SQUARE D Thermal Unit: 20 Trip Class, B40.0
SQUARE Electrical.
SKU 3G-OTH-40521
Also listed as: B400 · B40 0 · B40-0
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
SQUARE Electrical.
Frequently Asked Questions
What is the SQUARE D B40.0 thermal unit used for?
The SQUARE D B40.0 thermal unit is an overload relay component used in motor starters to protect motors from overheating due to sustained overcurrent. It is commonly applied in industrial motor control panels, HVAC systems, and conveyor drives where reliable thermal protection is required.
What are the specifications of the SQUARE D B40.0 thermal unit?
The SQUARE D B40.0 thermal unit has a trip class of 20 and is designed for use with SQUARE D motor starters. Its manufacturer part number is B40.0. It provides thermal overload protection by sensing motor current and tripping the starter if current exceeds the rated threshold for a sustained period.
Where to buy SQUARE D B40.0 thermal units worldwide?
You can source the SQUARE D B40.0 thermal unit through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine SQUARE D components for motor protection applications.
How to select the correct SQUARE D thermal unit for a motor?
To select the correct SQUARE D thermal unit, match the unit's trip class and current rating to the motor's full-load amperage and starting characteristics. The B40.0 is a trip class 20 unit suitable for standard motor starts. Always consult the motor nameplate and SQUARE D selection tables to ensure proper overload protection.
Used in
Common applications for SQUARESQUARE Products
3G Electric supplies SQUARE electrical. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
