NY g Ie Part obey en Fanaa Conductive-Plastic Potentiometer Description Our Series 392 and RV6/392M, are economical potentiometers designed to meet wave soldering applications for mounting to PC boards. They meet flow solderability and washability test requirements, and MIL-R-94 standards apply where appropriate. Series 392M incorporates all the washable characteristics of the Series 392, the new military version Series 392M is now QPL listed under MIL-R-94 Style RV6. Turn to the stock options, page 56 for a complete listing of available types and stock values. Features * Washable and wave solderable Shaft seal standard * Locking bushings available standard Low cost Made in accordance to MIL-R-94 50 Series 392 Electrical Specifications Resistance Range 100Q to 5 Megohms, linear; 500Q to 2 Megohms, tapered (commercial). 100Q to 1 Megohn, linear; 500Q to 1 Megohm, tapered (392M/RV6). Resistance Tolerance Linear, up to 1 Megohm +10%; | Megohm to 5 Megohms +20%. Tapers, up to 250KQ +10%; 250KQ to 5 Megohms +20%. Power Rating (Watts) 0.5 watt maximum continuous power rating for linear taper, but voltage not to exceed rating. Full rating @ 70C, derated linearly to zero watts at 120C. Derate all non-linear tapers by multiplying wattage rating by 0.5. See Chart B, page 52. Bushingless style derated to .25 watt. Electrical Rotation 295 +5 Effective Rotation 265, +0/ -10 Tapers Right or left-hand available. See Chart A, page 51. Taper Tolerance +20% of nominal resistance @ 50% + 3% mechanical rotation End Resistance 4Q maximum for linear taper; 15Q maximum for non-linear tapers. Dielectric Withstanding Voltage 750 Vac for 60 seconds @ ATM pressure. 350 Vac for 60 seconds @ 3.4 in. Hg. Working Voltage 350 Vde across end terminals, but power not to exceed rating. Resistance Temperature Characteristics See Chart C, page 52. Dynamic Noise Linear single controls maximum initial noise level 1.5% of total resistance. Measurement made using a constant current source and oscilloscope detection technique. 1% available on special order. Linearity +5%independent linearity measured over 1% to 99% voltage ratio output. Voltage Coefficient .008%/Volt, maximumSeries 392 Mechanical Specifications Mechanical Rotation 295 +5 Stop Torque 3 lb. in. minimum (metal shaft) 2 Ib. in. minimum (plastic shaft) Torque Range -20 to 2.0 oz. in. Other torques available. Bushing Lengths Metal: .25 in. (6.35mm), .375 in. (9.53mm), and .5 in. (12.7mm), Plastic: .25 in. (6.35mm) and .375 in. (9.53 mm). Shafts, Standard -125 in. (3.18mm) diameter Shaft Lengths Metal: Lengths from flush with trimmer bushing to 3 in. (76.2mm) in 1/64 in. (0.40 mm) increments. Brass, nickel-plated. Plastic: Standard lengths of 3/8 in. (9.53mm), 1/2 in. (12.7mm), 5/8 in. (15.88mm), 3/4 in. (19.05mm), and 7/8 in. (22.23mm) Flat is .094 +.002 x .250 in. (2.39mm +0.051 x 6.35 mm) long. Slot is in line with contact and the flat is opposite the contact. Switch None available Seal O-ring shaft seal standard all styles, and the complete unit is sealed for wave solder and wash processing. The shaft seal withstands 5 PSI pressure. Mounting seals are available. See Chart D, page 52. Housing Thermoplastic polyester, blue (U.L. SE-O rating) Hardware Mounting hardware available. Hex mounted nut 1/4 in. (6.35mm) x 32 thread, 5/16 in. (7.94mm) across flats 1/16 in. (1.59mm) thick. Internal tooth lockwasher, 13.32 in. (10.32mm) outside diameter x .025 in. (.64mm) thick. Hex jam nut 5/16 in. (7.94mm) across flats 5/32 in. (3.97mm) thick. Contact Material Monel Solvent Resistance Housing resistant to trichlorethylene, *Chlorethene NU, **Freon TMS, Freon TMC, carbon tetrachloride, toulene, MEK, ethyl acetate and gasoline. For solvents not listed, contact Factory. Mechanical Specifications continued, next column Mechanical Specifications continued Terminals Solder-coated. P.C. pin or solder hook style. PC pins fit -100 in. (2.54mm) grid spacing and .034 in. (0.86mm) diameter board holes. Pin diameter is .028 in. (0.71mm). Weight (Aprox.) Metal shaft & bushing .25 oz.; Plastic .1 oz. *T.M. Dow Chemical Co. **T.M. DuPont Series 392 Operational Specifications Operating Temperature Range -40C to +120C.; Storage Temperature Range -55C to +120C, Rotational Life Rotational Life for linear control: 50,000 cycles, plain bushing style only. Change not to exceed 10% R (standard). NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. % RESISTANCE & : \A ] . J 0 V 0 sea Pt % EFFECTIVE ROTATION CLOCKWISE Curves Standard The "S taper is linear, the change in resistance value being directly proportional to the degree of rotation. It can be used either as right- hand or left-hand taper. The "Z" taper attains 10% resistance value at 50% of clockwise rotation (left-hand). The reverse "Z" taper attains 10% resistance value at 50% of counter- clockwise rotation (right-hand). For conformity and special output curves, consult Factory. 51Figure 2 Chart B RATED POWER IN PERCENT POWER DERATING GRAPH TEMPERTURE IN DEGREES CENTIGRADE Figure 3 Chart C NOMINAL MAXIMUM PERCENT TEMPORARY RESISTANCE FROM 25C RESISTANCE | -55C | _-40C 0C +25C | +55C | +85C_ | +120C 100 OHMS 45.0 +40 | 415 0 +1.5 42.0 43.5 10K OHMS +7.0 +5.5 +2.0 0 +1.5 +2.5 45.5 100K OHMS | +8.0 +6.0 +2.5 0 +2.0 +3.5 +6.0 1 MEGOHMS | +10.0 +8.0 +3.0 0 42.5 +4.0 +7.5 Figure 4 Chart D r To Wave Solder And Board Wash Parameters ve EL =e Recommended Profile, Temperature on P.C. Board x6 if Process Limits Temperature Time Lo! | bat BLOW ORY = + A Preheat Maximum 195F 1 minute . \ wai \ POISE Solder Temperature Maximum 550F ms N . . BAKE ORY in Maximum differential temperature 1 +t after solder in wash (3/4T) 72F - / ~ Wash Temperature 150-160F 1-1/2 minutes 148 HH 7 Wy Dry Temperature 160-220F 2 minute we Z et 1 2 3 4 6 a 52Figure 5 Series 392 Potentiometer Dimensions [842mne} | [r2ehen 3-rnp || f.renm 0A) Si - 1/432, EF-2A Somme 0500) +.000 [000mm] *MOLDED SHAFT .124 [3.15mm] =.002. [060mm] PANEL MOUNTING LAYOUT STOCK BUSHING = 1/4[6.35mm] LONG SHAFT = 7/8[22.23mm] LONG Figure 6 Series 392-5 Trimmer Dimensions +010 .005 000 031 WIDE X .031 DEEP SLOT Et.013mm] | oer i i, [0.7mm X 0.7emnm] P.C. BOARD LAYOUT -100 GRID- 53Figure 7 Series 392 B-56 Stud Mounting ~~ PC MOUNTING LAYOUT Peas "2 wa a Mf taste ria) ao q L THREAD | ETB [6.53] @ 7 = 4 MOUNTING BOARD [sen a ON ttt | 060 4.005 [153mm 0.13] Figure 8 Series 392 B-57 Stud Mounting ase Rom] 7] > 7 B- | te | Counc eowro Lo. = 046 DIAMETER (ON 3) [1.17mm] .100(0N 230% PC MOUNTING LAYOUT 500 +.010 [12.70mm 0.25] Ps re 54 Teen 9 L ee ~-ee idem 2)Series 392 Standard Resistance Values Series 392 How To Order Stock Values (Ohms) Example: 392-JA-100 100 250 Tf 1h 500 Series Shaft. & Bushing Resistance Value IK JA = Metal shaft & bushing (Ohms) 2500 JB = Plastic shaft & bushing 5K 5 (Trimmer) = Plastic shaft & faceplate 10K 25K 50K 100K 250K 500K 1 Meg. 2.5 Meg. 5 Meg. Catalog Number Description 392JA Metal shaft and bushing 392JB Plastic shaft and bushing 392-5 Trimmer Plastic shaft and faceplate Figure 9 OO Series 392M/RV6 Dimensions 21/32 woe MOUNTING SURFACE [16.67] 500 0.16 ma ie er emt | x ezom ce eS as +5 08 2) | 125 DA. 4.001 <a 18mm + 03mm] Y S Rs - S| - a ima Cy ear 76mnen) mime | L lables on $80 1-7 Xe ou [231mm 42:13 ] wr ai O38 DESH OF woxe-TuR (028 WES SPLIT LOCKING BUSHING MOUNTING SEAL CONSTRUCTION MOUNTING SURFACE 31/64 21/64 MOUNTING SURFACE (52.44mm +0.40mm] O-RING (MOUNTING SEAL) 55Series 392M/RV6 Standard Resistance Values Stock Values (Ohms/Linear Taper) RV6NAY RV6LAY SD & SL SA & SD 101A 252A 101A 252A 102A 253A 102A 253A 103A 254A 103A 254A 104A 501A 104A 501A 105A 502A 105A* 502A 153A 503A 153A 503A 154A 504A 154A* 504A 251A 251A* 205B* Note: Special options available. Please consult Factory. *Made to order. Please consult Factory. Series 392M/RV6 How To Order Tf 1 7 4F Series Switch Resistance 392M A = None Significant Style ShaftStyle | Digits S$ = Slotted Bushi F = Flatted N = Standard, 1/4 in. (6.35mm) long x 1/4 in. See Table (6.35mm)- Below 32-NEF-2A L = Locking, Temperature Number of 1/2 in. (12.7mm) Characteristic zeros that long x 1/4 in. follow (6.35mm)- 32-NEF-2A4, 5 = Shaft & panel seal, A =+10% Linear standard bushing B = +20% Linear T = Shaft & panel seal, *C = Log CW +10% locking bushing *D = Log CW +20% *E = Log CCW +10% *F = Log CCW 20% *10% resistance at 50% mechanical rotation. Shaft Length** With 1/4 in. (6.35mm) With 1/2 in. (12.7mm) Symbol Bushing N or S Bushing L or T A 5/8 in. (15.88mm) 5/8 in. (15.88mm) B 1/2 in. (12.7mm) - D 7/8 in. (22.23mm) 7/8 in. (22.23mm) L 3/8 in. (9.53mm) - **Shaft length from mounting surface. 56