Eaton Official Product Article: DH368FGK 1200A Heavy-Duty Fusible Safety Switch
1. Product Overview
The Eaton DH368FGK is a large-frame, enhanced-visible-blade single-throw heavy-duty fusible safety switch engineered for high-current commercial and industrial power isolation. This UL-listed disconnect delivers reliable overcurrent protection and a visible circuit break for 1200A three-phase power systems at up to 600V AC.
Designed with a painted steel NEMA 1 indoor enclosure, this 3-pole, 3-wire unit accepts Class L fuses and ships in a fusible-without-neutral configuration. It supports service entrance capability when paired with an optional neutral kit, making it ideal for main distribution isolation, heavy machinery feeders, and facility power disconnect points where clear blade visibility and robust load-break performance are mandatory.
Built to Eaton’s DH Series heavy-duty standard, the DH368FGK features a mechanically interlocked enclosure door that prevents access to live components while the switch is in the ON position, complying with global electrical safety codes including UL 98 and NEC requirements. All visible blade construction lets technicians visually confirm open/closed circuit status without test tools for enhanced lockout-tagout (LOTO) safety.
Compliance & Warranty
Certification: UL Listed
Warranty Term: 1 year from installation OR 18 months from factory shipment (whichever occurs first, per Eaton Selling Policy 25-000)
Catalog Note: Suitable for service entrance installation with a separate neutral kit accessory installed
2. Full Official Model Spec Breakdown (Per DH368FGK Datasheet)
Core Electrical Ratings
| Parameter | Official Specification |
| Catalog Number | DH368FGK |
| UPC Code | 782114312919 |
| Current Rating | 1200 Amps |
| Voltage Rating | 600 V AC, 250 V DC |
| Pole Configuration | 3-Pole, 3-Wire (Fusible Without Neutral) |
| Fuse Class Compatibility | Class L |
| Conductor Capacity | (4)#1/0 up to (4)750 kcmil Aluminum cables |
| Switch Type | Single-throw enhanced visible blade heavy-duty fusible disconnect |
3. Key Industrial Safety & Design Features
3.1 Visible Blade Disconnect Technology
Full visible blade design provides instant visual confirmation of circuit isolation for lockout/tagout procedures. No guesswork on power status; maintenance crews can verify open contacts before servicing downstream equipment to eliminate shock hazards. The single-throw rotary mechanism offers smooth, full 1200A load-make and load-break capability for repeated daily switching cycles.
3.2 NEMA 1 Painted Steel Indoor Enclosure
Robust, thick painted steel cabinet shields internal switch components from dust and light airborne contaminants in dry indoor electrical rooms, commercial facilities, and factory control areas. Sealed door gaskets reduce internal dust accumulation, extending fuse and contact service life. NEMA 1 rating restricts deployment to fully enclosed dry indoor environments only.
3.3 Class L Large Fuse Compatibility
Engineered exclusively for Class L high-current fuses, the DH368FGK accommodates full 1200A short-circuit and overload protection for large distribution feeders, HVAC central plants, industrial process equipment, and facility main service panels. The fusible-without-neutral base design simplifies three-phase power layouts where a neutral bus is not required on the disconnect unit.
3.4 Interlocked Safety Door Mechanism
Eaton’s patented mechanical door interlock blocks cabinet opening while the switch handle is locked in the ON position, preventing accidental contact with energized bus bars and fuse clips. A controlled defeater function is included for authorized, qualified electricians to access internal components only when required for emergency troubleshooting.
3.5 High-Current Wiring Flexibility
Terminal lugs support four parallel conductors ranging from #1/0 to 750 kcmil aluminum wire, catering to oversized industrial feeder cables common in large manufacturing plants, data center main power, and commercial building central distribution systems. Ample internal wiring clearance reduces cable strain and simplifies code-compliant routing.
3.6 Service Entrance Ready (Accessory Dependent
When equipped with an optional factory neutral kit, the DH368FGK meets NEC service entrance standards, allowing installation as the primary building disconnect at utility meter termination points for large commercial and light industrial sites.
4. Standard Package Contents
1 × DH368FGK 1200A 3P Class L fusible safety switch assembly
Integrated visible blade single-throw switching mechanism
Painted steel NEMA 1 surface-mount enclosure
Factory-installed Class L fuse mounting hardware
Printed dimensional and wiring specification cut sheet
Full UL certification documentation packet
5. Typical Application Scenarios
Large commercial building main service disconnect (with neutral kit accessory)
Industrial factory 3-phase heavy machinery feeder isolation
Central HVAC and chiller plant main power shutoff
Warehouse and distribution facility primary power distribution panels
Data center auxiliary high-current branch circuit disconnects.
Water treatment plant large pump and motor control isolation
Institutional facilities (hospitals, universities) main electrical room distribution
Eaton DH368FGK 1200A Fused Disconnect NEMA 1
Eaton NGH312038E Circuit Breaker 1200A 600VAC 3 POLE
Eaton NGH312038E Circuit Breaker 1200A 600VAC 3 POLE
EATON TR06CX8X-9390 9390 ON-SITE OPT TRN 8-HOUR CLASS
Eaton XTCEC10N22A XT IEC Contactor DILM100/22(RA2 50) 1000A 3Pole FVNR 110-250VAC
Eaton AKK14804 Valves
Eaton Waveguide Beam Guide Implant 138052
PXM6051A1BB Eaton Comm. Exp. I/O Cards Meter PXM6000 --SA
EATON CORPORATION EBMC1FB WT50EHD34 623 / EBMC1FBWT50EHD 34623 (BRAND NEW)
EATON CORPORATION ZM15206O / ZM15206O (BRAND NEW)
EATON CORPORATION EVLL11LCBX30/U NV1 / EVLL11LCBX30UN V1 (BRAND NEW)
EATON CORPORATION EBMC1FB WT50EHD34 623 / EBMC1FBWT50EHD 34623 (BRAND NEW)
EATON CORPORATION ZM15201O / ZM15201O (BRAND NEW)
