0251.200PARL

Response Time:	Fast
DC Cold Resistance:	0.895 Ohms
Size / Dimension:	0.110" Dia x 0.280" L (2.80mm x 7.11mm)
Color:	--
Operating Temperature:	-55°C ~ 125°C
Approvals:	CSA, UR
Breaking Capacity @ Rated Voltage:	50A AC, 300A DC
Mounting Type:	Through Hole
Package / Case:	Axial
Series:	PICO® II 251
Voltage Rating - DC:	125V
Voltage Rating - AC:	125V
Current Rating:	200mA
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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Introduction

PARL, or Piezoelectric Arc Protection Relay, is a unique type of over-current protection fuse used mainly in electrical installations such as motors and lines. It is used to protect equipment from potential arc-fault and over-current conditions, and improve safety. PARL fuses have been developed to take advantage of the features of an arc-protective fuse and allow effective protection of electrical equipment without the use of complicated over-current protection relays.

Application Field

PARL fuses can be used in many electrical installations and are commonly found in transformer yards, substations, motor control centers, large motors and bus wiring systems. Furthermore, PARL fuses are used in air-conditioning systems, high-voltage lighting systems, solar and wind energy systems, and other industrial machinery. This type of fuse can be used as both an emergency shut-off and an overload protection device.

Working Principle

The working principle of the PARL fuse is based on the ability of its internal thread to detect an increased current level in the electrical installation. Once the internal thread detects an increase in current, the fuse’s current-limiting element opens and breaks the circuit, thereby preventing any further current surge and the danger of an electrical arc-fault. This fast-acting current-limiting element prevents any further current flow and electrical damage, while the fuse\'s internal thread restores the electrical circuit to a normal level when the fault has been cleared.In addition, the fuse can be set to provide multiple levels of current-limiting protection, ranging from easily visible red warning lights to automatic shut-off of the entire system. The fuse is also designed to allow for a “reset” without having to replace the component itself, which helps to reduce maintenance and downtime costs.

Advantages

PARL fuses provide a great many benefits over other types of over-current protection and arc-fault protection systems, such as the convenience of a self-contained unit and the protection of multiple motor, lighting and electrical installations simultaneously. Due to the current-limiting nature of the fuse, the system can be reset without having to replace any parts, which can save significant replacement costs. The low-profile design of the fuse often means that it can be easily hidden from view, and the internal thread ensures that no wiring is exposed to any current surges. The small size of the PARL fuse allows it to be installed within confined spaces, helping to improve installation efficiency. In addition, PARL fuses are designed to be highly reliable and work accurately in a wide range of conditions, making them ideal for a variety of applications.

Conclusion

PARL fuses are a reliable and efficient way to protect electrical installations from over-current and arc-fault conditions. With their self-contained design and the ability to be reset without replacement, PARL fuses are a cost-effective choice for a variety of applications. They are also suitable for use in a wide range of environments, due to their small size and their internal thread, which provides a secure connection.

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