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 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 1242 (RJ26) TERMINATION STYLE W-edge mount, top adjust X-edge mount, side adjust AVERAGE WEIGHT (g) STANDARD RESISTANCE VALUES (in Ω)1) STANDARD TOLERANCE2) POWER RATING at + 85 °C AMBIENT NO. OF TURNS 0.4 50, 100, 200, 500, 1K, 2K, 5K ± 10 % 0.25 W 21 ± 2 Note * See figure 1 TABLE 2 - 1242 (RJ26) SERIES ELECTRICAL SPECIFICATIONS3) Temperature Coefficient of Resistance (TCR) End-to-end4) ± 10 ppm/°C maximum (- 55 °C to + 150 °C, 25 °C ref.) Through the wiper5) ± 25 ppm/°C Stability Load life at 1000 h 0.1 % typical ΔR 1.0 % maximum ΔR (under full rated power of 0.25 W at + 85 °C) Power Rating (at + 85 °C)6) 0.25 W Settability 0.05 % typical; 0.1 % maximum Setting Stability 0.1 % typical; 0.5 % maximum ΔSS Contact Resistance Variation - CRV (noise) ± 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 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 FIGURE 1 - SCHEMATIC AND DIMENSIONS in inches (millimeters) 1242W 0.040" (1.02 mm) C 0.040" (1.02 mm) C VISHAY 0.250" (6.35 mm) D 2 CW 3 1 STANDARD MARKING: Model No. 2 3 1 Date Code Resistance Value 0.250" (6.35 mm) D Tolerance 0.050" (1.27 mm) C 0.175" (4.45 mm) C 0.100" (2.54 mm) A 0.050" (1.27 mm) C 0.100" (2.54 mm) A NOTES: Adjustment screw 0.070" (1.78 mm) diameter with 0.020" (0.51 mm) X 0.020" 0.125" (3.18 mm) C (0.51 mm) slot. Model 1242 1242X 0.040" (1.02 mm) C has gold plated terminal pins 0.016" (0.41 mm) ± 0.001" (0.03 mm) diameter, 0.200" 0.250" (6.35 mm) D (5.08 mm) length minimum. VISHAY 1 3 TOLERANCES: CW A = ± 0.005" (0.13) 1 2 2 3 C = ± 0.010" (0.25) D = ± 0.020" (0.51) 0.050" (1.27 mm) C 0.250" (6.35 mm) D 0.050" (1.27 mm) C 0.100" (2.54 mm) A 0.175" (4.45 mm) C 0.050" (1.27 mm) C 0.100" (2.54 mm) A 0.125" (3.18 mm) C Percent of Rated Power FIGURE 2 - POWER DERATING CURVE + 85 °C + 100 + 75 + 50 + 25 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 Ambient Temperature °C www.vishay.com 2 For any questions, contact: [email protected] Document Number: 63052 Revision: 06-Nov-08 1242 Bulk Metal® Foil Technology Vishay Foil Resistors Precision Trimming Potentiometers, QPL Approved 1/4 Inch Square, Qualified to MIL-PRF-22097, Char. F, RJ26 TABLE 4 - COMPARISON MIL-PRF-22097/5 CHARACTERISTIC F8) (RJ26) 1242 SPECIFICATIONS No failures No failures TEST GROUP I Visual and mechanical Total resistance ± 10 % ± 10 % 10 to 25 turns 21 ± 2 turns End resistance ± 2 % or 20 Ω7) 2 Ω (values ≤ 1 kΩ) ; 5 Ω (values ≥ 2 kΩ) Contact resistance variation - CRV (noise) ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) Per MIL-STD-202, methods 301 and 105 Per MIL-STD-202, methods 301 and 105 Actual effective electrical travel Dielectric withstanding voltage - DWV (atmospheric and barometric pressure) Insulation resistance Shaft torque Thermal shock > 1000 MΩ > 1000 MΩ 3 oz. in. maximum 3 oz. in. maximum ± 1.0 % 0.1 % typical; 0.5 % maximum ± 0.01 % (± 100 ppm/°C) ± 0.001 % (10 ppm/°C) TEST GROUP II Resistance temperature characteristic - TCR Moisture resistance Contact resistance variation - CRV (noise) ± 1.0 % ± 0.5 % ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) TEST GROUP III Shock (specified pulse) ± 1.0 % ± 0.5 % Vibration (high-frequency) ± 1.0 % ± 0.5 % ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) No corrosion No corrosion Contact resistance variation - CRV (noise) Salt spray TEST GROUP IV Solder heat ± 1.0 % ± 0.1 % Life (1000 h at 85 °C) ± 2.0 % ± 1.0 % ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) Low-temperature operation ± 1.0 % ± 0.5 % High-temperature exposure ± 2.0 % ± 0.5 % ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) Contact resistance variation - CRV (noise) TEST GROUP V Contact resistance variation - CRV (noise) TEST GROUP VI Rotational life Contact resistance variation - CRV (noise) Terminal strength ± 2.0 % ± 2.0 % ± 3.0 % or 3 Ω7) ± 3.0 % or 3 Ω7) 2 lbs. 2 lbs. TEST GROUP VII Solderability Immersion TEST GROUP VIII Fungus MIL-STD-202 method 208 MIL-STD-202 method 208 No continuous stream of bubbles No continuous stream of bubbles MIL-STD-810 method 508 MIL-STD-810 method 508 No mechanical damage No mechanical damage Notes 1. 5 Ω, 10 Ω, and 20 Ω resistance values available on special order. 2. 5 % resistance tolerance available on special order. 3. Maximum is 1.0 % A.Q.L. standard for all specifications except TCR. (For TCR information, see notes 4 and 5.) “Typical” is a designers reference which represents that 85 % of the lots supplied, over a long period of time, will be at least the figure shown or better. 4. Maximum TCR applies to the 3 σ (sigma) limit or 99.73 % of a production lot. (Measured end-to-end with wiper off the element.) 5. Measurements of TCR through the wiper are influenced more by setting stability and the percentage of the total/resistance in use (at the wiper) than by fundamental resistance change due to temperature alone. The parameter shown in table 2 is a 2 s distribution typifying the behavior of the device when used with 40 % or more of the total resistance in use. 6. Derated linearly for full power at + 85 °C to zero (0) W at + 150 °C. See figure 2 on previous page. 7. Whichever is greater. 8. All ΔR’s are measured to the tolerance specified + 0.01 Ω. Document Number: 63052 Revision: 06-Nov-08 For any questions, contact: [email protected] www.vishay.com 3 1242 Bulk Metal® Foil Technology Precision Trimming Potentiometers, QPL Approved 1/4 Inch Square, Qualified to MIL-PRF-22097, Char. F, RJ26 Vishay Foil Resistors TABLE 5 - GLOBAL PART NUMBER INFORMATION NEW GLOBAL PART NUMBER: Y0057500R000K0L (preferred part number format) DENOTES PRECISION VALUE AER* Y R=Ω K = kΩ 0 = gold plated termination 1 - 999 = custom Y 0 0 5 7 5 PRODUCT CODE 0 0 R 0 0 RESISTANCE TOLERANCE 0057 = 1242W 4057 = 1242X 0 K 0 L PACKAGING K = ± 10.0 % L = bulk pack FOR EXAMPLE: ABOVE GLOBAL ORDER Y0057 500R000 K 0 L: TYPE: 1242W VALUE: 500.0 Ω ABSOLUTE TOLERANCE: ± 10.0 % TERMINATION: gold plated PACKAGING: bulk pack HISTORICAL PART NUMBER: RJ26 F W 501 (will continue to be used) RJ26 F W 501 MODEL CHARACTERISTIC MOUNTING TYPE RJ26 Having specifications per table 1 of MIL-PRF-22097 (i.e., TCR of 100 ppm/°C, power rating of 0.25 W at + 85 °C and improved environmental specifications) W, PC pins (edge mount, top adjust) RESISTANCE VALUE First 2 digits significant, last digit represents the number of zeros (i.e., 501 = 500 Ω) X, PC pins (edge mount, side adjust) Note * Application engineering release: for non-standard requests, please contact application engineering. www.vishay.com 4 For any questions, contact: [email protected] Document Number: 63052 Revision: 06-Nov-08 Legal Disclaimer Notice Vishay Disclaimer 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 otherwise 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