Specifications General Product Family: MasterPact MTZ1 Device Type: Low-voltage air circuit breaker Model: MT116H1 Poles: 3‑pole Application: Protection and isolation in LV power distribution Standards Compliance: IEC 60947‑2 Selectivity Category: Category B Control Type: Manual ON/OFF push-button Mounting Mode: Draw‑out installation Suitability for Isolation: Yes Electrical Ratings Rated Current (In): 1600 A @ 40 °C Rated Operational Voltage (Ue): Up to 690 V AC, 50/60 Hz Rated Insulation Voltage (Ui): 1000 V AC Rated Impulse Withstand Voltage (Uimp): 12 kV Rated Ultimate Short‑Circuit Breaking Capacity (Icu): 42 kA @ 220/415/440/525/690 V AC Rated Service Short‑Circuit Breaking Capacity (Ics): 42 kA Rated Short‑Circuit Making Capacity (Icm): 88 kA @ 220–690 V AC Performance Type / Breaking Capacity Class: H1 (42 kA) Trip Unit Trip Unit Compatibility: MicroLogic series electronic trip units Trip Unit Technology: Electronic protection with overload and short‑circuit functions (LI / LSI options) Mechanical & Installation Operating Mechanism: Manual push-button control Mounting Mode: Draw‑out design for easy withdrawal and maintenance Connection Orientation: Standard panel connection options Mechanical Durability: Designed for frequent operational cycles Environmental Frequency: 50/60 Hz Installation Environment: Indoor switchboards and power distribution panels Pollution Degree: Suitable for industrial environments