148, 149 Vishay Spectrol 1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers 148 FEATURES • Conductive plastic element RoHS • High rotational life (50 000 cycles) COMPLIANT • Quiet electrical output • Robust construction 149 FEATURES • Cermet element • Low temperature coefficient (± 150 ppm/°C) • Robust construction DIMENSIONS in inches (millimeters) SINGLE, DUAL OR TRIPLE 0.492 (12.500) 0.100 (2.54) 0.100 (2.54) 0.012 (0.030) 0.200 (5.07) 0.300 (7.62) thread 1/4 32-NEF-2A 0.183 (4.650) 0.193 (4.900) 0.035 (0.900) 0.071 (1.800) 0.250 (6.380) 0.125 (3.17) 0.024 (0.60) 0.024 (0.60) 0.375 (9.520) 0.315 (8.000) 0.094 (2.400) 0.047 (1.200) 0.250 (6.35) 0.492 (12.500) 0.348 (8.83) 0.341 (8.85) 0.492 (12.50) 0.031 (0.80) 0.648 (16.45) 0.185 (4.70) 0.024 (0.600) 0.492 (12.50) SOLDER LUG TERMINALS 0.012 (0.300) 0.188 (1.770) thread 3/8 32-NEF-2A 0.183 (4.650) FRONT AND REAR SUPPORT PLATES E = Flush with board surface 0.492 (12.50) 0.031 (0.80) Dual Single 0.024 (0.80) 0.492 (12.50) 0.185 (4.70) 0.1 (2.54) 0.2 (5.08) 0.25 0.1 (6.35) (2.54) 0.3 0.2 (7.62) (5.08) Tolerances unless otherwise specified ± 0.5 0.06 (1.52) 0.151 (3.85) 0.06 (1.52) 0.25 (6.38) 0.151 (1.52) MOUNTING ACCESSORIES: PRODUCT IS SUPPLIED WITH A NUT & WASHER OPTIONAL FEATURES Up to three sections PC support plates Rotary switches, detents, Solder lugs terminals CONSTRUCTION MATERIALS Housing - Molded thermoplastic white Shaft - Brass, nickel plated www.vishay.com 102 For technical questions, contact: [email protected] See also: Application notes Document Number: 57040 Revision: 31-Jul-06 148, 149 1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers Vishay Spectrol ELECTRICAL SPECIFICATIONS PARAMETER Resistance Range Resistance Tolerance Linear Non-Linear 148 149 1 kΩ to 1 MΩ linear 500 Ω to 500 kΩ non-linear 100 Ω to 2.0 MΩ linear 250 Ω to 1 MΩ non-linear Standard ± 10 % to 500K, ± 20 % over 500K Standard ± 10 % to 100K, ± 20 % over 100K Taper Tolerance 20 % of the Nominal R at 50 % mechanical rotation Linearity (Typical) ± 5 % Independent 4 Ω maximum each end End Resistance 0.5 watts at 70 °C 0 watts at 120 °C Power Rating 1 watt at 70 °C 0 watt at 150 °C Non-Linear or PC mount, derate 50 % 270° ± 10° without rotary switch 240° ± 10° with rotary switch Effective Rotation Contact Resistance Variation 1.5 % of total resistance Maximum Continuous Working Voltage 3 % of total resistance 350 VAC across end terminals, but within power rating Sea Level - 750 VAC 70 000 feet - 350 VAC Dielectric Withstanding Voltage Rotary (AL) switch: S.P.S.T and S.P.D.T 125 mA, 28 VDC CCW or CW, rotational life 10 000 cycles (rated load) Switch Specifications MECHANICAL SPECIFICATIONS Mechanical Rotation 300° ± 5° Torque Operating Single section 0.2 to 3.0 oz - in Dual or triple section 0.3 to 4.5 oz - in Center Detent 0.6 to 3.0 oz - in Stop Strength 3 in - lbs min Weight (approx) Single 0.19 oz Dual 0.27 oz Triple 0.35 oz ENVIRONMENTAL SPECIFICATIONS 148 149 Operating Temperature - 40 °C to + 120 °C - 40 °C to + 150 °C Storage Temperature - 55 °C to + 120 °C - 55 °C to + 150 °C - 40 °C to + 120 °C (4 % ΔRt) - 40 °C to + 150 °C (3 % ΔRt) Temperature Cycling (5 Cycles) 10 % ΔRt 5 % ΔRt Rotational Load Life 50 000 cycles 25 000 cycles TCR ± 1000 ppm/°C ± 150 ppm/°C Load Life (1000 hrs. Rated Load at 70 °C) Document Number: 57040 Revision: 31-Jul-06 For technical questions, contact: [email protected] See also: Application notes www.vishay.com 103 148, 149 1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers Vishay Spectrol MARKING Unit Identification: Ink stamp on periphery ORDERING INFORMATION 148 MODEL S X NUMBER MECHANICAL OF CONFIGURATION SECTIONS G METRIC BUSHING SIZE & SHAFT 56 SHAFT LENGTH S SHAFT STYLE 103 RESISTANCE CODE Ω S TAPER P TERMINAL CONFIGURATION e3 LEAD FINISH P: PC, 0.250 E: PC terminals with E support plate S: Solder lugs e3: Pure Sn FROM THE MOUNTING SURFACE 148 CP 149 Cer S: Single D: Duals T: Triple X: None (single N: 1/4 Dia x 1/4 L Shaft length code S: 32: 1/2 in shaft Shaft 1/8 Dia Slotted J: 1/4 Dia x 3/8 L 40: 5/8 in F: D, T sections) S: Single w/rotary 48: 3/4 in Shaft, 1/8 Dia Flatted G: 3/8 Dia x 3/8 L 56: 7/8 in P: Plain switch Shaft, 1/4 Dia P: Dual w/rotary 64: 1 in slotted in 80: 1 1/4 in switch std. on request F and P EIA code - first 2 significant digits 3rd is number of zeros 100 250 500 750 1K 2.5K 5K S: Linear ± 10 % Z: CW Log, ± 10 % to 500 kΩ 10K 500K ± 20 % over 500 kΩ 20K 750K 25K 1M R: CCW Log, ± 10 % 50K 2M to 500 kΩ 75K ± 20 % 100K over 500 kΩ 250K SAP PART NUMBERING GUIDELINES 1 4 MODEL 8 1 0 F 0 NB SWITCH BUSHING LOCATING OF MOD. PEG G J SHAFT S X 1 LEADS 0 1 0 3 K A OHMIC VALUE/TOL/LAW OR SPECIAL See the end of this data book for conversion tables www.vishay.com 104 For technical questions, contact: [email protected] See also: Application notes Document Number: 57040 Revision: 31-Jul-06 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