Introducing TemBreak Pro — powering today and connecting tomorrow

TemBreak PRO is a range of robust and reliable moulded-case circuit breakers (MCCBs) from Terasaki, available through NHP.

After considering feedback about its existing range of MCCBs from all sectors, Terasaki has released a new range, featuring built-in trip units that can handle overcurrent protection, measurement and circuit configuration — all in one device, ensuring quality control and guaranteeing performance. The communications, configuration and display modules allow remote access to these functions.

The TemBreak Pro range includes colour-coded labels to help identify trip unit technology type and the right application fit:

  • White label: Thermal Magnetic
  • Grey label: Basic Electronic
  • Blue label: SMART Electronic

Grey label: Basic Electronic

When it comes to trip units, TemBreak Pro has all the options, but there is one trip unit model that is the best friend of all switchboard builders, contractors, consultants and end users!

The Basic Electronic offers fully adjustable LSI protection and is available on ‘P model’ MCCBs with frame sizes 160–630 A.

The Basic Electronic features a granular pick up current and time delay setting adjustments ensuring selectivity studies are a breeze for consultants. Both the Overload (L) and Short Time short circuit (S) settings can be independently disabled, making the basic electronic trip unit suitable for motor starting applications.

The Basic Electronic has a pre-trip alarm function as standard, which is useful for basic load shedding requirements.

The P model Basic Electronic MCCBs with trip unit type P_BE offer flexibility via individual setting capability for Long Time, Short Time and Instantaneous and Ground Fault characteristics, as well as many other standard or optional features. Settings include instantaneous-only, while standard LED indicators are trip unit over-temperature, PTA, ready and pick-up.

B model Basic Electronic MCCBs with trip unit type B_BE provide LSI overload protection for overloads and short circuits. The trip units consist of a standard 2-dial type (yellow coloured dials) and feature a base current adjustment dial, and the choice of up to 10 standard characteristic curves (B400_BE to B1600_BE), or eight dials for 250AF MCCBs (B250_BE). 2-dial electronic MCCBs include as standard, an instantaneous only characteristic which can assist in some grading or motor start applications. Ground fault protection is optional, and 4-pole versions include neutral pole protection as standard.

XS model Basic Electronic MCCBs with trip unit type XS_BE consist of a flexible 5-dial type, which allow adjustment of all parts of the characteristic curve Long Time, Short Time and Instantaneous settings. Ground fault protection is available for current ratings 2000 A/2500 A.

White label — Thermal Magnetic

TemBreak PRO moulded case circuit breakers with a white label are available with thermal magnetic trip units in ratings from 20 A to 800 A. The trip units are easy to adjust, as they come as standard with a thermal current adjustment dial and a magnetic/instantaneous adjustment dial.

Users select the current rating via a dial adjustment. An adjustable magnetic characteristic allows short circuit protection to be matched to the load and supply characteristics, for example motor inrush currents or generator short circuit currents.

Lowering the short circuit tripping threshold can allow a higher earth-loop impedance in an installation and provide end-of-cable protection with the correct disconnection times.

Blue label — SMART Electronic

TemBreak Pro moulded case circuit breakers with a blue label are available with SMART Electronic trip units.

P model SMART Electronic MCCBs with trip unit type P_SE, in addition to protecting against overloads and short circuits, offer flexibility via individual setting capability for Long Time, Short Time, Instantaneous and Ground Fault characteristics, as well as a range of other standard or optional features. This allows for improved selectivity combinations between MCCBs or other circuit breaker types, plus a wide range of electrical measurement and communication functions via the P_SE SMART Metering MCCB range.

B model SMART Electronic MCCBs with trip unit type B_SE or B_SX, 400AF to 1000AF consist of a meter built into the MCCB and offer flexible adjustment of the characteristic curve Long Time, Short Time and Instantaneous settings. Settings are entered via a menu system in the integral meter.

Trip units P_SE, B_SE and B_SX offer industrial communication options.


For basic power requirements

Small light and power main distribution boards — cost and space saving options with the Thermal Magnetic A160 / A250 models.

For complex power reticulation

Large main distribution boards achieve AS3000 Safety Services and Selectivity requirements while optimising cable sizes with the highly flexible, yet simple to use Basic Electronic trip unit.

For motor control centres

The small P160 frame size is available with Thermal Magnetic, Basic Electronic or SMART Electronic trip units optimising physical size and Type 2 co-ordination.

For arduous environments

TemBreak Pro MCCBs deliver maximum power at ambient temperatures up to 50°C so there is no need to oversize the MCCB design, reducing overall cost.

Tiny but mighty P160

The P160 frame size with Basic Electronic trip unit has a pole pitch of just 30 mm, giving ultimate performance for selectivity and type 2 coordination in a super small footprint.

More information

For more information on the Terasaki TemBreak Pro range of MCCBs or other SMART Power Distribution solutions, please call your local NHP Account Representative, or email us at:

Australia — 1300 NHP NHP

New Zealand — 0800 NHP NHP

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