Schneider Electric Harmony XB5 Series Key Release Emergency Stop Push Button, 22mm Cutout, IP66, IP67, IP69K

The Harmony XB5 range of plastic emergency push buttons offers easy & flexible installation. The unit itself is extremely robust, suitable for the majority of industrial applications. Ergonomically designed for easy operation. The XB5 push button offers easy panel mounting and improves the overall look and feel of your emergency stop control panel systems. Compact but prominent, the XB5 is at the forefront of machine safety. Ideal for areas that require resistance to chemicals and/or double electrical insulation.

• An instantaneous disconnect of your circuit upon alarm & activation of this emergency stop control unit
• Modular system, nearly all shapes and functions are compatible with each other (if you need to switch the push buttons head you can do so without changing the other parts)
• Conformity with IEC, UL, CSA standards - giving you the reassurance of reliability and safety in your industry
• IP65/66 (dust / damp proof, immersion protection)
• IP67 (dust tight, heavy seas protection)
• IP69K - suitable for heavy-duty cleaning (high-pressure washers - 7,000,000 Pa at 55°C, distance: 0.1 m)
• Low-load electrical contact (for greater efficiency & reassurance)
• NEMA rated 4X offering further reassurances against dust and corrosion.
• Schneider Green Premium guarantee (Environmentally friendly & sustainable with minimal hazardous substances used in the construction of the devices, allowing more options for end of life recycling)
• "Plug & Play" Clip together design (head, body, contact blocks)
• Anti-Loosing system for screw clamp terminals on contact blocks, preventing disconnects from the base unit
• The XB5 E-Stop button comes in varying sizes, including 22 mm cut out (compact in nature, but prominent in design and colour)

• Energy infrastructure industries
• Food and Beverage industries
• Water and Waste Water management systems
• Metal, Mining and Minerals industries
• Oil and Gas industries

The mechanical durability of ZB5AS944 is up to impressive 300000 cycles.
The ZB5AS944 provides the following standards:
•IP69 (rated as ’’high-pressure cleaning’’)
•IP67 (rated as "dust tight" and protected against immersion)
•IP66 (rated as "dust tight" and protected against heavy seas or powerful jets of water)
•IP69K (rated as ’’complete assurance ’’provides the highest protection rating on the scale)
The resistance to high pressure washer is at 55 °C, distance: 0.1 m.
The NEMA rating for this item is 4X, which means it is a subset of the NEMA 4 rating (protected against dust), but must provide additional protection against corrosion. Only enclosures fabricated from corrosion-resistant material, such as stainless steel and aluminium, can qualify for the NEMA 4X rating.
This item is classified as ’’ Green Premium Product ’’, which provides the following:
•Environmental information about the unit
•Minimal use of hazardous substances in, and beyond, compliance with regulations (RoHS, REACh)
•A promise of sustainable and environmentally friendly performance
•Product Environmental Profiles (PEPs) for easy carbon footprint calculation
•End-of-life instructions for reduced cost and optimised recycling
The cumulative tolerance must not exceed 0.3 mm / 0.012 in.: T1 + T2 = 0.3 mm max.

What is the different between a push button switch for an emergency stop and a general-purpose push button switch?