B59870C0120A051

Resistance - 25°C (Typ):	25 Ohms
Approvals:	UR
Lead Spacing:	0.197" (5.00mm)
Thickness (Max):	--
Height - Seated (Max):	0.492" (12.50mm)
Size / Dimension:	0.354" Dia x 0.197" W (9.00mm x 5.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	0°C ~ 60°C
Series:	--
Current - Trip (It):	200mA
Current - Hold (Ih) (Max):	100mA
Current - Max:	1A
Voltage - Max:	265V
Type:	Ceramic
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses

PTC Resettable Fuses, also known as Polymeric Positive Temperature Coefficient Resettable Fuses, are electronic components which enable the protection of electrical circuits against current overloads. These fuses are made using Polymer-based materials, which means that they are unable to blow, unlike traditional glass fuses. The resettable fuse also has a self-resetting thermal circuit breaker enabling the protection of circuits for current overloads.The specific component B59870C0120A051 is typically used to protect circuits which require higher current ratings, such as those used in airbag circuits, fire truck applications and automobile audio/video systems. This component is used as a power distribution device that can handle up to 20A of current. It can be used in both AC and DC circuits, and it has low reactance and positive temperature coefficients which enable it to be very efficient in a wide range of applications.In general, the typical working principle of a PTC Resettable Fuse is that if the current flowing through the fuse exceeds the defined set point, then the PTC Resettable Fuse will heat up, leading to an increase in resistance. This resistance reduces the current flowing through the fuse, thereby protecting the circuit from damage due to overload. When the temperature of the fuse drops, the resistance will diminish, and the current will resume the pre-set value. The design of the B59870C0120A051 makes it especially useful for high current applications where the maximum operating current is over 20A. It also has a quick response time which allows it to protect the circuit in the event of a power surge. Additionally, the component has been designed to operate under extreme temperature conditions, such as hot or cold environments, as PTC Resettable Fuses are able to self-regulate and maintain the pre-set current.The B59870C0120A051 PTC Resettable Fuse is a reliable and easy-to-use component designed to protect electrical circuits from current overloads. The fact that the component can be used in both AC and DC circuits makes it a versatile solution for a range of applications. Additionally, the component’s quick response time and ability to operate under extreme temperature conditions mean it is a safe and effective solution for the protection of power systems.

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