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A fire extinguishing capsule is not a traditional fire extinguisher. It is a self-contained, heat-triggered micro-suppression unit that releases fire suppressant automatically at the source of ignition. Our capsules are engineered for enclosed electrical spaces, lithium battery systems, EV components, energy storage cabinets, and industrial equipment where a fire can start in seconds and spread before anyone can respond.
Instead of waiting for a person to find a red cylinder, pull a pin and aim, the capsule stays dormant for years, senses abnormal heat, ruptures at a set temperature, and deploys clean agent directly inside the hazard zone.
A fire extinguishing capsule uses micro-encapsulation technology: a core fire-suppressing agent is sealed inside a stable shell. The shell can be a polymer microsphere, a thermal film, a gel layer, or a sealed module.
Core agent: typically FK-5-1-12 / perfluorohexanone, clean aerosol, or halogen-free suppressant.
Shell: engineered to remain stable under normal heat, humidity and vibration, then rupture when the trigger temperature is reached.
Form factor: microcapsules, stickers, pads, tapes, ropes, balls, or embedded material additives.
Typical capsule size ranges from about 20 μm to 250 μm for microcapsule powder, while finished products include patches, blocks and modules sized for cabinets, battery boxes and enclosures. [2,8](@ref)
The process is passive, fast and does not need wiring or external power.
The capsule shell keeps the agent sealed. It resists normal operating temperature, moisture and aging, so the suppressant does not evaporate or degrade during storage.
When a local hotspot appears—usually around 140°C to 200°C, depending on shell design—the wall softens, melts or bursts from internal pressure.
The suppressant discharges at the ignition point. Clean liquid agents vaporize quickly; aerosol agents expand to fill the enclosure.
Cooling: vaporization absorbs heat and lowers fuel temperature.
Oxygen dilution: generated gas or aerosol reduces available oxygen near the flame.
Chain reaction interruption: active particles capture combustion radicals, stopping the chemical reaction that sustains the fire.
This combined action can respond within seconds and is especially effective in the early fire stage. [1,17](@ref)
No human action required: activates automatically, even when the site is unattended.
No power or piping: ideal for retrofit in tight enclosures.
Clean agent: non-conductive, low residue, safer for electronics and sensitive equipment.
Point-of-origin response: suppresses the fire where it starts, not after it spreads.
Long shelf life: many designs offer 5 to 10 years of maintenance-free standby protection.
Flexible integration: can be a sticker, tape, rope, pad, paint additive or embedded component.
Overload, arc fault and loose connections cause hidden heat. A capsule patch inside the panel reacts before the fire reaches cables or busbars.
In battery modules, one cell can trigger thermal runaway. Embedded capsules near cell gaps release suppressant locally, slowing propagation and buying time for isolation and evacuation. [18,22](@ref)
Battery boxes, charging equipment, inverter compartments, engine bays and vehicle control units benefit from compact, vibration-resistant modules that need no external trigger.
Server racks, communication cabinets and photovoltaic inverters often run unattended. Capsules provide silent, 24/7 first-response protection without powder contamination.
Microcapsules can be mixed into coatings, adhesives, composites, cables, fabrics and insulation to make the material itself self-suppressing.
Fire extinguishing sticker / pad: adhesive backing, placed inside sockets, distribution boxes and small enclosures.
Fire extinguishing tape / rope: follows cable trays, battery connections and narrow gaps.
Microcapsule masterbatch: added into paint, epoxy, PU, silicone or plastic compounds.
Capsule ball or block: for larger enclosures, equipment cavities and storage units.
Custom embedded solution: capsule size, trigger temperature, agent type and carrier material tuned to the application.
Our team works on capsule formulation, shell stability, agent loading, trigger calibration and real-fire testing. Every batch is checked for:
Shell integrity: no premature leakage under heat, humidity and vibration.
Trigger accuracy: consistent rupture within the designed temperature window.
Agent performance: cooling, oxygen dilution and radical suppression verified by bench tests.
Material compatibility: safe contact with plastics, metals, electronics and battery materials.
Enclosure sizing: protected volume calculated from agent mass, enclosure seal level and fire load.
We also support sample evaluation, application testing and installer documentation so the product performs in the field, not only in the lab.
Fire extinguishing capsules are a first-response device. They are designed to stop small early fires and slow fire growth. They do not replace building sprinklers, gas suppression systems or certified extinguishers where local codes require them.
Installation best practices:
Place near the hazard: batteries, terminals, controllers, cables and heat sources.
Keep discharge path clear: do not block the capsule with wiring or components.
Match the enclosure volume: use the correct capsule count and agent capacity.
Check after activation: triggered units are single-use and must be replaced.
Verify compliance: confirm fire class, certification and local regulation before project use.
Class A: solids such as cable jackets, wood, foam, textiles.
Class B: flammable liquids, oils and solvents.
Class C / E: live electrical equipment, using non-conductive clean agents.
Lithium battery fires: require fast cooling plus chain-reaction suppression, not only oxygen removal.
We select FK-series clean agents, aerosol formulations or halogen-free blends based on equipment sensitivity, enclosure size and environmental requirements.
We are not a generic safety-shop reseller. We focus on capsule chemistry, enclosure engineering and application validation. That means:
Custom trigger temperature: tuned for battery, electrical or industrial environments.
High agent retention: stable shell prevents挥发 and performance loss during storage.
Clean discharge: less residue, less corrosion risk, safer for sensitive electronics.
Scalable supply: from R&D samples to bulk production and OEM forms.
Technical partnership: we help integrators size, test and certify the solution.
No. Once the shell ruptures and the agent releases, the unit must be replaced. The value is automatic response, not repeat use.
Most thermal capsules do not. They activate from heat alone. Some system versions can add sensors or alarms, but the core suppression device remains passive.
Common ranges are 140°C to 200°C, but we can customize lower or higher thresholds depending on the equipment and false-trigger risk.
Clean-agent capsules are designed to be non-conductive and low-residue. They are safer than water, foam or dry powder for servers, controllers and battery management hardware.
It is most effective at the early stage: cooling the cell, suppressing the flame and reducing propagation. Large pack protection still needs ventilation, thermal barriers and system-level design.
A fire extinguishing capsule turns passive material into an active fire barrier. For EVs, energy storage, electrical cabinets and unattended equipment, it is one of the most practical ways to catch a fire in the first few seconds—automatically, locally and without maintenance.
If your risk lives inside a closed enclosure, the capsule should live there too.
Request a sample or application review: tell us your enclosure type, internal volume, target trigger temperature and fire class. We will recommend the right capsule form, agent and layout for testing.