Accutrim? 1280G, 1285G
Vishay Foil Resistors
TABLE 3 - 1280G AND 1285G SERIES MECHANICAL SPECIFICATIONS
Adjustment Turns
Backlash
Stops
Sealed
Torque
Weight
Construction
Case Material
Lead Screw
Wiper
Rider Block
Element
Lead Material
26 ± 2 turns
< 0.05 %
clutch, wiper idles
+ 85 °C water immersion
5 oz. in. maximum
1.5 grams maximum
Valox ?
Brass
Precious metal brush
Nylon
Bulk Metal ? Foil
Gold plated phosphor bronze
FIGURE 1 - 1280G/1285G SCHEMATIC AND DIMENSIONS in Inches (Millimeters)
0.060"
0.190"
0.750" (19.05 mm) C
(1.52 mm) A
0.110"
(4. 8 3 mm) B
0.030"
0.010"
(2.79 mm) A
0.190"
(4. 8 3 mm) B
0.270"
(6. 8 6 mm) B
(0.76 mm) A
(0.25 mm) A
0.050"
(1.27 mm) A
1
2
3
0.200"
(5.0 8 mm) B
0.010"
(0.25 mm) A
0.039" (0.99 mm) A
0.020" (0.51 mm) A
0.200"
(5.0 8 mm) A
0.500" (12.70 mm) A
0.125"
(3.1 8 mm) B
1
0.100"
(2.54 mm) B
3
C W
2
0.030"
(0.76 mm) A
TOLERANCES:
A = ± 0.005" (0.13 mm)
B = ± 0.010" (0.25 mm)
C = ± 0.015" (0.38 mm)
FIGURE 2 - POWER DERATING CURVE
+ 100
+ 75
+ 50
+ 25
0
- 55 °C
+ 25 °C
- 75
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
+ 150
Ambient Temperature (°C)
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2
For any questions, contact: foil@vishaypg.com
Document Number: 63056
Revision: 25-Mar-10
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