Electro Thermal Fusible Link – TL-2 | 72°C Melt | Boiler House & Burner Fire Safety
Thermal electro fusible links are ideal for use within boiler houses, air heaters, burners and all other installations that could pose an ignition risk. These units are mounted above the potential heat source. When exposed to flame and elevated temperatures, these units melt at 72°C and interrupt the flow of electricity to the gas valve, interlock systems or alarm circuit.
TL-2 is a thermal fusible link used as a one shot fire detection circuit breaker. This product is used by installing it over an area that may have a high temperature such as near a burner, air heater or boiler. The faceplate is positioned down ward to ensure that the rising temperature caused by an igniting flame will melt the fusible component. If a fire occurs and raises the surrounding temperature to 72°C the fusible metal link melts causing a physical break in the electrical circuit. This break cuts off power to the connected gas valve, fire valve, interlocks or alarm.
Fusible links like the TL-2 do not require any electronics therefore they cannot fail due to electronic failure. They are also mechanical devices designed to open at the rated temperature. After melting, the whole device must be replaced. The housing of the TL-2 is made of steel and has a 20mm conduit opening which meets common commercial electrical requirements. There are ventilation holes on each side of the housing (these should never be blocked) through which the heat can reach the fusible element.
Key Features & Benefits
Melts at 72°C - Reliably opens the circuit at the rated fire-detection temperature.
Interrupts Gas Valve, Interlock or Alarm Circuit - Cuts electrical supply to any connected device when triggered.
Passive Single-Use Device - No electronics - mechanically certain operation. Replace entire unit after activation.
Perforated Cover Facing Downwards - Correct mounting orientation essential for proper heat access to the fusible element.
20mm Conduit Entry - Standard conduit connection for commercial electrical installations.
Steel Enclosure - 75 × 50 × 30mm
10A, 200/250V AC, Single Phase, 50Hz
Installation Notes
Mount with perforated cover facing downwards - this allows heat from a fire below to rise into the enclosure and reach the fusible element.
Do not obstruct the ventilation holes in the sides of the box - this will prevent heat from reaching the element and may delay or prevent operation.
Position above the fire hazard - above a burner, air heater or boiler - at the appropriate height for the expected fire temperature profile.
This is a one-shot device - replace the complete unit after any activation.
Ideal For
Boiler houses - gas valve fire interruption
Air heater and burner installations
Fire valve control circuits in commercial gas installations
Alarm circuit fire detection above heat sources
Passive fire-detection thermal fusible link for gas valve and fire circuit interruption - 72°C melt. Order today.
Specification
Electro Thermal Fusible Link Specification
Model
TL-2
Product Type
Electro Thermal Fusible Link
Melt Temperature
72°C (162°F)
Electrical Rating
10A maximum
Voltage
200/250V AC, single phase, 50Hz
Enclosure Material
Steel
Dimensions (L × W × D)
75 × 50 × 30mm
Conduit Entry
20mm
Mounting
Perforated cover facing downwards — ventilation holes must not be obstructed
Reset
One-shot — replace complete unit after activation
Suitable Applications
Boiler houses, air heaters, burners, fire valve and alarm circuits
Features
Electro Thermal Fusible Link Features
Melts at 72°C - Reliably opens the circuit at the rated fire-detection temperature.
Interrupts Gas Valve, Interlock or Alarm Circuit - Cuts electrical supply to any connected device when triggered.
Passive Single-Use Device - No electronics - mechanically certain operation. Replace entire unit after activation.
Perforated Cover Facing Downwards - Correct mounting orientation essential for proper heat access to the fusible element.
20mm Conduit Entry - Standard conduit connection for commercial electrical installations.
