Cummins RA150 150A Service-Entrance Automatic Transfer Switch
OEM part
dealer
support
At a glance
- Product Type
- Automatic Transfer Switch (model RA1512S3 / RA150 SE) — not a generator
- Amperage
- 150 A
- Poles
- 2-pole
- Voltage
- 120/240 VAC, 60 Hz
- Phase
- Single phase
- Service Entrance Rated
- Yes (SE version; uses UL 489 listed circuit breaker)
- Enclosure
- NEMA Type 3R, aluminum (indoor/outdoor)
- Withstand Rating
- 10 kA
- Transition
- Open transition (break-before-make)
- Dimensions
- 13.4 x 26 x 30.2 in
- Weight
- 51 lbs
- Listings
- UL 1008 and CSA C22.5
- Warranty
- 2-Year Limited, including Parts & Labor
- OEM Part Number
- A066V485 (Cummins/Onan RA1512S3)
Not sure if this fits?
Why this generator
- 150-amp service-entrance-rated automatic transfer switch — eliminates the need for a separate main service disconnect
- Rugged NEMA Type 3R aluminum enclosure rated for outdoor installation, resisting rain, snow, and dust
- Listed to UL 1008 and CSA C22.5, the safety standard for transfer switches
- Solenoid-driven mechanism with silver-alloy contacts and mechanical interlock for reliable, break-before-make switching
- Purpose-built to pair with Cummins Quiet Connect RS-series home standby generators for fast, simplified installation
- Fully automatic operation: monitors utility power 24/7, starts the generator on outage, and returns load to utility when stable
Everything you need to know
150A, 240Vac, 2-Pole, NEMA 3R enclosure, Service Entrance Rated. (For Cummins Connect Series Generators Only)
Highlights
- Factory-authorized Cummins dealer
- MAP pricing — no hidden markup
- Whole-home standby coverage
- Expert sizing & installation available across NC & SC
Part Number: A066V485
Ships via calculated freight — shipping shown at checkout (heavy/hazmat item).
Frequently asked questions
Is this a genuine OEM part?+
Yes — sold and shipped as a genuine Cummins part from a factory-authorized dealer.
Will it fit my unit?+
Check your model and year — message us with that info and we'll confirm fit before you order.
How fast does it ship?+
Low cost ground shipping — calculated at checkout (batteries, transfer switches and oversized items). Most leave the warehouse in 2–4 business days.
What's the return policy?+
30-day returns on unused parts and accessories in original packaging.
Fast nationwide shipping
Low cost ground shipping — calculated at checkout. Typically ships in less than 2 weeks.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Genuine Cummins part
Sold and shipped as a genuine Cummins OEM part from a factory-authorized dealer. 30-day returns on unused parts in original packaging.