CT427-HSN850DR

Current Sensors Overview

The CT427-HSN850DR is a unidirectional magnetoresistive current sensor from Allegro MicroSystems, designed for AC and DC measurement applications. It features an 8-SOIC surface-mount package with a width of 3.90mm. The device supports a supply voltage range of 3V to 3.6V and draws a maximum supply current of 9mA. Key electrical parameters include a detection current of 50A, a sensitivity of 40mV/A, and a frequency response from DC to 1MHz. Accuracy is specified at ±1%, with linearity of ±0.2% and a response time of 300ns. Operating temperature ranges from -40°C to 125°C.

Current Sensors Feature Summary

• Utilizes XtremeSense™ Crocus TMR technology for high-performance magnetic sensing
• Provides a proportional voltage output ratio for direct interface with microcontrollers
• Offers high accuracy and linearity suitable for precise current monitoring

Current Sensors Applications

• Motor control systems
• Power supply current monitoring
• Industrial automation equipment

Current Sensors Procurement Notes

Verify the specific suffix HSN850DR against official datasheets to confirm the 50A rating and 3V-3.6V supply requirement. Ensure compatibility with the 8-SOIC footprint dimensions (0.154 inch width) during PCB layout. Confirm that the unidirectional nature aligns with the application's current flow direction requirements before finalizing procurement.

Current Sensors Selection Notes

Select this component when a low-voltage 3V-3.6V supply is available and bidirectional sensing is not required. Compare with the CT428 series if a 5V supply system is used, as the CT428 offers similar performance but with different voltage tolerance. Consider the CT417 series only if lower sensitivity is acceptable, noting its distinct 40mV/A sensitivity versus other variants.

Current Sensors Part Context

This part belongs to the XtremeSense™ Crocus family of TMR sensors. It shares the same physical package and basic functionality as the CT417 and CT428 series but differs in supply voltage specifications and sensitivity settings. The CT427 is specifically optimized for lower voltage operation compared to the standard 5V variants in the same product line.

Current Sensors Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the CT426-HSN850DR and CT427-HSN850DR itself. Cross-reference with the CT417-HSN850DR only if supply voltage constraints are relaxed or adjusted, as it operates on a different voltage range.