Push Button Switches
ALX-HB4-BR42 Mushroom Head Push Button Switch | 22mm 60mm 1NC
22 mm mushroom head push button switch with 60 mm red cap and 1 NC contact, momentary spring return, zinc alloy chrome bezel, screw terminals, 600 V AC 10 A. Bulk OEM supply from ALUX.
The HB4-BR42 carries the largest cap in the HB4 range: a 60 mm mushroom on the standard 22 mm bezel. The extra diameter matters where the operator may be wearing heavy gloves, where the panel is reached across a machine, or where the stop function has to be found without looking. The contact is normally closed and opens when the cap is pressed.
Technical Specifications
Item | Specification |
Mounting hole | 22 mm (22.3 mm cutout) |
Bezel / head material | Zinc alloy, chrome plated |
Contact housing | Plastic |
Contact configuration | 1 NC |
Operation | Momentary, spring return |
Actuator | Mushroom head, 60 mm dia. |
Actuator colour | Red |
Illumination | None |
Rated voltage / current | 600 V AC, 10 A (AC-15 duty) as marked on the contact block |
Termination | Screw terminals |
60 mm cap on the same 22 mm bezel and cutout as the rest of the HB4 range, so the panel punch does not change when a larger target is specified.
Design Features
- 60 mm cap, the largest in the HB4 range, on the standard 22 mm mounting hole
- Normally-closed contact opens on pressure, so loss of the circuit or a pulled wire also stops the machine
- Chrome-plated zinc alloy bezel with a metal clamping ring: the switch stays square under repeated palm strikes
- Cap is a separate moulding, replaceable on its own if it is scuffed or cracked in service
- Screw-terminal contact block clips on from the rear and can be changed without removing the bezel
Model Options
Model | Cap diameter | Contact |
HB4-BR42 | 60 mm | 1 NC |
HB4-BR21 | 60 mm | 1 NO (black) |
HB4-BR31 | 60 mm | 1 NO (green) |
HB4-BR51 | 60 mm | 1 NO (yellow) |
Use the 60 mm group where the operator is gloved or the panel is at arm's length; the 40 mm HB4-BC group is the usual choice for a normal panel front.
Applications
Heavy machinery, hoists and cranes, concrete and aggregate plant, agricultural equipment and emergency-stop circuits on large control cabinets.