RXEF025-1

Resistance - Initial (Ri) (Min):	1.25 Ohms
Approvals:	CQC, CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.500" (12.70mm)
Size / Dimension:	0.291" Dia x 0.120" W (7.40mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	3 Ohms
Series:	PolySwitch®, RXEF
Time to Trip:	2.5s
Current - Trip (It):	500mA
Current - Hold (Ih) (Max):	250mA
Current - Max:	40A
Voltage - Max:	72V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

PTC Resettable Fuses are an important type of resettable fuses used to protect a wide range of electronic devices. Specifically, RXEF025-1 is one of the most widely used types of PTC Resettable Fuses due to its excellent performance. It is a polymeric Positive Temperature Coefficient (PTC) Resettable Fuse with an operating temperature range of -55 to +125°C. This fuse has a rated current of 0.25A and a rated voltage of 125V. It is generally used in applications such as personal computers, consumer electronics, and home appliances.

Application Field

RXEF025-1 is typically used in applications where overload protection and overvoltage protection are necessary. It provides reliable and efficient protection for electronic circuits and systems. For example, RXEF025-1 can be used in the primary circuit of a personal computer or laptop to provide surge protection. In addition, it provides overvoltage protection to MOSFETs, IGBTs, and other power transistors. It can also be used in home appliances, such as microwave ovens and televisions, to provide short circuit protection.

Working Principle

The RXEF025-1 PTC Resettable Fuse works by detecting excessive current flow or overvoltage within an electronic circuit or system. When it detects excessive current flow or overvoltage, its polymeric Positive Temperature Coefficient (PTC) element will heat up and open the circuit. This will effectively protect the circuit or system from further damage due to the overcurrent or overvoltage. After the overcurrent or overvoltage situation has been resolved, the RXEF025-1 will reset itself and re-establish the circuit.

Conclusion

The RXEF025-1 is a polymeric Positive Temperature Coefficient (PTC) Resettable Fuse with a rated current of 0.25A and a rated voltage of 125V. It is generally used in applications such as personal computers, consumer electronics, and home appliances to provide overload and overvoltage protection. The RXEF025-1 works by detecting excessive current flow or overvoltage within an electronic system and opening the circuit to protect the system from further damage. It then resets itself after the problem has been resolved. All in all, the RXEF025-1 is an excellent choice of PTC Resettable Fuse for a wide range of electronic applications.

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