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GENERAC Automatic Transfer Switch: Three Phase, 400 A Current Rating, 120/240V AC - Automatic Transfer Switches
GENERACAutomatic Transfer Switches

GENERAC Automatic Transfer Switch: Three Phase, 400 A Current Rating, 120/240V AC

The GENERAC Automatic Transfer Switch: Three Phase (SKU RTSN400J3, MPN RTSN400J3) is a 400 A, 60,000 W max watt automatic transfer switch with a rated voltage of 120/240V AC. It features a steel enclosure, is not…

SKU 3G-OTH-371150

Brand
GENERAC
Item
Automatic Transfer Switch: Three Phase, 400 A Current Rating, 120/240V AC
Category
Automatic Transfer Switches
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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

GENERAC
Manufacturer Part Number
RTSN400J3
AC
120/240V
Lockable
No
Max Watt
60,000 W
Rated Voltage
120/240V AC
Current Rating
400 A
Enclosure Material
Steel
Compatible with Series
RTS
Service Rated Transfer Switch
No

Technical Documents

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

Product Description

The GENERAC Automatic Transfer Switch: Three Phase (SKU RTSN400J3, MPN RTSN400J3) is a 400 A, 60,000 W max watt automatic transfer switch with a rated voltage of 120/240V AC. It features a steel enclosure, is not lockable, and is compatible with the RTS series. This unit is not service rated.

Frequently Asked Questions

What is the GENERAC RTSN400J3 automatic transfer switch used for?

The GENERAC RTSN400J3 is a three-phase automatic transfer switch rated for 400 A and 60,000 W max watt at 120/240V AC. It automatically transfers power between utility and generator sources during outages, ensuring continuous operation for commercial and industrial facilities.

What are the specifications of the GENERAC RTSN400J3 transfer switch?

The GENERAC RTSN400J3 is a 400 A, three-phase automatic transfer switch with a rated voltage of 120/240V AC and 60,000 W max watt. It features a steel enclosure, is not lockable, and is compatible with the RTS series. This unit is not service rated.

Where to buy the GENERAC RTSN400J3 transfer switch worldwide?

3G Electric supplies the GENERAC RTSN400J3 automatic transfer switch worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the GENERAC RTSN400J3 automatic transfer switch?

Installation of the GENERAC RTSN400J3 must be performed by a licensed electrician following local codes and the manufacturer's manual. Ensure the steel enclosure is securely mounted, all connections are torqued to spec, and the unit is tested for proper transfer between utility and generator power.

Used in

Common applications for GENERAC
Backup power for commercial buildings — Generac automatic transfer switches (e.g., RTSN600G3) for seamless grid-to-generator transition
Portable power for construction sites — Generac conventional gasoline generator (MPN 7680) for temporary electrical supply
Cold-climate generator operation — Generac extreme cold weather kit (MPN 5618) for engine block heating in low temperatures
Generator battery maintenance in winter — Generac battery warmer (MPN 5633) to ensure reliable starting in cold environments
Generator connection to transfer switch — Generac power cord (MPN 6330) for linking portable generator to inlet box and transfer switch
Cosmetic maintenance of standby generators — Generac touch-up paint kit (MPN 5703) for air-cooled series generator enclosures

GENERAC Products

3G Electric supplies GENERAC automatic transfer switches. 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
SQUARE D Safety Switch: Non-Fusible, 100 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN DU323RB)
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SQUARE D Safety Switch: Non-Fusible, 100 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN DU323RB)
SQUARE D Safety Switch: Non-Fusible, 100 A, Three Phase, 240V AC, Galvanized Steel, Indoor (MPN DU323)
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SQUARE D Safety Switch: Non-Fusible, 100 A, Three Phase, 240V AC, Galvanized Steel, Indoor (MPN DU323)
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SQUARE D Safety Switch: Fusible, 600 A, Three Phase, 240V AC, Galvanized Steel, Indoor (MPN H326N)
SQUARE D Safety Switch: Non-Fusible, 60 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN DU322RB)
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SQUARE D Safety Switch: Non-Fusible, 60 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN DU322RB)
SQUARE D Safety Switch: Fusible, 400 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN H325NAWK)
SQUARE D
SQUARE D Safety Switch: Fusible, 400 A, Three Phase, 240V AC, Galvanized Steel, Indoor/Outdoor (MPN H325NAWK)
SCHNEIDER Safety Switch: Fusible, 200 A, Three Phase, 240V AC, Galvanized Steel, Indoor (MPN VH324N)
SCHNEIDER
SCHNEIDER Safety Switch: Fusible, 200 A, Three Phase, 240V AC, Galvanized Steel, Indoor (MPN VH324N)

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