Complementary
[Icw] rated short-time withstand current	66 kA 0.5 s; 66 kA 1 s; 36 kA 3 s
[Icm] rated short-circuit making capacity	145 kA 220/415 V AC at 50/60 Hz; 145 kA 440 V AC at 50/60 Hz; 145 kA 500/525 V AC at 50/60 Hz; 145 kA 660/690 V AC at 50/60 Hz
Sensor rating	630 A; 800 A; 1000 A; 1250 A
[Ui] rated insulation voltage	1000 V AC 50/60 Hz
[Uimp] rated impulse withstand voltage	12 kV
Power dissipation in W	100 W
Maximum breaking time	25 ms
Maximum closing response time	70 ms
Mounting support	Rails; Base plate
Upside connection	Front; Rear
Downside connection	Front; Rear
Connection pitch	115 mm
Mechanical durability	25000 cycles with periodic preventive maintenance
Electrical durability	10000 cycles 440 V AC 50/60 Hz conforming to EN/IEC 60947-2; 10000 cycles 690 V AC 50/60 Hz conforming to EN/IEC 60947-2; AC-23A: 10000 cycles 440 V AC 50/60 Hz conforming to EN/IEC 60947-3; AC-23A: 10000 cycles 690 V AC 50/60 Hz conforming to EN/IEC 60947-3; AC-3: 6000 cycles 440/690 V AC 50/60 Hz conforming to EN/IEC 60947-3
Height	352 mm
Width	422 mm
Depth	300 mm
Net weight	50 kg
Standards	EN/IEC 60947-1; EN/IEC 60947-2; EN/IEC 60947-2 Annex H; IEC 61557-12
Product certifications	CE; IECEE CB Scheme
Contractual warranty
Warranty (in months)	18
Environment
IP degree of protection	IP30 conforming to EN 60529
Pollution degree	3 conforming to IEC 60947-1
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-40…85 °C
Operating altitude	0...2000 m without derating; 2000...5000 m with derating
Logistical informations
Country of origin	FR
Main
Range	MasterPacT
Product name	MasterPact MTZ2
Device short name	MTZ2 12 H1
Product or component type	Circuit breaker
Device application	Power distribution protection
Poles description	3P
Control type	Without control unit
Product compatibility	control unit MicroLogic 2.0 X; control unit MicroLogic 5.0 X; control unit MicroLogic 6.0 X; control unit MicroLogic 7.0 X; control unit MicroLogic 2.0 Xi; control unit MicroLogic 5.0 Xi; control unit MicroLogic 6.0 Xi; control unit MicroLogic 7.0 Xi
[In] rated current	1250 A at 40 °C
Breaking capacity code	H1 66 kA 415 V AC
[Ue] rated operational voltage	690 V AC 50/60 Hz
Suitability for isolation	Yes conforming to EN/IEC 60947-2
Selectivity category	Category B
Mounting mode	Fixed
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	29.5 cm
Package 1 Width	30.5 cm
Package 1 Length	37.5 cm
Package 1 Weight	47.252 kg

MasterPact MTZ is the latest generation of air circuit breakers up to 6300 A, in which advanced digital technologies are integrated. The MasterPact MTZ consists of 3 sizes, MTZ1 from 630 to 1600A, MTZ2 from 800 to 4000A and MTZ3 from 4000 to 6300A. It is available in fixed or withdrawable design, as a circuit breaker or load breaker. The integrated protection and tripping device MicroLogic X can be equipped with a wide range of functions and accessories. Air circuit breaker MasterPact MTZ2 1250A H1 Icu is 66kA at 440V 3-pole basic switch fixed installation without MicroLogic X. The MasterPact MTZ can be ordered via the online configurator.