The 3120 thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120 is ideally suited for overload protection of motors, pumps, transformers and cables. After tripping, it can reliably, easily and quickly be reset. The positively trip-free mechanism ensures reliable disconnection of the circuit even with the actuator blocked.
Benefits:
Dual Functionality: Combines a circuit breaker and switch in a single compact unit.
High-Performance Bimetal Technology: Responds to overloads based on current intensity and ambient temperature for precise protection.
Quick Reset: Eliminates downtime and the hassle of replacing fuses.
Cost-Effective Design: Streamlines installation, wiring, and logistics—ideal for mass production or modular systems.
Versions Upon Request:
ON/OFF Switch without overcurrent protection according to the relevant standard for switches for appliances IEC/EN 61058
Thermal-Magnetic version for an additional short circuit protection
Typical Applications:
Medical and Laboratory Equipment
Apparatus and Machine Construction
Professional Tools
Household and Garden Appliances
Offices Machines
Audio Equipment
Machine Tools
Key Features:
Single or double pole thermal circuit breaker/switch combination
Voltage ratings: AC 240 V, DC 50 V
Current rating range: 0.1 … 20 A (up to 30 A upon request)
Optional: push-in terminals for easy and quick wiring with a long-term stability
Functional extension options with add-on modules for low voltage release, auxiliary contact function or remote trip
