VLR170DUAF

Resistance - Initial (Ri) (Min):	18 mOhms
Approvals:	--
Lead Spacing:	--
Thickness (Max):	--
Height - Seated (Max):	--
Size / Dimension:	--
Package / Case:	Strap
Mounting Type:	User Defined
Ratings:	--
Operating Temperature:	--
Resistance - Post Trip (R1) (Max):	64 mOhms
Series:	PolySwitch®, VLR
Time to Trip:	5s
Current - Trip (It):	4.1A
Current - Hold (Ih) (Max):	1.7A
Current - Max:	100A
Voltage - Max:	12V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Discontinued at Digi-Key
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

PTC Resettable Fuses (also known as Polyfuse) are the most reliable form of electrical protection devices available in the market today. They provide overcurrent protection by quickly tripping the system if an overload occurs. VLR170DUAF is a type of PTC Resettable Fuse that is widely used in consumer electronics, automotive, industrial, and portable applications. It is a non-replaceable type of fuse that provides time-delayed protection from overcurrents. This fuse offers reliable performance and excellent safety.

Application Field and Working Principle

The VLR170DUAF is used to protect circuits, components, and systems from overcurrents, voltage surges, and short circuits. They are suitable for use in places that are exposed to unpredictable power peaks. This fuse is designed to disconnect the electrical circuit in an overcurrent situation, and then reset itself after a fixed time. VLR170DUAF fuses provide short circuit protection by a semiconductor bridge composed of three sets of especially designed thyristors. When an overcurrent occurs, the current flows through the thyristors and causes the bridge to trip, resulting in disconnection of the circuit. After the overcurrent is gone, the bridge will be reset and the circuit will be reconnected. VLR170DUAF fuses can handle currents up to 70A and voltages up to 170V, which makes them suitable for a wide range of applications. They can be used in harsh environments as they are resilient to vibrations, and have excellent insulation properties.

Performance Characteristics

The VLR170DUAF has a typical trip time of 1.45 seconds at an overload current of 79A and an operating voltage of 230V. It can operate in temperatures ranging from -40 degrees Celsius to 125 degrees Celsius. The maximum voltage drop at rated current is 0.07V. This fuse has excellent resistance to shock and vibration, so it can be used in harsh industrial environments.

Conclusion

VLR170DUAF is a reliable and durable PTC Resettable Fuse, which has a wide range of applications. This fuse offers time-delayed protection from overcurrents and has a quick response time. It performs well in all climates, temperatures, and vibration environments. The VLR170DUAF fuse is a great choice for any application that requires overcurrent protection.

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