Siemens 3SE5 Safety Interlock Switch, 2NC/1NO, Keyed Actuator Included, Plastic

The SIRIUS 3SE5 position switches are designed to ensure that the safety mechanism on protective doors cannot be deactivated. Also the multiple mechanical coding of these interlock switches virtually eliminates the possibility of tampering. The separate actuator is mounted directly on the protective door and moves into the opening on the switch when the door is closed. Once the door is opened, the actuator is removed from the switch and the NC contacts open breaking the circuit safely and reliably.

5 directions of approach, from above and 4 x 90°
IP67 degree of protection
Protection up to Cat 4 (EN 954-1), Up to SIL 3 IEC 62061
Simple, fast wiring offers approx 20 to 25% reduction in connection time
ASIsafe electronics are now integrated into the enclosure for additional space saving
LED versions available for on-site diagnosis
Slow action contacts
Screw terminals

Actuators must be purchased separately.

This safety interlock switch is intended to improve safety in automation and mechanical applications, offering robust protection across various environments and ensuring operational consistency during crucial tasks. It is relevant to users in the electrical and mechanical sectors, helping them meet safety standards and operational needs.

• Keyed lock design enhances security
• Enables installation flexibility with multiple directions of approach
• IP65 rating offers protection against dust and water ingress
• Operates effectively within a wide temperature range
• Features slow-action contacts to minimise the risk of accidental activations
• Includes auxiliary contacts for extended circuit options

• Ensures safety compliance in industrial machinery
• Used for machine guarding in automated production lines
• Suitable for maintenance tasks requiring isolation
• Ideal for safety integration in control panels and cabinets

The maximum operating temperature is +85°C, ensuring functionality under heat stress.

Yes, it can be mounted in any orientation, providing installation flexibility.

It accommodates solid and finely stranded conductors of specified cross-sections.

This product achieves a typical mechanical service life of up to 1,000,000 cycles.

Yes, a separate actuator is required, which must be ordered separately.

Interlock Switch