The Siemens 3SE3303-3C is a type of limit switch used in industrial applications. Here are some key points about it:

• Type: Slow-action contacts, make-before-break mechanism.

• Housing: Cast aluminum, suitable for extreme conditions.

• Contacts: Includes 1 Normally Open (NO) and 1 Normally Closed (NC) contact.

• Series: Part of the 3SE3 series, which is now obsolete and replaced by the 3SE2 series.

• Threading: Uses old metric PG13.5 threads, whereas the newer 3SE2 series uses M20 threads.

• Replacement: If needed, the operating head and contact block can be replaced while keeping the aluminum housing