509-BOD - Allen Bradley Magnetic Starter

509-BOD - Allen Bradley Magnetic Starter

The Allen-Bradley 509-BOD is the kind of motor starter you install and don’t have to think about again—which, honestly, is exactly what most people want.

It’s a NEMA Size 1 direct-on-line starter, so there’s nothing complicated going on here. It starts your motor the way it should, every time. Where it really proves its value is in protection. The eutectic overload relay is temperature compensated, so it reacts the way it should even when ambient conditions change—not something every starter handles well.

You’ve also got short-circuit protection built in, plus the option to use it in emergency stop circuits, which makes it a solid fit for real-world industrial setups—not just ideal conditions on paper.

From an installation standpoint, it’s straightforward. Standard screw terminals, rail mounting, and wire ranges that don’t force you to fight the hardware. And once it’s in place, the external reset is there when you need it—no digging around or unnecessary downtime.

The contacts are silver alloy, which matters more than people think. That’s what helps it hold up over time, especially in applications where the starter is cycling regularly.

With a 27A continuous rating and support for up to 7.5 HP at 230V (3-phase), it lands right in that sweet spot for a lot of common industrial equipment—pumps, conveyors, HVAC units, and similar loads.

Key Features and Benefits

• Simple, reliable DOL motor starting—no unnecessary complexity
• Temperature-compensated overload protection helps prevent motor damage
• Built-in short-circuit protection for added safety
• External reset keeps recovery quick and easy
• Long mechanical life (up to 10 million operations)
• Rail-mountable with standard screw connections
• Silver alloy contacts for consistent performance over time
• Corrosion-resistant components designed for industrial environments

Technical Specifications

• Catalog Number: 509-BOD
• Manufacturer: Allen-Bradley
• Starter Type: Direct Online Starter (DOL)
• NEMA Size: Size 1
• Continuous Current: 27 A
• Service Limit Current: 32 A
• Control Voltage: 110V (50 Hz) / 120V (60 Hz) AC
• Horsepower Rating: 7.5 HP @ 230V, 3-phase
• Max Inrush Current: 288 A
• Overload Relay: Eutectic alloy, temperature compensated
• Auxiliary Contacts: 1 NO (expandable up to 8)
• Connection Type: Screw terminals
• Wire Size: 14–8 AWG
• Mounting: Rail mounting supported
• Operating Temperature: Up to 65°C
• Mechanical Life: 10 million operations
• Enclosure: Open type

Material Compliance and Certifications

• Built to NEMA standards
• Meets IEC 60947-4-3 Class 2 coordination
• Corrosion-resistant treated metal components
• Silver and silver alloy contact materials for reliable conductivity

Where It Works Best

• This starter fits into a lot of everyday industrial applications without any fuss:
• Pumps and fluid systems
• Conveyor lines
• HVAC equipment
• General manufacturing machinery
• Anywhere you need dependable motor starting with built-in protection