The TM-D gives you fixed L (thermal overload) and I (magnetic short-circuit) protection curves; no adjustment dials, which means fewer setup variables on a distribution board where the load profile is stable. Rated 100 A at 50 °C, so it carries the full nameplate into a warm enclosure without derating — useful when the panel sits near process heat or in a non-air-conditioned electrical room. Breaking capacity is where this H-code variant earns its place: 70 kA Icu at 415 V AC, 65 kA at 440 V, 50 kA at 500 V. The breaker is also certified for isolation per EN/IEC 60947-2, meaning you can safely lock it off for downstream work without a separate disconnect. The 4-pole version with neutral on the left (1 x Ir, 4D protection) gives full phase and neutral protection — no separate neutral breaker needed.
Durability and application context
Mechanical endurance is rated at 50,000 cycles; electrical endurance depends on the switched current — 50,000 cycles at 440 V at half rated current (In/2), 30,000 cycles at full 440 V In, and 10,000 cycles at 690 V In. That electrical durability curve is typical for a molded-case breaker in distribution duty — frequent switching under load (like a capacitor bank or a motor starter feeder) will wear the contacts faster, so plan for replacement at the lower cycle count if the breaker sees daily full-load operations. The IK07 impact rating means it withstands a 2 J hammer blow — enough for accidental tool contact during panel work.