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Siemens 52BJK (auxiliary block) 

  • Water and Oil Tight 
  • 3 Positions
  • Short Lever
  • Maintained Operation
  • C Cam
  • 1NO + 1NC Contact Blocks


The Siemens 52BJK Auxiliary Block is an integral component designed to complement the functionality of heavy-duty selector switch units, enhancing their capabilities in industrial environments. Here's a detailed breakdown of its features:

  • Water and Oil Tight: Similar to the primary selector switch unit, the auxiliary block is engineered to withstand exposure to water and oil. This feature ensures the reliability and integrity of the auxiliary block in harsh environmental conditions, offering durability and consistent performance.

  • 3 Positions: Aligned with the primary selector switch unit, the auxiliary block supports three switch positions. It synchronizes with the main unit to provide additional functionalities or expand the range of operations available, allowing for versatile control options.

  • Short Lever: Like the primary switch, the auxiliary block might also feature a short lever design, allowing for convenient manual operation while maintaining a compact form factor. This design facilitates easy handling and operation within limited spaces.

  • Maintained Operation: The maintained operation capability in the auxiliary block allows it to retain the selected state or position, ensuring stability in settings where specific modes or configurations need to be maintained without continuous manual adjustment.

  • C Cam: Similar to the primary selector switch unit, the auxiliary block's C Cam configuration determines its operational sequence or configuration within the three available positions. This ensures synchronization and compatibility with the main unit's functionality.

  • Contact Blocks: The auxiliary block, like the primary unit, typically includes one normally open (1NO) and one normally closed (1NC) contact blocks. These contacts allow for additional control or signaling of electrical circuits based on the selected switch position, enabling diverse applications and circuit configurations.

The Siemens 52BJK Auxiliary Block is designed to seamlessly integrate with the heavy-duty selector switch unit, enhancing its capabilities and expanding the range of control options. With shared features such as water and oil-tight construction, multiple positions, maintained operation, and contact blocks, the auxiliary block complements the primary unit, offering versatile and reliable control functionalities in demanding industrial settings.

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    For any inquiries, or questions, please call: 714-258-7000 or fill out the following form.

    Curley Wholesale Electric, Inc

    1211 Ritchey Street
    Santa Ana, CA 92705

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