RHEF050US-2

Resistance - Initial (Ri) (Min):	480 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.201" (5.10mm)
Size / Dimension:	0.201" Dia x 0.118" W (5.10mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 125°C
Resistance - Post Trip (R1) (Max):	1.1 Ohms
Series:	PolySwitch®, RHEF
Time to Trip:	2.5s
Current - Trip (It):	920mA
Current - Hold (Ih) (Max):	500mA
Current - Max:	40A
Voltage - Max:	30V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

PTC Resettable Fuses, also known as polymeric positive temperature coefficient fuses, are self-resetting current protection devices. They are designed to serve as more reliable and cost-effective solutions for many electronic products as a substitute to multi-stage thermal cutoff fuses. As such, a wide range of applications now benefit from the use of resettable fuses, including consumer electronics, security products, medical equipment and the automotive industry. The RHEF050US-2 is a UL recognized / CE certified PTC Resettable Fuses, which is widely used in the market due to its superb thermal performance and excellent protection from over-current. In this article, we will discuss the application fields and working principle of RHEF050US-2.

Application Field

RHEF050US-2 is mainly used to provide over-current protection for electronic devices and circuits. Its excellent performance makes it suitable for a variety of applications. Here are some of the most common applications of RHEF050US-2: 1. Home Appliances: RHEF050US-2 is frequently used in home appliances like washers, dryers, air conditioners, refrigerators, dishwashers and other household electronic devices. It is used to protect against potential over-current conditions that could damage the appliance.2. Security Products: In the security industry, RHEF050US-2 is widely used in security cameras, alarm systems and other security-related products. The resettable fuse helps to protect the device from hazardous over-current and short-circuit conditions.3. Medical Equipment: RHEF050US-2 is often implemented in medical equipment like X-ray machines, dental drills and defibrillators. As it can effectively protect against over-current, it is an essential component for medical equipment to ensure the safe operation and accuracy of the device.4. Automotive Industry: The automotive industry is also widely using RHEF050US-2 in its products. It is frequently used in automotive fuses, switches, ignitions, power trains, electric doors and other components that require reliable protection from electrical overloads.

Working Principle

RHEF050US-2 works on a positive temperature coefficient (PTC) principle. When current flows through the device, the temperature of the fuse rises. When the temperature reaches a predefined trip point, the fuse element will reach its maximum value and the circuit will be broken. At this point, the fuse will reset itself when the temperature drops below its reset temperature. This ensures reliable protection and allows the device to reset itself without the need for a manual reset.

Conclusion

RHEF050US-2 is a widely used PTC Resettable Fuse that offers superior thermal performance and over-current protection. Its uses span across a number of industries, including home appliances, security products, medical equipment and the automotive industry. RHEF050US-2 operates on a positive temperature coefficient principle, which allows it to automatically reset itself when the device is no longer at risk of over-current or short-circuiting.

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