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Circuit Breakers
Altech is a U.S. leader in DIN-rail mounted circuit breakers, with ratings up to 63A and short-circuit capacities to 10kA. Only Altech offers a complete line approved to UL489, UL508, and UL1077, covering branch, motor, and supplementary protection in one family.
UL489 breakers provide true branch circuit protection in AC and DC up to 63A. UL508 manual motor controllers deliver the industry’s widest trip-curve selection and withstand up to 10kA. UL1077 supplementary protectors add reliable load-side protection for control circuits and auxiliary equipment.
With unmatched depth, durability, and compliance, Altech breakers ensure safe, dependable protection for any application.
Product selection guide near bottom of page.
Doepke Breakers
Breaker Comparison
Range of products in this category.
UL(AC), DL(DC) - Series
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UL489 Miniature Molded Case Circuit Breakers
- Available in AC and DC models
- DIN Rail Mounted
- 17.5mm width
- Thermal Magnetic
- 240V, 480Y/277V AC, 50/60Hz
- 125V DC (1 pole); 250V DC (2pole)
- 10kA Short Circuit
Interrupting Capacity - HACR Type 40°C
- Line/Load reversible
UM - Series
UL508 Listed Manual Motor Controllers
“Suitable as Motor Disconnect”
- DIN Rail Mounted
- 17.5mm width per pole
- Thermal Magnetic
- 0.3-60A / 480Y/277V AC, 50/60Hz
- 10kA Short Circuit
Withstand Capacity - Applications Include:
- AC Motor Starting, Across the Line
- AC General Use
- AC Resistance
- AC Discharge Lamps (Ballast)
- AC Incandescent Lamps (Tungsten)
UR - Series
UL1077 Recognized Supplementary Protector
- DIN Rail Mounted
- 17.5mm width per pole
- Thermal Magnetic
- 0.3-60A / 480Y/277V AC, 50/60Hz
- 10kA Short Circuit
Withstand Capacity - Applications (on the load side
of Branch Circuit Protection)
include: Sensitive Electronics,
Power Supplies, Appliance
circuits, etc.
DFS - Series
RCCB Earth Leakage Circuit Breakers
Compact DIN rail mount RCCB Earth Leakage Circuit Breakers detect and interrupt ground faults. They are VDE approved for the European system of protecting people, animals, equipment and property from dangerous line-to-ground and shock hazard currents.
MA - Series
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Three Phase Adjustable Trip Miniature Circuit Breakers/ Manual Motor Controllers
The MA was designed to handle the high inrush loads of 3 phase transformers, power supplies, motors, etc. The MA protects wiring and equipment from damage caused by the three major classes of overcurrent, yet greatly reduces the number of nuisance trips in high starting and inrush current circuits.
TR - Series
UL1077 Recognized Supplementary Protector/Circuit Breaker for Equipment
Electrical Ratings: 0.5-16.0A / 240V AC, 50/60Hz, 32V DC / 24V DC (VDE)
Applications:
Protection of Control Transformers, UPS, Power strips, Solenoids etc., against damage due to
overload conditions.
Busbars
UL489 Busbar System
The Altech Busbar System is an innovative way to jumper up to 57 poles of Miniature Circuit Breakers (MCB).
The advantages of this busbar system are:
30% Installation time savings
Panel space savings
Reduced maintenance
High electrical ratings
Cuttable UL489 Busbar System
The advantages of this busbar system are:
- Ratings of up to 115A
- UL listed for use with most competitor’s UL 489 Miniature Circuit Breakers
- 30% Installation time saving
- Panel space savings
- Reduced maintenance
- High electrical ratings
Cuttable UL508 / UL1077 Busbar System
The Altech Busbar System is an innovative way to jumper up to 57 poles of Manual Motor Controllers (MMC) and Supplementary Protectors (SP).
The advantages of this busbar system are:
30% Installation time savings
Panel space savings
Reduced maintenance
High electrical ratings
Circuit Breaker data sheet links.
Filters
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Breaker Poles
Breaker Poles
Electrical Current Type
Electrical Current Type
Trip Charateristic
Trip Charateristic
UL Breaker Approval - UL 508
UL Breaker Approval
Filter by:
Breaker Poles
Breaker Poles
Electrical Current Type
Electrical Current Type
Trip Charateristic
Trip Charateristic
UL Breaker Approval - UL 508
UL Breaker Approval
Filter by:
Breaker Poles
Breaker Poles
Electrical Current Type
Electrical Current Type
Trip Charateristic
Trip Charateristic
UL Breaker Approval - UL 508
UL Breaker Approval