Automatic Miniature Fire Extinguisher

The AMFE detects and extinguishes fires in cabinets such as electrical equipments
and thus prevents the spread of fire.

Built-In Security

Helios‘s AMFE (Automatic Miniature Fire Extinguisher) reliably protects devices and equipment in industry, household and consumer electronics such as cabinets, home appliances, televisions, etc. against the dangers of fire. The AMFE detects and extinguishes the fire inside the device, preventing the spread of a fire.

The advantages at a glance

  • Easy to use
  • Maintenance-free
  • Easy to install (retrofittable)
  • Variety of customer specific operating & releasing temperatures available
  • No water being used (gas)
  • Scalable
  • Robust and shock tolerant
  • 3M NOVEC or CO2 as extinguishing agent
  • Usable in various applications (home, industry, automotive, etc.)
  • Mechanical release; no electric power supply required
  • Release mechanism: qualified in the automotive and sprinkler industry

Additional AMFE model variants


AMFE with sensor connections

The AMFE not only releases the extinguishing gas but also signals that it has. In installations where accessibility is limited, the AMFE can be connected to a monitoring system by two connectors for reading a signal. Permanently controlling if the AMFE has been initiated (e.g. line control through a PLC or monitoring device) allows for precise knowledge about the status of whether and where a fire might have started in an otherwise hard to reach installation. The S-AMFE is rated for typical PLC signals of 24V/48V and 1000mA. The connectors are standardized (6,3mm blade terminals), but customizations are possible.


Two simultaneously triggering connections

I-AMFE provides redundant provision of the extinguishing agent with simultaneous triggering of two connected cylinders. Alternatively, increasing the protected volume acc. to NFPA 12/NFPA 2001 is possible by installing the I-AMFE with two cylinders. It is also possible to connect two cylinders with different extinguishing agents for applications with other, very specific, fire extinguishing requirements. In certain countries, the largest possible CO2 cylinder size which can be used without a special authorization is limited; cases where I-AMFE can still be used for maximizing the possible protected volume.


AMFE which can additionally be triggered remotely

The R-AMFE works like a conventional AMFE, releasing the extinguishing gas when the thermobulb bursts after the activation temperature has been reached by heat (as in a sprinkler). Additionally, the R-AMFE can be remotely triggered by activating a current signal into the R-AMFE causing a fast and precise increase of the heat at the bulb, ultimately resulting in a burst of the thermobulb assembled and release of the extinguishing gas. R-AMFE can also work much faster than a traditional AMFE if controlled by a monitoring device which also reads e.g. smoke detector signals and, upon the early detection of smoke, initiates the signal to release the R-AMFE even before significant enough heat buildup. The applied current defines the time until the R-AMFE is initiated. As application requirements for the R-AMFE are customer specific, consulting the manufacturer is required to define electrical and mechanical details to guaranty reliable and sufficient operation.

In control cabinets, fire can quickly lead to a disaster. The AMFE extinguishes reliably and precisely.

Application Variety

The application spectrum of the AMFE is diverse: It ranges from technical household appliances, exhibits and collections to solutions in a vast variety of applications, both at home or in the industry.

The Challenge

Washing machines, televisions or industrial power supplies – fires in technical devices are a continuously increasing serious threat. And not only at homes, damages caused by fires are increasing. There is also a significant risk of fire in the industry and automotive sector. Another example are highly valued collections which are subject to persistent fire hazard. The challenge is to automatically, energy-supply independently, detect and extinguishing fires already in the early stage stage, consequently providing more safety. A system is needed, that can extinguish these fires reliably, fast and easily at any time and without external resources inside a housing.

The Function

Due to rising heat in a fire scenario the pressure inside the glass bulb increases. After the predetermined operating temperature of the heat sensitive glass bulb is reached, the glass bulb bursts into small fragments and triggers a mechanism that releases the gas from the cylinder. The extinguishing medium is released through the holes in the outlet body and extinguishes the fire when the fire is still in an early stage. The quick operation and the effective extinguishing of the fire prevents further expansion of the fire and and helps keeping damage small.

No rarity: A fire in an electric appliance (or on a PCB)

Solution: The AMFE reliably extinguishes a fire

Technical Specifications

Design help / Configuration

Sizing the AMFE, (the necessary quantity of locally extinguishing agent) has to be carried out in accordance with the locally relevant standards (e.g. NFPA 12, NFPA 2001, VdS 2093, EN 15004)

  • Dimensions (without cylinder): ø 16 mm x 62 mm/0,63“ x 2,52“
  • Minimum installation depth: 20 mm/0,79“ (w/o cylinders)
  • Activating temperature: 57°C – 260°C/134,6° F – 500° F
  • Extinguishing agents: 3M NOVEC, CO2
  • Lifetime: 9 years + (for the cylinders)
  • Maintenance free
  • Lifetime: ∞ for release mechanism (see manual for details)

(Click on the image to view full size)


The parts below are available as standard. Other sizes and temperatures are available upon request.


 Part Name Description
10899 AMFE SR3 68 AMFE, with Helios SR3 68°C/155°F bulb
10900 AMFE SR3 79 AMFE, with Helios SR3 79°C/175°F bulb
10901 AMFE SR3 93 AMFE, with Helios SR3 93°C/200°F bulb

AMFE & S-AMFE are also available in stainless design


Part Name Description
11043 S-AMFE SR3 68 AMFE, with Helios SR3 68°C/155°F bulb and sensor connection
11044 S-AMFE SR3 79 AMFE, with Helios SR3 79°C/175°F bulb and sensor connection
11045 S-AMFE SR3 93 AMFE, with Helios SR3 93°C/200°F bulb and sensor connection

CO2 Cylinders

 Size Part Name
#0 n.a. n.a.
#1 10945 CO2 35g/100°C
#2 10946 CO2 60g/100°C
#3 10947 CO2 135g/100°C
#4 10948 CO2 200g/100°C
#5 10949 CO2 350g/100°C


 Size Part Name
#0 11100 Cylinder NOVECTM 26ml
#1 11101 Cylinder NOVECTM 72ml
#2 11102 Cylinder NOVECTM 120ml
#3 11103 Cylinder NOVECTM 241ml
#4 11104 Cylinder NOVECTM 360ml
#5 11105 Cylinder NOVECTM 603ml

Marking / Traceability

Each AMFE is marked with a label which, in addition to the type, production date and article number, also includes a batch number. This batch number guarantees a 100% traceability of all used components.Thus, not only information about the components being used can be retrieved, but also details about the executed quality tests during production.

AMFE – 3M™ NOVEC™ engineered fluid & pipe connection

Following our vision “A world where everyone is protected against the dangers of fire, everywhere and anytime”, we have further improved our automatic miniature fire extinguisher AMFE.

Additionally to the standard CO2 or N2 extinguishing agents, we now offer the AMFE series in combination with cylinders filled with 3M™ NOVEC™. This allows our customers to use the AMFE effectively to protect even larger devices with greater volume than ever before, at still the small size of a standard gas cylinder.

We also offer the AMFE series with connectivity to attach a piping system to the AMFE, for using external, potentially larger, extinguishing agent containers. This allows our customers to use the AMFE effectively to protect even larger devices with greater volume than before, while not compromising the available space inside a cabinet, device or appliance.

Yet, the proven functionality of Helios’s AMFE remains the same: the glass bulb (like being used in sprinklers) bursts when the set temperature is reached. A spring operated mechanism is activated and opens the cylinder / the seales gas pipe; the agent is released and extinguishes the fire.


AMFE with pipe connection

To find out more about AMFE or any other fire-prevention products call Helios on 0161 226 1885