The Thermal Protector LK1 from Thermik Corporation is a normally closed temperature controller designed for automatic reset. It features a compact and flat design suitable for closely built-up circuits. The device operates using a bimetallic disc that reacts to ambient temperature changes, ensuring quick response sensitivity and low contact stress due to its instantaneous switching capabilities. The LK1 is constructed with high-temperature resistant materials and components, providing excellent long-term performance and reproducible switching temperature values. It has a nominal switching temperature range from 60 ¬8C to 200 ¬8C, with a tolerance of ¬±5 K. The device supports an operational voltage range of up to 500 V AC and has a maximum switching current of 6.3 A. The LK1 is fully insulated in a screw-on housing and includes epoxy and connector cables for ease of installation. It is suitable for applications requiring reliable temperature control and protection.
The switchgear of type series K1 is fixed in a positive lock and is self-aligning between the floor of a conductive housing (1) and a contact cap which is made of steel (2) and insulated from it, plus an integrated stationary silver contact (6) which closes the housing like a button cell. At the same time, the spring snap-in disc (3) which forms the current transfer element bears the movable contact (4) and discharges the flow of current and self-heating from the bimetallic disc (5) by exercising consistent, steady contact pressure. The bimetallic disc (5) is held on the one movable contact (4) which sticks out through this without having to be welded or fixed. As such, it can continually work (exposed) and only reacts to the ambient temperature in the device to be protected. In addition, between the bimetallic disc (5) and and the spring snap-in disc (3) there is an insert made of insulating material (7) in order, for the function itself, to stop insignificant vibration noises as a result of the oscillating bimetallic disc (5) on the spring snap-in disc (3) in applications with uncontrolled, magnetic effects. When the rated switching temperature is reached, the bimetallic disc (5) snaps into its inverted position and pushes the spring snap-in disc (3) downwards. The contact is abruptly opened and the temperature rise of the device to be protected is disrupted. If the ambient temperature now falls, the bimetallic disc (5) snaps back into its start position when reaching the defined reset temperature and the contact is closed again.
| Thermik Corporation | |
|---|---|
| Product Category | Thermal Switches and Thermal Protectors |
| Product Number | LK1 |
| Product Name | Thermal Protector (Temperature Controller) |
| Switch Type | Normally Closed, NC |
| Features | Automatic Reset |
| High Temperature Set Point | 140 to 392 F (60 to 200 C) |
| Maximum Current | 40 amps |
| Maximum AC Voltage | 500 volts |
