 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 1240 Vishay Foil Resistors Bulk Metal(R) Foil Technology Precision Trimming Potentiometers, 1/4 Inch Square, RJ26 Style, Designed to Meet or Exceed The Requirements of Mil-PRF-39035, Char. H FEATURES * Temperature Coefficient of Resistance (TCR): 10ppm/C. (- 55C to + 150C Ref. @ + 25C); Through the wiper3; 25ppm/C (see table 2 for low values) * Load Life Stability: 0.1% Typical R, 1.0% Maximum R under Full Rated Power @ + 85C for 10,000 hours * Settability: 0.05% Typical; 0.1% Maximum * Setting Stability: 0.1% Typical; 0.5% Maximum, SS * Power Rating: 0.25 watts @ + 85C * Resistance Range: 5 to 10K Product may not be to scale TABLE 1 - MODEL SELECTION* MODEL 1240 TERMINATION STYLE W-Edge Mount, Top Adjust 0.4 X-Edge Mount, Side Adjust 20, 50, 100, 200, 500, 1K, 2K, 5K, 10K P-Horizontal Mount, Side Adjust *See Figure 1, next page. 5 AVERAGE WEIGHT (g) STANDARD RESISTANCE VALUES (in ) 5, 10 STANDARD POWER RATING @ NO. OF TOLERANCE + 85C AMBIENT TURNS 10 0.25W 21 2 TABLE 2 - 1240 (RJ26) SERIES ELECTRICAL SPECIFICATIONS TABLE 3 - MECHANICAL SPECIFICATIONS Adjustment Turns Mechanical Stops Internal Terminations Case Material 21 2 Wiper Idles - No Discontinuity All Welded - No Flux 1240X - Diallyl-Phthalate: Green (DAP) 1240W - Diallyl-Phthalate: Green (DAP) 1240P - Thermoplastic: Black 3 oz.in. Maximum 0.005% Typical TRIMMERS Temperature Coefficient of Resistance (TCR) 50 to 10K End-to-End2 Temperature Coefficient of Resistance 5,10 and 20 Through the Wiper3 Stability Load Life @ 10,000 Hours 10ppm/C Maximum (- 55C to + 25C) 10ppm/C Maximum (+ 25C to + 150C) 20ppm/C 25ppm/C 0.1% Typical R 1.0 % Maximum R (Under Full Rated Power of 0.25 watts @ + 85C) 0.25 watts @ + 85C 0.05% Typical; 0.1% Maximum 0.1% Typical; 0.5% Maximum SS 3 Typical 10 Maximum 0.25% Typical; 1.0% Maximum To 100MHz 10ns @ 1K 0.08H Typical 0.5pF Typical -55C to + 150C Shaft Torque Backlash Power Rating Settability 4 TABLE 4 - ORDERING INFORMATION - 1240 SERIES PARTS Please specify Vishay Model 1240 Precision Trimming Potentiometers as follows: Example: 1240 MODEL NO. W TERMINATION STYLE 100R RESISTANCE VALUE 5% TOLERANCE Setting Stability Contact Resistance Variation - CRV (noise)5 Hop -off High-Frequency Operation Rise/Decay Time Inductance Capacitance Operating Temperature Range Refer to last page in this data sheet for footnotes. VISHAY FOIL * FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31 * GERMANY +49.9287.710 FAX: +49 9287.70435 * ISRAEL +972.3.557.0945 FAX: +972.3.558.9121 See Table 1 for details. See Figure 1, next page for Standard Marking designation. * ITALY + 39.2.300.11919 FAX: +39.2.300.11999 * JAPAN +81.42.729.0661 FAX: +81.42.729.3400 * SINGAPORE +65.788.6668 FAX: +65.788.0988 * SWEDEN +46.8.594.70590 FAX: +46.8.594.70581 * UK +44 191 514 8237 FAX: +44 1953 457 722 * USA +1 610 407-4800 FAX: +1 610 640-9081 www.vishay.com 146 Document Number: 63053 Revision 05-Aug-02 1240 Bulk Metal Foil Technology Precision Trimming Potentiometers FIGURE 1 - SCHEMATIC AND DIMENSIONS in inches (millimeters) 1240X 0.040" (1.02mm) C (R) Vishay Foil Resistors 1240W 0.050" (1.27mm) C 0.040" (1.02mm) C VISHAY 0.250" (6.352mm) D VISHAY 1 CW 1 2 3 0.050" (1.27mm) C 0.050" (1.27mm) C 0.100" (2.54mm) A 0.050" (1.27mm) C 0.100" (2.54mm) A 0.125" (3.18mm) C (bottom view) (bottom view) 0.100" (2.54mm) A 0.010" (0.25mm) A 0.050" (1.27mm) C 0.100" (2.54mm) A 0.250" (6.352mm) D 2 CW 3 1 3 2 3 2 1 0.250" (6.35mm) D 0.250" (6.35mm) D 0.175" (4.45mm) C 0.175" (4.45mm) C 0.050" (1.27mm) C 0.125" (3.18mm) C 1240P 0.050" (1.27mm) C VISHAY 0.175" (4.45mm) C 1 CW 3 TOLERANCES A = 0.005" (0.13mm) C = 0.010" (0.25mm) D = 0.020" (0.51mm) STANDARD MARKING Model No. Date Code Resistance Value Tolerance TRIMMERS 1 2 3 0.055" (1.40mm) C 0.035" (0.89mm) C 0.250" (6.35mm) D 0.016" (0.41mm) A Resistance Value Tolerance 0.100" (2.54mm) A 0.250" (6.36mm) D 0.125" (3.18mm) C NOTES Adjustment screw 0.080" (2.03mm) diameter with 0.025" (0.64mm) X 0.030" (0.76mm) slot. Tolerance on screw dimensions is 0.005" (0.13mm). Model 1240 has gold plated terminal pins 0.016" (0.41mm) 0.001" (0.03mm) diameter, 0.200" (5.08mm) length minimum. 0.100" (2.54mm) A 0.125" (3.18mm) C Model No. Date Code FIGURE 2 - POWER DERATING CURVE +85C Percent of Rated Power +100 +75 +50 +25 0 -75 -50 -25 0 +25 +50 +75 +100 +125 +150 +175 Ambient Temperature C VISHAY FOIL * FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31 * GERMANY +49.9287.710 FAX: +49 9287.70435 * ISRAEL +972.3.557.0945 FAX: +972.3.558.9121 * ITALY + 39.2.300.11919 FAX: +39.2.300.11999 * JAPAN +81.42.729.0661 FAX: +81.42.729.3400 * SINGAPORE +65.788.6668 FAX: +65.788.0988 * SWEDEN +46.8.594.70590 FAX: +46.8.594.70581 * UK +44 191 514 8237 FAX: +44 1953 457 722 * USA +1 610 407-4800 FAX: +1 610 640-9081 Document Number: 63053 Revision 05-Aug-02 www.vishay.com 147 1240 Vishay Foil Resistors TABLE 5 - COMPARISON MIL-PRF-39035/3 CHARACTERISTIC H6 TEST GROUP I Conditioning Contact Resistance Variation - CRV (noise) Immersion TEST GROUP I a Visual and Mechanical Actual Effective Electrical Travel End Resistance 1.0 % 3.0% or 37 No continuous stream of bubbles No Failures 10 to 25 Turns 2% or 27 MODEL 1240 MAXIMUM (Worst Case) 0.5 % 3 Typical, 10 Maximum No continuous stream of bubbles No Failures 21 2 Turns { 2 for Values 1K; 5 for Values 2K; Per MIL-Std-202, Methods 301 and 105 Bulk Metal(R) Foil Technology Precision Trimming Potentiometers Dielectric Withstanding Voltage - DWV Per MIL-Std-202, Methods 301 and 105 (Atmospheric and Barometric Pressure) Insulation Resistance 1000 Megohms > 1000 Megohms Shaft Torque 3 oz. in. Maximum 3oz. in. Maximum Thermal Shock 1.0% 0.5% Setting Stability 1.0% 0.5% TEST GROUP II Solderability Per MIL-Std-202, Method 208 Per MIL-Std-202, Method 208 TEST GROUP III Resistance Temperature Characteristic - TCR 0.005% ( 50ppm/C) 0.001% ( 10ppm/C) Moisture Resistance 1.0% 0.5% 7 Contact Resistance Variation - CRV (noise) 3.0% or 3 3 Typical, 10 Maximum TEST GROUP IV Settability 1.0% 0.1% Shock 1.0% 0.5% Setting Stability 1.0% 0.5% Vibration 1.0% 0.5% Setting Stability 1.0% 0.5% Contact Resistance Variation - CRV (noise) 3.0% or 37 3 Typical, 10 Maximum Salt Spray No Corrosion No Corrosion TEST GROUP V Solder Heat 1.0% 0.1% Low-Temperature Operation 1.0% 0.5% Setting Stability 2.0% 0.5% Low-Temperature Storage 1.0% 0.5% High-Temperature Exposure 3.0% 0.5% Setting Stability 2.0% 0.5% 7 Contact Resistance Variation - CRV (noise) 3% or 3 3 Typical, 10 Maximum Integrity of Shaft No Loosening or Breakage No Loosening or Breakage TEST GROUP VI Rotational Life (200 Cycles) 2.0% 2.0% Contact Resistance Variation - CRV (noise) 3% or 3 7 3 Typical, 10 Maximum Terminal Strength 2lbs. 2lbs. TEST GROUP VII Life (2,000 Hours) @ +85C 3.0% 0.1% Typical, 1.0% Maximum Life (10,000 Hours) @ +85C 5.0% 0.1% Typical, 1.0% Maximum TEST GROUP VIII Solvent Resistance No Failures No Failures NOTES: VISHAY TRIMMERS ARE INSPECTED 1. Maximum is 1.0% A.Q.L. standard for all specifications except TCR. (For TCR information, see notes 2 100% For: and 3.) "Typical" is a designers reference which represents that 85% of the lots supplied, over a long period * Short-time overload of time, will be at least the figure stated or better. (6.25 x rated power for 5 seconds on; 2. Maximum TCR applies to the 3 (sigma) limit or 99.73% of a production lot. (Measured end-to-end with and for 30 seconds off - 3 cycles) wiper off the element.) 3. Measurements of TCR through the wiper are influenced more by setting stability and the percentage of * Immersion the total resistance in use (at the wiper) than by fundamental resistance change due to temperature alone. * Resistance tolerance check The parameter shown in Table 2 is a 2 distribution typifying the behavior of the device when used with 40% or more of the total resistance in use. * End Resistance 4. Derated linearly for full power @ + 85C to zero (0) watts @ + 150C. See Figure 2 on previous page.. * Visual-Mechanical 5. Independent of resistance value. 3 ohms maximum available on special request. * Dynamic tests for Continuity, CRV 6. All R's are measured to the tolerance specified + 0.01ohms 7. Whichever is greater. By Sample For: Special Available Options: * TCR Special marking * DWV Burn-in and screening operations VISHAY FOIL * FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31 * GERMANY +49.9287.710 FAX: +49 9287.70435 * ISRAEL +972.3.557.0945 FAX: +972.3.558.9121 * ITALY + 39.2.300.11919 FAX: +39.2.300.11999 * JAPAN +81.42.729.0661 FAX: +81.42.729.3400 * SINGAPORE +65.788.6668 FAX: +65.788.0988 * SWEDEN +46.8.594.70590 FAX: +46.8.594.70581 * UK +44 191 514 8237 FAX: +44 1953 457 722 * USA +1 610 407-4800 FAX: +1 610 640-9081 TRIMMERS www.vishay.com 148 Document Number: 63053 Revision 05-Aug-02 |
Price & Availability of 1240
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |