COMPONENTS LIMITED ]
