Description
Vishay Spectrol 860 1K Potentiometer
Vishay Spectrol 860 1K Potentiometer is a precision 10-turn wirewound potentiometer designed for accurate, repeatable and stable electrical adjustment in industrial control equipment. This configuration has a total resistance of 1 kΩ, a single electrical section and a bushing-mount construction suitable for installation through an equipment panel.
The Vishay Spectrol Model 860 has a nominal body diameter of 1 13/16 inches, equivalent to approximately 46 mm. Its large precision construction, stainless-steel shaft and wirewound resistance element make it suitable for demanding control applications where fine adjustment and reliable mechanical performance are required.
In compatible generator and SCR control panels, this potentiometer may be used as a speed adjustment or voltage adjustment control. Equipment compatibility must be confirmed using the resistance value, power rating, shaft dimensions, mounting arrangement and electrical circuit requirements.
10-Turn Precision Wirewound Operation
The potentiometer provides approximately 3600 degrees of electrical and mechanical rotation, corresponding to ten complete shaft turns. Compared with a conventional single-turn potentiometer, the multi-turn design allows substantially finer control over the full 1 kΩ resistance range.
This makes the Vishay Spectrol 860 1K Potentiometer suitable for applications where small shaft movements must produce gradual and controlled electrical changes. Typical examples include generator speed setting, voltage regulation, SCR firing control, calibration equipment, industrial power controls and test instruments.
The wirewound resistance technology provides stable adjustment and dependable performance in industrial systems. It is especially useful where precision, repeatability and resistance to normal mechanical wear are more important than rapid adjustment.
8 W Power Rating at 40°C
According to the official Vishay Model 860 datasheet, the potentiometer has a rated power of 8 W at an ambient temperature of 40°C. The allowable power is progressively derated as ambient temperature increases and reaches zero at 125°C.
The actual permissible power in an installed circuit depends on operating temperature, ventilation, applied voltage, current and equipment design. The potentiometer should therefore be selected and operated within the limits stated in the manufacturer’s technical documentation.
1 kΩ Resistance and Single-Section Configuration
This version has a nominal resistance of 1 kΩ and one electrical section. For resistance values of 200 Ω and above, the standard resistance tolerance stated for the Model 860 series is ±3%. The standard independent linearity specification is ±0.25%, with tighter special linearity options available for selected configurations.
The single-section construction provides one adjustable resistance element with three electrical terminals. Depending on the circuit connection, the component can function as a voltage divider or as a variable resistance control.
Bushing-Mount Panel Installation
The Model 860 uses a threaded bushing for secure panel mounting. A panel nut and internal-tooth lock washer are used to hold the potentiometer firmly in position after it has been inserted through the mounting opening.
The unit has a nominal 1/4-inch stainless-steel shaft with an actual specified diameter of approximately 0.2497 inches or 6.34 mm. The threaded mounting bushing is specified as 3/8-32 UNEF, and the manufacturer’s dimensional drawing indicates a mounting-hole diameter of approximately 10.32 mm.
Before replacing an existing potentiometer, users should verify the shaft length, shaft diameter, panel-hole diameter, available clearance, terminal arrangement and mounting depth.
Industrial Generator and SCR Panel Applications
The Vishay Spectrol 860 1K Potentiometer is suitable for compatible industrial systems requiring precise manual adjustment. Potential applications include generator control panels, SCR panels, drilling equipment, industrial motor controls, power regulation equipment, process control systems and laboratory instruments.
When installed as a speed adjustment control, the potentiometer can provide a variable reference signal to a compatible governor or control circuit. When installed as a voltage adjustment control, it may be used to vary the reference setting of a compatible voltage regulation or power-control circuit.
The exact function is determined by the equipment circuit and not solely by the potentiometer. The replacement component must therefore match the electrical and mechanical specifications of the original part.
Durable Mechanical Construction
The potentiometer incorporates a nickel-plated aluminum bushing, molded glass-filled thermoset housing, glass-filled nylon rear cover and a non-magnetic stainless-steel shaft. Its terminals are plated brass designed for solderability.
The official technical data specifies resistance to industrial vibration and shock, an operating temperature range from -55°C to +125°C and a rotational life of up to 500,000 shaft revolutions under the manufacturer’s test conditions.
Key Features
- Precision 10-turn wirewound potentiometer
- Nominal resistance: 1 kΩ
- Power rating: 8 W at 40°C
- Single electrical section
- Approximately 46 mm body diameter
- Bushing-mount panel installation
- Approximately 1/4-inch stainless-steel shaft
- 3600-degree electrical rotation
- Standard resistance tolerance of ±3%
- Standard independent linearity of ±0.25%
- Suitable for compatible speed and voltage adjustment circuits
- Designed for industrial control applications
Product Identification
- Manufacturer: Vishay
- Brand: Vishay Spectrol
- Model: 860
- Ordering Designation: 860 B 1 1K BO10
- Product Type: Precision Wirewound Potentiometer
- Resistance: 1 kΩ
- Number of Turns: 10 Turns
- Number of Sections: 1
- Mounting Style: Bushing Mount
- Rated Power: 8 W at 40°C
- Nominal Diameter: 46 mm
- Typical Application: Speed Adjustment and Voltage Adjustment
Manufacturer Technical Information
For official dimensions, electrical limits, mechanical specifications, environmental ratings and ordering information, refer to the Vishay Spectrol Model 860 product page and technical datasheet.
The Vishay Spectrol 860 1K Potentiometer provides a dependable solution for accurate multi-turn adjustment in compatible generator panels, SCR control panels and other industrial electrical systems.
View the official Vishay Spectrol Model 860 product page for the manufacturer’s datasheet, dimensions, electrical specifications, mounting information and ordering details.
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