The OT25F4N1 isolator switch is a four-pole disconnect device designed for safe isolation of electrical circuits. It is part of the OT series, which covers a current range from 16 to 160 A, and is suitable for use in 25 A applications within that series. Key benefits and features - Safe circuit isolation: provides reliable disconnection of all circuits in the protected path to enable maintenance, testing, or repair with reduced risk of energizing the circuit. - Simultaneous four-pole operation: a 4-pole design ensures all conductors can be isolated together, improving protection and ease of use. - OT series compatibility: engineered to integrate with other OT series components and panels that operate within the 16–160 A range, helping maintain consistent performance and wiring practices. - Clear product identification: model OT25F4N1 with internal reference 10136476 and order number 1SCA105055R1001 for accurate sourcing and replacement. Specifications at a glance - Function: isolator switch - Series: OT - Current rating: 25 A - Poles: 4 - OT series current range: 16–160 A - Product model: OT25F4N1 - Internal reference number: 10136476 - Product number / order code: 1SCA105055R1001 Use scenarios - Industrial control panels: install as a maintenance disconnect for 25 A circuits controlling motors, actuators, or sensors within an automation cabinet. - Building automation and HVAC systems: deploy in distribution panels to safely disconnect 25 A circuits feeding fans, pumps, or controls. - Lab benches and test rigs: use as a reliable power cut-off to safely power down circuits during setup, testing, or troubleshooting. Why choose this device - It provides a robust and straightforward means to isolate power in multi-conductor installations. - Its four-pole design simplifies wiring and improves safety by ensuring all poles can be disconnected together. - It remains compatible with other OT series components, enabling consistent installation practices across panels and systems. This description preserves the brand, model, and explicit specifications while presenting clear benefits, practical applications, and concise technical details to support informed purchasing decisions.