Models 117S, 126S, 151S and 176S Vishay Techno 3/8" [9.52mm] Sq. Wirewound Trimmers FEATURES • Precious metal wiper. • 1.0 watt to + 85°C. • TCR ± 50PPM/°C. • Solderable leads. • Military quality at affordable prices. APPLICATIONS Wirewound trimmers are particularly useful in those applications where any combination of high power, low temperature coefficient of resistance and/or excellent long term life stability are important design considerations. STANDARD RESISTANCE VALUES RESISTANCE* (Ohms) NOMINAL RESOLUTION (%) 10 1.10 20 .85 ELECTRICAL SPECIFICATIONS Electrical Travel: 22 ± 4 turns. Resistance Range: 10 ohms to 10 kilohms. Extended range available in non MIL-Spec product. Resistance Tolerance: ± 5% standard. Closer tolerances available. Temperature Coefficient: (- 65°C to + 150°C) ± 50PPM/°C. Power Rating: 1.0 watt at + 85°C derated to 0 watt at + 150°C. These specifications exceed MIL-Spec. End Resistance: 1 ohm or 2%, whichever is greater. Equivalent Noise Resistance (ENR): 100 ohms maximum. Dielectric (DWV): 1000 VAC at atmospheric pressure. These specifications exceed MIL-Spec. Insulation Resistance: >100,000 Megohms (500 VDC). These specifications exceed MIL-Spec. MECHANICAL SPECIFICATIONS Operating Torque: 5 ounce inch maximum. Rotation: Clutch stop, wiper idles. Weight: 0.935 grams maximum. Resistive Element: Nickel chromium. Rotational Life: 200 cycles minimum. Terminal Strength: 2 pounds for 10 seconds. 50 .65 100 .51 200 .40 500 .45 1k .34 2k .27 5k .20 10k .16 20k .13 25k .12 35k .11 50k .10 *Other resistances available upon request. CIRCUIT DIAGRAM 1 ENVIRONMENTAL SPECIFICATIONS CW 3 2 Temperature Limits: - 65°C to + 150°C. Sealing: Fully sealed case (non-hermetic). DIMENSIONAL CONFIGURATIONS 3/8" [9.52mm] Square [Numbers in brackets indicate millimeters] L Lead Style - 117S P Lead Style - 126S 0.040 ± 0.010 [1.02 ± 0.254] 0.419 ± 0.010 [10.64 ± 0.254] 0.075 ± 0.010 [1.90 ± 0.254] Radius Y 0.380 ± 0.005 G • • [9.65 ± 0.127] CW • R 0.023 ± 0.003 [.584 ± 0.076] 0.117 ± 0.005 [2.97 ± 0.127] 0.313 ± 0.005 [7.95 ± 0.127] 0.375 ± 0.005 [9.52 ± 0.127] 0.025 ± 0.003 [0.635 ± 0.076] #30 AWG leads, color coded Teflon insulated 6" [152.40mm] minimum length www.vishay.com 26 0.060 ± 0.005 [1.52 ± 0.127] Dia. 0.314 ± 0.005 [7.98 ± 0.127] 0.150 ± 0.010 [3.81 ± 0.254] 0.167 ± 0.005 [4.24 ± 0.127] 0.093 ± 0.005 [2.36 ± 0.127] Dia. 1 3 0.100 ± 0.005 [2.54 ± 0.127] 0.100 ± 0.005 [2.54 ± 0.127] X 0.023 ± 0.003 [.584 ± 0.076] 0.023 ± 0.003 [.584 ± 0.076] 2 0.055 ± 0.005 [1.40 ± 0.127] X 0.375 ± 0.005 [9.52 ± 0.127] 0.217 ± 0.005 [5.51 ± 0.127] 0.300 [7.62] Min. 0.027 ± 0.002 [.686 ± 0.051] Dia. Document Number 68016 Revision 23-Sep-99 Models 117S, 126S, 151S and 176S Vishay Techno DIMENSIONAL CONFIGURATIONS 3/8" [9.52mm] Square [Numbers in brackets indicate millimeters] W Lead Style - 151S X Lead Style - 176S 0.314 ± 0.005 [7.98 ± 0.127] 0.139 ± 0.005 [3.53 ± 0.127] 0.040 ± 0.005 [1.02 ± 0.127] 0.025 ± 0.003 [.635 ± 0.076] 0.190 ± 0.005 [4.83 ± 0.127] 0.190 ± 0.005 [4.83 ± 0.127] 0.093 ± 0.005 [2.36 ± 0.127] Dia. 0.023 ± 0.003 [.584 ± 0.076] 0.410 ± 0.010 [10.41 ± 0.254] 0.040 ± 0.005 [1.02 ± 0.127] 0.025 ± 0.003 [0.635 ± 0.076] 0.346 ± 0.005 [8.79 ± 0.127] 0.093 ± 0.005 [2.36 ± 0.127] Dia. 0.375 ± 0.005 [9.52 ± 0.127] 3 2 1 0.410 ± 0.005 [10.41 ± 0.127] 3 2 1 0.100 ± 0.005 [2.54 ± 0.127] 0.027 ± 0.002 [.686 ± 0.051] Dia. 0.100 ± 0.005 [2.54 ± 0.127] 0.139 ± 0.005 [3.53 ± 0.127] 0.100 ± 0.005 [2.54 ± .127] 0.300 [7.62] Min. 0.023 ± 0.003 [.584 ± 0.076] 0.100 ± 0.005 [2.54 ± 0.127] 0.300 [7.62] Min. 0.027 ± 0.002 [.686 ± 0.051] Dia. 0.375 ± 0.005 [9.52 ± 0.127] ENVIRONMENTAL PERFORMANCE TEST1 CONDITIONS MIL-PRF-39015 REQUIREMENT TYPICAL CHANGE Power Conditioning (108) 50 hours at 1 watt at + 25°C ∆R ≤ 0.5%2 ∆R < 0.08% Thermal Shock (107) 5 cycles, -55°C to + 125°C ∆R ≤ 1.0%2 ∆R < 0.07% Low Temperature Storage 72 hours, no load at - 65°C ∆R ≤ 1.0% ∆R < 0.05% Low Temperature Operation 1 hour storage, 45 minutes rated power at - 55°C ∆R ≤ 1.0%2,3 ∆R < 0.08% 2 1000 hours, no load at + 150°C ∆R ≤ 1.0% ∆R < 0.03% Moisture Resistance (106) 480 hours at rated power with humidity ranging from 80% RH to 98% RH ∆R ≤ 1.0%2 ∆R < 0.22% Resistance to Soldering Heat (210) + 350°C for 3 seconds ∆R ≤ 1.0%2 ∆R < 0.02% Shock (213) 18 shocks, 100g, 6 ms, sawtooth, 3 axes ∆R ≤ 1.0%2,3 ∆R < 0.27% 10 to 2000 Hz, 20g, 12 hours, 3 axes ∆R ≤ 1.0% ∆R < 0.04% 200 cycles ∆R ≤ 2.0% ∆R < 0.06% 10,000 hours at rated power at + 85°C ∆R ≤ 3.0% ∆R < 0.23% High Temperature Exposure Vibration (204) Rotational Life Load Life (108) 2,3 2,3 1 Numbers in parenthesis refer to test method MIL-STD-202 as modified by the detail specification. 2 For values below 100 ohms, add 0.05 ohm to the allowable change. 3 The referenced tests also require that setting stability change shall not exceed ± 0.05 percent plus the specified maximum resolution. DERATING HOW TO ORDER WATTS 1.00 0.80 117S MODEL 501 VALUE 117S = Teflon Leadwire 126S = PC Mount 151S = Top Adjustment Screw 176S = Side Adjustment Screw First two digits are significant figures. Last digit specifies number of zeros to follow. 0.60 0.40 0.20 0 25 50 75 85 100 125 150 175 AMBIENT TEMP. DEG. CENTIGRADE Document Number 68016 Revision 23-Sep-99 www.vishay.com 27