Overview
The Siemens 3RB2283-4AA1 is a 3-pole Unclassified device rated for 630 A switching current with an adjustable trip class covering CLASS 5, 10, 20 and 30. It operates on a 230 V supply and is housed in an IP20 enclosure for stand-alone installation with screw-type terminals.
Function & operation
The 3RB2283-4AA1 provides overcurrent protection for three-phase loads up to 630 A, with a trip class that can be set to 5, 10, 20, or 30 depending on the starting characteristics of the connected motor or transformer. The 300 V insulation rating (Voltage Insulation and insulation_voltage_v both 300 V) defines the system voltage it can be applied to, while the adjustable trip class lets the installer match the thermal curve to the inrush duration.
Applications
This device is suited for motor branch circuits, transformer feeders, and other three-phase loads where adjustable overload protection is needed. The 630 A switching current and adjustable trip class make it applicable in industrial panels, pump stations, and conveyor systems where starting currents vary.
Lifecycle & availability
RoHS compliance is confirmed since 28-05-09. No end-of-life or phase-out notice is recorded in the available evidence; the part is treated as an active catalog item. Sourcing is via RFQ — confirm current lead time and minimum order on the quote.