LAY5-BS542 Industrial Emergency Stop Push Button

The LAY5-BS542 is a heavy-duty, panel-mounted electromechanical emergency stop (E-stop) push button engineered to serve as a critical safety interlock within machine automation systems and industrial control panel networks. Featuring a highly visible, 40mm red mushroom head, this latching switch is designed to immediately cut control circuit power when depressed, stopping dangerous machinery during an emergency. Built for standard 22mm cutout mounting holes, it incorporates a dependable turn-to-release mechanical trigger system alongside configurable contact blocks, ensuring reliable protection and compliance with standard safety operating protocols.

Key Features

Fool-Proof Mechanical Latching: Automatically latches into the open/off safety state when pressed; it can only be reset by a deliberate turn-to-release (twist-release) motion, preventing accidental or premature machine restarts.
High-Visibility Ergonomic Profile: Outfitted with a large, vibrant red mushroom cap contrasted against a crisp yellow legend plate ring to guarantee instant operator identification under high-stress emergency conditions.
Modular Snap-On Contacts: Equipped with interchangeable electrical contact blocks (typically configured with at least one Normally Closed (NC) positive-opening contact path) that screw firmly into the base collar.
Standard 22mm Form Factor: Tailored to mount seamlessly into standard $\emptyset\ 22\text{ mm}$ panel cutouts, making it a universally compatible component for updating existing industrial enclosures or building new control consoles.
Rugged Control Panel Seal: Constructed from durable, impact-resistant composite materials with an integrated rubber sealing washer to maintain dust-tight and splash-proof panel integrity.

Technical Specifications

Feature	Specification
Model / Part Number	LAY5-BS542 (LAY5 Series)
Product Type	Mushroom Head Emergency Stop Push Button Switch
Actuator Action	Latching / Trigger Action (Turn-to-Release / Twist-to-Reset)
Mushroom Diameter	40 mm
Mounting Cutout Diameter	$\emptyset\ 22\text{ mm}$ standard panel bore
Contact Block Default	1 NC (Normally Closed) / Configurable to multi-pole configurations
Thermal Current rating ( $I_{th}$ )	10 A
Operational Voltage max ( $U_e$ )	600 V AC / DC max control circuit loop capacity
Terminal Connection Type	Captive screw clamp terminals with pressure plates
Standards & Certifications	IEC/EN 60947-5-1, CE Marked, RoHS Compliant

Applications

Machine Tool Safety Interlocks: Serving as the primary manual emergency cut-off switch on CNC mills, metal lathes, industrial drills, and wood processing saws.
Conveyor & Material Handling Lines: Installed at regular intervals along active warehouse sorting belts to allow quick access for operators to halt transport lines instantly.
Central Control Desks & Subpanels: Acting as the master hardware safety button on centralized factory floor PLC control panels and distribution boards.
Packaging and Bottling Plants: Providing immediate process line tripping to prevent machinery collisions, mechanical jams, or operator injury during material feed faults.