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| 1208 Vishay Foil Resistors Bulk Metal(R) Foil Technology Precision Trimming Potentiometers 1 1/4 Inch Rectilinear, RJ12 Style - Industrial Trimmer FEATURES * Temperature Coefficient of Resistance (TCR): 20ppm/C Maximum3 (- 55C to + 150C Ref. @ + 25C); Through the wiper4: 50ppm/C typical * Load Life Stability: 0.5% Maximum R under Full Rated Power for 2000 hours @ + 85C * Settability: 0.1% * Setting Stability: 0.1% Typical2; 0.5% Maximum2, SS * Power Rating5: 0.5 watts @ + 85C * Resistance Range: 20 to 10K * Tolerance: 20%, 10% Product may not be to scale TABLE 1 - MODEL SELECTION* MODEL TERMINATION STYLE P-In Line PC Pins Y-Staggered PC Pins 1 L-Flexible Wire Leads LB-Flexible Wire Leads with bushings *See Figures 1 and 2 in this data sheet. 1208 RJ12 Style AVERAGE STANDARD RESISTANCE VALUES STANDARD POWER RATING @ NO. OF WEIGHT (g) (in ) TOLERANCES + 85C AMBIENT TURNS 2.5 2.5 3.3 5.1 20, 50, 100, 200, 250, 500 1K, 2K, 5K, 10K 20% 0.5W 10% 25 2 NOTES: 1. Preferred termination style for current 1-1/4 Inch rectilinear trimmers (staggered PC pins present a sturdier mounting arrangement for shock, vibration, and impact situations.) 2. Maximum is 1.0% A.Q.L. standard for all specifications except TCR. (For TCR information see notes 3 and 4). "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 stated or better. 3. Maximum TCR applies to the 3 (sigma) limit or 99.73% of a production lot. (Measured end-to-end with wiper off the element.) 4. 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 is a 2 distribution typifying the behavior of the device when used with 40% or more of the total resistance in use. 5. Derated linearly from full power @ + 85C to zero (0) watts @ + 150C. See Figure 3 in this data sheet. 6. Independent of resistance value. 3 ohms maximum available on special request. Special Available Options: Special Marking Special lengths for lead wires (L, LB Style) Hooked leads Alternate bushing and PC combinations Burn-in and screening operations TRIMMERS ADDITIONAL SPECIFICATIONS: * Contact Resistance Variation - CRV (noise): 10 ohms Maximum6 * Hop-off: 0.25% Typical; 1.0% Maximum * Operating Temperature Range: - 55C to + 150C TABLE 2 - ORDERING INFORMATION - 1208 SERIES PARTS Please specify Vishay Model 1208 Precision Trimming Potentiometers as follows: Example: 1208 MODEL NO. P TERMINATION STYLE 100R 10% * Adjustment Turns: 25 2 * Mechanical Stops: Wiper Idles - No Discontinuity 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 RESISTANCE TOLERANCE VALUE See Table 1 for Details. See Figure 1, next page for Standard Marking Illustration. * 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 * 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 Document Number: 63057 Revision 28-Aug-02 www.vishay.com 163 1208 Vishay Foil Resistors Bulk Metal(R) Foil Technology Precision Trimming Potentiometers FIGURE 1 - SCHEMATIC AND DIMENSIONS in inches (millimeters) 1208P (In-Line Pins*) 0.093" (2.36mm) DIAMETER (A) DIA (A) 2 Mtg. Holes 1.000" (25.40mm) C 0.125" (3.18mm) A 0.070" (1.78mm) C Slot 0.025" (0.64mm) W x 0.031" (0.79mm) DP (A) 0.125" (3.18mm) A 0.235" (5.97mm) C 0.325" (8.26mm) A 0.195" (4.95mm) A 0.500" (12.70mm) C 0.028" (0.71mm) DIAMETER (B) DIA (B) 3 Pin Type Leads 0.700" (17.78mm) C 0.900" (22.86mm) C 2 1 0.260" (6.60mm) C 3 0.125" (3.18mm) DIAMETER (A) DIA (A) 2 1 CW 3 Schematic 1.250" (31.75mm) C 1208Y (Staggered Pins*) 0.093" (2.36mm) DIAMETER (A) DIA (A) 2 Mtg. Holes 1.000" (25.40mm) C 0.125" (3.18mm) A 0.070" (1.78mm) C Slot 0.025" (0.64mm) W x 0.031" (0.79mm) DP (A) 0.125" (3.18mm) A 0.235" (5.97mm) C 0.325" (8.26mm) A 0.195" (4.95mm) A TRIMMERS 0.500" (12.70mm) C 0.300" 0.265" (7.62mm) C (6.62mm) C 0.700" (17.78mm) C 2 0.028" (0.71mm) DIA (B) 3 Pin Type Leads 0.100" (2.54mm) C 1 2 CW 1 3 0.125" (3.18mm) DIAMETER (A) DIA (A) 3 1.250" (31.75mm) C Schematic TOLERANCES A = 0.005 Inches (0.13mm) B = 0.003 Inches (0.08mm) C = 0.010 Inches (0.25mm) *Pin leads are gold plated nickel which are solderable or weldable STANDARD MARKING ILLUSTRATION Model No., Resistance Value, Tolerance, TCR Vishay Date Code 1 2 CW 3 Schematic 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 www.vishay.com 164 Document Number: 63057 Revision 28-Aug-02 1208 Bulk Metal Foil Technology Precision Trimming Potentiometers FIGURE 2 - SCHEMATIC AND DIMENSIONS in inches (millimeters) 1208L (Flexible Leads) 0.093" (2.36mm) DIAMETER (A) DIA (A) 2 Mtg. Holes 3 Color Coded Leads-- # 30 AWG Teflon Coated Insulated Stranded Wire 1.000" (25.40mm) C 11.50" (292.10mm) Min. Length Minumum Length G Y R G Y R 1.250" (31.75mm) C 0.125" DIAMETER (3.18mm) DIA (A) (A) R CW Y Schematic G 0.125" (3.18mm) A 0.070" (1.78mm) C Slot 0.025" (0.64mm) W x 0.031" (0.79mm) DP (A) 0.125" (3.18mm) A 0.235" (5.97mm) C 0.325" (8.26mm) A 0.195" (4.95mm) A (R) Vishay Foil Resistors 1208LB (Panel Mounted) 0.093" (2.36mm) DIAMETER (A) DIA (A) 2 Mtg. Holes 3 Color Coded Leads-- # 30 AWG Teflon Coated Insulated Stranded Wire 1.000" (25.40mm) C 11.50" (292.10mm) Min. Length Minumum Length G Y R 0.125" (3.18mm) C 0.195" (4.95mm) A CW Y Schematic G 0.325" (8.26mm) A 0.125" (3.18mm) A 0.042" (1.07mm) B 0.280" (7.11mm) B # 10 - 32 N.C. - 2 0.235" (5.97mm) A 0.400" (10.16mm) A 0.300" (7.62mm) A Slot: 0.025" (0.64mm) W x 0.031" (0.79mm) DP (A) 1.250" (31.75mm) C G Y R Rubber Gasket Lockwasher Hexnut R TRIMMERS TOLERANCES A = 0.005 Inches (0.13mm) B = 0.003 Inches (0.08mm) C = 0.010 Inches (0.25mm) Standard marking shown on previous page. FIGURE 3 - POWER DERATING CURVE Percent of Rated Power +100 +75 +50 +25 0 -50 -25 0 +25 +50 +75 +100 +125 +150 +175 +85C 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: 63057 Revision 28-Aug-02 www.vishay.com 165 |
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