PFLR.190 Circuit Protection

Resistance - Initial (Ri) (Min):	39 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	--
Thickness (Max):	0.039" (1.00mm)
Height - Seated (Max):	--
Size / Dimension:	0.827" L x 0.199" W (21.00mm x 5.05mm)
Package / Case:	Strap
Mounting Type:	User Defined
Ratings:	--
Operating Temperature:	-45°C ~ 85°C
Resistance - Post Trip (R1) (Max):	102 mOhms
Series:	PFLR
Time to Trip:	5s
Current - Trip (It):	3.9A
Current - Hold (Ih) (Max):	1.9A
Current - Max:	100A
Voltage - Max:	15V
Type:	Polymeric
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable FusesPTC Resettable Fuses (PTCR) are an effective form of circuit protection which can save costly equipment failure by cutting off power to malfunctioning electrical components. The PTCR fuse is composed of two thermally-sensitive elements; a positive temperature coefficient resistor and a bimetallic strip. When the current flowing through the PTCR fuse rises, it causes a rapid rise in temperature, which causes the bimetallic strip to bend and break the circuit. This eliminates the power source, thus protecting your equipment from damage.The PFLR.190 is a standard-sized PTC resettable fuse that can handle up to 150VDC and 3.85A of continuous current, or up to 6.30A of intermittent current. It has a mechanical life of 100,000 operations, and has a power dissipation rating of 0.60 watts.The PFLR.190 is most commonly used to protect semiconductor devices such as sensors, transistors, and other components that are susceptible to damage from over-current or over-voltage. It can also be used in electric motor and electronic circuits, as well as other high-power applications.In addition to the standard PFLR.190, there are several other types of PTCR fuses available, including the high-temperature PFLR.200 and the PFLR.201 which is designed to handle higher surge currents.The working principle behind the PTCR fuse is quite simple; when the current passing through the fuse exceeds a certain limit, the internal temperature of the fuse increases, causing the bimetallic strip to bend and break the circuit. This interrupts the flow of electricity and eliminates the power source, thus protecting the connected components. The fuse can be reset by simply cooling the fuse down and then reconnecting it.Overall, PTC resettable fuses are an effective and reliable way to protect vulnerable components from damage due to over-current or over-voltage conditions. The PFLR.190 is a standard-sized PTCR fuse that can handle up to 150VDC and 6.30A of intermittent current. It has a power dissipation rating of 0.60 watts and a mechanical life of 100,000 operations.

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