Tesla TMCB3P50D HPC2 Circuit Breaker 50 Amp 415V Three Pole 6kA Rating D Curve Motor Start

Description

D curve headroom for heavy inrush loads.

The Tesla TMCB3P50D is a three pole 50 A miniature circuit breaker from the HPC2 Series, built with a D tripping characteristic and a 6 kA breaking capacity at 415V. It holds through the magnetising surge motors and transformers draw at start-up, while still clearing genuine overloads and short circuits.

Key Features

• Rated current: 50 A
• Three pole, 415V rated voltage
• D tripping curve
• Breaking capacity: 6000 A
• Rated frequency: 50/60Hz
• 3 module width
• Bi-metal thermal element for overload tripping
• Overload and short circuit protection for distribution systems
• Pillar terminal with clamp
• Accepts rigid conductor up to 25mm2
• IP20 rated
• Mechanical life: 10000 cycles
• Electrical life: 4000 cycles
• Manufactured to IEC/EN60898
• Approval number V08030

Secure yours online now for fast dispatch Australia-wide.

Why the D Curve Matters

Tripping curves describe how quickly a breaker reacts to current above its rating. A D characteristic tolerates a higher multiple of rated current before the magnetic element operates, so the breaker rides through a brief start-up surge instead of reading it as a fault. Thermal protection against sustained overload is unaffected, because the bi-metal element responds to heat built up over time rather than to the instantaneous peak.

The practical result is a breaker that stays closed through energisation and still opens on a genuine fault. Where a nuisance trip drops out a pump or compressor, that margin decides whether the device holds or is reset at every start.

That distinction is what earns this device its motor start listing with GTS. At 50 A across three poles it suits three phase loads whose inrush would nuisance-trip a breaker with a faster magnetic response, without giving up short circuit protection. Tesla publishes the same D characteristic across the three pole HPC2 range, so a board can be specified consistently and this device dropped in to suit the load.

Built for Australian Distribution Boards

The HPC2 Series is manufactured to IEC/EN60898 and carries approval number V08030. Tesla positions the 6 kA range for commercial, domestic and industrial installations.

Practical detail matters on installation day. The pillar terminal with clamp accepts rigid conductor up to 25mm2, which covers the cable sizes typically landed on a 50 A three phase circuit. The 3 module footprint sets out how much rail space to allow when planning a board, and the breaker ships in boxes of four with an outer of forty for larger fitouts.

Service Life and Ingress

Tesla rates the HPC2 D curve range at 10000 mechanical cycles and 4000 electrical cycles, so the device tolerates regular switching as well as fault duty. Mechanical cycles cover routine manual operation; the electrical figure reflects switching under load, the harsher of the two.

The IP20 rating reflects a breaker intended for installation inside an enclosure or distribution board rather than exposed mounting.

Is the Tesla TMCB3P50D suitable for motor circuits?
Yes. GTS lists this device as a motor start circuit breaker. The D tripping curve is designed to withstand the inrush current drawn by motors and transformers at start-up without nuisance tripping, while still protecting against overload and short circuit.

What is the breaking capacity of the Tesla TMCB3P50D?
The breaking capacity is 6000 A, or 6 kA, at a rated voltage of 415V. It is a three pole device rated at 50 A with a rated frequency of 50/60Hz.

What size cable can the Tesla TMCB3P50D accept?
The breaker uses a pillar terminal with clamp and accepts rigid conductor up to 25mm2. The body occupies 3 modules of rail width and is rated IP20 for installation inside an enclosure.

Warranty

This product is backed by an extended manufacturer warranty - click here for details.