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SQUARE D Thermal Unit: 20 Trip Class, A.59 - Electrical
SQUAREElectrical

SQUARE D Thermal Unit: 20 Trip Class, A.59

SQUARE Electrical.

SKU 3G-OTH-39440

Also listed as: A59 · A 59 · A-59

Brand
SQUARE
Item
D Thermal Unit: 20 Trip Class, A.59
Category
Electrical
UNSPSC
39121029 — Isolation transformer
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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.

Technical Specifications

SQUARE
Manufacturer Part Number
A.59

Technical Documents

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SQUARE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

SQUARE Electrical.

Frequently Asked Questions

What is the SQUARE D Thermal Unit A.59 used for?

The SQUARE D Thermal Unit A.59 is an overload protection device used in motor starters and controllers. It protects motors from overheating by tripping the circuit when current exceeds a safe level, commonly applied in industrial machinery, conveyors, and HVAC systems.

What are the specifications of the SQUARE D Thermal Unit A.59?

The SQUARE D Thermal Unit A.59 has a trip class of 20 and is identified by manufacturer part number A.59. It is designed for use with SQUARE D motor starters to provide precise thermal overload protection in electrical control panels.

Where to buy SQUARE D Thermal Unit A.59 worldwide?

3G Electric supplies the SQUARE D Thermal Unit A.59 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this genuine SQUARE D part to your facility, no matter the location.

How to select the correct SQUARE D thermal unit for a motor starter?

To select the correct SQUARE D thermal unit, match the motor full-load current (FLA) to the unit's trip range. The A.59 is a Class 20 unit, suitable for standard motor starting. Always consult the motor nameplate and starter catalog for proper sizing.

Used in

Common applications for SQUARE
Industrial power distribution — Square D HU362AWC non-fusible safety switch for disconnecting three-phase loads up to 60 A.
Busway branch circuits — Square D PQ4203G fusible bus plug for overcurrent protection in I-Line busway systems.
Panelboard surge protection — Square D HL4IMA24C SPD for transient voltage suppression in 277/480V AC wye systems.
Power distribution in control panels — Square D 9080LBA263106 open distribution block for splitting 400 kcmil conductors.
Machine control stations — Square D 9001BG303 push-button station for open/close/stop operations in industrial machinery.
Motor starting and protection — Square D 8536SBG2V02H30S NEMA starter for non-reversing three-phase motor control up to 18 A.

SQUARE 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.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
HUBBELL Receptacle: Quad, 5-20, Brown, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420)
HUBBELL
HUBBELL Receptacle: Quad, 5-20, Brown, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420)
HUBBELL Receptacle: Quad, 5-20, Ivory, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420IS)
HUBBELL
HUBBELL Receptacle: Quad, 5-20, Ivory, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420IS)
HUBBELL Receptacle: Quad, 5-15, Brown, 125V AC, 15 A, 2 Pole / 3 Wire (MPN HBL415)
HUBBELL
HUBBELL Receptacle: Quad, 5-15, Brown, 125V AC, 15 A, 2 Pole / 3 Wire (MPN HBL415)
HUBBELL Receptacle: Quad, 5-20, Ivory, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420I)
HUBBELL
HUBBELL Receptacle: Quad, 5-20, Ivory, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420I)
HUBBELL Receptacle: Quad, 5-20, Blue, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420S)
HUBBELL
HUBBELL Receptacle: Quad, 5-20, Blue, 125V AC, 20 A, 2 Pole / 3 Wire (MPN HBL420S)
HUBBELL Receptacle: Duplex, 5-20, White, 125V AC, 20 A, 2 Pole / 3 Wire (MPN BR20STWTR)
HUBBELL
HUBBELL Receptacle: Duplex, 5-20, White, 125V AC, 20 A, 2 Pole / 3 Wire (MPN BR20STWTR)

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