RHEF1000-2 Circuit Protection

Resistance - Initial (Ri) (Min):	6.2 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.400" (10.15mm)
Thickness (Max):	--
Height - Seated (Max):	1.043" (26.50mm)
Size / Dimension:	0.689" L x 0.118" W (17.50mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 125°C
Resistance - Post Trip (R1) (Max):	15 mOhms
Series:	PolySwitch®, RHEF
Time to Trip:	9s
Current - Trip (It):	18.5A
Current - Hold (Ih) (Max):	10A
Current - Max:	100A
Voltage - Max:	16V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PTC Resettable Fuses

Resettable fuses, also known as polyfuses, are overcurrent protection elements. By integrating a resistor and a heat element, the current-sensitive PTC properties are achieved. PTC (Positive Temperature Coefficient) resettable fuses are overheat protection elements that protect electronic products from fault current overloading. They are non-cycling overvoltage protection devices, which automatically reset after the overcurrent fault is removed, and are widely used in computer and communication equipment, consumer products, industrial control and other fields. This article will focus on RHEF1000-2 PTC resettable fuse application field and working principle.RHEF1000-2 series PTC resettable fuses are designed and developed for the field of computer and consumer peripheral power protection. The rated current of RHEF1000-2 PTC resettable fuse is 0.45A-2A, rated voltage is 250V AC, preset temperature is 135℃, reset holding current is 10% rated current, and the maximum withstand voltage is 127V AC. RHEF1000-2 PTC resettable fuses can effectively protect a variety of computer systems, home appliances and controllers under certain normal operating voltage and rated current. It can quickly detect the temperature rise caused by the current exceed the specified value and cut off the electrical circuit, thus protecting the system and circuit against high current damage.The working principle of RHEF1000-2 PTC resettable fuse is based on the temperature sensing characteristics of PTC. Generally speaking, the positive temperature coefficient PTC material inside the fuse element has a low resistance temperature coefficient. When the current passes through, the resistance increases as the temperature increases, resulting in overheating protection. When the current in the load exceeds the rated current of the fuse, the internal temperature of the fuse will rise and the resistance of the PTC material will increase. When the temperature of the PTC material reaches its preset temperature, the resistance of the PTC will increase sharply, thus cutting off the load circuit, until the overload current disappears and the temperature of the PTC material decreases. The resistance of the PTC material becomes gradually smaller, and finally comes back to the initial state, which can be used repeatedly.RHEF1000-2 PTC resettable fuses bring the overcurrent protection effect to the power supply system,which can avoid accidents caused by overcurrent damage and can also save a lot of maintenance cost in the application process. At the same time, RHEF1000-2 PTC resettable fuses have low resistance and fast response characteristics. This PTC resettable fuse has the characteristics of small size, light weight and low profile, which is very suitable for the circuit with small space.In the application of the RHEF1000-2 PTC resettable fuse, it can be used help to reduce current overload problems and improve product reliability. It is an ideal circuit protection solution. It is mainly used for lightning protection of computer peripheral devices, personal digital products,1ch power supply of telephone and broadband device, power protection of camera and other equipment. At the same time, PTC resettable fuses are also used in communication device and TV system, air conditioning system, intelligent management system, street lamp energy saving system, solar energy system and other fields.In short, RHEF1000-2 PTC resettable fuse is a kind of effective and reliable overcurrent protection element with excellent temperature stability and fast response speed. This PTC resettable is very suitable for the application field of computer and consumer peripheral power protection. Its fast response time, small size and light weight make it an ideal choice for users. In addition, its temperature compensation characteristics and repeatability make it an ideal overcurrent protection element in many fields.

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