Product Summary

The Bourns SSA-2 series is an analog current sensor with a built-in shunt resistor that is less susceptible to external magnetic fields than the Hall effect type and provides excellent current measurement stability.The analog type features are designed to achieve high performance, aiming for a detection accuracy of ±0.1% and linearity of ±0.1% across the entire current range, enabling stable current detection that is less susceptible to temperature drift.

Furthermore, the sensor's internal shunt resistor eliminates the need for shunt wiring on the board, simplifying layout design. This current sensing solution is suitable for a wide range of applications, including battery systems, renewable energy facilities, and motor drives, which require high accuracy and stability.

Product features

Output voltage vs. temperature characteristics

The graph below shows the temperature characteristics of the SSA-2 series, showing how its output fluctuates with temperature. The small output fluctuations, even with temperature changes, demonstrate that the series is less susceptible to temperature drift and enables stable current detection even in industrial environments.

Built-in shunt resistor for easy layout

The diagram on the left shows the structure of the SSA-2 series, which incorporates the shunt resistor inside the IC. This eliminates the need to mount the shunt resistor on the board and run thick current lines as in the past, significantly reducing the layout load of high-current paths.

This structure enables shortening of wiring distance and reduction of noise sources, making it easier to design current detection circuits, which is one of the features of the SSA-2 series.

Product lineup

The SSA-2 series offers a lineup of four current detection ranges that can be selected according to the application.

External view and dimensions

The SSA-2 series uses a modular structure with an integrated shunt resistor inside, and is characterized by a form that makes it easy to incorporate into circuit boards and housings. The external drawings and dimensions of the SSA-2-100A to 500A and SSA-2-1000A are shown below.

External view

The diagram below shows the external appearance of the SSA-2 series, indicating the mounting hole positions and terminal shapes for each model. Since the shapes of the SSA-2-100A to 500A and the SSA-2-1000A are slightly different, you can use this diagram to check the shape before mounting.

External dimensions

The diagram below shows the external dimensions of each model in the SSA-2 series. You can check the dimensional information required for implementation considerations such as board design, housing design, clearance, and heat dissipation design.

Target application

• Battery System
• Renewable Energy Systems
• motor drive
• EV charger
• Products that use the CANBus interface
• Products that use an RS-485 interface

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