Bourns PER401-P122-N0015 Incremental Ring Encoder

Introduction

The Bourns PER401-P122-N0015 is a compact, low-profile incremental rotary encoder designed for reliable user input and position control. Its ring-style design, tactile detent feedback, and standard PCB-mount format make it well suited to space-conscious electronic interfaces.

Part Description

The PER401-P122-N0015 belongs to Bourns' PER40 family of rotary encoders. It is a 22 mm low-profile incremental ring encoder that produces two-phase quadrature output signals. Quadrature signals allow a connected controller to determine both the amount and direction of rotational movement.

The encoder provides 15 pulses per full 360° rotation and includes haptic detents, giving users noticeable tactile feedback as the ring is turned. It supports continuous 360° rotation rather than being limited by mechanical end stops.

Key characteristics include:

• 22 mm low-profile ring encoder format
• Incremental two-phase quadrature output
• 15 pulses per revolution
• Haptic detent feedback
• Continuous 360° rotation
• Standardized PCB-mount construction
• IP40 ingress-protection rating
• Operating temperature range of -40°C to +85°C

Applications

Potential applications for the PER401-P122-N0015 include:

• Menu navigation controls
• Volume and audio level adjustment
• User-interface selector knobs
• Display parameter adjustment
• Instrument configuration controls
• Portable electronic device interfaces
• Automotive cabin control panels
• Industrial machine control interfaces
• Smart appliance control panels
• Test and measurement equipment

Industries

This encoder can be used across a range of industries, including:

• Consumer electronics
• Automotive electronics
• Industrial automation
• Medical equipment
• Telecommunications
• Professional audio equipment
• Test and measurement
• Home appliances
• Building automation
• IoT and connected-device development

Usage Ideas

1. Digital Audio Controller
   Use the encoder as a volume and menu-navigation control for a compact amplifier, mixer, or music player. The detents provide a more deliberate and tactile adjustment experience.

2. Industrial HMI Selector
   Integrate the encoder into a small human-machine interface for selecting operating modes, adjusting timing values, or changing process setpoints.

3. Smart Thermostat Interface
   Pair the rotary ring with a microcontroller and display to create a temperature-setting control with clockwise and counterclockwise adjustment.

Conclusion

The Bourns PER401-P122-N0015 is a versatile low-profile incremental ring encoder for applications requiring dependable rotary input in a compact PCB-mounted package. With quadrature output, 15 pulses per revolution, tactile detents, continuous rotation, and broad temperature capability, it is a practical interface component for consumer, industrial, automotive, and instrumentation designs.