Miniature electric fire detection switches with thermal glass bulb

Simple device for fire detection in buildings. This device is operating electrical contacts for remote alarm and simultaneous control of electrical servo-controls such as electric cylinders, electric motors or solenoids, for opening or closing air conditioning dampers, doors, sunroofs, and openings in building facades.

Contact Material

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Description

Applications

Simple device for fire detection in buildings. This device is operating electrical contacts for remote alarm and simultaneous control of electrical servo-controls such as electric cylinders, electric motors or solenoids, for opening or closing air conditioning dampers, doors, sunroofs, and openings in building facades.

Main Features

Thermal sensitive part: Thermal bulb.

Operation: The break of the bulb operates an electric switch.

Mounting: Body with 2 holes for mounting on the wall or ceiling.

Electrical contact: Opening when the bulb breaks.

Rating: 16A (4A) 250V alt.; 10A (1A) 400V alt.; 4A (100mA) 24 and 48VDC. Compatible with 24V and 48V, 500 N electro-magnet.

Selection of gold-plated silver contact avoids oxidation, and allows use on low level electronic circuits. NB: use on circuits with a voltage greater than 12V and at more than 1A may vaporize the protective gold layer.

Body: 17 x 58 x 22 mm ceramic, with UV-resistant black PA66 cover,

  • Flammability: UL94V0 and GWFI 960°C.
  • Deformation temperature under load: 225°C. (ISO 75-2, 1.8 MPa).
  • Room temperature class T200°C.

Electrical connection: Screw terminals for wires up to 2.5mm².

Maintenance: The replacement of the 5x20mm thermal bulb is possible after unscrewing the PA66 cover

Options: Customization and customer labelling, plastic cover in red or cream color

Main references

Downloads

Datasheets

Drawings

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Technical informations associated to this product

  • Historical and technical introduction of fusible alloys and fire safety fusible links

    The earliest known piece made of lead and tin alloy seems to be an Egyptian vase found in Abydos, dated around 1400 BC. During the Roman Empire, lead was used for the construction of water pipes. Melting at 325°C,

  • Temperature sensing principles

    The bimetal strip is formed by two co-laminated metal. One has a high coefficient of expansion, the othera lower or zero. When the strip is heated, it bends proportionally to the temperature. These bimetal blades are generally flat and fixed at one end. But they can be wound in a spiral shape, although this arrangement most often used in the construction of thermometers.

  • Electrical contacts

    As numerous mechanisms exist, we decided not to distinguish on the basis of constructive technique, but according to their operation speed, which is the key element.

  • Electrical protection classes

    The housings are designed to protect electrical equipment located inside. This protection must be considered in the electrical and environmental angles.)