3RU1146-4JBO
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$539.99
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The Siemens 3RU1146-4JB0 is a factory-grade thermal overload relay designed to provide reliable motor protection in industrial automation and control systems. Part of the Siemens SIRIUS family, this overload relay offers precise protection against motor overloads, phase failures, and phase asymmetry. It features a size S3 frame, Class 10 trip characteristic, and an adjustable current range from 45 to 63 amps, making it suitable for a variety of medium-power motor applications. The device supports screw terminal connections and is engineered for contactor mounting, ensuring easy integration into existing panels and machinery. Built with industry standards certifications, including CE, UL, and ATEX, the 3RU1146-4JB0 combines durability and consistent performance in demanding environments, with an operating temperature range of -20 to +70°C and finger-safe protection for added operator safety. This relay is essential for anyone looking to enhance motor control system longevity and reduce downtime effectively.
Key Features of Siemens 3RU1146-4JB0
- Adjustable pick-up current range from 45 to 63 A for flexible motor protection
- Class 10 trip characteristic for inverse time delay overload protection
- 1 normally closed (NC) and 1 normally open (NO) auxiliary contact for external signaling
- Manual, automatic, and remote reset options for versatile operation
- Screw terminal connections for simple installation and secure wiring
- Contactor mounting compatibility with Siemens contactors (3RT1044, 3RT1045, 3RT1046)
- Protection class IP20 on the front for finger-safe operation
- Wide operating temperature range from -20 to +70 °C
- Certified to major international standards including CE, UL, ATEX, IECEx
- Robust construction with a compact size (120 mm H x 70 mm W x 140 mm D)
Technical Specs of 3RU1146-4JB0
Explore Siemens 3RU1146-4JB0 technical data for detailed parameters to ensure system compatibility.
| Specification | Details |
|---|---|
| Frame Size | S3 |
| Trip Class | Class 10 |
| Adjustable Current | 45 to 63 A |
| Auxiliary Contacts | 1 NO + 1 NC |
| Operating Voltage | Up to 1000 VAC |
| Connection Type | Screw Terminals |
| Protection IP Rating | IP20 (front) |
| Operating Temperature | -20 to +70 °C |
| Dimensions (HxWxD) | 120 x 70 x 140 mm |
Applications / Use Case
This Siemens 3RU1146-4JB0 is commonly used in industrial automation systems worldwide. It is ideal for protecting three-phase motors in production line systems, machine automation, factory control panels, and process control environments. Its reliable overload and phase failure protection help improve the longevity of motors and reduce unexpected downtime, making it suitable for applications requiring precise motor safeguarding. The device’s versatile reset options and easy installation further support maintenance-friendly environments and enhance operational uptime in manufacturing, conveyor belt setups, and other automated industrial machinery.
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