Push Button Switches
ALX-HB4-BG03 Three Position Key Selector Switch | 22mm
22 mm three position key selector switch, key operated, 2 NO contacts, maintained and key-reset versions, zinc alloy chrome bezel, screw terminals, 600 V AC 10 A.
The HB4-BG03 is the three position key selector: left, centre and right, turned with a key rather than a knob. Two normally-open contacts are carried, one for each outer position, which makes it the usual switch for a key-protected forward / off / reverse or hand / off / auto selection.
Technical Specifications
Item | Specification |
Mounting hole | 22 mm (22.3 mm cutout) |
Bezel / head material | Zinc alloy, chrome plated |
Contact housing | Plastic |
Contact configuration | 2 NO |
Operation | Three position, key operated, maintained or key reset |
Actuator | Key barrel with removable key, 22 mm |
Actuator colour | Black |
Illumination | None |
Rated voltage / current | 600 V AC, 10 A (AC-15 duty) as marked on the contact block |
Termination | Screw terminals |
Positions | 3 (left / centre / right) |
Key | Removable; keyed-alike sets available |
BG03, BG33 and BG53 are the maintained versions; BG73 is the key-reset version. All carry 2 NO contacts, one per outer position.
Design Features
- Three positions with a key-operated barrel, so the selected mode cannot be changed without the key
- Two normally-open contacts, one switched in each outer position
- Centre position detent gives a repeatable off state between the two operating positions
- Chrome-plated zinc alloy bezel with anti-rotation collar, sized to the standard 22 mm cutout
- Contact blocks clip on separately, so the contact combination can be changed without a new bezel
Model Options
Model | Action | Contact |
HB4-BG03 | Maintained (stay put) | 2 NO |
HB4-BG33 | Maintained (stay put) | 2 NO |
HB4-BG53 | Maintained (stay put) | 2 NO |
HB4-BG73 | Key reset | 2 NO |
Two position key selector: HB4-BG21 group. Knob version of this switch: HB4-BD33.
Applications
Key-protected forward / off / reverse selection, maintenance mode selection and two-speed motor control on panels where the mode must be controlled by authorised staff.