5SY4320-7

What type of electrical device is this?

It is a three-pole miniature circuit breaker designed to protect electrical circuits against overloads and short circuits in industrial and mechanical engineering applications.

What is the rated operating current?

The rated operating current is 20 A under the specified AC operating conditions.

What is the rated AC voltage?

The circuit breaker is rated for operation at 400 V AC with a rated frequency of 50/60 Hz.

How many poles does the circuit breaker have?

It has three poles, allowing simultaneous protection and disconnection of three conductors in a three-phase circuit.

What tripping characteristic does it use?

It uses a Type C tripping characteristic. This curve is commonly selected for circuits with moderate inrush currents, including many industrial loads.

What is its short-circuit breaking capacity?

The rated breaking capacity is 10 kA according to EN 60898. Additional ratings include 20 kA according to IEC 60947-2 and 5 kA according to UL 1077 and CSA C22.2 No. 235.

Can it be used with DC circuits?

The technical data lists a maximum rated DC operating voltage of 72 V and a DC switching capacity of 15 kA according to IEC 60947-2. Circuit configuration and applicable standards should be checked before selection.

What are the dimensions of the unit?

The unit measures approximately 90 mm high, 54 mm wide and 76 mm deep, with an installation depth of 70 mm.

How much panel space does it occupy?

The device occupies three modular width units, corresponding to its 54 mm overall width.

How is the circuit breaker mounted?

It uses a quick assembly mounting system and may be installed in any mounting position, subject to the requirements of the enclosure and electrical installation.

What conductor sizes can be connected?

Solid and stranded conductors from 0.75 mm² to 35 mm² can be connected. Finely stranded conductors fitted with suitable end processing can range from 0.75 mm² to 25 mm².

What terminal tightening torque is specified?

The specified tightening torque for the screw terminals is between 2.5 N·m and 3.5 N·m.

Does it include touch-protected terminals?

Yes. The 5SY4320-7 includes touch protection when conductors are correctly connected, with an IP20 protection rating in that condition.

Can supplementary devices be fitted?

Yes. The design permits compatible supplementary devices to be installed for an expanded circuit protection or indication arrangement.

What is the typical mechanical operating life?

The circuit breaker has a typical mechanical operating life of 20,000 switching cycles.

What ambient temperatures can it operate in?

Published technical data specifies an operating temperature range from -40 °C to 70 °C and a storage temperature range from -40 °C to 75 °C. Current-carrying capacity may require adjustment at elevated temperatures.

Is the enclosure material halogen-free and silicon-free?

Yes. The product data identifies the device as both halogen-free and silicon-free.

Is the circuit breaker sealable?

Yes. The device is designed to be sealable, which can help indicate or restrict unauthorised operation where an appropriate sealing arrangement is used.

Which principal electrical standards apply?

The listed standards include IEC/EN 60898-1, IEC/EN 60947-2 and UL 1077. The required rating should be selected according to the standard governing the intended installation.

What is the approximate net weight?

The circuit breaker has an approximate net weight of 468 g.