Overview
The Eaton Cutler-Hammer DG321URB is a general duty non-fusible safety switch engineered for reliable manual disconnection of power in residential, commercial, and light industrial applications. This 3-pole, 3-wire switch is rated for 30A at 240V AC and features a NEMA 3R painted galvanized steel enclosure for rainproof, outdoor-rated protection. As a non-fusible disconnect, it provides manual load break and load make control without integrated overcurrent protection, making it ideal for applications where a separate fused disconnect is not required.
Key Features
- 100% load break and 100% load make rated for reliable circuit disconnection
- NEMA 3R rainproof enclosure with painted galvanized steel construction for outdoor durability
- Non-fusible design—no fuses to replace or maintain
- Horsepower rated (7.5 HP at 240V, 3-phase)
- Single-throw configuration (3NO contact form) for simple on/off control
- Surface mount with ample wire bending space for fast installation
Technical Specifications
- Manufacturer: Eaton (Cutler-Hammer Division)
- Series: DG (General Duty)
- Rated Current: 30A AC
- Rated Voltage: 240V AC
- Poles: 3-pole
- Wires: 3-wire
- Horsepower: 7.5 HP @ 240V, 3-phase
- Contact Form: 3NO (3-pole normally open, single-throw)
- Fuse Type: Non-fusible
- Enclosure Rating: NEMA 3R (rainproof, outdoor)
- Enclosure Material: Painted galvanized steel
- Dimensions (L × W × H): 6.38 × 6.88 × 10.81 inches (162 × 174.8 × 271.5 mm)
- Weight: 6 lbs
- Mounting: Surface mount, panel or wall
- Approvals: UL Listed
Typical Applications
The DG321URB is suited for:
- Residential and commercial power distribution and control circuits
- Light-duty motor circuits and branch circuits
- Service entrance disconnects (where local code permits non-fusible disconnects)
- Outdoor control stations and exposed locations (NEMA 3R rating)
- Any general-duty application requiring manual load-break switching without fuse protection
Compatibility & Replacements
Compatible With
- Single-phase and 3-phase 240V AC power systems
- Motor circuits up to 7.5 HP (3-phase, 240V)
- Standard electrical conduit and wire bending spaces (¾–2 AWG wire entries)
- NEMA 3R outdoor enclosures and weatherproof installations
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The DG321URB is the standard part number in the DG general duty non-fusible series for 30A, 240V, 3-pole applications. Other 30A disconnect switches in the DG series may be substituted if NEMA rating and voltage match.
Works With
- Eaton/Cutler-Hammer control systems and distribution products
- Motor starters and soft starters (downstream of disconnect)
- Fused disconnect switches and fusible panelboards (in series, if required)
- Standard industrial electrical installations and control circuits
