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

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.

Click Here for Data Sheet

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

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

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

Circuit Breaker data sheet links.

UL489 (DLS9 Series)		UL508 (DLS8 Series)		UL1077 (DLS7 Series)
	1C_DLS9_(UL489)-DC 1C_DLS9_(UL489) 1D_DLS9_(UL489)-DC 1D_DLS9_(UL489)		1B_DLS8_(UL508) 1C_DLS8_(UL508) 1D_DLS8_(UL508) 1E_DLS8_(UL508) 1G_DLS8_(UL508) 1Z_DLS8_(UL508)		1B_DLS7_(UL1077) 1C_DLS7_(UL1077) 1D_DLS7_(UL1077)

	2C_DLS9_(UL489)-DC 2C_DLS9_(UL489) 2D_DLS9_(UL489)-DC 2D_DLS9_(UL489)		2B_DLS8_(UL508) 2C_DLS8_(UL508) 2D_DLS8_(UL508) 2E_DLS8_(UL508) 2G_DLS8_(UL508) 2Z_DLS8_(UL508)		2B_DLS7_(UL1077) 2C_DLS7_(UL1077) 2D_DLS7_(UL1077)

	3C_DLS9_(UL489) 3D_DLS9_(UL489)		3B_DLS8_(UL508) 3C_DLS8_(UL508) 3D_DLS8_(UL508) 3E_DLS8_(UL508) 3G_DLS8_(UL508) 3Z_DLS8_(UL508)		3B_DLS7_(UL1077) 3C_DLS7_(UL1077) 3D_DLS7_(UL1077)

	4C_DLS9_(UL489) 4D_DLS9_(UL489)		4B_DLS8_(UL508) 4C_DLS8_(UL508) 4D_DLS8_(UL508) 4E_DLS8_(UL508) 4G_DLS8_(UL508) 4Z_DLS8_(UL508)		Contact Altech
UL489 (DLS9 series) - B and Z trip versions available upon request. Please contact Altech for details