SQUARE B4.85 Thermal Unit
SQUARE Electrical.
SKU 3G-OTH-40814
Also listed as: B485 · B4 85 · B4-85
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Product Description
SQUARE Electrical.
Frequently Asked Questions
What is a Square D thermal unit B4.85 used for?
A Square D thermal unit B4.85 is an overload relay heater element used in motor starters to protect motors from overheating due to sustained overcurrent. It is commonly applied in industrial control panels, conveyors, pumps, and HVAC systems across manufacturing and process industries.
What are the specifications of the Square D thermal unit B4.85?
The Square D thermal unit B4.85 has manufacturer part number B4.85 and is rated for Class 20 trip protection. It is designed for use with Square D motor starters and provides accurate thermal overload sensing to prevent motor damage. Always verify compatibility with your starter model.
Where to buy Square D thermal unit B4.85 worldwide?
3G Electric supplies the Square D thermal unit B4.85 to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this overload relay heater element.
How to select the correct Square D thermal unit for a motor starter?
Select the Square D thermal unit based on the motor's full-load current (FLA) and ambient temperature. The B4.85 is a Class 20 trip element; match its ampere rating to the motor nameplate. Consult the starter manufacturer's selection table to ensure proper overload protection and avoid nuisance tripping.
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3G Electric supplies SQUARE electrical. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.