
Tmax
MCCBs
Low Voltage Products & Systems 17.11
ABB Inc. • 888-385-1221 • www.abb.us/lowvoltage 1SXU000023C0202 Rev. A
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Introduction
ABB is once again demonstrating its
commitment to new product development
and its superiority in product technology.
Never before has the industry seen such high
performance, versatility and standardization in a
range of molded case circuit breakers.
The ABB Tmax line of circuit breakers, with a
range up to 3000A, has several key features
that go along with its very small size:
• Double insulation – this construction
characteristic allows for the UL Listed eld
installation of internal accessories without
exposure to energized parts.
• Complete range of electrical and
mechanical accessories
• Positive operation – breakers from ABB
ensure that the toggle indicates the precise
position of the moving contacts. This
guarantees safe and reliable signaling by
the device.
• Installation – Tmax molded case circuit
breakers can be installed in panels and
switchboards in either the horizontal
or vertical planes while being fed from
either end without any derating of their
performance characteristics.
• Interrupting ratings at 480VAC up to
150kAIC.
• Compact size
• All Tmax molded case circuit breakers
are UL Listed and IEC rated for global
application and acceptance.
• All versions of the Tmax family are suitable
for reverse feed applications.
The ABB Tmax product line has the performance
and accessories to satisfy all industry
requirements in the 600VAC to 600VDC ranges.
Frame sizes — Nine basic sizes
The ABB Tmax series includes nine basic frame
sizes as well as the T1 single pole with the range
rated from 15A to 3000A at 480VAC. The various
versions carry the following interrupting capacities:
• B Basic breaking capacity
• N Normal breaking capacity
• S Standard breaking capacity
• H High breaking capacity
• L Extra high breaking capacity
• V Very high breaking capacity
Derived versions
• Thermal magnetic
• Electronic
• Molded case switches
• Motor circuit protectors (MCPs)
• Direct current (DC) rated
ABB Tmax versions
• Fixed: all models
• Drawout or plug-in: T2, T3, Ts3, T4, T5, T6,
T7 & T7M
• UL File #E93565 (breakers and MCPs)
#E116596 (Accessories)
#E116595 (Molded case switches)
Tmax
Molded case circuit breakers
Tmax
Molded case circuit breakers