Siemens 3RB1253-0FM00 Discontinued Overload Relay

The Siemens 3RB1253-0FM00 is a discontinued overload relay designed for full motor protection, covering a current range of 50 to 205 A with an adjustable class from 5 to 30. It supports continuous mounting on contactors or individual mounting, featuring busbar connections for the main circuit and screw terminals for the auxiliary circuit. This model includes manual, automatic, and remote reset options, along with standard functions like monostable outputs and ground fault signaling.

Although discontinued, this relay was used in robust industrial applications requiring precise motor protection, including ground fault detection and remote operational control. Its wide adjustable class range allowed for fine-tuning protection settings for various motor types and applications.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RB1253-0FM00. We provide a source for hard-to-find and discontinued components, ensuring you can maintain your existing systems with genuine surplus parts.