MCB 2P, 50 A, Breaking Capacity 10 kA, DIN Rail Mount, Type B 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 various configurations to meet diverse application needs.

The switch supports the following 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 different types (B, C, and D) with varying response characteristics to short-circuit currents:

Type B: Offers an instantaneous short-circuit response level of 3 - 5 x normal rated current. Suitable for circuits with moderate input currents, such as incandescent lamps, heating loads, and small/domestic building protection applications.
Type C: Provides a short-circuit response level of 5 - 10 x rated current. Appropriate for circuits with high input currents, like 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 for sinusoidal alternating currents, regardless of whether they are fast-acting or increase slowly.