BN18O EE Controls Bimetallic Overload

At 600 V (the standard Canadian distribution voltage for industrial motors), a 22–32 A overload range generally covers three-phase motors in the approximately 11–20 kW (15–25 hp) range, depending on motor efficiency class and full-load current. Always verify against the motor's nameplate full-load amperage and set the relay dial to match — contact us if you need help sizing for your application.

The BN18O is an EE Controls unit, and cross-compatibility with overloads from other manufacturers (e.g., Siemens, Eaton, or Schneider) depends on the mounting interface and contactor it pairs with. We recommend confirming your existing contactor brand and model before ordering a replacement. Our team specialises in matching obsolete and hard-to-find overload relays — send us your details and we'll identify a confirmed fit.

Bimetallic overload relays like the BN18O are typically adjusted via a front-mounted dial or knob calibrated across the rated current range (22–32 A on this unit). Set the dial to the motor's nameplate full-load amperage (FLA). For Canadian installations, this should be done in accordance with CSA C22.1 (Canadian Electrical Code) Part I, Section 28, which governs motor branch-circuit overload protection. If you need the product datasheet or wiring diagram, reach out to our team.