LR4-730F Allicdata Electronics
Allicdata Part #:

LR4-730F-ND

Manufacturer Part#:

LR4-730F

Price: $ 0.92
Product Category:

Circuit Protection

Manufacturer: Littelfuse Inc.
Short Description: PTC RESET FUSE 20V 7.3A STRAP
More Detail: Polymeric PTC Resettable Fuse 20V 7.3A Ih User Def...
DataSheet: LR4-730F datasheetLR4-730F Datasheet/PDF
Quantity: 3830
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
1 +: $ 0.84420
5 +: $ 0.82026
10 +: $ 0.76734
50 +: $ 0.63504
100 +: $ 0.52920
250 +: $ 0.51597
500 +: $ 0.43659
1000 +: $ 0.38367
5000 +: $ 0.34398
Stock 3830Can Ship Immediately
$ 0.92
Specifications
Series: PolySwitch®, LR4
Packaging: Bulk 
Lead Free Status / RoHS Status: --
Part Status: Active
Moisture Sensitivity Level (MSL): --
Type: Polymeric
Voltage - Max: 20V
Current - Max: 100A
Current - Hold (Ih) (Max): 7.3A
Current - Trip (It): 14.1A
Time to Trip: 5s
Resistance - Initial (Ri) (Min): 6 mOhms
Resistance - Post Trip (R1) (Max): 15 mOhms
Operating Temperature: -40°C ~ 85°C
Ratings: --
Mounting Type: User Defined
Package / Case: Strap
Size / Dimension: 1.106" L x 0.559" W (28.10mm x 14.20mm)
Height - Seated (Max): --
Thickness (Max): 0.039" (1.00mm)
Lead Spacing: --
Approvals: CSA, TUV, UL
Description

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PTC resettable fuses are electrical safety devices used in circuits to prevent them from being damaged due to overcurrent. The LR4-730F is a Type-3 resettable fuse, designed to protect sensitive electronic components from thermal, overcurrent, and overvoltage conditions.

The LR4-730F, or ‘Polyfuse’, comes in a lightweight, 6.5x1.6 millimeter package and offers latching and non-latching features. The design is based on a temperature-sensitive Polymer PTC element, surrounded by a non-conductive jacket, and soldered into a leaded hermetic glass-sealed package. The off-state resistance of the fuse is quite high, typically around 10 ohms, reducing to about 0.20-2 ohms in the on-state.

The Polyfuse fuse works on the principle of resistance. When current passes through the Polyfuse it causes a change in temperature of the polymer, which results in an increase in resistance. This resistance then decreases its current-handling capacity and prevents excessive current from passing through the circuit. When the current is reduced to its normal level, the resistance of the Polyfuse returns to its original state.

In the study of power electronics, the LR4-730F proves to be an invaluable asset. It is perfect for protecting sensitive electronic circuits from over-volatages, over-currents, and temperature fluctuations. It is weather-resistant and reliable in harsh environments. Its compact size, low cost, and low power consumption make this device very desirable for a variety of applications.

The LR4-730F Polyfuse fuse is used in a variety of automated systems and electronic devices such as computers, mobile phones, printers, home appliances, motor controllers and LED lighting systems. In all these applications, the Polyfuse needs to be protected against over-voltage and over-current. It is also commonly used in safety devices such as smoke detectors, burglar alarms, fire alarms, circuit breakers and surge protectors.

The LR4-730F Polyfuse offers an economical solution for the protection of intermediate circuits. Its unique design makes it resistant to shock and vibration, while its self-resetting feature provides protection against repeated short-circuit conditions without requiring a manual reset. The polyfuse allows users to reduce the number of components they need to install to protect their circuits.

In summary, the LR4-730F Polyfuse is a versatile electrical safety device used to protect delicate electronic components from over-currents, over-voltages, and temperature fluctuation. Its simple yet effective design makes it perfect for a variety of applications ranging from computers to smoke detectors. It is known for its low cost, low power consumption, and its ability to reset itself in the event of short-circuit conditions. This makes it the ideal choice for protecting any circuit.

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

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