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Circuit Breakers

Altech Circuit Breakers deliver UL489, UL1077, and UL508 protection with DIN rail mounting—plus a full range of accessories for flexible industrial control.

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 

UL, DL Series

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

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

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.

Click Here for Data Sheet

Click Here for Data Sheet

Click Here for Data Sheet

DFS - Series

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

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 

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.

Click Here for Data Sheet

Click Here for Data Sheet

Click Here for Data Sheet

Busbars

Link to Busbar Page

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

Click Here for Data Sheet

Click Here for Data Sheet

Click Here for Data Sheet

Circuit Breaker data sheet links.

UL489 (DLS9 Series)UL508 (DLS8 Series)UL1077 (DLS7 Series)
breaker photo

1C_DLS9_(UL489)-DC
1C_DLS9_(UL489)
1D_DLS9_(UL489)-DC
1D_DLS9_(UL489)

breaker photo1B_DLS8_(UL508)
1C_DLS8_(UL508)
1D_DLS8_(UL508)
1E_DLS8_(UL508)
1G_DLS8_(UL508)
1Z_DLS8_(UL508)		breaker photo1B_DLS7_(UL1077)
1C_DLS7_(UL1077)
1D_DLS7_(UL1077)
breaker photo2C_DLS9_(UL489)-DC
2C_DLS9_(UL489)
2D_DLS9_(UL489)-DC
2D_DLS9_(UL489)		breaker photo2B_DLS8_(UL508)
2C_DLS8_(UL508)
2D_DLS8_(UL508)
2E_DLS8_(UL508)
2G_DLS8_(UL508)
2Z_DLS8_(UL508)		breaker photo2B_DLS7_(UL1077)
2C_DLS7_(UL1077)
2D_DLS7_(UL1077)
breaker photo3C_DLS9_(UL489)
3D_DLS9_(UL489)		breaker photo3B_DLS8_(UL508)
3C_DLS8_(UL508)
3D_DLS8_(UL508)
3E_DLS8_(UL508)
3G_DLS8_(UL508)
3Z_DLS8_(UL508)		breaker photo3B_DLS7_(UL1077)
3C_DLS7_(UL1077)
3D_DLS7_(UL1077)
breaker photo4C_DLS9_(UL489)
4D_DLS9_(UL489)		breaker photo4B_DLS8_(UL508)
4C_DLS8_(UL508)
4D_DLS8_(UL508)
4E_DLS8_(UL508)
4G_DLS8_(UL508)
4Z_DLS8_(UL508)		breaker photoContact Altech
UL489 (DLS9 series) - B and Z trip versions available upon request.
Please contact Altech for details		    
Filters
Circuit Breakers Circuit Breakers 2

    1C03UL - DLS9 - UL489 Miniature Molded Case Circuit Breaker

    1C03UL
    AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
    View
    Circuit Breakers Circuit Breakers 2

      2C03UL - DLS9 - UL489 Miniature Molded Case Circuit Breaker

      2C03UL
      AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
      View
      Circuit Breakers Circuit Breakers 2

        3C03UL - DLS9 - UL489 Miniature Molded Case Circuit Breaker

        3C03UL
        AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
        View
        Circuit Breakers Circuit Breakers 2

          1C20UL - DLS9 - UL489 Miniature Molded Case Circuit Breaker

          1C20UL
          AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
          View
          Circuit Breakers Circuit Breakers 2

            1B20UR - UL1077 Recognized Supplementary Protector

            1B20UR
            DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
            View
            Circuit Breakers Circuit Breakers 2

              2B20UR - UL1077 Recognized Supplementary Protector

              2B20UR
              DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
              View
              Circuit Breakers Circuit Breakers 2

                3B20UR - UL1077 Recognized Supplementary Protector

                3B20UR
                DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                View
                Circuit Breakers Circuit Breakers 2

                  1C20UR - UL1077 Recognized Supplementary Protector

                  1C20UR
                  DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                  View
                  Circuit Breakers Circuit Breakers 2

                    2C20UR - UL1077 Recognized Supplementary Protector

                    2C20UR
                    DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                    View
                    Circuit Breakers Circuit Breakers 2

                      2C20UL - DLS9 - UL489 Miniature Molded Case Circuit Breaker

                      2C20UL
                      AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                      View
                      Circuit Breakers Circuit Breakers 2

                        3C20UL - UL489 Miniature Molded Case Circuit Breaker

                        3C20UL
                        AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                        View
                        Circuit Breakers Circuit Breakers 2

                          1D03UL - UL489 Miniature Molded Case Circuit Breaker

                          1D03UL
                          AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                          View
                          Circuit Breakers Circuit Breakers 2

                            1D20UL - UL489 Miniature Molded Case Circuit Breaker

                            1D20UL
                            AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                            View
                            Circuit Breakers Circuit Breakers 2

                              2D03UL - UL489 Miniature Molded Case Circuit Breaker

                              2D03UL
                              AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                              View
                              Circuit Breakers Circuit Breakers 2

                                3C20UR - UL1077 Recognized Supplementary Protector

                                3C20UR
                                DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                                View
                                Circuit Breakers Circuit Breakers 2

                                  1D20UR - UL1077 Recognized Supplementary Protector

                                  1D20UR
                                  DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                                  View
                                  Circuit Breakers Circuit Breakers 2

                                    2D20UR - UL1077 Recognized Supplementary Protector

                                    2D20UR
                                    DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                                    View
                                    Circuit Breakers Circuit Breakers 2

                                      2D20UL - UL489 Miniature Molded Case Circuit Breaker

                                      2D20UL
                                      AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                                      View
                                      Circuit Breakers Circuit Breakers 2

                                        3D03UL - UL489 Miniature Molded Case Circuit Breaker

                                        3D03UL
                                        AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                                        View
                                        Circuit Breakers Circuit Breakers 2

                                          3D20UL - UL489 Miniature Molded Case Circuit Breaker

                                          3D20UL
                                          AC (UL Series) and DC (DL Series) DIN Rail Mounted 17.5mm width Thermal Magnetic 240V, 480Y/277V AC, 50/60Hz 125V DC (1 pole); 125/250V DC (2 pole) 10kA Short Circuit Interrupting Capacity HACR Type 40°C Line/Load reversibleDATA SHEET < Product photo imprint will vary depending on part number selection.
                                          View
                                          Circuit Breakers Circuit Breakers 2

                                            3D20UR - UL1077 Recognized Supplementary Protector

                                            3D20UR
                                            DIN Rail Mounted 17.5mm width per pole Thermal Magnetic 0.3-60A / 480Y/277V AC, 50/60Hz 10kA Short CircuitWithstand Capacity Applications (on the load side of Branch Circuit Protection) include:Sensitive Electronics, Power Supplies, Appliance circuits, etc.DATA SHEET < Product photo imprint will vary depending on part number selection.
                                            View
                                            Circuit Breakers
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