GLLA03A4J

Ingress Protection:	IP66 - Dust Tight, Water Resistant
Mechanical Life:	5,000,000 Cycles
Electrical Life:	--
Operating Position:	15°
Operating Temperature:	-10°C ~ 80°C
Overtravel:	60°
Differential Travel:	25°
Pretravel:	15°
Release Force:	2.039gfm
Operating Force:	5.092gfm
Features:	--
Series:	GLL
Termination Style:	Screw Terminal
Mounting Type:	Chassis Mount
Actuator Type:	Side Rotary, Adjustable Rod
Voltage Rating - DC:	250V
Voltage Rating - AC:	300V
Current Rating:	10A (AC/DC)
Switch Function:	On-Mom
Circuit:	SPDT (BBM)
Part Status:	Active
Packaging:	Bulk

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Snap-Action, Limit Switches: GLLA03A4J Application Field and Working PrincipleSnap-action, limit switches are vital sensors in automated system designs, where they can be used to activate an electrical mechanism or component based on the presence of a physical object at a specified location. A key example of a snap-action, limit switch is the Littelfuse GLLA03A4J, which is a particularly suitable limit switch for use in enclosures where the ambient temperature may rise above 70 degrees Celsius. This article will explore the application field and working principle of the GLLA03A4J.When applied and used correctly, the GLLA03A4J can provide versatile and accurate switching solutions. Because it is a HVAC limit switch, the GLLA03A4J is designed to operate at a maximum ambient temperature of 70 degrees Celsius, allowing it to be used safely in enclosures where higher temperatures may occur. Additionally, the GLLA03A4J is designed to provide superior shock and vibration resistance and can be supplied with either an open or closed-loop switching mechanism.The GLLA03A4J has a wide range of possible applications, ranging from typical HVAC control systems, to safety interlocks and machinery automation. In HVAC systems, the GLLA03A4J is typically used to detect overheating conditions in ducts and furnaces. In safety interlocking systems, the GLLA03A4J is used to ensure safe, accurate switching between various machine states and can be used to activate safety systems such as emergency shut-off valves. Finally, in machinery automation the GLLA03A4J is used to detect the presence of various objects in the system and can trigger PLC outputs to activate machinery components accordingly.In terms of working principle, the GLLA03A4J is a snap-action, limit switch, which means that it operates using the principle of mechanical and electrical contact points. The switch is designed with a stationary contact and a movable contact, where the movable contact is connected to an actuator. Once the switch is tripped, the actuator is activated and causes the movable contact to move and make contact with the stationary contact, thus completing the electrical circuit and triggering the switch. This is known as snap-action because the switch is designed to operate with a snap-like movement.The GLLA03A4J is also designed to provide superior shock and vibration resistance and can be supplied with either an open or closed-loop switching mechanism. The open-loop switch requires manual resetting, whereas the closed-loop switch will automatically reset after a given time, making it ideal for applications where long operating cycles are required.The GLLA03A4J offers excellent performance, particularly in applications where high temperatures or shock and vibration may occur. Additionally, the switch can be configured with either an open-loop or closed-loop switching mechanism, making it suitable for a wide range of applications. It is therefore safe to say that the GLLA03A4J offers a versatile and reliable switching solution, with superior performance up to a maximum ambient temperature of 70 degrees Celsius.

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