Custom Generator-Mounted Circuit Breakers
Factory-fit. Breaker-ready. Built for your generator.
At IEP, our GMCB Series is purpose-built to replace factory-installed generator breakers with custom, enclosure-mounted breaker solutions. These panels are mounted directly to the generator head, matched in paint and form factor to your unit, and are available in a wide range of amperages, breaker styles, and trip types.
Whether you’re upgrading to higher capacity, adding redundancy, or simplifying maintenance — we engineer generator breakers that are fully integrated, compliant, and ready to bolt on.
Quick-View Specification Table
Spec | Details |
Amperage Range | 100A – 5000A |
Voltage Rating | Up to 600V AC |
Mounting | Direct to generator head |
Breaker Options | 1–3 custom breakers per cabinet |
Compatibility | Generator-specific configurations |
Compliance | UL 891 construction available |
General Specifications
- Replaces factory-installed breaker on OEM generator sets
- Brand-specific cabinet mounts directly to genset housing
- Paint matched to manufacturer’s generator finish
- Available with 1–3 molded case or power breakers
- Options for adjustable trip types, pole configurations
- Built-in protective enclosure duplicates factory dimensions
- Fully tested and labeled — ready to operate upon installation
Technical Specifications
- Rated up to 600V AC, 100–5000A
- Breaker types: UL 489 MCCBs, or UL 1066 power breakers
- Built-in protective barriers and arc safety compliance
- Available in 3P or 4P configurations
- Bolt-on integration with OEM generator mounting kits
- Fully labeled with UV-printed nameplates and connection details
CUSTOMIZATION OPTIONS
Whether retrofitting a unit or outfitting new builds, our generator-mounted breakers are configurable to match exact technical and spatial constraints.
- Matched to generator brand/paint color
- Steel, aluminum, or stainless-steel enclosure
- Indoor and outdoor (NEMA 1 or 3R) options
Breaker Configuration
- 1 to 3 breaker setups
- Fixed or adjustable trip settings
- Breaker coordination options for downstream protection
- Line/load lug or bus connection types
Optional Accessories
- Cam-Lok® cable sets (color-coded, male/female)
- Combination MTS + Cam-Lok® for quick connect/disconnect
- Testing kits for on-site maintenance
- Surge protection, monitoring, or signal relay options
CERTIFICATIONS & COMPLIANCE
✅ UL 891 Construction – low-voltage breaker integration
✅ Built to generator-specific factory dimensions
✅ OEM-matched paint and mechanical mounting
✅ Made in USA – engineered, fabricated, and tested in-house
✅ Ships with breaker diagrams, trip settings, torque specs
FEATURES & BENEFITS
- Mounts directly to the generator housing — zero footprint added
- Custom trip configurations per your load profile
- Paint-matched enclosures for OEM visual consistency
- Eliminates reliance on factory-installed breakers
- Options for redundant breakers or specialized output settings
- Durable and inspector-ready with UL-built construction
- Fully documented, labeled, and factory-tested
INDUSTRY APPLICATIONS
Ideal for industries needing custom power control directly at the generator head:
- Data Centers – Replace OEM breakers with custom-coordinated trip settings
- Manufacturing – Higher ampacity for large load demand
- Healthcare Facilities – Compliant and ready for inspection
- Power Rental & Utilities – Site-ready swap for field service
- Government / Military – Custom breaker pairing for load security