0451.500NRL Circuit Protection

Response Time:	Fast
Size / Dimension:	0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CSA, UL
Melting I²t:	0.0795
Breaking Capacity @ Rated Voltage:	50A
Mounting Type:	Surface Mount
Package / Case:	2-SMD, Square End Block
Series:	NANO²® 451
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	500mA
Fuse Type:	Board Mount (Cartridge Style Excluded)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Fuses are an important electricity safety device which works on the principle of interrupting the electrical circuit in the event of abnormally high current. The 0451.500NRL is a 3 pole control fuse used in process control and industrial applications such as motor control panels, overload relays and contactors.The 0451.500NRL is a time-delay fuse with 500 A current rating and a voltage rating of 250 V and 450 V. It works by interrupting the electrical circuit when an abnormally high current, such as from an overload or short circuit, is detected. When an overload occurs, the high current causes the fuse element to heat up and expand. This expansion trips the fuse, thus interrupting the circuit and preventing further damage. The time-delay feature is designed to allow enough time for the fuse to trip, but not too much time for a short-term overload.The design of the 0451.500NRL is composed of three separate elements; the body, the fuse element and the trip function. The body is made of a ceramic insulating material and has three separate terminal connections for each phase, allowing for easier installation. The fuse element is composed of two link-wire assemblies, a pressure plate and a spring. The pressure plate and spring regulate the flow of current through the fuse, while the link-wire assemblies are designed to trip the fuse in the event of an overload or short circuit.The trip function prevents further damage to the circuit by interrupting the circuit when an overload is detected. The trip function works in two stages, the first stage is the latch stage. This latches the fuse and interrupts the current when an abnormally high current is detected. The second stage is the detonation stage. This cuts the fuse element and interrupts the current, thus protecting the circuit.In conclusion, the 0451.500NRL is a 3 pole control fuse used in process control and industrial applications for overload and short circuit protection. Its time delay feature ensures that it does not trip prematurely in the event of a short-term overload. The fuse is composed of three elements, a ceramic body, fuse element and trip function. The fuse element is regulated by the pressure plate and spring, while its trip function is composed of two stages. This ensures that the 0451.500NRL can provide reliable protection and safety in any process control or industrial application.

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