Product Description

Siemens 3RB3016-2SB0 Electronic Overload Relay – 3–12 A, Class 20E

The Siemens 3RB3016-2SB0 is a microprocessor-based electronic overload relay from the Siemens SIRIUS 3RB3 series, designed for motor protection against overload, phase failure and asymmetry. The exact Siemens datasheet specifies an adjustable current range of 3–12 A, Class 20E, Size S00, contactor mounting, screw terminals for the main and auxiliary circuits, and manual/automatic reset.

Siemens SIRIUS 3RB3 Electronic Overload Relay

The 3RB3016-2SB0 is designed for electronic protection of three-phase motors in industrial electrical installations. Its electronic evaluation provides an inverse-time overload response with a defined Class 20E characteristic.

The compact S00 contactor-mounted design allows the overload relay to be integrated with compatible Siemens SIRIUS contactors in motor-starter assemblies.

Typical applications include:

• Industrial motor starters

• Pumps

• Fans and blowers

• Compressors

• Conveyors

• Small production machines

• Machine tools

• Process machinery

• Industrial electrical panels

• Motor protection applications

Adjustable 3–12 A Current Range

The 3RB3016-2SB0 provides an adjustable current-setting range of 3 to 12 A, with a 12 A thermal current. Siemens specifies this exact range for the product.

This allows the overload relay to be adjusted according to the rated current of the protected motor.

The current should be set according to the motor nameplate current and the requirements of the complete motor-protection system.

Class 20E Trip Characteristic

The exact 3RB3016-2SB0 is a Class 20E electronic overload relay. Siemens identifies this article as a Class 20E device for motor protection.

Class 20E provides a defined overload tripping characteristic suitable for motors with corresponding starting requirements. The selected trip class should be matched to the motor starting time and application conditions.

Electronic Overload Protection

The primary function of the 3RB3016-2SB0 is electronic protection against motor overload.

The relay monitors motor current and responds when the configured inverse-time overload characteristic is exceeded.

This helps protect compatible motors against:

• Prolonged overcurrent

• Excessive mechanical loading

• Motor overheating caused by overload

• Abnormal operating conditions

• Excessive starting duration

Correct current adjustment is important for dependable protection.

Phase-Failure and Asymmetry Protection

The Siemens 3RB30 Class 20E range provides overload, phase-failure and asymmetry protection. Siemens lists these protection functions for the series.

These functions are important for three-phase motors because phase loss or current imbalance can lead to increased heating and electrical stress.

1 NO + 1 NC Auxiliary Contacts

The 3RB30 Class 20E range provides 1 NO + 1 NC auxiliary contacts. These contacts are used for motor-control and signalling functions such as contactor control, trip indication and fault feedback.

Typical uses include:

• Contactor disconnection

• Trip indication

• Control-panel feedback

• Alarm signalling

• Electrical interlocking

• Motor fault indication

Contactor Mounting

The 3RB3016-2SB0 is designed for contactor mounting and belongs to Size S00. Siemens' product documentation identifies both the overload-relay size and compatible contactor size as S00.

This allows the relay to be combined with a compatible Siemens SIRIUS contactor to form a compact motor-starter assembly.

Screw-Terminal Connections

The 3RB3016-2SB0 uses screw terminals for both the main and auxiliary circuits. Siemens specifically identifies screw connections for this article.

This provides a conventional connection method for industrial electrical panels, motor starters and maintenance applications.

Manual and Automatic Reset

The exact 3RB3016-2SB0 supports manual and automatic RESET. Siemens specifies both reset options for the product.

The datasheet specifies a typical recovery time of approximately 3 minutes with automatic reset, while manual and remote-reset recovery are specified as 0 minutes under the applicable conditions.

The reset method should be selected according to the motor-control requirements and machine operating conditions.

TEST Function and Self-Monitoring

The Siemens 3RB30 Class 20E range includes:

• TEST function

• Switch-position indication

• Self-monitoring

• Manual and automatic RESET

These functions can support commissioning, functional testing, troubleshooting and maintenance.

Electrical and Environmental Characteristics

The 3RB3016-2SB0 has:

• 690 V insulation voltage

• 6 kV surge-voltage resistance

• 0.6 W total power loss at rated current in the hot operating state

• 0.2 W power loss per pole

• -25 °C to +60 °C operating ambient temperature

• Maximum installation altitude of 2,000 m

• Approximate net weight of 0.227 kg

These specifications should be considered during electrical-panel design and installation.

Suitable Motor Applications

The Siemens 3RB30 Class 20E catalog shows the 3RB3016 range for S00 contactor-mounted applications, with the 3–12 A range corresponding to motor ratings of approximately 1.5–5.5 kW at 400 V, depending on the actual motor and application conditions.

Pumps

Suitable for protection of compatible pump motors against overload and phase-related operating conditions.

Fans and Blowers

The Class 20E characteristic can be used for compatible motors with suitable starting requirements.

Compressors

Electronic overload protection helps protect suitable compressor motors from excessive operating current.

Conveyors

The relay can be incorporated into motor starters for compatible conveyor applications.

Machine Tools

Its compact S00 construction suits machine-control and motor-starter panels.

Production Equipment

Suitable for motor-protection requirements in industrial production equipment.

Suitable for OEMs, Panel Builders and Electrical Dealers

The 3RB3016-2SB0 is suitable for OEM equipment manufacturers, electrical panel builders, industrial maintenance teams, industrial buyers and electrical product dealers.

For SB Smart, the product should be positioned around industrial electrical product supply and procurement, without claiming automation integration or automation-service work.

SB Smart can supply Siemens industrial electrical components for requirements across Faridabad, Delhi NCR, Gurgaon/Gurugram, Noida, Haryana, Punjab, Mumbai and other major Indian cities.

Key Features

• Siemens SIRIUS 3RB3 electronic overload relay

• Article number 3RB3016-2SB0

• Microprocessor-based electronic overload protection

• 3–12 A adjustable current range

• Class 20E

• Size S00

• Contactor mounting

• Screw terminals for main and auxiliary circuits

• 1 NO + 1 NC auxiliary contacts

• Overload protection

• Phase-failure protection

• Asymmetry protection

• Manual RESET

• Automatic RESET

• TEST function

• Self-monitoring

• Switch-position indication

• 690 V insulation voltage

• 6 kV surge-voltage resistance

Benefits

• 3–12 A adjustable range: Suitable for compatible industrial motor currents.

• Class 20E: Provides a defined overload characteristic for suitable motor-starting requirements.

• Electronic protection: Provides continuous motor-current monitoring.

• Phase protection: Helps protect against phase failure and asymmetry.

• 1 NO + 1 NC contacts: Provides control, signalling and trip-feedback functions.

• Contactor mounting: Supports compact S00 motor-starter assemblies.

• Screw terminals: Provides a familiar industrial wiring solution.

• Manual/automatic reset: Supports different motor-control requirements.

• TEST and self-monitoring: Assist commissioning and maintenance.

• Compact S00 design: Helps optimize control-panel space.

Why Choose Siemens 3RB3016-2SB0?

The Siemens 3RB3016-2SB0 is a compact electronic overload relay for motor protection in the 3–12 A range with a Class 20E trip characteristic. Siemens specifies S00 contactor mounting, screw connections, manual/automatic reset and 1 NO + 1 NC auxiliary contacts for this exact configuration.

It is a suitable choice for customers looking to buy or source Siemens motor-protection products for industrial electrical panels, motor starters, machinery, maintenance and replacement requirements.

SB Smart supplies Siemens industrial electrical products in India, supporting procurement requirements for industrial buyers, panel builders, maintenance departments and electrical product dealers.

Delivery Across India

SB Smart supplies Siemens industrial electrical products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and major cities across India.

Major delivery locations include:

• Faridabad

• Delhi

• Gurgaon/Gurugram

• Delhi NCR

• Noida

• Greater Noida

• Haryana

• Punjab

• Mumbai

• Pune

• Ahmedabad

• Bengaluru

• Hyderabad

• Chennai

• Kolkata

• Jaipur

• Chandigarh

• Lucknow

• Indore

• Surat

• Vadodara

• Nagpur

• Coimbatore

• And other major cities across India

Frequently Asked Questions

1. What is Siemens 3RB3016-2SB0?

It is a Siemens SIRIUS 3RB3 electronic overload relay for motor protection with a 3–12 A adjustable current range and Class 20E characteristic.

2. What is the current setting range?

The adjustable current range is 3–12 A.

3. What is the trip class?

The exact 3RB3016-2SB0 is Class 20E.

4. Does it provide phase-failure protection?

Yes. Siemens specifies phase-failure and asymmetry protection for the 3RB30 Class 20E range.

5. How many auxiliary contacts does it have?

It provides 1 NO + 1 NC auxiliary contacts.

6. Is it contactor-mounted?

Yes. The 3RB3016-2SB0 is designed for S00 contactor mounting.

7. Does it use screw terminals?

Yes. Siemens specifies screw connections for both the main and auxiliary circuits.

8. What reset options are available?

It supports manual and automatic RESET.

9. Does it have diagnostic functions?

Yes. The 3RB30 Class 20E range includes TEST functionality, switch-position indication and self-monitoring.

10. Where can I buy Siemens 3RB3016-2SB0 in India?

SB Smart supplies Siemens industrial electrical products in India, including SIRIUS electronic overload relays and related motor-protection components for industrial buyers, panel builders, maintenance requirements and product procurement.