TeSys Differential 2P 3A

The Schneider Electric TeSys GB2 GB2DB08 is a bipolar thermal-magnetic circuit breaker specifically designed for the protection of control circuits and industrial equipment against overloads and short circuits. It features 2 protected poles, a rated current of 3 A, and magnetic trip at 40 A, equivalent to approximately 13 times the rated current.

This thermal-magnetic breaker supports operation in both alternating current and direct current. In networks up to 400/415 V AC, it provides an Icu breaking capacity of 3 kA in accordance with IEC 60947-2. Its compact 30 mm width makes it easy to install on a 35 mm DIN rail or mounting plate, making it an especially suitable solution for protecting auxiliary circuits in machinery, control transformers, solenoid valves, electric brakes, and other industrial equipment.

Thermal-magnetic protection for control circuits

The GB2DB08 reference combines two operating principles in a single device:

• Thermal protection: acts against sustained overloads that could cause excessive heating of conductors and equipment.
• Magnetic protection: quickly disconnects the circuit when a high current caused by a short circuit occurs.

Its main application is the protection of control and command circuits in industrial equipment. Unlike a residual current device, the GB2DB08 is not intended to detect earth leakage currents, but rather to protect against overcurrents and short circuits.

2 protected poles and 3 A rated current

The Schneider Electric GB2DB08 has a 2P configuration, with thermal-magnetic protection on both poles. Its rated current is 3 A, making it especially suitable for low-power auxiliary and control circuits.

The magnetic trip is calibrated at 40 A, approximately 13 times the rated current. This level allows it to withstand certain inrush currents typical of industrial components without compromising rapid disconnection in the event of a short circuit.

3 kA breaking capacity at 400/415 V AC

The breaking capacity of the TeSys GB2 depends on the circuit voltage. Schneider Electric specifies the following values for this reference in accordance with IEC 60947-2:

• 10 kA at 110 V AC.
• 3 kA at 230/240 V AC.
• 3 kA at 400/415 V AC.
• 1.5 kA at 24 V DC.
• 1 kA at 48 V DC.

The service breaking capacity Ics corresponds to 50% of the Icu at the main AC voltages indicated by Schneider Electric.

Compatible with AC and DC

The GB2DB08 can be used in both AC and DC networks. Its rated operational voltage reaches 415 V AC at 50/60 Hz and it can also be used up to 48 V DC within the categories and breaking capacities specified by the manufacturer.

The device is classified as utilization category A according to IEC 60947-2 and supports DC-12 and DC-13 applications according to IEC 60947-5-1.

Applications in automation and machinery

The Schneider Electric TeSys GB2 is specially developed to protect auxiliary circuits used in industrial automation and control. Typical applications include:

• Machine control circuits.
• Control transformers.
• Solenoid valves.
• Electric brakes.
• Coils and actuators.
• Auxiliary circuits in electrical panels.
• Industrial automation equipment.

Its high magnetic threshold makes it suitable for components that may generate a transient current during connection.

Mounting on DIN rail or plate

The thermal-magnetic breaker can be installed using clips on a 35 mm symmetrical DIN rail or on compatible Telequick mounting plates. It supports vertical or horizontal installation, providing flexibility during electrical panel design.

Operation is carried out via a front lever that allows the device to be switched on, switched off, and manually reset after the cause of the trip has been resolved.

Compact 30 mm wide format

The TeSys GB2 GB2DB08 has reduced dimensions, especially suitable for automation panels where available space is limited:

• Height: 74 mm.
• Width: 30 mm.
• Depth: 70 mm.
• Net weight: approximately 0.115 kg.
• Mounting: 35 mm DIN rail or plate.

Screw terminal connection

The GB2DB08 uses screw terminal connections and supports different conductor cross-sections depending on the number and type of cables installed.

• 1 rigid conductor: from 0.75 to 6 mm².
• 2 rigid conductors: from 0.75 to 4 mm².
• 1 flexible conductor with ferrule: from 0.75 to 4 mm².
• 2 flexible conductors with ferrule: from 0.75 to 2.5 mm².
• Tightening torque: 1.2 Nm.

Mechanical and electrical durability

Schneider Electric specifies a mechanical durability of 8,000 cycles and an electrical durability of 8,000 cycles for this circuit breaker, offering a service life suitable for professional control and automation applications.

The power loss indicated by the manufacturer is approximately 2 W per pole.

IP20 protection and environmental resistance

The device has an IP20 protection rating according to IEC 60529, so it is intended mainly for installation inside electrical panels or enclosures that provide the protection level required by the installation.

• Operating temperature: -20 to 60 °C.
• Storage temperature: -40 to 80 °C.
• Maximum operating altitude: 3000 m.
• Fire resistance: 960 °C according to IEC 60695-2-1.
• Impulse withstand voltage Uimp: 4 kV.

Technical features of the Schneider Electric GB2DB08

• Brand: Schneider Electric.
• Reference: GB2DB08.
• Range: TeSys.
• Product: TeSys GB2.
• Type: thermal-magnetic circuit breaker.
• Application: control circuit protection.
• Number of poles: 2P.
• Protected poles: 2.
• Rated current: 3 A.
• Trip technology: thermal-magnetic.
• Magnetic trip current: 40 A.
• Magnetic threshold: approximately 13 x In.
• Network type: AC/DC.
• Rated operational voltage AC: up to 415 V AC.
• Frequency: 50/60 Hz.
• DC use: up to 48 V DC depending on application.
• Icu at 110 V AC: 10 kA.
• Icu at 230/240 V AC: 3 kA.
• Icu at 400/415 V AC: 3 kA.
• Icu at 24 V DC: 1.5 kA.
• Icu at 48 V DC: 1 kA.
• Utilization category: A according to IEC 60947-2.
• DC categories: DC-12 and DC-13 according to IEC 60947-5-1.
• Impulse withstand voltage Uimp: 4 kV.
• Mounting: 35 mm DIN rail or plate.
• Control type: lever.
• Protection rating: IP20.
• Height: 74 mm.
• Width: 30 mm.
• Depth: 70 mm.
• Weight: approximately 0.115 kg.
• Mechanical durability: 8,000 cycles.
• Electrical durability: 8,000 cycles.
• Power loss: 2 W per pole.
• Operating temperature: -20 to 60 °C.
• Maximum altitude: 3000 m.
• Main standards: IEC/EN 60947-1 and IEC/EN 60947-2.
• EAN: 3389110865431.

Compact protection for industrial auxiliary circuits

The Schneider Electric GB2DB08 offers a dedicated solution for protecting control and command circuits against overloads and short circuits. Its bipolar 3 A configuration, 40 A magnetic trip, and 3 kA breaking capacity at 415 V make it suitable for numerous industrial automation and machinery panels.

Its 30 mm width, DIN rail mounting, AC and DC compatibility, and high mechanical resistance make the TeSys GB2 an especially suitable choice for protecting control transformers, solenoid valves, electric brakes, and other auxiliary components in professional installations.