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Home Breakers, Fuses & Circuit Protection Molded Case Circuit Breakers Square D Molded Case Circuit Breakers Square D Molded Case LA Frame Circuit Breakers

LA-Frame Circuit Breaker

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Square D by Schneider Electric has a wide range of Molded Case Circuit Breakers that are designed with thermal magnetic protection. Thermal trip element circuit breakers protect a circuit against a small overload that continues for a long time. The larger the overload, the faster the circuit breaker will trip. The thermal element will also protect against temperature increases. Magnetic circuit breakers will trip instantly when the preset current is present. Thermal magnetic circuit breakers contain both types of protection in a single unit. 

LA and LH Molded Case Circuit Breakers provide thermal magnetic protection from 125 to 400 Amps as part of the Square D portfolio of molded case circuit breakers. They are available in 2 and 3 pole design with unit-mount, I-line or rear-connect constructions. LH molded case circuit breakers are used in industrial enclosures, switchboards, panelboards, busway plug-in units, combination starters and motor control centers.

Products

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Schneider Electric LHL3640036M LA Frame MOTOR CIRCUIT PROTECTOR 600V 400A
Schneider Electric LHL3640036M LA Frame MOTOR CIRCUIT PROTECTOR 600V 400A
$17095.50
Schneider LHL3640036M AL400LA Compliant, EU RoHS Declaration China RoHS declaration, Product out of China RoHS scope. Substance declaration for your information. Halogen free plastic parts product 115.06 lbf.in (13 N.m 0.07-0.47 in² (42-304 mm² AWG 1-600 kcmil, 115.06 lbf.in (13
Schneider Electric LHL3640035M LA Frame MOTOR CIRCUIT PROTECTOR 600V 400A
Schneider Electric LHL3640035M LA Frame MOTOR CIRCUIT PROTECTOR 600V 400A
$11397.00
Schneider LHL3640035M AL400LA Compliant, EU RoHS Declaration China RoHS declaration, Product out of China RoHS scope. Substance declaration for your information. Halogen free plastic parts product 115.06 lbf.in (13 N.m 0.07-0.47 in² (42-304 mm² AWG 1-600 kcmil, 115.06 lbf.in (13
Schneider Electric LAL3640036M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
Schneider Electric LAL3640036M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
$6928.50
Schneider LAL3640036M Motor Circuit Protector 400 A 3P Unit mount UL Listed, CSA, IEC 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-m
Schneider Electric LAL3640035M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
Schneider Electric LAL3640035M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
$6928.50
Schneider LAL3640035M Motor Circuit Protector 400 A 3P Unit mount IEC, UL Listed, CSA 1750 A 3500 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-m
Schneider Electric LAL3640032M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
Schneider Electric LAL3640032M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
$6928.50
Schneider LAL3640032M Motor Circuit Protector 400 A 3P Unit mount IEC, UL Listed, CSA 1250 A 2500 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-m
Schneider Electric LAL3640031M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
Schneider Electric LAL3640031M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC/250VDC, 400A, 3P
$6928.50
Schneider LAL3640031M Motor Circuit Protector 400 A 3P Unit mount IEC, UL Listed, CSA 1125 A 2250 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-m
Schneider Electric LAL3640028M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC, 400A, 3P
Schneider Electric LAL3640028M LAL LA Frame MOTOR CIRCUIT PROTECTOR, 600VAC, 400A, 3P
$6928.50
Schneider LAL3640028M Motor Circuit Protector 400 A 3P Unit mount UL Listed, IEC, CSA 750 A 1500 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-magnetic AWG
Schneider Electric LAL36400WB FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P,
Schneider Electric LAL36400WB FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P,
$10946.25
Schneider LAL36400WB Circuit breaker 400 A 3P Unit mount UL Listed, IEC, CSA 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-magnetic A
Schneider Electric LAL36400V 3P 600VAC/250VDC 400A LAL FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER WITH VISI-BLADE
Schneider Electric LAL36400V 3P 600VAC/250VDC 400A LAL FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER WITH VISI-BLADE
$12471.75
Schneider LAL36400V Circuit breaker 400 A 3P Unit mount CSA, UL Listed, IEC Visi-blade 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-
Schneider Electric LAL36400MB FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER, 600V, 400A, 3P, SHORT HANDLE
Schneider Electric LAL36400MB FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER, 600V, 400A, 3P, SHORT HANDLE
$6928.50
Schneider LAL36400MB Circuit breaker 400 A 3P Unit mount CSA, IEC, UL Listed 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-magnetic A
Schneider Electric LAL364008041 LAL LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P, CONT WIRE TERMINAL
Schneider Electric LAL364008041 LAL LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P, CONT WIRE TERMINAL
$12471.75
Schneider LAL364008041 Circuit breaker 400 A 3P Unit mount CSA, IEC, UL Listed 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-magnetic
Schneider Electric LAL364002100 FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P, N/O BELL ALARM
Schneider Electric LAL364002100 FA/LA LA Frame MOLDED CASE CIRCUIT BREAKER 600V, 400A, 3P, N/O BELL ALARM
$11094.75
Schneider LAL364002100 Circuit breaker 400 A 3P Unit mount UL Listed, CSA, IEC 2000 A 4000 A 11 in (279.40 mm 6 in (152.40 mm 5.84 in (148.34 mm 600 V AC, 250 V DC Lugs load, Lugs line 42 kA 240 V AC, 30 kA 480 V AC, 22 kA 600 V AC, 10 kA 125 V DC, 10 kA 250 V DC Thermal-magnetic

 

What is a Circuit Breaker?

There are two different types of technologies that are commonly used in circuit breakers. 

Magnetic Breakers

Magnetic Breakers are designed to react to short circuits or sharp spikes in voltage and current. The more current that passes through the breaker’s electromagnet, the stronger the magnet becomes. When the current exceeds the rating for that particular breaker, the magnetic force becomes strong enough that it will pull the contact back and disconnect it from the other contact, disconnecting power from the device.

Thermal Protection Breakers

Thermal Protection Breakers protect against a sustained overcurrent, or a higher current, for a longer period of time. Thermal protection uses a Bimetal strip that will bend the contacts away from each other to disconnect power. Thermal Magnetic Breakers are the most common type of circuit breakers. They combine magnetic technology to protect against short circuits or sharp spikes and thermal technology that protects against sustained overcurrent for a long period of time.

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