CAB-SF 500-C/SP1-000

Current Sensors Overview

The CAB-SF 500-C/SP1-000 is a board-mount current transducer from the LEM CAB family, designed for battery monitoring applications requiring high accuracy and very low offset. It utilizes fluxgate technology to provide galvanic separation between the primary high-voltage circuit and the secondary 12 V system. The device features a digital output via high-speed CAN (500 kbps) and operates on a unipolar +12 V supply. Key electrical parameters include a rated current of 500 A, an accuracy of 0.5%, and a frequency range up to 100 kHz. It supports bidirectional measurement with unlimited over-current capability and functions within a temperature range of -40°C to +85°C.

Current Sensors Feature Summary

• Utilizes fluxgate technology for high accuracy and very low offset in battery monitoring
• Provides full galvanic insulation between primary high-voltage and secondary 12 V circuits
• Features a digital high-speed CAN output interface for direct integration
• Offers unlimited over-current capability and plug-and-play compatibility with standard CAB family

Current Sensors Applications

• Hybrid and electric vehicle battery pack monitoring
• Conventional lead-acid battery management systems
• Accurate current measurement for State of Charge (SoC), State of Health (SOH), and State of Function (SOF)

Current Sensors Procurement Notes

Verify the specific suffix SP1-000 against the official LEM datasheet to confirm mating connector type (Tyco AMP 1473672-1) and pinout configuration. Ensure the application environment remains within the specified operating temperature range of -40°C to +85°C. Confirm that the 12 V power supply meets the required voltage limits for stable fluxgate operation. Cross-reference the part number with the manufacturer's latest documentation to ensure no design changes affect functionality or safety certifications.

Current Sensors Selection Notes

Select this component when functional safety and precise current measurement are critical for battery management systems. The fluxgate technology ensures minimal offset drift compared to traditional open-loop sensors. It is suitable for applications requiring galvanic isolation and digital communication via CAN bus. Consider the physical dimensions and chassis mount style for PCB layout. This model is ideal for automotive environments where reliability under varying thermal conditions is essential.

Current Sensors Part Context

The CAB-SF series represents LEM's advanced fluxgate-based current transducers tailored for automotive battery applications. Unlike standard CAB models, the SF variant integrates digital output capabilities while maintaining the robust mechanical design of the family. It addresses the need for high precision in modern hybrid and electric vehicles, offering superior performance in terms of offset cancellation and total error across the operational temperature range.

Current Sensors Replacement Considerations

Standard CAB 500-C/SP5 models offer similar current ratings but lack the digital CAN output and fluxgate-specific low offset characteristics. Verify if the analog output of the standard CAB series is sufficient for the control unit. Ensure any substitute maintains the required galvanic isolation and mounting form factor. Check compatibility with the existing CAN network infrastructure before replacing with a non-digital variant.