Siemens IP20 Key Switch, SPST 2-Way Flat-Key
- RS Stock No.:
- 874-1948
- Distrelec Article No.:
- 300-21-108
- Mfr. Part No.:
- 3SU1100-4BF11-1BA0
- Brand:
- Siemens
Subtotal (1 unit)*
£32.88
(exc. VAT)
£39.46
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 7 unit(s) ready to ship
- Plus 14 unit(s) ready to ship from another location
- Plus 13 unit(s) shipping from 20 March 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 + | £32.88 |
*price indicative
- RS Stock No.:
- 874-1948
- Distrelec Article No.:
- 300-21-108
- Mfr. Part No.:
- 3SU1100-4BF11-1BA0
- Brand:
- Siemens
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Siemens | |
| Number of Positions | 2 | |
| Product Type | Key Switch | |
| Switch Operation | Latching | |
| Contact Configuration | SPST | |
| Key Trapping | Yes | |
| Housing Material | Plastic | |
| IP Rating | IP20 | |
| Key Type | Flat | |
| Terminal Type | Screw | |
| Bezel Shape | Round | |
| Contact AC Voltage | 500V ac | |
| Contact DC Voltage | 500V dc | |
| Switch Configuration | SPST | |
| Key Index Angle | 90° | |
| Standards/Approvals | No | |
| Contact Material | Metal | |
| Minimum Operating Temperature | -25°C | |
| Mechanical Life | 1000000Cycles | |
| Maximum Operating Temperature | 70°C | |
| Series | SIRIUS ACT | |
| Select all | ||
|---|---|---|
Brand Siemens | ||
Number of Positions 2 | ||
Product Type Key Switch | ||
Switch Operation Latching | ||
Contact Configuration SPST | ||
Key Trapping Yes | ||
Housing Material Plastic | ||
IP Rating IP20 | ||
Key Type Flat | ||
Terminal Type Screw | ||
Bezel Shape Round | ||
Contact AC Voltage 500V ac | ||
Contact DC Voltage 500V dc | ||
Switch Configuration SPST | ||
Key Index Angle 90° | ||
Standards/Approvals No | ||
Contact Material Metal | ||
Minimum Operating Temperature -25°C | ||
Mechanical Life 1000000Cycles | ||
Maximum Operating Temperature 70°C | ||
Series SIRIUS ACT | ||
- 3SU11004BF111BA0 Data Sheet
- Siemens SIRIUS ACT - Commanding and Signalling Devices Catalogue (28MB)
- Find out more on DESIGNSPARK
- Manual - Command And Signaling Devices Sirius Act 3Su1 Pushbuttons And Signaling Devices
- Environmental Product Declaration - Overview
- Siemens EcoTech label
- Siemens EcoTech Profile
- Environmental Product Declaration
- COO (Country of Origin):
- DE
Siemens Key Switch, 2 Positions, Latching Type - SIRIUS ACT Series - 3SU1100-4BF11-1BA0
Lock down high-risk electronic systems with this key switch from Siemens. To complete or break the circuit, you rotate the key 90°, where it latches in position until you turn it back. It's a reliable choice for processes that need a high level of safety or security clearance. The unit only turns on and off with the key, so you can be confident it won't activate accidentally and can't be tampered with. You can use this kind of switch for fire alarms, data cabinets and fuse boxes on processing or assembly lines and large or heavy-duty machinery.
Features & Benefits
• IP20-rated housing protects the workings against dust and objects over 12mm, like wires or screws
• Wide operating temperature range between -25°C and +70 °C to withstand harsh conditions
• Mechanical switching life of 1,000,000 cycles ensures long-lasting use
• Screw terminals make it simple to wire and achieve vibration-proof connections
How do I mount this switch?
The unit slots neatly into a standard 22mm diameter opening in your panel. The two parts of the switch click together through the hole and you can securely tighten the screw from behind.