1. Core Series
• XB2-B (22 mm, metal bezel)
– Economical, modular contact blocks (silver or gold contacts).
– IP65 standard; with protective boot up to IP66.
• XB4-B (22 mm, metal)
– Rugged die-cast head, oil- and impact-resistant for heavy industry.
• XB5-A (22 mm, plastic)
– Lightweight, cost-effective for OEM and building automation.
• XA2-E (22 mm, plastic, mid-range)
– Integrated LED indicator, dual-voltage AC 220 V / DC 24 V options.
• ZB5 / ZB4 (22 mm modular metal line)
– Snap-in heads for key switches, selector switches, E-stop, latching modules—tool-free assembly.
2. Typical Heads & Functions
• Flush push-button – spring-return (start/stop).
• Illuminated push-button – built-in LED for RUN/STOP status (red/green).
• Mushroom-head E-stop – red Ø40 mm, twist-to-release or pull-to-release, ISO 13850 compliant, 100 k mechanical cycles.
• Key selector switch – 2 or 3 positions, key removable in left, right, or center position.
• Latching module (ZB2BZ21C) – push-on / push-off for maintained operation.
3. Technical Highlights
• Terminations: screw, spring, or PCB pins; pull-out contact blocks, tool-free maintenance.
• Certifications: CE, CCC, UL, CSA, IEC 60947-5-1.
• Environment: –25 … +70 °C, 30 g shock, oil-dust-salt-spray resistant.
• Life: 1 million mechanical cycles, 50 k–100 k electrical cycles (load dependent).
4. Quick Application Guide
• Factory automation: XB2-B metal series + mushroom E-stop for machine tools, conveyors.
• Building & HVAC: XA2-E illuminated push-button, 220 V direct drive for clean panels.
• Food machinery: IP69K stainless-steel derivative (XB7 line) withstands high-pressure washdown.
• Outdoor panels: IP66 / NEMA 4 enclosure + UV-resistant plastics for sun and rain.
5. Selection Rule-of-Thumb
22 mm round hole → choose XB family.
Need key switch → add “BG” key head.
Need E-stop → choose “BS” mushroom head.
Need illumination → choose “BW” head + LED module.
Heavy-duty or oily → XB4 metal bezel.
Cost-sensitive → XB5 plastic.
Example Kits
• Green START: XB2BA31C (green flush) + ZB2BE101C (1 NO contact block)
• Red E-stop: XB2BS542C (Ø40 mm mushroom) + ZB2BE102C (1 NC contact block)
With modular design, extensive accessories and worldwide certifications, Schneider Harmony push-buttons cover virtually every industrial and commercial control-panel need.
