T93
Vishay Sfernice 3/8" Square Multi-Turn Cermet Trimmers
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 51026
74 See also: Application notes Revision: 25-Apr-06
ELECTRICAL SPECIFICATIONS
Resistive Element cermet
Electrical Travel 21 turns ± 2
Resistance Range 10 Ω to 2.2 MΩ
Standard series E3 1 - 2.2 - 4.7 and on request 1 - 2 - 5
Tolerance Standard ± 10 %
On Request ± 5 %
Power Rating Linear 0.5 W at + 70 °C
Logarithmic not applicable
Temperature Coefficient See Standard Resistance Element Table
Limiting Element Voltage (Linear Law) 250 V
Contact Resistance Variation 2 % Rn or 2 Ω
End Resistance (Typical) 1 Ω
Dielectric Strength (RMS) 1000 V
Insulation Resistance (500 VDC) 106 MΩ
MECHANICAL SPECIFICATIONS
Mechanical Travel 23 turns ± 5
Operating Torque (max. Ncm) 1.5
End Stop Torque clutch action
Net Weight Approx. 0.82 g
Wiper (actual travel)
Positioned at approx.
50 %
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C to + 155 °C
Climatic Category 55/125/56
Sealing fully sealed
container IP67
POWER RATING CHART
050 100 155
0.5
0
AMBIENT TEMPERATURE IN DEGREES CELSIUS
POWER IN WATT
70 125
25
PERFORMANCE
TESTS CONDITIONS
TYPICAL VALUES AND DRIFTS
ΔRT
RT (%) ΔR1-2
R1-2 (%)
Load Life 1000 hours at rated power
90’/30’ - ambient temp. 70 °C
± 1 % ± 2 %
Contact res. variation: < 1 % Rn
Climatic Sequence
Phase A dry heat 125 °C - 30 % Pr
Phase B damp heat
Phase C cold - 55 °C
Phase D damp heat 5 cycles
± 0.5 % ± 1 %
Long Term Damp Heat 56 days
40 °C, 93 % RH
± 0.5 % ± 1 %
Dielectric strength: 1000 V RMS
Insulation resistance: > 104 MΩ
Rapid Temperature Change 5 cycles
- 55 °C at + 125 °C ± 0.5 % ΔV1-2
V1-3
≤ ± 1 %
Shock
50 g at 11 m secs
3 successive shocks
in 3 directions
± 0.1 % ± 0.2 %
Vibration
10 - 55 Hz
0.75 mm or 10 g
during 6 hours
± 0.1 % ΔV1-2
V1-3
≤ ± 0.2 %
Rotational Life 200 cycles ± 4 %
Contact res. variation: < 1 % Rn