Siemens 3SB3500-4AD01 22mm Metal RONIS Key Switch
Siemens 3SB3500-4AD01: 22mm metal RONIS key-operated switch.
The Siemens 3SB3500-4AD01 is a 22mm round metal actuator designed for key-operated switches with a RONIS lock mechanism. It features maintained contact operation across two switch positions (O-I) and comes with two keys. This unit allows for removal of the key in the 'O' position and is compatible with RONIS key switches SB31, 455, and 421. It is noted as a phased-out product, with the SIRIUS ACT 3SU1 series being its successor, recommended as 3SU1050-4BF01-0AA0 + 3SU1550-0AA10-0AA0.
This maintained key switch is typically used for secure operational control, such as enabling or disabling specific machine functions, system access control, or ensuring safety interlocks remain engaged until intentionally released by authorized personnel. Industries that utilize this include manufacturing, security systems, and control panel building.
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| Size | 22mm |
| Actuator Type | Key-Operated Switch |
| Lock Type | RONIS Lock (SB 30) |
| Positions | 2 (O-I) |
| Contact Type | Maintained |
| Keys | 2 |
| Key Removal | Position O |
| Holder | Included |
| Product Status | Phased-out |