Thermal Overcurrent Circuit Breakers

Typical Applications

Thermal circuit breakers (circuit protectors, resettable fuses, circuit breakers for equipment protection) are ideally suited to overload protection of motors, transformers, magnetic valves, on-board electrical systems and low voltage lines.

Technology

The trip time of thermal circuit breakers depends on the height and of the duration of the overload current and the ambient temperature. With higher current ratings, the bimetal or hot wire is heated up until the defined trip time is reached and the device ensures genuine physical isolation of the contacts.

104

Thermal circuit breaker, integral type,
single pole

104-PR

Thermal circuit breaker for pcb mounting,
single pole

105

Thermal circuit breaker
for snap-in mounting, single pole

106

Thermal circuit breaker for threadneck
panel mounting, single pole

127

Thermal circuit breaker
with manual release button,
plug-in or snap in panel mounting

129-L11-H-KF

Thermal automotive circuit breaker with
manual release, for base mounting

157

Thermal single pole circuit breaker,
threadneck panel mounting

1110

Push-push thermal switch/circuit breaker combination, single pole

1115

Single pole thermal reset circuit breaker

1140-E

Single pole thermal circuit breaker,
integral type

1140-F

Thermal circuit breaker for snap-in
panel mounting, single pole

1140-G

Thermal circuit breaker for threadneck
panel mounting, single pole

1140-G15

Thermal circuit breaker for threadneck
panel mounting, double pole,
one pole thermally protected

1160

Thermal automotive circuit breaker
with automatic reset function

1170

Miniaturised thermal automotive circuit breaker
with colour-coded manual release

1180

Thermal circuit breaker, plug-in type,
single pole, switching function optional

1410-F1

Thermal circuit breaker for snap-in panel
mounting, rocker operated, fast acting

1410-L1

Miniaturised thermal circuit breaker
for pcb mounting, fast acting

1410-L2

Miniaturised thermal circuit breaker
for pcb mounting, fast acting

1410-L4

Miniaturised thermal circuit breaker
for pcb mounting, fast acting

1410-G1

Miniaturised thermal circuit breaker for
threadneck panel mounting, fast acting

1610-21

Automotive thermal circuit breaker,
colour-coded housing,
standard fuseblock mounting

1610-H2

Automotive thermal circuit breaker
with manual release option

1610-92

Automotive thermal circuit breaker
with automatic reset function

1620

Single pole, thermal miniaturised circuit breaker designed for automotive applications

1626

Single pole, thermal miniaturised circuit breaker designed for automotive applications

1658

Single pole thermal reset circuit breaker in a miniaturised design intended for threadneck or snap-in mounting, dimensions: 32.0 x 27.0 x 13.6 mm.

3120-F

Thermal Circuit Breaker 3120-F...

3120-N

3120-N, thermal circuit breaker, snap-in mounting, 1-pole, 2-pole

3130-F

Thermal circuit breaker with rocker
actuation, single, double or three pole

3131-A

Thermal circuit breaker with rocker actuation,
single pole, water splash protected (IP66)

3131-B

Single pole three-position switch, water splash protected (IP66)

3140

Thermal circuit breaker with push buttons,
three pole

4130

Thermal circuit breaker for threadneck
panel mounting

2-5000

Thermal circuit breaker for flange mounting
and manual release option

2-5200

Thermal automotive circuit breaker,
plug-in type, with manual release option

2-5700

Thermal circuit breaker for threadneck
panel mounting, push-push actuation

2-6400

Thermal circuit breaker for threadneck
panel mounting, with auxiliary contacts

2-6500

Single pole bimetal operated motor protection control, surface mounting, autoreset

Resources:

Fuse vs. circuit breaker: How to choose the right device for your application

Is a fuse or circuit breaker best for your design? Here are some pointers to help you decide. Three main factors go into choosing between circuit breakers and fuses: Convenience for the user, cost, and degree of protection. This white paper will give you guidance on what circuit protection device is best for your equipment.

Read White Paper

12 Most Common Mistakes When Specifying Circuit Protection for Equipment

It's only a circuit breaker. Yet there is enough complexity and confusion when it comes to specifying circuit protection that many engineers are designing equipment with too little or too much protection. Under protected circuits leave equipment vulnerable to damaging electrical surges. Over protected circuits add cost and can lead to nuisance tripping. Like Goldilocks and the three bears, the goal is to specify circuit protection that is "just right".

Read White Paper

Virtual Assistant
Quickselect: Products Jobs Support About E-T-A
Call An Expert
Sie haben Fragen, Anregungen oder Wünsche? Wir beraten Sie gerne.