RUEF300K Allicdata Electronics
Allicdata Part #:

RUEF300KHF-ND

Manufacturer Part#:

RUEF300K

Price: $ 0.35
Product Category:

Circuit Protection

Manufacturer: Littelfuse Inc.
Short Description: PTC RESET FUSE 30V 3A RADIAL
More Detail: Polymeric PTC Resettable Fuse 30V 3A Ih Through Ho...
DataSheet: RUEF300K datasheetRUEF300K Datasheet/PDF
Quantity: 5456
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
1 +: $ 0.31500
5 +: $ 0.30492
10 +: $ 0.29547
50 +: $ 0.24872
100 +: $ 0.20651
250 +: $ 0.18774
500 +: $ 0.15958
1000 +: $ 0.14081
5000 +: $ 0.12672
Stock 5456Can Ship Immediately
$ 0.35
Specifications
Voltage - Max: 30V
Current - Max: 100A
Current - Hold (Ih) (Max): 3A
Current - Trip (It): 6A
Time to Trip: 10.8s
Resistance - Initial (Ri) (Min): 20 mOhms
Resistance - Post Trip (R1) (Max): 80 mOhms
Operating Temperature: -40°C ~ 85°C
Ratings: --
Mounting Type: Through Hole
Package / Case: Radial, Disc
Size / Dimension: 0.449" L x 0.118" W (11.40mm x 3.00mm)
Height - Seated (Max): 0.710" (18.03mm)
Thickness (Max): --
Lead Spacing: 0.199" (5.05mm)
Approvals: CQC, CSA, TUV, UL
Series: PolySwitch®, RUEF
Packaging: Bulk 
Lead Free Status / RoHS Status: --
Part Status: Active
Moisture Sensitivity Level (MSL): --
Type: Polymeric
Description

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PTC Resettable Fuses are self-resetting safety devices used to protect circuits and systems from overcurrent damage. The RUEF300K model of PTC resettable fuse is low-cost and reliable, making it a popular choice for system protection.

Applications

The RUEF300K is typically used in low-voltage, low-power, electronic applications. It is commonly used as an overcurrent protection device for AC-powered consumer electronics, such as computers, power strips, and portable electronics. In addition, it is suitable for automotive, lighting, communication, industrial, and many other applications.

Working Principle

The RUEF300K works by breaking the circuit when the current exceeds the current rating of the device. When the circuit is broken, the internal components are effectively isolated from the thermal energy generated by the overcurrent. This allows the fuse to cool and reset itself when the current is removed.

The RUEF300K has a rated current of 300 mA and a hi-temperature rating of 85°C. When the current increases beyond the rated current, the temperature of the device increases as well. This causes the device to progressively become more conductive as the temperature increases. Eventually, the temperature reaches a point where the device will trip, breaking the circuit.

Once the circuit is broken, the temperature of the device drops, allowing it to cool and slowly start to become less conductive. Once the device has cooled sufficiently, it will reset itself and allow the circuit to be re-energized.

Advantages

PTC Resettable Fuses such as the RUEF300K provide important benefits compared to traditional fuses. The RUEF300K has a fast response time, allowing it to quickly react to excessive current in the circuit. Additionally, it is low-profile and low-cost, making it ideal for space-constrained applications. Most importantly, it is self-resetting, eliminating the need to replace the fuse after each overcurrent event.

Conclusion

The RUEF300K is a low-cost and reliable PTC Resettable Fuse that is widely used for AC-powered consumer electronics and automotive applications. It is easy to install and offers a wide range of protection against overcurrent events. It has a fast response time, is self-resetting, and is low-profile, making it an ideal choice for many applications.

The specific data is subject to PDF, and the above content is for reference

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