The PHR-04H with Plugin Rotary Encoders ROHS manufactured by SM Switch is a high-performance push button rotary encoder designed for a wide range of applications.The PHR-04H is a 4-position rotary switch with two detents, meaning it has four distinct operating positions. It is a RoHS compliant singlepole single throw (SPST) switch and can be operated up to 100,000 cycles. The PHR-04H is constructed from high-quality materials, making it resistant to dirt, dust, water, oil, and corrosion, and its contact resistance is low. Additionally, the PHR-04H has great tactile feedback and a shorter travel distance than traditional switches, making it easier and more accurate to operate. Its long-lasting and reliable design makes it ideal for a variety of commercial electrical and electronic applications.