MCB, 1P+N, 40 A, 10kA Breaking Capacity, DIN Rail Mount, Type C Trip

Code / Model:
Manufacturer: Siemens
Department: Fuses and automatic switches
Category of products: Automatic switches
Sub-category: Machinery and apparatus for the manufacture of electrical appliances
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Automatic Disconnect Switch, Series 5SY4

This automatic disconnect switch is available in a variety of configurations to meet your specific needs.

Automatic Disconnect; 1, 2, 3 and 4 poles
DIN rail mounting
Suitable for industrial use, as well as functional and residential construction sectors

The switch is available in two voltage ratings:

The switch has a short-circuit breaking capacity of 10 kA.

The installation depth is 70 mm.

This automatic disconnect switch comes in three types: B, C, and D. Each type offers a different response time to short circuits:

Type B: Offers an instantaneous short-circuit response level of 3 - 5 x normal rated current, making it suitable for circuits with moderate input currents, such as incandescent lamps, heating loads, and small/domestic building protection applications.
Type C: Offers a short-circuit response level of 5 - 10 x rated current, making them suitable for circuits with high input currents, such as motor control and fluorescent lighting installations in industrial buildings, where noise could cause incorrect tripping if a faster type were used.
Type D: Designed for high input loads. Magnetic trip point of 10 to 20 times the rating. Thermal trip point of 1.13 to 1.45 of the protection index. Type AC ensures tripping against sinusoidal alternating currents, regardless of whether they are fast-acting or increase slowly.