Line protection breaker, 160 A, with headroom to 70 °C
The TM220 thermal-magnetic release covers overload and short-circuit protection without undervoltage or ground-fault accessories — a clean, no-extra-trip-units build for straightforward feeder or main breaker duty in distribution panels. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. The 415 V and 440 V figures cover most European and North American industrial line-to-line voltages with generous headroom. Thermal performance holds 160 A flat from 40 °C through 50 °C, then derates gradually to 144 A at 70 °C.
Mounting and integration — panel fit
Front IP40 protects against tool entry; the body itself is open for heat dissipation inside the enclosure. Auxiliary contact version is 2 auxiliary switches HP (high-performance), wired separately from the main trip mechanism. Useful for remote status indication or PLC interlocks — the HP designation means higher switching reliability for control circuits compared to standard auxiliary contacts. The storage minimum is the binding limit for cold warehouse or unheated site storage before installation.
What the TM220 release means for coordination
The TM220 overcurrent release is a thermal-magnetic type with adjustable thermal trip time (tr max. 1 s at a multiple of Iu). That adjustability lets you coordinate with downstream breakers or fuses — set the thermal delay to ride through motor inrush or transformer energization without nuisance tripping, while the magnetic instantaneous element handles short-circuit faults. No electronic trip unit here, so no communication or phase-failure detection; this is a straightforward, serviceable breaker for standard distribution.