Description
The Siemens 3RU2136-4HB0 is a thermal overload relay engineered to provide dependable overcurrent and overload protection for three-phase motors and industrial control applications. With an adjustable current setting range of 40–50 amps, this relay is well suited for protecting motors in commercial HVAC systems, pumps, compressors, fans, and other motor-driven equipment where consistent protection is critical.
Product Overview
Designed as part of the Siemens 3RU2 series, the 3RU2136-4HB0 offers direct mounting compatibility with Siemens 3RT2 contactors in the S3 frame size, enabling a compact and integrated motor starter assembly. The relay monitors motor current continuously and trips the circuit when sustained overload conditions are detected, helping to prevent costly motor damage and unplanned downtime.
Key Features
- Adjustable trip current range: 40–50 amps
- Thermal overload protection for three-phase motor applications
- Direct mounting to Siemens 3RT2 series S3 contactors
- Manual and automatic reset modes
- Phase failure sensitivity for added motor protection
- Integrated test and reset button
- Auxiliary contacts included for control circuit integration
- Compact design for panel space efficiency
Applications
- Commercial and industrial HVAC motor starters
- Pump and compressor motor protection
- Fan and blower motor control panels
- Three-phase motor control centers (MCCs)
- Industrial automation and building automation systems
Why Choose the Siemens 3RU2136-4HB0
Siemens 3RU2 series overload relays are recognized for their robust construction, reliable trip characteristics, and seamless integration within the Siemens SIRIUS modular control system. The 3RU2136-4HB0 is an ideal choice for contractors and engineers seeking a proven, code-compliant overload protection solution that installs quickly and performs consistently in demanding environments.
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