EXW Singapore — collect or forward from our Singapore office.

3G Electric
GENERAC RTSW400A3 Automatic Transfer Switch, 400A, 120/240V, Aluminum Enclosure - Automatic Transfer Switches
GENERACAutomatic Transfer Switches

GENERAC RTSW400A3 Automatic Transfer Switch, 400A, 120/240V, Aluminum Enclosure

The GENERAC Automatic Transfer Switch is a single-phase, 400 A service-rated transfer switch (MPN RTSW400A3) from the RTS series. It features an aluminum enclosure and is rated for 120/240V AC operation. This switch…

SKU 3G-OTH-371151

Brand
GENERAC
Item
RTSW400A3 Automatic Transfer Switch, 400A, 120/240V, Aluminum Enclosure
Part Number
RTSW400A3
Category
Automatic Transfer Switches
Available to Order
Also known as:RTSW400A3GENERAC
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
EXW Singapore
Collect or forward from our office
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

GENERAC
Manufacturer Part Number
RTSW400A3
Lockable
No
Rated Voltage
120/240V AC
Current Rating
400 A
Enclosure Material
Aluminum
Compatible with Series
RTS

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The GENERAC Automatic Transfer Switch is a single-phase, 400 A service-rated transfer switch (MPN RTSW400A3) from the RTS series. It features an aluminum enclosure and is rated for 120/240V AC operation. This switch is designed for automatic power transfer in standby generator applications.

Frequently Asked Questions

What is the GENERAC RTSW400A3 automatic transfer switch used for?

The GENERAC RTSW400A3 is a 400 A service-rated transfer switch for single-phase standby generator systems. It automatically transfers power from utility to generator during an outage, ensuring continuous operation for critical loads in commercial or industrial facilities.

What are the specifications of the GENERAC RTSW400A3 transfer switch?

The GENERAC RTSW400A3 is a single-phase, 400 A service-rated transfer switch rated for 120/240V AC. It features an aluminum enclosure, is part of the RTS series, and is not lockable. It is designed for automatic power transfer in generator applications.

Where to buy the GENERAC RTSW400A3 transfer switch worldwide?

3G Electric supplies the GENERAC RTSW400A3 transfer switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this service-rated transfer switch.

How to install a GENERAC RTSW400A3 automatic transfer switch?

Installation of the GENERAC RTSW400A3 must be performed by a licensed electrician following local codes and the manufacturer's manual. The switch connects between the utility meter and main panel. Ensure the generator is properly sized and the 120/240V AC supply is disconnected before work.

Used in

Common applications for GENERAC
Commercial facilities — Generac three-phase diesel generators (e.g., RD05033JDAE) for standby power during outages.
Industrial plants — Generac 277/480V generators (e.g., RD05033KDAE) for critical process backup.
Residential homes — Generac single-phase 120/240V generators (e.g., RD02025ADAE) for automatic standby power.
Data centers — Generac diesel generators with transfer switches for redundant power supply.
Healthcare facilities — Generac CARB-compliant generators (e.g., RA03022ADAE) for emergency power.
Telecommunications — Generac standby generators for remote site power backup.
Not sure this is the right part? Photo-identify it→

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

More from GENERAC

View all GENERAC parts →

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first