- Full Name : Vishay / Sfernice Manufacturer
- Site : www.vishay.com
Vishay / Sfernice produces fixed and variable resistors in most of the existing technologies. With its wide range and its capability to manufacture standard as well as custom designed products, Vishay / Sfernice covers applications in all market sectors. Included in their product line are encoders, potentiometers, power resistors, resistor networks and arrays, SMD, and thin film resistors.
VISHAY SFERNICEThe Sfernice name has been well known throughout Europe and beyond for many years. Today, Vishay Sfernice products include resistors, variable resistors, and motion transducers. They include both standard and custom-designed components, and are used in a wide variety of applications in many market sectors.
Vishay Sfernice products include fixed resistors in wirewound, metal film, thick film, and thin film technologies, as well as a significant range of variable resistors. The variable product range is extensive and encompasses variable resistors and motion transducers, many of which are approved to CECC/UTE/NF or MIL specifications. Cermet and conductive plastic technologies are deployed, and single- or multi-turn styles are offered. The range of motion transducers includes single-turn, rotational, and linear, and these products are used in military, aerospace, automotive, off-road, medical, measurement, robotics, nuclear, and general industrial applications. For applications in harsh environments requiring a very long life and a great number of cycles, our product line-up includes a family of non-contacting devices using Hall effect technology.
Vishay Sfernice long-life panel potentiometers, offering lifetimes from 500,000 to 2 million cycles, increase reliability in critical applications, reduce the need for replacement parts, and lower maintenance costs. Vishay Sfernice also offers a wide range of power thick film resistors that can be mounted on heatsinks or PCBs. Their available power dissipation ranges from 5 W to upwards of 800 W. These products typically exhibit a high power-to-volume/weight ratio, no inductance, low tolerance, wide ohmic range, and high overload capabilities. High-reliability components are a key feature of the Vishay Sfernice product line. Techniques developed to manufacture these components are jointly evaluated by the National Space Study Center (CNES) and ESA/SCC. The devices undergo stringent testing both during and after manufacturing.
Potentiometers are variable resistors that are commonly used for all applications involving a reasonable number of cycles (few tens of thousands, manually actuated). Mounted behind the front panel for various equipment, they frequently feature buttons mounted on their shafts. Typical applications include: setting the light or the brightness of a screen, turning the volume for an audio application, setting the speed on tool machining equipment, or various parameters for industrial remote controls.
Typical markets include:
Off-road tractors, excavators, cranes
Avionic : overrhead panels
Medical : syringe pumps
Industrial : various parameters to be set up on machines.
Key parameters defining a panel potentiometer:
Resistive element material: depending on the application could be cermet of conductive plastic
Overall dimensions, dependent on the available space for the application
Sealing level: dependent on customers' constraints
Lifespan requested directly related to the application
Variation laws: a few are available (please refer to datasheets)
Admissible power: wide-range function of the potentiometer model
Other common options: detents (torque increase in determined position) / switches: rotary or push-push / mutiple resistive modules (multi-gang potentiometers) / custom shafts and bushings/ inner and outer shafts actuating different resistive modules
In summary Vishay offers a very versatile family of products with a wide range of potential options.
Vishay's discrete resistors serve applications in virtually all major market sectors. Resistive technology options include thin film, thick film, metal oxide film, carbon film and wirewound, as well as Power Metal Strip?. Vishay is the number one manufacturer worldwide of wirewound and other power resistors, leaded film resistors, and thick film surface-mount resistors.
Rheostats offer the advantages of their variable resistors with higher available power ratings. Vishay rheostats can be used in a range of applications, including rugged, demanding ones.
Liquid Level Sensors
Capacitive Touch Sensors
Magnetic Sensors Current Sensors
Motion & Position Sensors
Optical Sensors Sensor
Hardware & Accessories Environmental Sensors
Power & Control Sensor
ICs Temperature Sensors Flow Sensors
Vibration & Tilt Sensors
Daily recommended electronic parts
RH Range: 0 % to 100 %
RH Accuracy: +/- 3 %
Mounting Style: SMD/SMT
Output Type: Digital
Interface Type: I2C
Full Temp Accuracy: +/- 0.3 C
Operating Supply Current: 800 uA
Supply Voltage - Min: 2.4 V
Supply Voltage - Max: 5.5 V
Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 125 C
Packaging: Cut Tape
Description/Function: Humidity and temperature sensor