Breaking capacity is voltage-dependent: 40 kA Icu at 240 V AC, 25 kA at 415 V, 20 kA at 440 V, and 15 kA at 500 V. That is enough headroom for a typical 800 kVA transformer secondary. The utilisation category is A, meaning it is not intended for cascading (no intentional short-time delay).
The thermal element tracks RMS heating; the magnetic pickup is fixed and non-adjustable on this fixed-trip variant. For adjustable magnetic or electronic protection you would step up to the TM-D with adjustable magnetic or the Micrologic range.
The 3-pole breaker is 105 mm wide, 161 mm high, 86 mm deep. IP40 front face (tool-protected), IK07 impact resistance. No earth-leakage protection built in; if you need that, the breaker accepts a Vigi add-on module.
Durability and power dissipation
Mechanical durability is rated at 50,000 cycles. Electrical durability depends on load: 50,000 cycles at 440 V at half rated current (In/2), 30,000 cycles at full rated current (In), 20,000 cycles at 690 V In/2, and 10,000 cycles at 690 V In. Power dissipation per pole is 8.8 W, so at full load the three poles together dissipate about 26.4 W — factor that into your enclosure thermal budget.
This is a current-production part — no end-of-life notice on file.