250R120-R1ZR

Resistance - Initial (Ri) (Min):	6 Ohms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.433" (11.00mm)
Size / Dimension:	0.256" L x 0.181" W (6.50mm x 4.60mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	16 Ohms
Series:	POLY-FUSE®, 250R
Time to Trip:	2.5s
Current - Trip (It):	240mA
Current - Hold (Ih) (Max):	120mA
Current - Max:	3A
Voltage - Max:	60V (250V Int)
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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PTC Resettable Fuses are electrical devices designed to protect electrical systems from overloads and short circuits. They work by using a fuse element, which will open or close when it senses a buildup of current beyond a certain threshold. The fuse element is connected to a resistor, which is then connected to a switch. When the switch is turned off, the resistor prevents current flow, thereby preventing damage to electrical components. The PTC Resettable Fuse also includes a thermal element, which is typically bonded to the fuse element. This thermal element will activate when the current reaches a certain level and will open, allowing the fuse to reset and protect the circuit. The 250R120-R1ZR PTC Resettable Fuse is a Type R PTC-resettable fuse, which is used in a variety of applications. In its general purpose application, this fuse is ideal for use in high current circuits where fast responding protection is needed. It is also used in motor control applications, such as electric motors, and in high-voltage converters. With its compact size and low weight, it is well suited to a variety of applications where space is limited.The working principle of the 250R120-R1ZR PTC Resettable Fuse is simple. The fuse will open when the current reaches a predetermined level and when the temperature rise due to the excess current exceeds the melting point of the fuse. At this point, the fuse will break the circuit and the switches thus preventing any further current from flowing. Once the current is safely diverted, the resistor connected to the fuse helps to reset the fuse and will allow the current to flow again, once the temperature has gone down to a safe level. PTC Resettable Fuses are designed to provide a simple, cost effective protection against the hazards of an electrical overload or short circuit. These fuses are fast acting, reliable and can be easily maintained and replaced when necessary. They provide robust protection against fault condition while still allowing the current to flow. The 250R120-R1ZR PTC Resettable Fuse is a popular choice, owing to its compact size and light weight. It is also capable of withstanding high currents and offers superior protection against faults.

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