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SQUARE D NEMA Combination Starter: Circuit Breaker, 3 Poles, NEMA Size 0 - Circuit Breaker Starters with Thermal Overloads
SQUARE DCircuit Breaker Starters with Thermal Overloads

SQUARE D NEMA Combination Starter: Circuit Breaker, 3 Poles, NEMA Size 0

The SQUARE D NEMA Combination Starter: Circuit Breaker (SKU 8539SBA53V02S, MPN 8539SBA53V02S) is a three-phase, 3-pole circuit breaker starter with thermal overloads from the Series 8539. It is NEMA Size 0…

SKU 3G-OTH-44306

Brand
SQUARE D
Item
NEMA Combination Starter: Circuit Breaker, 3 Poles, NEMA Size 0
Category
Circuit Breaker Starters with Thermal Overloads
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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.

Technical Specifications

SQUARE D
Manufacturer Part Number
8539SBA53V02S
Series
8539
Type
NEMA Size 0, NEMA-Rated 12
AC
120V
Phase
Three
Poles
3
Poles/Phase
3 Pole / Three Phase
Coil Voltage
120V AC
Operator Type
No Operator
Control Transformer
No
Includes Pilot Light
No
Maximum Voltage Rating
600V AC
Thermal Units Required
3 Melting Alloy Units (Not Included)
Includes Auxiliary Contacts
No

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

Product Description

The SQUARE D NEMA Combination Starter: Circuit Breaker (SKU 8539SBA53V02S, MPN 8539SBA53V02S) is a three-phase, 3-pole circuit breaker starter with thermal overloads from the Series 8539. It is NEMA Size 0, NEMA-Rated 12, with a maximum voltage rating of 600V AC and a coil voltage of 120V AC. This unit requires 3 melting alloy thermal units (not included) and does not include a control transformer, pilot light, operator, or auxiliary contacts.

Frequently Asked Questions

What is the SQUARE D 8539SBA53V02S combination starter used for?

The SQUARE D 8539SBA53V02S NEMA combination starter is used to safely start and stop three-phase motors while providing circuit breaker protection and thermal overload protection. It is suitable for industrial applications requiring a NEMA Size 0 starter in a NEMA-Rated 12 enclosure, with a maximum voltage rating of 600V AC.

What are the specifications of the SQUARE D 8539SBA53V02S combination starter?

The SQUARE D 8539SBA53V02S is a three-phase, 3-pole NEMA Size 0 combination starter with a NEMA-Rated 12 enclosure. It has a coil voltage of 120V AC, a maximum voltage rating of 600V AC, and requires 3 melting alloy thermal units (not included). It does not include a control transformer, pilot light, operator, or auxiliary contacts.

Where to buy the SQUARE D 8539SBA53V02S combination starter worldwide?

3G Electric supplies the SQUARE D 8539SBA53V02S combination starter to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this NEMA Size 0 starter from the Series 8539.

How to select thermal units for the SQUARE D 8539SBA53V02S starter?

To select thermal units for the SQUARE D 8539SBA53V02S combination starter, refer to the motor full-load current and ambient temperature. This NEMA Size 0 starter requires 3 melting alloy thermal units (not included). Use SQUARE D selection tables to match the correct thermal unit part number to your motor's current rating for proper overload protection.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE D Products

3G Electric supplies SQUARE D circuit breaker starters with thermal overloads. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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