MCCB for line protection — 16 A, 4-pole, high interrupting capacity
The TM220 thermal-magnetic release provides overload and short-circuit protection; the thermal element holds 16 A steady from 40 °C through 55 °C, then derates to 15 A at 60 °C and above. That flat thermal curve means the breaker does not force a de-rate in a warm panel until the ambient exceeds 55 °C, which simplifies sizing in a crowded enclosure. No communication module is fitted; this is a straight electromechanical MCCB with no integrated metering or fieldbus interface.
The 101.6 mm width (4 inches) is the standard 4-pole MCCB footprint for this SENTRON frame size — it occupies four 25.4 mm module positions on a DIN rail or mounting plate. Depth of 70 mm (2.8 inches) leaves clearance for rear-mounted busbars or wiring ducts in a typical 200 mm deep enclosure.
The N-conductor protection is rated at 100 %, meaning the neutral pole is fully rated and does not require de-rating in 4-pole configurations.