Cummins OTEC125 Automatic Transfer Switch
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At a glance
- Amperage
- 125 A
- Poles
- 4-Pole (switched neutral)
- Voltage
- 120/208V
- Phase
- 3-Phase, 60 Hz
- Service Entrance Rated
- No
- Enclosure
- NEMA 1 (indoor)
- Control
- PowerCommand 40-11 microprocessor control with LCD display
- Transition Type
- Open transition (break-before-make)
- Listing
- UL 1008 listed
- Warranty
- 1-Year Limited Warranty
Why this generator
- 125-amp, 4-pole automatic transfer switch rated for 120/208V 3-phase, 60 Hz standby and emergency power applications
- PowerCommand 40-11 microprocessor control with LCD display for monitoring, voltage imbalance sensing, and phase rotation detection
- Open-transition (break-before-make) operation with heavy-duty silver alloy contacts and multi-leaf arc chutes rated for 100% load interruption
- UL 1008 listed contact assemblies built for high-endurance switching over the life of the switch
- NEMA 1 indoor enclosure for clean, dry installation environments
- Backed by a Cummins 1-Year Limited Warranty
Everything you need to know
Cummins OTEC125 — 125 Amp automatic transfer switch with LCD display, open transition, and configurable exerciser scheduler. Choose voltage, phase, and enclosure rating below.
- 125A, 3-Pole
- NEMA 1 (indoor) or NEMA 3R (outdoor) enclosure
- 208V or 480V, 3-Phase
- Open transition
- LCD display + configurable exerciser
- Non Service Entrance Rated
Factory-authorized Cummins dealer MAP pricing. 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.