1260_10 Datasheet, PDF (1/5 Pages) Vishay Siliconix – Bulk Metal® Foil Ultra High Technology Precision Trimming Potentiometers

Accutrim™ 1260 (RJ24 Style)
Vishay Foil Resistors
Bulk Metal^® Foil Ultra High Technology Precision Trimming Potentiometers,
3_{/8" Square, RJ24 Style, Designed to Meet or Exceed the Requirements of}
MIL-PRF-39035, Char. H with a Smooth and Unidirectional Output
INTRODUCTION
Vishay Foil precision trimmers have the Bulk Metal^® Foil
resistive element which possesses a unique inherent
temperature and load life stability. Plus, their advanced
virtually back lash-free adjustment mechanism makes them
easy to set quickly and accurately and keeps the setting
exactly on target.
FEATURES
• Temperature coefficient of resistance (TCR):
± 10 ppm/°C (- 55 °C to + 150 °C ref. at + 25 °C); through
the wiper ⁽²⁾; ± 25 ppm/°C (see table 2 for low values)
• A smooth and unidirectional resistance with leadscrew
adjustment
• Load life stability: 0.1 % typical ΔR, 1.0 % maximum ΔR
under full rated power at + 85 °C for 10 000 h
• Settability: 0.05 % typical; 0.1 % maximum
• Setting stability: 0.1 % typical; 0.5 % maximum
• Power rating: 0.25 W at + 85 °C
• Resistance range: 5 Ω to 10 kΩ
• Resistance tolerance: ± 5 %, ± 10 %
• “O”-ring prevents ingress of fluids during any board
cleaning operation
• Electrostatic discharge (ESD) up to 25 000 V
• Terminal finish: tin/lead
BULK METAL
FOIL
WIREWOUND
CERMET
Wiper Travel
Wiper Travel
Wiper Travel
TABLE 1 - MODEL SELECTION
MODEL
TERMINATION STYLE
1260
W-edge mount, top adjust
X-edge mount, side adjust
Note
• See figure 1
AVERAGE WEIGHT (g) POWER RATING at + 85 °C AMBIENT NO. OF TURNS
0.4
0.25 W
21 ± 2
TABLE 2 - 1260 (RJ24 STYLE) SERIES
ELECTRICAL SPECIFICATIONS
Temperature Coefficient of
Resistance (TCR) 50 Ω to 10 kΩ
End-to-end ⁽¹⁾
± 10 ppm/°C maximum
(- 55 °C to + 150 °C,
+ 25 °C ref.)
Temperature Coefficient of
Resistance (TCR) 5 Ω, 10 Ω and 20 Ω
Through the wiper ⁽²⁾
Stability
Load life at 10 000 h
Power Rating ⁽³⁾
± 20 ppm/°C
± 25 ppm/°C
0.1 % typical ΔR
1.0 % maximum ΔR
(under full rated power
of 0.25 W at + 85 °C)
0.25 W at + 85 °C
Settability
Setting Stability
Contact Resistance
Variation - CRV (noise)
Hop-off
0.05 % typical;
0.1 % maximum
0.1 % typical;
0.5 % maximum
3 Ω typical;
10 Ω maximum
0.25 % typical;
1.0 % maximum
High-Frequency Operation
Rise/decay time
Inductance
Capacitance
1 ns without ringing
0.08 µH typical
0.5 pF typical
Operating Temperature Range
- 55 °C to + 150 °C
TABLE 3 - VALUES VS. TOLERANCES
STANDARD RESISTANCE VALUES
(in Ω)
STANDARD
TOLERANCE
5, 10
± 10 %
20, 50, 100, 200, 500, 1K, 2K, 5K, 10K
±5%
TABLE 4 - MECHANICAL SPECIFICATIONS
Adjustment Turns
21 ± 2
Mechanical Stops
Wiper idles - no discontinuity
Internal Terminations All welded - no flux
Case Material
Diallyl-phthalate: black (DAP)
Shaft Torque
3 oz. in. maximum
Backlash
0.005 % typical
Document Number: 63054
Revision: 24-Mar-10
For any questions, contact: [e-mail]
www.foilresistors.com
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