Eaton EDB3225L – Molded Case Circuit Breaker, 225A, 3-Pole

The Eaton EDB3225L is a molded case circuit breaker (MCCB) from the EDB series, designed to provide reliable overcurrent and short-circuit protection in commercial and industrial power distribution systems. With a frame size of 225 A and three poles, it is suitable for protecting feeders, branch circuits, and equipment in panelboards, switchboards, and motor control centers.

Protection and Performance

The EDB3225L features a thermal-magnetic trip mechanism that combines a thermal element for overload protection and a magnetic element for short-circuit protection. The thermal element responds to sustained overcurrents with an inverse time characteristic, while the magnetic element trips instantaneously on high fault currents. This ensures coordinated protection and minimizes damage to downstream components.

Key Features

• Current Rating: 225 A continuous at 40°C ambient.

• Number of Poles: 3 poles for three-phase applications.

• Interrupting Capacity: Typically 25 kA at 480 V AC (specific values depend on voltage; consult data sheet).

• Voltage Rating: 600 V AC maximum.

• Compact Design: Space-saving dimensions allow high-density installation.

• Line/Load Reversibility: Suitable for reverse feed applications.

• Terminals: Standard line and load terminals accept copper or aluminum conductors.

• Certifications: UL 489, CSA C22.2 No. 5, and IEC 60947-2 compliant.

Technical Specifications

• Frame Type: EDB (225 A frame)

• Ampere Rating (In): 225 A

• Number of Poles: 3

• Interrupting Capacity: 25 kA at 480 V AC / 35 kA at 240 V AC (typical)

• Voltage Rating: 600 V AC, 250 V DC (derate appropriately)

• Frequency: 50/60 Hz

• Trip Type: Thermal-magnetic, fixed trip (non-interchangeable trip unit)

• Connection: Line and load terminals accept 1/0 AWG – 250 kcmil Cu/Al

• Mounting: Bolt-on or plug-in (depending on panelboard type)

• Operating Temperature: -20°C to +55°C

• Dimensions (WxHxD): 4.1 x 6.0 x 3.1 in (approx.)

Applications

The EDB3225L is commonly used in:

• Distribution panels and switchboards for commercial buildings

• Industrial control panels – protecting motors, transformers, and drives

• Infrastructure projects – water treatment plants, data centers

• Original equipment manufacturer (OEM) machinery

Installation and Maintenance

The breaker is designed for simple installation in Eaton panelboards or separately enclosed. It features a “VISI-TRIP” indicator that provides visual indication of a trip event, simplifying troubleshooting. Optional accessories include shunt trips, auxiliary switches, and undervoltage release modules.

Eaton’s EDB series breakers are known for their reliability and durability, backed by extensive testing and industry certifications. The EDB3225L ensures safe and continuous operation of electrical systems, reducing downtime and maintenance costs.