What happens when smoke detector emits smoke or starts burning by capacitor failure?
Smoke alarms can fail to alarm when smoke or fire is present. A capacitor in the alarm can burn out, releasing smoke and melting the cover.
Hitachi AIC has developed a smoke free NMC Niobium Capacitors for applications where smoke or fire can be critical. See real experiment results with Polymer Aluminum Capacitor versus Niobium NMC capacitors:
NMC Type Niobium Capacitors Specifications
A Niobium capacitor is a polar capacitor which dielectric is a Niobium pentoxide formed on the surface of the sintered Niobium metallic powder. The NMC Niobium Capacitors are environmentally-friendly and meet lead-free RoHS Directive.
Specifications:
Operational Temperature Range: -55~ +105°C
Maximum Working Temperature without Voltage Derating: 85°C (4v-10v), 60°C (16v)
Rated Voltage: 4~16V
Capacitance Range: 10~470µF
Leakage Current: 0.02CV
Solder Temperature Peak Reflow Temperature: 260°C
Case Size (mm):
3.2L 1.6W 1.6H (A)
3.5L 2.8W 1.9H (B)
6.0L 3.2W 2.5H (C)
7.3L 4.3W 2.8H (E)(EIA-D)
Download the above information in a pdf flyer: NMC Niobium Capacitors Are Smoke Free.pdf
