It's built for residential and infrastructure branch circuits — think lighting panels, distribution boards, and general-purpose final subcircuits where the load isn't a motor or a transformer inrush. DC rating maxes out at 72 V, so this is an AC-first device — don't spec it for a DC bus without checking the derating.
Thermal derating — the real-world current you get
At 40 °C it drops to 3.81 A, at 45 °C to 3.68 A, and at 55 °C to 3.5 A. That's a roughly 12.5 % derating from the 30 °C figure at the top of the operating range.
Occupies 4 modular width units (MW) on a DIN rail. Mounting position is any orientation, so you can lay it sideways in a shallow panel if the DIN rail is horizontal. Sealable, halogen-free, and silicon-free. Touch protection is built in.