It integrates an ammeter, voltmeter, wattmeter, frequency meter, and reactive power meter — all built into the 18 mm wide body — so a single unit provides branch circuit protection plus load monitoring without extra panel meters.
Rated 20 A at 30 °C, the breaker derates to 18.83 A at 40 °C and 16.23 A at 60 °C — the thermal curve governs real-world loading in a warm panel; size for the ambient you actually run, not the 30 °C sticker. Full-scale metering goes to 66 A, so it can monitor a downstream load larger than its own trip rating. Shock qualification to IEC 61373 confirms it for rail-vehicle and trackside enclosures where vibration and impact are a concern. Halogen-free and silicon-free construction matters in confined or clean-room environments where off-gassing or contamination risk must be controlled.
Front face is IP40, rear side IP20 with connected conductors; sealable cover (padlockable) for lockout/tagout.
For a BOM freeze or critical-spare holding, this is a live line with no imminent LTB.