Marley Engineered Products BER-45202048000 2 Pole Limit Switch

Product Description

The MARLEY ENGINEERED PRODUCTS BER-45202048000 is a 2 pole limit switch designed for use in 900 Series B electric heating units. Limit switches are safety-critical components that interrupt the circuit when a unit reaches an unsafe operating temperature, protecting both the heater and the surrounding structure. This switch is a direct OEM-style replacement intended for installation by licensed HVAC technicians or qualified heating contractors working on commercial or residential electric unit heaters. Weighing 0.19 pounds, it is a compact component that fits within the control compartment of compatible units.

This limit switch is used in electric unit heaters commonly found in commercial spaces, garages, warehouses, and light industrial environments. It is a correct-fit replacement for the 900 Series B platform, covering a broad range of QMark and Berko unit heater models. Compatible units include models with varying wattage and voltage configurations across the CU900 and S900 series product lines.

Key Features

• 2 pole configuration interrupts both legs of the circuit for enhanced safety
• Designed for 900 Series B electric unit heaters
• Lightweight at 0.19 pounds for easy handling during service calls
• OEM-style replacement for Berko and QMark branded units
• Safety-critical thermal protection component

Compatibility

Compatible with the following units: QMark CU935, QMark CU945, QMark CU958, QMark CU968, QMark CU978, QMark S93505203FFB, QMark S94510203FFB, QMark S93505243FFB, QMark S94510243FFB, QMark S93505483FFB, QMark S94510483FFB, QMark S93505603FFB, QMark S94510603FFB, Berko CU935, Berko CU945, Berko CU958, Berko CU968, Berko CU978, Berko S93505203FFB, Berko S94510203FFB, Berko S93505243FFB, Berko S94510243FFB, Berko S93505483FFB, Berko S94510483FFB, Berko S93505603FFB, and Berko S94510603FFB.

Installation Notes

Installation should be performed by a licensed HVAC technician. Always disconnect and lock out power to the unit heater before accessing the control compartment or handling any internal components. Verify the replacement switch matches the original pole configuration and series designation before installation. Refer to the unit manufacturer's service documentation for proper mounting orientation and wiring termination procedures.

Technical Specifications

• Type: 2 Pole Limit Switch
• Series: 900 Series B
• Weight: 0.19 pounds

Standard Information

• Brand: MARLEY ENGINEERED PRODUCTS
• Manufacturer Part Number: BER-45202048000