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PDF 1242 Data sheet ( Hoja de datos )
| Número de pieza | 1242 | |
| Descripción | Foil Technology Precision Trimming Potentiometers | |
| Fabricantes | Vishay Siliconix | |
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1242
Vishay Foil Resistors
Bulk Metal® Foil Technology
Precision Trimming Potentiometers, QPL Approved 1/4 Inch
Square, Qualified to MIL-PRF-22097, Char. F, RJ26
www.DataSheet4U.com
FEATURES
• Temperature coefficient of resistance (TCR):
± 10 ppm/°C maximum4) (- 55 °C to + 150 °C ref.
at + 25 °C); through the wiper5); ± 25 ppm/°C
• Load life stability: 0.1 % typical ΔR, 1.0 % maximum ΔR
under full rated power of 0.25 W at 85 °C for 1000 h
• Settability: 0.05 % typical; 0.1 % maximum
• Setting stability: 0.1 % typical; 0.5 % maximum, ΔSS
• Power rating: 0.25 W at + 85 °C
• Resistance range: 50 Ω to 5 kΩ
• Resistance tolerance: ± 10 %
• Terminal finish: gold plated
TABLE 1 - MODEL SELECTION*
MODEL
TERMINATION STYLE
AVERAGE
WEIGHT (g)
1242
(RJ26)
W-edge mount, top adjust
X-edge mount, side adjust
0.4
Note
* See figure 1
STANDARD RESISTANCE
VALUES (in Ω)1)
50, 100, 200, 500, 1K, 2K, 5K
STANDARD
TOLERANCE2)
± 10 %
POWER RATING
at + 85 °C AMBIENT
0.25 W
NO. OF
TURNS
21 ± 2
TABLE 2 - 1242 (RJ26) SERIES ELECTRICAL SPECIFICATIONS3)
Temperature Coefficient of Resistance (TCR)
End-to-end4)
Through the wiper5)
± 10 ppm/°C maximum (- 55 °C to + 150 °C, 25 °C ref.)
± 25 ppm/°C
Stability
Load life at 1000 h
Power Rating (at + 85 °C)6)
0.1 % typical ΔR
1.0 % maximum ΔR (under full rated power of 0.25 W at + 85 °C)
0.25 W
Settability
0.05 % typical; 0.1 % maximum
Setting Stability
Contact Resistance Variation - CRV (noise)
0.1 % typical; 0.5 % maximum ΔSS
± 3 % or 3 Ω7)
Hop-off
0.25 % typical; 1.0 % maximum
High-Frequency Operation
Rise time
Inductance
Capacitance
1.0 ns without ringing
0.08 µH typical
0.5 pF typical
Operating Temperature Range
- 55 °C to + 150 °C
Note
• See page 3 for footnotes
TABLE 3 - MECHANICAL SPECIFICATIONS
Adjustment Turns
21 ± 2
Mechanical Stops
Wiper idles - no discontinuity
Internal Terminations
All welded - no flux
Case Material
Diallyl-phthalate: green (DAP)
Shaft Torque
3 oz. in. maximum
Backlash
0.005 % typical
Document Number: 63052
Revision: 06-Nov-08
For any questions, contact: [email protected]
www.vishay.com
1
1 page  
Disclaimer
Legal Disclaimer Notice
Vishay
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
www.DataSheet4oUth.ceormwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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