0665.630ZRLL

Package / Case:	Radial, Can, Vertical
DC Cold Resistance:	0.17 Ohms
Size / Dimension:	0.335" Dia x 0.333" H (8.50mm x 8.45mm)
Color:	--
Operating Temperature:	-40°C ~ 85°C
Approvals:	CSA, UL
Melting I²t:	2.24
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Through Hole
Series:	LT-5™ 665
Response Time:	Slow
Voltage Rating - AC:	250V
Current Rating:	630mA
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Fuses: 0665.630ZRLL Application Field and Working Principle

Fuses are a form of electrical safety device commonly used in circuit protection. Fuses protect from over-current or overloads, preventing possible fires from connected equipment. They are commonly used in both residential and commercial locations. The 0665.630ZRLL fuse is typically a time delay fuse. Time delay fuses allow a visible increase in current before the device trips, known as an overload. This allows for small surges in the circuit, and helps it remain connected while protecting the circuit from overloads.

Application

The 0665.630ZRLL fuse is designed for use with low voltage residential and light commercial applications. This includes low voltage applications such as HVAC/R, furnaces, heating and cooling, lighting, telecommunications, appliances, power supplies, motors, and motor controllers. 0665.630ZRLL fuses are ideal for use in panels and panel boards where electrical contacts need to remain safe from short-circuiting, fire, or excessive heat. 0665.630ZRLL fuses should be used in conjuction with the appropriate Voltage Rating, Temperature Rating, and UL Recognition. As with any circuit protection device, be sure to check the UL Recognition Dial rating for more detailed information.

Voltage Rating

The voltage rating of a fuse is the maximum rated voltage that can be safely used with that fuse. It is based on the maximum voltage that can be safely used with connected equipment and should not exceed the equipment rating. Fuses should not be used if the voltage is higher than the fuse rating.

Temperature Rating

The temperature rating of a fuse is the maximum heat generated by the fuse that can be safely withstood without affecting its performance. This is based upon a maximum current rating (in Amps) and time delay (in seconds). Fuses should not be used if the temperature is higher than the fuse rating.

UL Recognition

Fuses that are UL Recognized can be used in applicable applications that meet the requirements of the UL Recognition Standard. These standards ensure that the fuse will provide circuit protection while still limiting potential risk from overloaded or short circuiting circuits. UL Recognition is essential for fuses used in residential and commercial environments, and should be checked before attempting to use any fuse.

Working Principle

The 0665.630ZRLL fuse contains a heating element that works in conjunction with a bimetallic strip. This strip acts as a heat sensing switch and can be calibrated to a set temperature. This temperature is what activates the fuse, and the fuse will trip when the current being drawn through it triggers the bimetallic strip to reach the set temperature.The process starts when current enters the fuse. As current increases, heat also increases as the current passes through the fuse. This heat is transferred to the bimetallic strip in the fuse, and as the strip heats up, it begins to bend. As the temperature reaches the preset level, the bimetallic strip causes the internal connection of the fuse to be broken, ending the flow of current and tripping the fuse. Time delay fuses, like the 0665.630ZRLL model, are designed to accommodate minor surges in current that do not require resetting or a complete shutdown of the system. The bimetallic strip is calibrated in a way that allows it to trip at a predetermined current rating over a set time period, allowing current surges to flow for a brief time before tripping the fuse. In summation, the 0665.630ZRLL fuse is designed for low voltage residential and light commercial applications, and uses a heating element and bimetallic strip to detect surges in current and trip the fuse as needed. Ensure to check the voltage and temperature rating before installing any fuse, and use UL Recognized fuses in applicable areas.

Safety

As with any wiring or electrical connection, proper safety should be used when attempting to install or work with a 0665.630ZRLL fuse. All electrical safety messages should be read and understood, and only trained personnel should be performing any type of installation or repair work. The fuse should be properly rated and UL Recognized to ensure it is able to provide proper circuit protection.

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