Molex Percept is a family of bidirectional, high-current sensors designed to measure current in automotive and industrial busbar systems. Molex lists family current-range options from ±450 A to ±1,600 A, ±2% accuracy over temperature and product lifetime, and operation from −40 to +125 °C. The design pairs Infineon coreless differential Hall sensing with Molex packaging that can integrate the sensor into a busbar.
What the Percept sensor is designed to do
Percept is intended for high-current power systems—not general-purpose consumer electronics. Molex identifies automotive systems, industrial inverters, motor drives, power distribution and charging systems as applications. Its differential Hall-effect approach measures the magnetic field associated with current flowing through a conductor without placing a conventional resistive shunt in the current path.
The sensing element uses Infineon coreless differential Hall technology; Molex supplies proprietary electronics packaging. Molex and Infineon describe the combination as a compact, robust approach for automotive and industrial environments. In particular, differential sensing is intended to help reject interference from stray magnetic fields, which can be a concern around EV power electronics and motor drives. That design intent is not a substitute for validating noise immunity in the target system.
Published specifications
Molex’s published family specifications include the following. The current range describes available range options across the family, not necessarily one device that can be configured to every value in that span.
#1 Best Overall
- 【Compatible with Honda Models】Compatible with 2012-2015 Honda Civic and 2012-2016 Honda CR-V.
- 【Compatible with Acura Models】Compatible with 2013-2022 Acura ILX, 2013-2014 Acura ILX Hybrid, and 2013-2018 Acura RDX.
- 【OEM Replacement】Directly replaces OE# 38920-TR0-A02, 38920TR0A02, 38920-TR0-A01, and 38920TR0A01. Built to OEM specifications for an exact fit, reliable performance, and seamless installation.
- 【Installation Tips】Disconnect the negative battery cable before installation to help protect the vehicle's electrical system. Install the sensor in the original position, secure all connections, and inspect the wiring harness for damage before restoring battery power.
- 【Restore Accurate Battery Monitoring】Measures battery current in real time and transmits precise data to the vehicle's battery management system (BMS), helping optimize charging performance, extend battery life, and support stable vehicle electrical operation.
| Specification | Published value |
|---|---|
| Current range | ±450.0 A to ±1,600.0 A across the family |
| Measurement direction | Bidirectional |
| Supply voltage | 4.5–5.5 V |
| Output | Full-differential or single-ended |
| Operating temperature | −40 to +125 °C; Molex lists AEC-Q100 Grade 1 |
| Accuracy | ±2% over the temperature range and product lifetime, according to Molex |
The accuracy figure is a vendor-published claim, not a complete error budget for a finished vehicle or industrial system. A design review should confirm the exact part’s range, output interface and accuracy conditions against the application’s measurement and safety requirements.
How the busbar integration works
The family includes a vertically inserted sensor-in-busbar package and an optional sensor-only package. The integrated approach brings the conductor and sensing electronics together; Molex describes the broader assembly as incorporating the busbar, connectors, PCB, heat-sink and mechanical elements for demanding high-current and high-temperature environments.
Rank #2
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
- GM-recommended replacement part for your GM vehicle's original factory component
Molex says the busbar can be calibrated at the factory at end of line. That can reduce calibration work during final system integration and improve repeatability, but it also makes the specific busbar and assembly configuration part of the implementation decision. A sensor-only package offers another configuration path, though the published information here does not specify a universal mechanical design or calibration procedure for every customer installation.
Size, mass and packaging claims
Molex’s 2024 product announcement says Percept is up to 50% smaller and 86% lighter than competing current sensors. These are company comparisons; the announcement does not establish a single reference sensor or measurement basis applicable to every competing product. Treat them as an indication of Molex’s intended packaging advantage, then compare dimensions and mass for the actual part and installation.
Rank #3
- [Fitment] For Honda for Accord 2013-2017.
- [Part Number] 38920-T2A-A02,38920-T2A-A03,38920-T2A-A04.
- [Function] The battery current sensor is used to measure the voltage, current value and temperature of the battery fluid to control the engine to generate the required stable voltage. Replace old battery sensors and fix charging system issues!
- [Easy to install] 1. Disconnect the negative cable and loosen the bolt with a tool. 2. Then use tools to remove the bolts on the other side of the wiring 3. Finally remove the old battery sensor and replace it with a new one, reconnect the cables and bolts.
- [Material] Made of plastic and metal material,sturdy and durable and provides stability and reliability.
Molex also says its proprietary packaging process uses 99% less water than typical PCB manufacturing. This is a manufacturing-process claim, not a measure of the sensor’s operating performance or total product lifecycle impact.
Could it fit an inverter or motor drive?
Those are among the applications Molex names. Before selecting a Percept variant, engineers should check that the chosen range covers expected normal current and transients, that the 4.5–5.5 V supply and output type match the control electronics, and that busbar geometry and mounting suit the available space and thermal environment.
Rank #4
- ✔OE# 38920-T2A-A04. Replace OE# 38920T2AA04, 38920-T2A-A02, 38920-T2A-A03, 38920-TY2-A01. Compatible with: For Acura RLX 2014-2020, for Honda Accord 2013-2017. Please check the second main picture to confirm car battery sensor whether compatible with your car.
- ✔Function: The battery sensor manufactured from high-quality materials, the pigtail connector are designed using copper alloy conductors to ensure high performance. It can be connected tightly with the original cables, ensure the stability of installation and sensing, solve your charging system problem and back to the road.
- ✔Package included: Battery Current Sensor x1, with Pigtail Connector. The sensor measures the current to and from the battery, also monitor the voltage, state of charge and state of health of the battery (aging). Easy to install, it fits perfectly and has accurate structure, without instruction manual.
- ✔Repalce Battery Current Sensor: 1. Disconnect the negative cable and loosen the bolt with a bolt wrench. 2. Remove the bolt on the other side of the wiring with a bolt wrench 3. Remove the old battery sensor, replace it with a new one, and reconnect the cables and bolts.
- ✔After-Sales Service: We offer 24 hours customer service and 1 year product service, If you are encounter product installation, product quality and other problems, please feel free to contact us.
- Current and direction: Confirm the particular range option and the required positive and negative current limits.
- Signal interface: Select full-differential or single-ended output based on the receiving circuit and its noise environment.
- Mechanical integration: Review the integrated busbar package versus sensor-only configuration, including conductor layout, connectors and thermal management.
- Qualification: Confirm the applicable part-level qualification and the project’s separate system-validation requirements. A published AEC-Q100 Grade 1 designation and temperature range should not be read as proof that a vehicle maker has approved a particular design.
- Calibration: Establish whether the factory-calibrated busbar configuration matches the final production assembly and its traceability needs.
Availability and procurement
Molex announced the family on July 30, 2024. At that time, it said industrial options were slated for October 2024 and automotive product approval was planned for the first half of 2025. Those were historical plans, not confirmation of present availability or completed automotive approval.
For a current quote or design-in, contact Molex directly or an authorized electronics distributor. Verify the exact part number, stock and lead time in your region, current qualification status, and product lifecycle before committing a design. No verified Amazon listing or authorized-channel inventory status is established here.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Quick Recap
Best Value
- 【Compatible With】: This Automotive Battery Current Sensor is compatible with Nissan Altima 2014-2025, for Infiniti QX50 2019-2020
- 【Perfect Fit & Enhanced Protection】: This product is designed to replace part numbers 294G0-1JA0A, 294G01JA0A, ensuring precise fitment and smooth operation with your vehicle's electrical system. Constructed with durable materials to deliver reliable performance through extended use
- 【Material】: ABS material, very durable for your car. Replace the old sensor if it is broken or cracked. With good impact resistance and durability, it is not easy to break or crack during use
- 【Warranty & Service】: We provide a one - year product return service. If you have any questions either during the purchase or while using our product, please feel free to contact us first, we believe no problem is irresolvable through honest communication!
- 【Package Include】: The package contains 1Pcs Automotive Battery Current Sensor
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
