Relays & switch components
Reliable control, switching and protection of electrical circuits
Relays and switch components are used to control, protect and safely disconnect electrical systems in industry, energy, automotive and other technically demanding applications. The right component ensures stable operation, reduces the risk of damage and contributes to the long life of systems and equipment.
Swelex offers a wide range of relays, contactors and thermal switches - including proven solutions for temperature and motor protection.
Thermal switches & Klixon products
Klixon products from Sensata are the industry leader in temperature-controlled switching and overheat protection. With proven bimetallic technology, they offer high reliability, long life and fast thermal response in applications where reliable protection is essential.
Areas of use include:
- Engines
- Transformers
- Battery system
- Heating systems
- Industrial electronics
Klixon 5003 series
Bimetallic thermostat for surface and air sensing.
- Low profile design
- 1/2” disc button
- RoHS compliant
- Stable and reliable temperature switching
Klixon 1NT series
Cost-effective bimetallic thermostat.
- Wide temperature range
- Silver or gold-plated contacts
- Solder, clamp or flat pin connection
- Sold individually
Klixon 3NT series
Encapsulated thermostat with automatic reset.
- Moisture and dust-proof design
- Rapid thermal response
- Up to 135°C
- Lifetime up to 100 000 cycles
Engine protection
Motor protectors are designed to protect electric motors against overheating, overloading and abnormal operating conditions. By breaking the circuit at critical temperatures, the risk of damage, downtime and costly repairs is minimised.
We offer compact and reliable solutions based on proven bimetallic technology, suitable for industrial and technically demanding environments.
Klixon 2MM series
- Compact miniature shelter
- Reliable overheating protection
- For appliance and motor protection
Klixon 9700 series
- Compact engine cover
- Robust construction
- High reliability
Klixon YS11 series
- Miniature design
- Proven technology
- Suitable for compact installations
Frequently asked questions (FAQ)
What is a thermal circuit breaker?
- A thermal circuit breaker uses bimetallic technology to break an electrical circuit at too high a temperature. It is used to protect motors, transformers and other equipment from overheating.
When is engine protection needed?
- Motor protectors are used in applications where electric motors are at risk of overload, overcurrent or overheating. They prevent damage and reduce the risk of downtime.
What is the difference between a thermostat and a motor protector?
- A thermostat regulates temperature by breaking or closing a circuit at a preset temperature. A motor protector is specifically adapted to protect motors and is often integrated into or mounted directly on the motor.
Does Swelex help with dimensioning?
- Yes, we help with the selection of relays, contactors and thermal protections based on the application's current, voltage, environmental requirements and safety level.