Complementary
[Ui] rated insulation voltage	750 V DC conforming to IEC 60947-2
[Uimp] rated impulse withstand voltage	8 kV conforming to IEC 60947-2
[Ics] rated service breaking capacity	36 kA at 24...125 V DC conforming to IEC 60947-2; 36 kA at 250 V DC conforming to IEC 60947-2; 36 kA at 500 V DC conforming to IEC 60947-2; 36 kA at 750 V DC conforming to IEC 60947-2
Mechanical durability	5000 cycles
Electrical durability	2000 cycles at 750 V In/2; 1000 cycles at 750 V In
Mounting support	Backplate
Mounting position	Horizontal and vertical; Flat on the back
Upside connection	Front
Downside connection	Front
Connection pitch	45 mm
Protection type	L : for overload protection (thermal); I : for short-circuit protection (magnetic)
Trip unit rating	250 A at 40 °C
Long-time pick-up adjustment type Ir (thermal protection)	Adjustable
[Ir] long-time protection pick-up adjustment range	0.7...1 x In
Instantaneous protection pick-up adjustment type Ii	Adjustable
[Ii] instantaneous protection pick-up adjustment range	2.5...5 x In
Earth-leakage protection	Without
Number of slots	6 slot(s)
Width (W)	140 mm
Height (H)	255 mm
Depth (D)	110 mm
Net weight	8 kg
Contractual warranty
Warranty (in months)	18
Environment
Standards	EN/IEC 60947-2
Pollution degree	3 conforming to IEC 60664-1
IP degree of protection	IP40 conforming to IEC 60529
IK degree of protection	IK07 conforming to IEC 62262
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-50…85 °C
Relative humidity	0…95 %
Operating altitude	0...2000 m without derating; 2000 m...5000 m with derating
Logistical informations
Country of origin	FR
Main
Range	ComPacT
Product name	ComPacT NSX DC
Device short name	NSX400F DC
Product or component type	Circuit breaker
Device application	Distribution
Poles description	3P
Protected poles description	3D
[In] rated current	250 A at 40 °C
[Ue] rated operational voltage	750 V DC
Network type	DC
Suitability for isolation	Yes conforming to EN/IEC 60947-2
Utilisation category	Category A
Breaking capacity	36 kA Icu at 24...125 V DC 1 pole conforming to IEC 60947-2; 36 kA Icu at 250 V DC 1 pole conforming to IEC 60947-2; 36 kA Icu at 500 V DC 2 poles in series conforming to IEC 60947-2; 36 kA Icu at 750 V DC 3 poles in series conforming to IEC 60947-2
Breaking capacity code	F 36 kA 750 V DC
Trip unit name	TM-DC
Trip unit technology	Thermal-magnetic
Trip unit protection functions	LI
Control type	Toggle
Circuit breaker mounting mode	Fixed
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	14.700 cm
Package 1 Width	20.000 cm
Package 1 Length	29.100 cm
Package 1 Weight	5.350 kg
Unit Type of Package 2	S04
Number of Units in Package 2	3
Package 2 Height	30 cm
Package 2 Width	40 cm
Package 2 Length	60 cm
Package 2 Weight	16.700 kg
Unit Type of Package 3	P12
Number of Units in Package 3	12
Package 3 Height	45.000 cm
Package 3 Width	80.000 cm
Package 3 Length	120.000 cm
Package 3 Weight	78.800 kg

ComPacT NSX 250F DC is a complete fixed 3-pole circuit breaker designed to optimize space and breaking capacity. It is an optimal choice for applications using DC voltages. The breaking capacity (Icu) is 36 kA rms at 750 VDC. The operating voltage is 750 VDC. This product includes a thermal-magnetic trip device (TM-DC) with a rating of 250 A. The TM-DC trip device provides adjustable thermal overload protection and adjustable magnetic protection. The dimensions are 255 mm x 140 mm x 110 mm (H x W x D). It complies with the international standard EN/IEC 60947.