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Siemens 3SB3921-0AK 3SB3 Yellow Protective Collar for Mushroom Pushbuttons
Manufacturer: Siemens
Condition: Brand New
Lead Time: In Stock
Origin: Germany
Warranty: 12 Months
Email: [email protected]
whatsApp: +86-18150117685
- Overview
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Overview
- Use the mushroom pushbutton version without a key-operated switch.
- Allow for the complete collar outline.
- Select the operator and contact assembly separately.
- Retain unobstructed access to the emergency-stop actuator.
3SB3921-0AK 3SB3 Yellow Protective Collar for Mushroom Pushbuttons
A yellow front-plate protective collar for a 3SB3 mushroom pushbutton without a key-operated switch, with no locking mechanism.
At a Glance
| Brand | Siemens |
|---|---|
| Model | 3SB3921-0AK |
| Product Type | Protective collar |
| Core Function | Guarding an emergency-stop actuator |
| Application | Round 22 mm 3SB3 operator assemblies |
Front-plate attachment
The collar mounts at the panel face around the selected mushroom actuator.
Defined panel limit
The maximum front-plate thickness is 4 mm.
Unkeyed arrangement
The no-lock design differs from the taller protective collar with a lock.
Product Overview
3SB3921-0AK surrounds the mushroom operator of a round 22 mm 3SB3 control assembly.
The yellow accessory is used with the plastic or metal operator program and attaches to the front plate while preserving access to the emergency-stop actuator.
Key Functions
Surround the mushroom actuator
The collar provides a protective surround at the emergency-stop operating point.
Mount directly on the front plate
The attachment is intended for a front plate with a thickness of up to 4 mm.
Retain the non-locking arrangement
This version has no lock and is distinct from the lock-equipped collar.
Official Specifications
| Collar color | Yellow |
|---|---|
| Lock mechanism | Not fitted |
| Mounting arrangement | Front plate |
| Maximum front-plate thickness | 4 mm |
| External dimensions (W × H × D) | 78 × 50.5 × 73.5 mm |
| Net accessory weight | Approximately 65 g |
Frequently Asked Questions
Can 3SB3921-0AK be mounted on a 5 mm front plate?
No, the maximum permitted front-plate thickness is 4 mm.
Does 3SB3921-0AK include a lock for securing the actuator?
No, this protective collar is the version without a lock.
Can I select 3SB3921-0AK for a key-operated mushroom switch?
No, this article is intended for the mushroom pushbutton without a key-operated switch.
Will 3SB3921-0AK fit both plastic and metal round 3SB3 operator programs?
Yes, the accessory belongs to the round 22 mm plastic and metal operator program.
How much space should I leave around 3SB3921-0AK on the panel face?
Allow for the 78 mm width and 73.5 mm depth of the collar outline.
Is 3SB3921-0AK attached to the front plate or to a rear contact block?
The collar is attached to the front plate.
Can I use 3SB3921-0AK as a complete emergency-stop switch on its own?
No, the collar is an accessory for the mushroom pushbutton assembly.
