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Siemens 5SY6240-7 Miniature Circuit Breaker - 2-Pole, 40A

Siemens 5SY6240-7 2-pole, 40A miniature circuit breaker.

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ManufacturerSiemens

Part number5SY6240-7

Poles 2

Rated Current 40A

Rated Voltage 400 V

Breaking Capacity 6 kA

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Veteran-owned

CAGE: 9NK75

2-pole protection 40 Ampere rating C-curve for moderate inrush 6 kA short-circuit rating DIN rail mountable Overcurrent and short-circuit protection

Product description

The Siemens 5SY6240-7 is a 2-pole miniature circuit breaker (MCB) designed for reliable overcurrent protection in electrical installations. It operates at a rated voltage of 400 V and has a breaking capacity of 6 kA, suitable for protecting circuits against short circuits and overloads. The breaker features a C-curve tripping characteristic, indicating it trips between 5 to 10 times the rated current, making it ideal for circuits with moderate inrush currents.

This MCB is commonly used in residential, commercial, and industrial applications to protect lighting circuits, socket outlets, and small motor loads. Its compact design and DIN rail mounting (70 mm width) facilitate easy installation within distribution boards and control panels.

Stanlo Automation, a veteran-owned business specializing in surplus industrial parts, offers the Siemens 5SY6240-7. We provide cost-effective and dependable circuit protection solutions for your electrical systems.

Technical specifications

Poles	2
Rated Current	40A
Rated Voltage	400 V
Breaking Capacity	6 kA
Tripping Curve	C
Mounting	DIN Rail (70 mm)

Common applications

Residential electrical panels

Commercial distribution boards

Industrial control panels

Lighting circuits

Socket outlet protection

Motor circuit protection

Compatible systems

Standard DIN rail mounting systems Electrical distribution boards Control panels

Also known as

Siemens MCB 40A 5SY6 circuit breaker 2-pole breaker 40A Siemens DIN rail breaker

Replaces / compatible with

This circuit breaker replaces older or faulty MCBs of the same rating and tripping characteristics. Compatible with standard DIN rail mounting systems.

Technical note

Expert tip

Ensure the incoming power supply voltage does not exceed the breaker's 400V rating for safe and effective operation.

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Frequently asked questions

What is the breaking capacity of the Siemens 5SY6240-7 circuit breaker?

The Siemens 5SY6240-7 miniature circuit breaker has a breaking capacity of 6 kA (kiloamperes). This rating indicates its ability to safely interrupt fault currents up to this level.