If you’re working on electrical distribution systems—whether you’re a contractor in the field or an end user responsible for facility reliability—you know choosing molded-case circuit breakers (MCCB) goes beyond the spec sheet. It’s about safety, uptime, performance, and flexibility. Compare SACE Tmax vs. ABB SACE FORMULA breakers.
That’s where ABB SACE Tmax molded case circuit breakersstand out. ABB Tmax Breakers give you a full lineup of reliable, versatile breakers made for modern electrical demands. Covering small commercial panels to high-fault industrial power systems.
When you choose the ABB Tmax breaker family, including the popular T4, T5, T6, and T7 breakers, you’re getting a system built for durability, easy installation, and a range of applications. The lineup ranges from 20A to 1600A with solid AC and DC capabilities—giving you one breaker platform. See the ABB Tmax manuals and catalog.
200 kA interrupting capacity
ABB Tmax T4, T5, T6, T7 Breakers for Power Distribution
The ABB Tmax MCCB lineup gives you four core frame sizes to solve nearly any load or short-circuit requirement:
T4 (up to 320 A) T5 (up to 630 A) T6 (up to 1000 A) T7 (up to 1600 A)
These ABB circuit breakers are durable, giving you performance up to 200 kA interrupting capacity depending on the model. That means you can deploy them in industrial switchboards, commercial distribution panels, motor loads, feeders, and high-fault environments requiring high-performance molded case circuit breakers.
You can mount an ABB Tmax breaker vertically or horizontally, feed from the top or bottom, and choose from fixed, plug-in, or draw-out (withdrawable) versions. That flexibility helps you adapt to installation constraints—something every contractor and technician appreciates inside cramped electrical rooms.
Electrical Ratings
ABB Tmax MCCB Specs: Voltage, Current Rating
As you compare breaker families across brands, ABB Tmax Breakers specifications stand out for several reasons:
Wide Electrical Ratings Voltage: Up to 690 V AC DC capability up to 750 V on many models Current ratings: 20–1600 A Breaking capacity: Up to 200 kA, depending on frame
These ratings give you the latitude to integrate ABB molded case circuit breakers into medium-duty and heavy-duty electrical systems without juggling multiple product families.
Built for Harsh Conditions ABB designed the Tmax line for environments ranging from -25°C to +70°C, giving you reliable operation even in harsh manufacturing, outdoor, or equipment-room conditions. Long Life Expectancy
Electrical and mechanical endurance ratings are impressive, meaning you get fewer nuisance failures and long-term stability—key benefits for maintenance teams and facility operators.
Advanced Protection Options
ABB Tmax Circuit Breaker Protection Features
Protection performance is where an ABB Tmax breaker really stands out. Unlike basic MCCBs, the Tmax lineup supports a wide range of protection features that help you keep systems stable and safe.
Standard protections include: L – Overload protection S – Short-time delay protection I – Instantaneous short-circuit protection G – Ground-fault protection These features help ensure proper coordination in your distribution system, preventing unnecessary trips and isolating faults quickly.
Advanced Protection Options If you choose electronic trip units, you unlock additional capabilities such as: Phase unbalance protection Overtemperature protection Voltage and frequency protection Residual current (ground-fault) detection Zone selectivity (ZS) for faster downstream fault clearing
Advanced digital trip units bring you the kind of precision, system intelligence, and coordination control normally found in more expensive gear—and that’s a major win when you’re working on large or mission-critical systems.
Control and Protection
ABB SACE Tmax Trip Unit Options
One of the biggest benefits of the Tmax series is the wide selection of trip units, giving you fine-tuned control over protection settings.
Thermomagnetic Trip Units (TMD, TMA, TMG) These are perfect when you want simple, proven protection with easy adjustability. They give you: Adjustable overload thresholds Adjustable or fixed magnetic trips Ideal performance for feeders, branch circuits, general-purpose loads
Magnetic-Only Trip Units (MA/MF) for motor applications, generator protection, or DC systems.
Electronic Trip Units (PR221, PR222, PR223, PR231, PR331, PR332) for precision, diagnostics, and advanced features:
Adjustable curves Ground-fault options Zone selectivity Unbalance detection Better coordination with upstream gear Electronic units help contractors tune systems easily without swapping hardware, and end users benefit from higher reliability.
Simplifying Your Job
Installation Flexibility & Accessories
Whether you’re installing in new construction or retrofitting older gear, the ABB Tmax Breakers platform makes your job easier. You can choose:
– Fixed frame breakers – Plug-in units for quick swapouts – Withdrawable units with door-closed racking for improved arc-flash safety
This accessory ecosystem lets you customize the breaker for each environment without switching to different product families.
Electrical Protection
ABB Tmax Breakers in Real-World Applications
Because ABB Tmax Breakers cover a wide electrical range, you can drop these breakers into almost any environment, including:
– Commercial buildings – Industrial plants – Pumping stations – Data centers – OEM equipment – Manufacturing lines – Motor control applications – High-fault industrial distribution systems
Where reliability and protection matter, the ABB SACE Tmax breakers give you a solid foundation.
Frame, Voltage, Breaking, Trip
Choose the Right ABB Tmax Breaker
When selecting the right ABB Tmax molded case circuit breaker, start with these key steps: 1. Choose the correct frame size (T4–T7). 2. Match the voltage and current rating to your load. 3. Select the appropriate breaking capacity based on available fault current. 4. Pick the breaker trip unit type—thermomagnetic for traditional applications or electronic for greater control.
Decide on the installation style (fixed, plug-in, draw-out). Add the accessories needed for your system’s safety and operational requirements.
Popular ABB SACE Tmax Models
Model Number
Short Description
XT1 160
Compact MCCB for small commercial loads up to 160A.
XT1 S160
XT1 high-performance variant with enhanced breaking capacity.
XT2 H160 R40
Heavy-duty XT2 breaker with high interrupt rating and R40 trip unit.
XT4 250 S
Mid-range MCCB up to 250A with strong short-circuit performance.
T4 320
Proven T4 frame breaker for distribution circuits up to 320A.
T5 400
Versatile 400A breaker for industrial feeders and equipment protection.
T5 630
High-capacity 630A MCCB for larger distribution and motor loads.
T6 800
Heavy-duty T6 breaker serving 800A applications in industrial switchboards.
T7 1000 PR332/P-LSIG
Advanced 1000A breaker with electronic LSIG trip unit for selective protection.
T7 1250
Large-frame 1250A breaker for high-fault and mission-critical systems.
When you choose the ABB SACE Tmax family, you’re getting breakers built for flexibility, safety, and performance. Whether you’re upgrading a facility, building new switchboards, or replacing legacy MCCBs, the Tmax lineup gives you a reliable solution with modern features. You get the protection precision you want, the durability you need, and the installation flexibility that keeps your job running smoothly.
What You Should Know
What makes ABB SACE Tmax breakers different?
They offer high interrupting ratings, modular accessories, withdrawable versions, and advanced electronic trip functions beyond standard MCCBs.
What frame sizes are available?
T4, T5, T6, and T7 covering 20A–1600A
Can I use Tmax breakers for both AC and DC?
Yes. Many models are rated for DC systems up to 750 V.
What trip units are available?
Thermomagnetic, magnetic-only, and several tiers of electronic trip units with advanced protection features.
Are Tmax breakers available in withdrawable versions?
Yes—T4, T5, T6, and T7.
Are they good for high-fault applications?
Yes. Models offer breaking capacities up to 200 kA depending on size.
Can I mount them in any orientation?
Yes—horizontal, vertical, or flat on the backplate with no derating.
Glossary
MCCB: A molded-case circuit breaker protecting systems from overloads and short circuits.
Breaking Capacity: Maximum fault current the breaker can safely interrupt.
Trip Unit: Internal device that senses overcurrent and commands the breaker to open.
Thermomagnetic Trip: A protection system combining thermal overload sensing and magnetic short-circuit tripping.
Electronic Trip Unit: Microprocessor-based protection for advanced accuracy and control.
Zone Selectivity (ZS): A method enabling faster fault clearing at the closest breaker while maintaining upstream coordination.
Residual Current Protection: Ground-fault protection that detects leakage using external sensing.
Withdrawable Breaker: A breaker that racks in and out of its housing without rewiring.
Double Insulation: Safety design separating live and operator-accessible parts.
