12 V Circuit Breaker 18

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Part	Manufacturer	Circuit Protection Type	Mounting Feature	Rated DC Voltage	Rated Current	Terminal Shape	Minimum Operating Temperature	Rated Breaking Capacity	Actuator Type	Body Length/Diameter	Body Width	Environmental Characteristics	Circuit Function	Body Height	Reference Standard	No. of Poles	Maximum Operating Temperature
1620-3-10A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	10 A	Quick Connect	-40 °C (-40 °F)	150 A	Reset Button	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-3-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	5 A	Quick Connect	-40 °C (-40 °F)	150 A	Reset Button	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-3-15A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	15 A	Quick Connect	-40 °C (-40 °F)	150 A	Reset Button	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-3-30A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	30 A	Quick Connect	-40 °C (-40 °F)	150 A	Reset Button	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-3-20A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	20 A	Quick Connect	-40 °C (-40 °F)	150 A	Reset Button	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-2-10A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	10 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-2-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	5 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-2-15A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	15 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-2-25A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	25 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-3H-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	5 A	Quick Connect	-40 °C (-40 °F)	150 A	Manual Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP40	Trip	1.189 in (30.2 mm)		1	85 °C (185 °F)
1620-2-20A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	20 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
1620-2-30A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	12 V	30 A	Quick Connect	-40 °C (-40 °F)	150 A	Modified Reset	0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50	Trip	0.984 in (25 mm)		1	85 °C (185 °F)
121B30-A2PKA	Eaton Corporation	Thermal Circuit Breaker	Panel Mount	12 V	30 A	Stud	-23 °C (-9.4 °F)		Automatic Reset	1.272 in (32.3 mm)	0.831 in (21.1 mm)	Water Resistant		0.618 in (15.7 mm)	SAE	1	65 °C (149 °F)
CCB25	Littelfuse	Thermal Circuit Breaker	Panel Mount	12 V	25 A	Quick Connect			Automatic Reset						SAE
121B20-B2PKA	Eaton Corporation	Thermal Circuit Breaker	Panel Mount	12 V	20 A	Stud	-23 °C (-9.4 °F)		Automatic Reset	1.272 in (32.3 mm)	0.831 in (21.1 mm)	Water Resistant		0.618 in (15.7 mm)	SAE	1	65 °C (149 °F)
812005ST	Littelfuse	Thermal Circuit Breaker	Panel Mount	12 V	5 A	Stud			Automatic Reset						SAE
812040BP	Littelfuse	Thermal Circuit Breaker	Panel Mount	12 V	40 A	Stud			Automatic Reset						SAE
MMB15	Littelfuse	Thermal Circuit Breaker	Panel Mount	12 V	15 A	Quick Connect			Automatic Reset						SAE

Circuit Breaker

A circuit breaker is an automatic electrical switch that is designed to protect an electrical circuit from damage caused by overcurrent or short circuits. Circuit breakers are commonly used in residential, commercial, and industrial electrical systems, and they are an important safety device that helps prevent electrical fires, equipment damage, and personal injury.

Circuit breakers work by monitoring the amount of current flowing through an electrical circuit. If the current exceeds a preset level, the circuit breaker will trip, or open the circuit, to prevent damage to the electrical system. When the circuit breaker trips, it interrupts the flow of current, which stops the electrical current from flowing and prevents further damage.

Circuit breakers are available in a variety of types and sizes, and they can be classified based on their voltage rating, current rating, and interrupting capacity. Some common types of circuit breakers include thermal circuit breakers, magnetic circuit breakers, and hybrid circuit breakers.

In addition to protecting electrical systems from overcurrent and short circuits, circuit breakers also help improve the reliability and efficiency of electrical systems. They can also be used to switch electrical circuits on and off, which can be helpful in certain applications.