ST2-L2-DC5V

Turn On Voltage (Max):	4 VDC
Coil Resistance:	110 Ohms
Coil Power:	240 mW
Contact Material:	Silver Alloy
Operating Temperature:	-40°C ~ 60°C
Termination Style:	PC Pin
Mounting Type:	Through Hole
Features:	Sealed - Fully
Release Time:	10ms
Operate Time:	10ms
Turn Off Voltage (Min):	--
Series:	ST
Switching Voltage:	380VAC, 250VDC - Max
Contact Rating (Current):	8A
Contact Form:	DPST-NO (2 Form A)
Coil Voltage:	5VDC
Coil Current:	45.0mA
Coil Type:	Latching, Dual Coil
Relay Type:	General Purpose
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The term ST2–L2–DC5V identifies a family of power relays, where ST stands for ‘Single Pole, Double Throw’, L2 stands for dual coil, and DC5V is the working voltage. These relays are designed for use in applications requiring higher currents, typically operating currents between 2 and 6 amps.

Application Fields

For many off-the-shelf power relays, the current rating is typically 2 amps or lower. ST2–L2–DC5V power relays offer an attractive solution for applications requiring higher currents. Common applications for ST2–L2–DC5V power relays include automotive, HVAC, electronic circuits, household appliances, lighting, telecommunication, security equipment, and industrial automation.

Working Principle

The ST2–L2–DC5V power relay utilizes electromagnetic principles to control electrical loads. It has two open coil or winding pairs that are designed to energize and de-energize based on electric current or voltage control. The two coils of the relay are individually controlled and can be used to switch between two different terminals with positive and negative signals. The current flow between the two coils determines the behavior of the relay: when one of the coils is energized, the contacts transition from one state to the other; when both coils are energized, the contacts remain at the previous state.In terms of design characteristics, the ST2–L2–DC5V relays have a dual-coil design, a flexible mounting system, and an operating before release (OBR) function. This design helps ensure that each connection is secure and reliable even when exposed to high vibration and temperature changes.

Relay Mounting and Wiring

ST2–L2–DC5V power relays are designed for surface mounting and are usually supplied with pre-assembled wiring. The relay is secured to the mounting surface with screws and nuts. Then, wires are attached to the relay coil and the connecting terminals. The relay can then be connected to a switch, timer, or other control device to switch the contacts.

Relay Limitations

While ST2–L2–DC5V power relays offer many advantages, there are some limitations to consider when selecting them for a specific application. The main limitation is the maximum operating current of 2 to 6 amps, which limits the size and complexity of the loads that can be switched. The operating frequency of the relay should also be checked to ensure that it is suitable for the expected application.In addition, as with any electronic component, ST2–L2–DC5V relays can be damaged if exposed to too much electrical noise, so care should be taken to ensure that the wiring is properly shielded and appropriate noise suppression measures are in place.

Conclusion

ST2–L2–DC5V power relays are a robust and reliable family of relays designed to provide reliable operation in applications requiring higher operating current of up to 6 amps. They are widely used in automotive, HVAC, electronic circuits, household appliances, lighting, telecommunication, security equipment, and industrial automation applications. As with any electronic component, care must be taken to ensure that the relays are installed correctly and adequate noise suppression measures are in place.

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