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148, 149
Vishay Spectrol
1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers
148 FEATURES
* Conductive plastic element
* High rotational life (50 000 cycles) * Quiet electrical output * Robust construction
RoHS
COMPLIANT
149 FEATURES
* Cermet element * Low temperature coefficient ( 150 ppm/C) * Robust construction
DIMENSIONS in inches (millimeters)
SINGLE, DUAL OR TRIPLE
0.492 (12.50) 0.031 (0.80) 0.492 (12.50) 0.648 (16.45) 0.185 (4.70)
SOLDER LUG TERMINALS
0.492 (12.500) 0.348 (8.83) 0.250 (6.35) 0.047 (1.200) 0.315 (8.000)
0.375 (9.520)
0.492 (12.500)
0.341 (8.85)
0.024 (0.60)
0.024 (0.600)
0.100 (2.54)
0.100 (2.54)
0.300 (7.62)
0.012 (0.030) 0.200 (5.07)
thread 1/4 32-NEF-2A
0.035 (0.900) 0.071 (1.800) 0.183 (4.650)
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
0.185 (4.70) 0.492 (12.50) 0.031 (0.80) Dual Single
0.024 (0.80)
0.492 (12.50)
0.1 (2.54) 0.2 (5.08)
0.25 0.1 (6.35) (2.54) 0.3 0.2 (7.62) (5.08)
0.06 (1.52) 0.151 (3.85)
0.06 (1.52) 0.25 (6.38) 0.151 (1.52)
Tolerances unless otherwise specified 0.5
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: sfer@vishay.com See also: Application notes
Document Number: 57040 Revision: 31-Jul-06
0.250 (6.380)
0.024 (0.60)
0.125 (3.17)
0.094 (2.400)
0.193 (4.900)
148, 149
1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers
Vishay Spectrol
ELECTRICAL SPECIFICATIONS
PARAMETER Resistance Range Resistance Tolerance Linear Non-Linear Taper Tolerance Linearity (Typical) End Resistance 0.5 watts at 70 C 0 watts at 120 C 148 1 k to 1 M linear 500 to 500 k non-linear 149 100 to 2.0 M linear 250 to 1 M non-linear
Standard 10 % to 500K, 20 % over 500K Standard 10 % to 100K, 20 % over 100K 20 % of the Nominal R at 50 % mechanical rotation 5 % Independent 4 maximum each end 1 watt at 70 C 0 watt at 150 C
Power Rating
Non-Linear or PC mount, derate 50 % Effective Rotation Contact Resistance Variation Maximum Continuous Working Voltage Dielectric Withstanding Voltage Switch Specifications 270 10 without rotary switch 240 10 with rotary switch 1.5 % of total resistance 3 % of total resistance
350 VAC across end terminals, but within power rating Sea Level - 750 VAC 70 000 feet - 350 VAC 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)
MECHANICAL SPECIFICATIONS
Mechanical Rotation Torque Operating Center Detent Stop Strength Weight (approx) Single Dual Triple 0.19 oz 0.27 oz 0.35 oz Single section 0.2 to 3.0 oz - in Dual or triple section 0.3 to 4.5 oz - in 0.6 to 3.0 oz - in 3 in - lbs min 300 5
ENVIRONMENTAL SPECIFICATIONS
148 Operating Temperature Storage Temperature Temperature Cycling (5 Cycles) Load Life (1000 hrs. Rated Load at 70 C) Rotational Load Life TCR - 40 C to + 120 C - 55 C to + 120 C - 40 C to + 120 C (4 % Rt) 10 % Rt 50 000 cycles 1000 ppm/C 149 - 40 C to + 150 C - 55 C to + 150 C - 40 C to + 150 C (3 % Rt) 5 % Rt 25 000 cycles 150 ppm/C
Document Number: 57040 Revision: 31-Jul-06
For technical questions, contact: sfer@vishay.com See also: Application notes
www.vishay.com 103
148, 149
Vishay Spectrol
MARKING
Unit Identification: Ink stamp on periphery
1/2" (12.7 mm) Conductive Plastic and Cermet Potentiometers
ORDERING INFORMATION
148 MODEL S X NUMBER MECHANICAL OF CONFIGURATION SECTIONS G METRIC BUSHING SIZE & SHAFT 56 SHAFT LENGTH 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 k 10K 500K 20 % over 500 k 20K 750K 25K 1M R: CCW Log, 10 % 50K 2M to 500 k 75K 20 % 100K over 500 k 250K P: PC, 0.250 E: PC terminals with E support plate S: Solder lugs e3: Pure Sn S SHAFT STYLE 103 RESISTANCE CODE S TAPER P TERMINAL CONFIGURATION e3 LEAD FINISH
SAP PART NUMBERING GUIDELINES
1
4
8
1
0
F
0
G
J
S
X
1
0
1
0
3
K
A
MODEL
NB SWITCH BUSHING LOCATING OF MOD. PEG
SHAFT
LEADS
OHMIC VALUE/TOL/LAW OR SPECIAL
See the end of this data book for conversion tables
www.vishay.com 104
For technical questions, contact: sfer@vishay.com 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
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