Siemens 3RT2037-1KB40 65A Power Contactor — 30kW @ 400V, 24V DC Coil
Siemens 3RT2037-1KB40 Power Contactor
The Siemens 3RT2037-1KB40 is a 3-pole power contactor designed for AC-3e/AC-3 applications, rated for 65A and 30kW at 400V. This S2 size contactor features a 24V DC coil, making it highly suitable for direct control by PLCs and other low-voltage DC control systems. It includes an integrated varistor for surge protection, 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, and screw terminals for secure connections. The coil operates within a range of 0.8-1.2 times the rated control circuit voltage (Uc).
This contactor is a critical component in automated industrial processes, motor control centers, and building automation systems where precise DC control is required. It is ideal for applications involving motor starting, power switching, and system control in manufacturing, material handling, and infrastructure projects.
Stanlo Automation, your veteran-owned source for surplus industrial automation parts, provides the Siemens 3RT2037-1KB40. We offer reliable and cost-effective solutions to keep your operations running smoothly, backed by expert service.
| Type | Power Contactor |
| Manufacturer | Siemens |
| Part Number | 3RT2037-1KB40 |
| AC-3e/AC-3 Rating | 65 A |
| Power @ 400V | 30 kW |
| Poles | 3 |
| Coil Voltage | 24 V DC |
| Control Voltage Range | 0.8-1.2 Uc |
| Auxiliary Contacts | 1 NO + 1 NC |
| Terminal Type | Screw |
| Size | S2 |
| Features | Integrated varistor, Suitable for PLC outputs |