3SE5242-0BK21

With a rocker arm length of 20.8mm and a roller diameter of 19mm, it can detect a wide range of rotating cam or mechanism movements. It features 1NO/1NC soft-close contacts with forced disconnection function, and a rated current of up to 10A, making it suitable for limit detection in medium to heavy-duty mechanisms.

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Siemens SIRIUS 3SE5242-0BK21 Roller Rocker Arm Position Switch Product Image

Product Positioning

The Siemens SIRIUS 3SE5242-0BK21 is a 50mm plastic-cased roller rocker position switch. It uses a 19mm plastic roller and a 20.8mm rocker arm to detect the position of the rotating mechanism, making it suitable for medium to heavy-duty automation applications.

Core Product Advantages and Features

Long rocker arm and roller design

The 20.8mm rocker arm, paired with 19mm plastic rollers, can cover a wide range of rotary cam motion.

1NO/1NC slow action contact

The slow-moving contact has a forced disconnection function and stable signal output, making it suitable for safety interlocking applications.

10A rated current

With a rated contact current of up to 10A, it can directly drive control circuits with larger loads.

IP66/IP67 protection rating

It has excellent dust and water resistance, making it suitable for outdoor areas or places with a lot of dust and moisture.

project	Specification
Actuator type	Roller rocker arm, rocker arm length 20.8mm, roller Ø19mm
Contact configuration	1 NO / 1 NC Soft-close contact with forced disconnection
Enclosure protection rating	IP66 / IP67
Shell material/width	Plastic casing, 50mm wide
Wiring method	2 x M20 x 1.5 cable connectors
Rated current	10A

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