CB600 (CBMA Series) Automotive Shunt-Based CAN Current Sensor
Shunt-based bidirectional DC current sensing module with integrated CAN 2.0 A/B communication
Automotive-grade design operating across −40°C to +105°C
Continuous current measurement range ±600A; peak ratings to ±1500A for 25 seconds and ±20000A for 40ms
Measurement accuracy ±0.1% maximum in the 50A–600A region across the full temperature range
Tolerance options from ±0.05% (B) to ±1% (K); current resolution 1mA within the continuous range
Shunt DC impedance 45–55μΩ (nominal 50μΩ) on an 85 × 36mm shunt body; inductance below 5nH
Integrated temperature sensing: −50°C to +150°C range, ±3°C maximum error, 0.1°C resolution
CAN 2.0 A/B communication at 250kbps, 500kbps or 1Mbps; configurable CAN ID and data frame format
Supply voltage 6VDC to 18VDC; power consumption ≤384mW at 12VDC
Galvanic isolation between high-voltage shunt circuit and low-voltage CAN interface: 1000VAC
Qualified to VW 80000 automotive test standard; EMC tested to ISO 7637-2, ISO 10605, CISPR 25 and ISO 11452
Molex 4-pin connector; available with or without 120Ω CAN terminal resistor
What are the CB600 (CBMA Series) Automotive Shunt-Based CAN Current Sensor?
The CB600 is an automotive-grade, shunt-based current sensing module from the CBMA series by C&B Electronics, designed to measure bidirectional DC current at up to ±600A continuously and report measurements digitally over a CAN 2.0 A/B bus. It shares the same integrated platform architecture as the CB350 but is rated for the higher continuous currents found in larger battery packs and high-power charging systems. Built around a precision low-TCR shunt resistor with a nominal DC impedance of 50μΩ on an 85 × 36mm shunt body, the module integrates a high-precision analogue-to-digital converter, onboard temperature compensation across the full operating range, and a galvanically isolated CAN interface into a single compact package that connects directly into the main current path of a battery system.
Current measurement accuracy is ±0.1% maximum across the 50A to 600A high-current region over the full −40°C to +105°C automotive temperature range, with milliampere-level resolution at low currents within the continuous operating band. The module supports transient overload conditions to ±1500A for up to 25 seconds, ±3000A for 5 seconds, and pulse peaks to ±20000A for 40 milliseconds, making it suitable for the high-impulse current events that occur during fast charging and regenerative braking in high-energy battery systems. Tolerance grades from ±0.05% to ±1% allow selection of the appropriate accuracy level for the application. The integrated temperature sensor measures both shunt and PCB temperature across −50°C to +150°C with ±3°C maximum error and 0.1°C resolution, providing data for internal compensation and optional transmission to the host battery management system. Galvanic isolation between the high-voltage shunt circuit and the low-voltage CAN interface is rated at 1000VAC, enabling installation at either the positive or negative electrode of a high-voltage battery bus.
The CAN interface operates at selectable speeds of 250kbps, 500kbps or 1Mbps and supports four configurable data frame formats. Formats A and B each transmit current and temperature in separate frames with cyclic counters, hardware fault flags, and overtemperature indicators for both the shunt and PCB; Format C combines current and temperature in a single frame with CRC-8 error checking; Format D transmits current only. CAN ID is configurable, and both standard and extended frame types as well as Motorola and Intel byte ordering are supported. The module offers two measurement modes: a periodic time-interval mode and a command-triggered mode in which the host BMS requests measurements on demand, with a response delay of less than 5ms. Start-up time from power-on to first valid CAN message is 100–150ms. The CB600 is qualified against a full suite of 50 electrical, climatic, and mechanical tests to VW 80000, ISO 7637-2, ISO 10605, CISPR 25 and ISO 11452, and the copper bus bar connection uses M6 bolts torqued to 4–6Nm with a recommended bar cross-section of 40 × 3mm.
CB600 (CBMA Series) Automotive Shunt-Based CAN Current Sensor Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Series CB600
Product group Current Sensor
Description
Shunt Based Current Sensor
Power Rating ≤384mW @12VDC
Rated Current -600A~+600A
Supply voltage 6VDC~18VDC
Resistance (Ω) 50u
Tolerance (%) 0.1(Max)
Applications of the CB600 (CBMA Series) Automotive Shunt-Based CAN Current Sensor
Where RARA current sensors are deployed in the field.
Electric vehicle battery management systems — real-time bidirectional current measurement at high-voltage battery packs requiring continuous ratings above 350A
High-power EV drivetrains and e-axle systems — main battery current monitoring at the positive or negative electrode of the high-voltage bus during acceleration and regenerative braking
DC fast-charging stations and on-board chargers — accurate charge current measurement and CAN reporting to the vehicle BMS at high charge rates
Commercial vehicle electrification — buses, heavy trucks and off-highway vehicles with large-format battery packs requiring high continuous current sensing
Grid energy storage systems — bidirectional current sensing for charge and discharge management in high-capacity stationary battery installations
Industrial UPS and power conditioning — high-accuracy current monitoring in large battery strings with CAN-based reporting to system controllers
Fuel cell vehicle systems — current sensing at high-power fuel cell stacks or buffer battery interfaces
Hybrid electric vehicle powertrains — main battery current monitoring in high-voltage parallel hybrid architectures
Battery test and formation equipment — precision bidirectional current measurement during cell and pack testing at production scale
Marine and rail traction systems — high-current battery pack monitoring in electrified propulsion systems requiring isolated digital output and automotive-level qualification
Related Products of the CB600 (CBMA Series) Automotive Shunt-Based CAN Current Sensor
Series CB350
Product group Current Sensor
Description
Shunt Based Current Sensor
Power Rating ≤216mW @12VDC
Rated Current -350A~+350A
Supply voltage 6VDC~18VDC
Resistance (Ω) 50u
Tolerance (%) 0.5
Series CB1000
Product group Current Sensor
Description
Shunt Based Current Sensor
Power Rating ≤384mW @12VDC
Rated Current -1000A~+1000A
Supply voltage 6VDC~18VDC
Resistance (Ω) 25u
Tolerance (%) 0.1(Max)
Series NFCT
Product group Current Sensor
Description
Fluxgate type Current Sensor
Power Rating 5V~24V
Resistance (Ω) 10mA~100kA
Tolerance (%) 0.01~1
Why Choose RARA Current Sensors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Two Technologies
Shunt-based sensors for compact, direct EV battery measurement and fluxgate sensors for isolated ultra-high current applications — both from a single IATF 16949 certified supplier..
02
EV-Ready Design
CB-series sensors operate on 6–18VDC — the standard supply range of automotive BMS systems — with bidirectional ±current output and ultra-low 25–50μΩ shunt resistance that minimizes power loss in the high-current battery path.
03
Extreme Range Coverage
From 10mA precision measurement to 100kA industrial monitoring — the NFCT fluxgate sensor covers a dynamic range that no single shunt solution could match, with galvanic isolation for high-voltage safety.
04
Global Track Record
Trusted by Tesla, GM Korea, Proterra, and leading EV manufacturers — RARA current sensors are deployed in EV battery packs, charging infrastructure, and industrial power systems across six continents.
