Series 409 Modular Potentiometer
Thick-Film Cermet—1/2" square
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| Description |
| The Series 409 high-performance potentiometers are designed to meet wave soldering applications for mounting to PC boards. Available with up to three switch and potentiometer modules
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| Features: |
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Compact—1/2 in. (12.7mm) miniature, totally sealed, modular size
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Precision Made—screen-printed thick-film cermet elements.
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Cost-effective—Elimination of hand soldering.
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Rugged—Horizontal or vertical mountings with support plates. Nickel-plated brass
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Stability—-40°C to +150°C operating temperature.
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Board Washable
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Series 408 Conductive Plastic version available
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Electrical Specifications
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Resistance
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Linear: 5 ohms to 5 megohms
Non-linear: 100 ohms to 2 Megohms
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Resistance Range
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±10% standard
±5% special
Trimmers: ±20%
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End Resistance
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2 ohms maximum, 5 ohms to 2.5K ohms
4 ohms maximum, 5Kohms and above
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Power Rating
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1.0 watt @ 85°C. Derate linearly to zero watts at 150°C
Derate non-linear tapered units or PC mounted units by 50%
Derate trimmer style by 50%
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Dynamic Noise
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Standard: Linear single controls maximum initial noise level of 3% of total resistance. Measurement made using constant current source and oscilloscope detection technique
Special: 1.5% available
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Electrical Rotation
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295° ±5°
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Effective Rotation
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265° ±5°
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Working Voltage
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350 Vdc across end terminals, but power not to exceed rating
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Linearity
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±5% independent
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Non-linear Tapers
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Right or left-hand available. See data sheet
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Taper Tolerance
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±20% of nominal resistance @ 50%
±3% of mechanical rotation
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Voltage Coefficient
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.008%/Volt maximum
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Dielectric Withstanding Voltage
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900 Vac for 60 seconds @ ATM pressure
350 Vac for 6 seconds @ 3.4 in. Hg.
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Mechanical Specifications
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Mechanical Rotation
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295° ±5°
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Torque Range
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Single module: 0.20 to 3.0 oz. in.
Dual: 0.3 to 3.5 oz. in.
Triple: 0.4 to 4.5 oz. in.
Other torque options available.
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Stop Torque
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3 lb. in. minimum (metal shaft)
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Torque Variation
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Within control .5 oz. in. maximum
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Bushing Lengths
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.25 in. (6.35mm), .375 in. (9.53mm), .5 in. (12.7mm)
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Shafts, Standard
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.125 in. (3.18mm) diameter; brass, nickel-plated
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Shaft Lengths
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Lengths from mounting surface to 3 in. (76.2mm) in 1/64 in. (.397mm) increments
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Push-Pull and Momentary Switch
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Type BL: push-pull SPDT, 250ma, 30Vdc
Type BLM: Momentary SPDT, 250ma, 30Vdc
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Rotary Switch
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Type AL: SPST or SPDT, CCW or CW, 125ma, 28Vdc
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Seals
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O-ring shaft seal standard all styles
Complete unit is sealed for wave solder and wash processing
Shaft seal withstands 3 PSI pressure
Mounting seals are available.
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Housing
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Thermoplastic polyester, blue. (U.L. SE-O rating)
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Hardware
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Nut: brass, nickel-plated
Lockwasher: phosphorous bronze, nickel-plated
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Solvent Resistance
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Housing resistant to trichlorethylene, Chlorethene NU, Freon TMS, Freon TMC, toluene, MEK, ethyl acetate and gasoline
For solvents not listed, please consult Factory
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Terminals
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Gold-coated PC terminals or solder hook style
PC pins fit .100 grid spacing
Terminal mounting options available
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Weight (approx.)
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Single module: .19 oz., Dual: .27 oz., Triple: .35 oz. (Metal shaft & bushing)
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