IN Brief:
- The RAIK045I MP combines 16-bit resolution with repeatability of at least 14 bits.
- Its inductive sensing principle is intended to support operation close to motors where external magnetic fields can disturb magnetic encoders.
- Vishay specifies 10,000rpm operation, a -40°C to 125°C temperature range, and immediate production availability.
Vishay Intertechnology has introduced a 45mm absolute inductive kit encoder for industrial position sensing, combining 16-bit resolution, repeatability of at least 14 bits, and rotation speeds up to 10,000rpm in a 6.6mm-thick assembly.
The RAIK045I MP uses inductive rather than magnetic sensing, allowing Vishay to position the device for operation close to electric motors and other equipment where strong external magnetic fields can disturb conventional magnetic position sensors.
Its absolute accuracy is specified at at least 10 bits, equivalent to 0.35°, while output resolution reaches 16 bits. Those figures describe different aspects of sensor performance: resolution defines the smallest reported position increment, absolute accuracy describes how closely that result corresponds to the true shaft position, and repeatability measures whether the sensor returns to the same reading after repeated movement.
That distinction matters in servo systems. A controller may benefit from fine positional resolution while depending even more heavily on repeatability when a mechanism has to return to a previously defined location over thousands of cycles. Vishay identifies robotics, motor drives, conveyor systems, and automated guided vehicles among the intended applications.
Other cited uses include agricultural and off-road machinery, pitch and yaw control in wind turbines, cleaning robots, solar actuators, medical equipment, drones, and other systems where a compact non-contact sensor has to operate around electromechanical loads.
The encoder uses an off-axis arrangement suitable for hollow-shaft mounting. Its 45mm diameter is combined with a thickness of 6.6mm and a total mass of approximately 13g, including a 4.3g rotor. Reducing rotor mass limits the additional inertia introduced into smaller motion systems, where acceleration and rapid reversals can make the mechanical burden of sensing hardware relevant to control performance.
The thin kit format also gives designers more flexibility than a conventional enclosed encoder where the available axial space is limited. Integration still depends on maintaining mechanical alignment between the rotor and sensing electronics, particularly in machines exposed to shock, vibration, shaft movement, or thermal expansion.
Vishay specifies operation from -40°C to 125°C and a useful electrical angle of 360°. The upper temperature limit is particularly relevant to installations close to motors, where windings, bearings, power electronics, and enclosure conditions can produce local temperatures well above ambient.
The company also cites resistance to moisture, airborne contamination, vibration, mechanical shock, and temperature variation. Inductive sensing removes the need for an optical path that can be obscured by contamination and avoids reliance on a permanent magnetic field, although the complete encoder assembly, cabling, connector system, and mechanical mounting still have to suit the final environment.
An SPI output is provided as standard, with sine and cosine outputs available on request. SPI gives embedded controllers a straightforward digital position interface, while analogue Sin/Cos outputs can support applications where interpolation or signal processing is performed elsewhere in the control electronics.
At the 10,000rpm maximum speed, the interface and control system also have to acquire position quickly enough for the intended loop bandwidth. Mechanical speed alone does not guarantee servo performance; latency, update rate, filtering, processor timing, and actuator dynamics all influence the accuracy of the finished system.
Vishay describes the RAIK045I MP as a medium-precision, cost-effective alternative to higher-performance encoder solutions. That avoids overstating its scope: applications demanding tighter absolute accuracy, safety-certified feedback, multi-turn position retention, or specialised deterministic interfaces may require a different sensing architecture.
Samples and production quantities are available now with a stated lead time of 16 weeks. The primary release is dated 8 September 2026, correcting the 9 September date used during the initial sourcing scan. With production availability already established, the design decision now centres on whether the encoder’s combination of magnetic-field immunity, geometry, accuracy, and operating range matches the machine rather than on a future launch timetable.
