General
Number of poles (total)	4
Number of protected poles	3
Rated voltage	415
Rated insulation voltage Ui	500
Rated impulse withstand voltage Uimp	4
Rated current	6
Rated fault current	0.3
Leakage current type	A
Current limiting class	3
Rated short-circuit breaking capacity acc. EN 61009	6
Rated short-circuit breaking capacity IEC 60947-2	10
Rated short-circuit breaking capacity Icn acc. EN 61009-1	6
Disconnection characteristic	Undelayed
Voltage type	AC
Frequency	50/60 Hz
Release characteristic	B
Over voltage category	3
Pollution degree	2
Ambient temperature during operating	55
Width in number of modular spacings	4
Built-in depth	69
Degree of protection (IP)	IP2X
Connectable conductor cross section solid-core	25
Connectable conductor cross section multi-wired	25
Mounting method	DIN rail
Power loss	7.5
Concurrently switching N-neutral
With interlocking device
Anti-nuisance tripping version

Residual current circuit breakers (RCBOs) offer protection for people and property as well as protection against electrically ignited fires in accordance with DIN VDE 0100-410 and DIN VDE 0100-530. They guarantee protection of three single-phase or three-phase circuits against overload and short-circuit currents, protection against sinusoidal alternating currents and pulsating currents with a smooth DC residual current component of up to 6 mA against earth. As well as fault protection (protection against indirect contact), additional protection (with I¿n = 30 mA) and fire protection (with I¿n = 300 mA). They meet the product standard IEC/EN 61009-1 (VDE 0664-20). Areas of application are household, commercial and industrial applications. The extensive range of accessories offers you everything you need for your installation tasks. Numerous approvals make the DS203NC fit for worldwide use.
Rated switching capacity Icn = 6,000 A according to IEC/EN 61009-1 (VDE 0664-20) for RCDs (residual current devices) in residential buildings and similar applications, Icu = 10 kA according to IEC/EN 60947-2 (VDE 0660-101) for MCBs (LS) in industrial applications.
RCBO DS203NC A Type A is 3-pole protected (LS), 4-pole switching and can be used in three-phase networks with or without N conductor.