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

LH-Frame Circuit Breakers

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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 LHL36400MB LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P, SHORT HANDLE
Schneider Electric LHL36400MB LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P, SHORT HANDLE
$11397.00
Schneider LHL36400MB 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic A
Schneider Electric LHL364001021 LH Frame MOLDED CASE CIRCUIT BREAKER 600V 400A
Schneider Electric LHL364001021 LH Frame MOLDED CASE CIRCUIT BREAKER 600V 400A
$19134.00
Schneider LHL364001021 Compliant, EU RoHS Declaration China RoHS declaration, Product out of China RoHS scope. Substance declaration for your information. Halogen free plastic parts product 00935 - LAL/LHL BRKR, SW, MAG-GARD DE2 1 lb(US (0.45 kg No MX Green Premium product Yes Ye
Schneider Electric LHL36400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P
Schneider Electric LHL36400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 400A, 3P
$11397.00
Schneider LHL36400 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36350 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 350A, 3P
Schneider Electric LHL36350 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 350A, 3P
$11397.00
Schneider LHL36350 Circuit breaker 350 A 3P Unit mount IEC, CSA, UL Listed 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 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG 1-600 kcmil aluminium/copper1, AWG 1-250 kcmil
Schneider Electric LHL36300 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 300A, 3P
Schneider Electric LHL36300 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 300A, 3P
$11397.00
Schneider LHL36300 Circuit breaker 300 A 3P Unit mount CSA, UL Listed, IEC 1500 A 3000 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36250 LHL LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 250A, 3P
Schneider Electric LHL36250 LHL LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 250A, 3P
$11397.00
Schneider LHL36250 Circuit breaker 250 A 3P Unit mount CSA, UL Listed, IEC 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36225 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 225A, 3P
Schneider Electric LHL36225 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 225A, 3P
$11397.00
Schneider LHL36225 Circuit breaker 225 A 3P Unit mount UL Listed, CSA, IEC 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36200 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 200A, 3P
Schneider Electric LHL36200 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 200A, 3P
$11397.00
Schneider LHL36200 Circuit breaker 200 A 3P Unit mount UL Listed, IEC, CSA 1000 A 2000 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36150 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 150A, 3P
Schneider Electric LHL36150 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER, 600VAC/250VDC, 150A, 3P
$17095.50
Schneider LHL36150 Circuit breaker 150 A 3P Unit mount IEC, CSA, UL Listed 750 A 1500 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG
Schneider Electric LHL36000MV LHL LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC, 400A, 3P, WITH VISI-BLADE
Schneider Electric LHL36000MV LHL LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC, 400A, 3P, WITH VISI-BLADE
$7792.50
Schneider LHL36000MV Circuit breaker 400 A 3P Unit mount CSA, UL Listed, IEC Visi-blade 8000 A 9600 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic A
Schneider Electric LHL36000M LHL MOTOR CIRCUIT PROTECTOR, 600VAC, 400A, 3P
Schneider Electric LHL36000M LHL MOTOR CIRCUIT PROTECTOR, 600VAC, 400A, 3P
$6493.50
Schneider LHL36000M Circuit breaker 400 A 3P Unit mount IEC, CSA, UL Listed 8000 A 9600 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG 1-600 kcm
Schneider Electric LHL26400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC/250VDC, 400A, 2P
Schneider Electric LHL26400 LHL LH LH Frame MOLDED CASE CIRCUIT BREAKER,600VAC/250VDC, 400A, 2P
$9543.00
Schneider LHL26400 Circuit breaker 400 A 2P 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 25 kA 600 V AC, 65 kA 240 V AC, 35 kA 480 V AC, 50 kA 250 V DC, 50 kA 125 V DC Thermal-magnetic AWG

 

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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