Cummins RA150 150A Service-Entrance Automatic Transfer Switch
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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)
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?+
Shipping is 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
Shipping calculated at checkout. Most items leave the warehouse in 2–4 business days.
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.