Siemens 3TH2040-0BB4 Contactor 240VAC 10Amp W/Murrelektronik Surge Supressor

Industrial 4-pole control relay (contactor) designed for auxiliary and signal switching applications in automation systems. Comes with a Murrelektronik surge suppressor for added coil protection.

Contactor – Siemens 3TH2040-0BB4
Rated Operational Voltage: 600V AC
Rated Current: 10 Amps (AC-15 utilization category)
Contact Configuration: 4 Normally Open (4NO)
Control Voltage: 240V AC 50/60 Hz (as indicated by the -0BB4 suffix)
Standards: IEC 60947, VDE 0660, UL Listed, CSA Certified
Auxiliary Contact Rating: A600/Q600
Mounting: DIN rail or screw mount
Terminal Type: Screw clamp terminals
Application: Control panels, interlocks, signal circuits, lighting and small load control
Housing Width: Compact 45 mm frame
Surge Suppressor – Murrelektronik Type (Plug-on Module)
Function: Absorbs voltage spikes from coil de-energization
Voltage Rating: 240V AC (matched to coil)
Mounting: Snap-on coil terminals
Benefit: Protects PLC outputs or relays from electrical noise and prolongs contactor coil life
Use Case:
Perfect for industrial control circuits requiring clean, protected actuation of relays with multiple output contacts. Common in motor starters, lighting control systems, and machine automation panels. Please review pictures carefully and let us know if you have any questions!