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Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC, Adjustable Current 5.5 to 8 A, 8A Contact Rating, 3 kW, 3P 3RU2116-1HB0
Specifications
| Country of Origin | Germany |
|---|---|
| Brand | Siemens |
| Length | 76mm |
| Model | 3RU2116-1HB0 |
| Depth | 70mm |
| IP Rating | IP65, IP55 |
| Width | 45mm |
| Mount Type | Direct |
| Series | SIRIUS 3RU2 |
| Power Rating | 3kW |
| Maximum Operating Temperature | 70°C |
| Minimum Operating Temperature | -40°C |
| Terminal type | Screw |
| Standards/Approvals | UKCA, IEC, CCC, WEEE (2012/19/EU), RoHS, UL, EAC, CE, REACH |
| Contact Voltage | 690V ac |
| Reset Method | Automatic & Manual |
| Normal State Configuration | 1 NO/1 NC |
| Relay Contact Current | 8A |
| Number of Auxiliary Contacts | 2 |
| Pole and Throw Configuration | 3P |
| FLC Motor Rating | 5.5, 8A |
| Adjustable Current Range | 5.5 → 8 A |
Key Features
- The relay provides reliable overload protection for 3-phase motors up to 3 kW.
- It features 1 normally open and 1 normally closed contact configuration.
- Current adjustment is possible between 5.5 to 8 amperes for flexible motor compatibility.
- Equipped with screw terminals ensuring secure electrical connections.
- Automatic and manual reset options enhance operational convenience.
- Designed to operate in a broad temperature range from -40°C to +70°C.
- Compact size with dimensions 76mm (L) x 45mm (W) x 70mm (D) suitable for direct mounting.
- IP-rated protection (IP65, IP55) allows usage in harsh industrial environments.
Product Description
Siemens 3RU2116-1HB0 is a SIRIUS 3RU2 series Thermal Overload Relay designed for reliable motor protection in industrial and automation applications. Rated for a power capacity of 3 kW, this relay safeguards electric motors operating within a current range of 5.5 to 8 amperes. Its 3-pole design with 1 normally open (NO) and 1 normally closed (NC) contact configuration allows precise control and fault indication.
The relay supports both automatic and manual reset methods, offering flexible operation depending on user preference and application needs. Its screw terminal type connections ensure durable and secure wiring, suitable for demanding electrical installations.
Operating efficiently under extreme temperature ranges from -40°C to +70°C and conforming to IP65 and IP55 ingress protection ratings, the relay withstands harsh environmental conditions commonly encountered in manufacturing plants, HVAC systems, and power distribution environments.
Measuring 76mm in length, 45mm in width, and 70mm in depth, this compact overload relay is ideal for direct mounting on contactors, facilitating easy integration into existing systems. Its auxiliary switch functions as a fault indicator, improving maintenance and operational safety.
Compliant with multiple international standards including UKCA, IEC, CCC, UL, EAC, CE, RoHS, WEEE, and REACH, this Siemens product assures quality, safety, and environmental responsibility. Made in Germany, it is suited for applications requiring precise and dependable thermal protection of three-phase motors.
The relay protects electric motors from overload by interrupting current flow during abnormal conditions. Its adjustable current range accommodates a wide variety of motor ratings. Automatic and manual reset options provide operational flexibility.
Durable screw terminals secure reliable electrical connections in industrial settings. High ingress protection ratings allow operation in environments exposed to dust and moisture. Compact form factor supports easy installation in constrained spaces.
Auxiliary contacts deliver clear fault signaling to automation control systems. Suitable for industrial automation, manufacturing processes, HVAC systems, and power distribution motor protection. Explore more products in Automation & Control Gear at EnvMart for industrial applications requiring high performance and safety.
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Frequently Asked Questions
The Siemens SIRIUS 3RU2 thermal overload relay has an adjustable current range from 5.5 to 8 amperes, allowing for flexible motor compatibility.
This model is rated for a power capacity of 3 kW, making it suitable for protecting electric motors within this power range.
It features a contact configuration of 1 normally open (NO) and 1 normally closed (NC), which allows for precise control and fault indication.
The relay measures 76mm in length, 45mm in width, and 70mm in depth, making it compact for installation.
This thermal overload relay operates efficiently within a temperature range of -40°C to +70°C, suitable for various industrial environments.
It is equipped with screw terminals, ensuring secure and reliable electrical connections in demanding installations.
The relay has IP65 and IP55 ingress protection ratings, allowing it to withstand harsh industrial environments exposed to dust and moisture.
It supports both automatic and manual reset methods, providing flexibility in operation depending on user preference.
This model includes 2 auxiliary contacts that can serve as fault indicators in automation control systems.
The relay complies with multiple international standards including UKCA, IEC, CCC, UL, EAC, CE, RoHS, WEEE, and REACH, assuring quality and safety.
The contact voltage rating for the Siemens SIRIUS 3RU2 thermal overload relay is 690V AC, suitable for various applications.
It is designed for direct mounting, facilitating easy integration into existing systems and installations.
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