Omron Roller Lever Safety Limit Switch Replacement for D4B-3A13N

Robust industrial limit switch with adjustable roller lever designed for elevator safety, door control, slack detection, and auxiliary limit functions where Omron D4B-3A13N was originally specified.

The lever switch is part of Omron’s D4B series of safety and limit switches. It features a rugged metal housing and an adjustable roller lever actuator suitable for precise mechanical actuation in heavy-use environments. Rated for reliable performance in industrial and elevator applications, this limit switch provides dependable contact operation through a broad temperature range and long life expectancy. Its fully enclosed IP67-rated design guards against dust and moisture exposure, making it suitable for machine rooms, shafts, and control panels. 

Key Features & Attributes:

• Adjustable roller lever actuator for flexible actuation geometry.
• Dual normally-closed contact configuration (2NC) for safety and limit functions.
• Rated for up to 10 A AC switching and durable mechanical design.
• Operating temperature range: -40 °C to +80 °C to support wide environmental conditions.
• Long mechanical life (≈10 million cycles) and electrical life (~500,000 cycles).
• IP67 ingress protection for dust tightness and water resistance.
• Metal housing suitable for industrial duty.

This is a direct candidate when modernizing or repairing safety and limit circuits on elevator door mechanisms and other actuated systems that originally used an obsolete Omron D4B-3A13N configuration. Its adjustable actuator and robust electrical ratings make it suitable for varied mechanical linkages while maintaining reliable performance in repeated cycling.

Installation should be done by qualified elevator technicians to ensure correct mechanical alignment and compliance with applicable safety standards.