SQUARE D Thermal Unit: 20 Trip Class, A1.39
SQUARE Electrical.
SKU 3G-OTH-41844
Also listed as: A139 · A1 39 · A1-39
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
SQUARE Electrical.
Frequently Asked Questions
What is a SQUARE D thermal unit A1.39 used for?
The SQUARE D thermal unit A1.39 is a trip class 20 overload relay 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 equipment across manufacturing and process industries.
What are the specifications of the SQUARE D thermal unit A1.39?
The SQUARE D thermal unit A1.39 has manufacturer part number A1.39 and is rated for trip class 20, meaning it provides delayed tripping for moderate overloads. It is designed for use with SQUARE D motor starters and overload relays. For exact current range and compatibility, consult the product datasheet.
Where to buy SQUARE D thermal unit A1.39 worldwide?
3G Electric supplies the SQUARE D thermal unit A1.39 to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other electrical protection components.
How to select the correct SQUARE D thermal unit for a motor?
Select the SQUARE D thermal unit based on the motor's full-load current (FLC) and trip class required. The A1.39 is a class 20 unit, suitable for standard motor starting. Match the unit's current range to the motor nameplate amps, and verify compatibility with your SQUARE D overload relay model.
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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.
