SL32 2R023-B

Series:	BigAMP
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
R @ 25°C:	2 Ohms
Tolerance:	±20%
Current - Steady State Max:	23A
R @ Current:	20 mOhms
Diameter:	1.220" (31mm)
Lead Spacing:	0.307" (7.80mm)
Approvals:	CSA

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Introduction

Inrush current limiters (ICL) are an essential component in the electrical industry. They are most commonly used to limit the inrush current during the start-up of power supplies or tools, thus resulting in limitation of the surge current. When a new power system or equipment is activated or turned on, it pulls a large amount of current to charge the capacitors. This causes an overload which can damage the equipment or overheating in the system. In order to prevent this sort of damage, an inrush current limiting device is required.

Overview of SL32 2R023-B

The SL32 2R023-B is a two-part board mounted dual transistor changeover relay. It features dual MOVs (Metal Oxide Varistors) that limit the inrush current by providing impedance across every voltage value. This limits the load current in the early stages of the surge. In addition, it also provides high inrush suppression and fast pick up.

Application Field

Inrush current limiters are widely used in the electrical industry. Common applications of the SL32 2R023-B include AC-DC power supplies, laser power supplies, countermeasures of decreased safety due to inrush current, and semiconductor laser drivers. The SL32 2R023-B has low power consumption and small size, making it suitable for various applications. In AC-DC power supplies, the SL32 2R023-B can limit the inrush current and protect the power converter. It can also protect semiconductor laser drivers from damage due to inrush current.

Working Principle

The working principle of the SL32 2R023-B is dependent upon its two parts: the changeover relay and the MOVs. The changeover relay provides control signals to the MOVs, which in turn activate or deactivate the current limiting function. When an AC power supply is applied to the inrush current limiters, the changeover relay acts as a switch to ensure that the MOVs are switched off. This cut-off guarantees that the current is limited to a predetermined level, thus preventing damage to the power system or equipment. The MOVs are activated when the system is turned on. This activates the current limiting function, which limits the inrush current to a safe value. The MOVs will act as an impedance and dissipate excess energy into heat, thus providing a safe level of protection to the power system or equipment.

Conclusion

The SL32 2R023-B is a versatile and cost-effective inrush current limiter which can be used in a wide range of applications. Its small size and low power consumption make it suitable for various applications. The SL32 2R023-B provides superior protection to power systems and equipment, by limiting the inrush current during start-up.

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