Next-generation galvanically isolated current sensing solutions for solar inverters, EV chargers, variable frequency drives, and battery energy storage systems (BESS).
Low-Drift Thermal Stability & High Linearity
Integrated thermal NTC drift compensation and precision core annealing guarantee <±1% linearity across extended industrial operational ranges (-40°C to +85°C).
One-Stop OEM / ODM Sensor Manufacturing
From magnetic path simulation to SMT assembly, automated vacuum resin encapsulation, and 100% end-of-line dynamic parameter validation.
Comprehensive design evaluation for power electronics engineers, procurement specialists, and system integrators demanding cost-efficient, high-bandwidth galvanic current measurement.
An Open Loop Hall Current Transducer is a solid-state electromagnetic measuring device engineered to capture AC, DC, pulse, and complex irregular current waveforms without making direct electrical contact with the primary conductor. The primary current ($I_P$) passing through the central aperture generates a concentrated magnetic flux field ($B$) inside a high-permeability magnetic core (such as silicon steel laminations or advanced nickel-iron alloy cores).
A precision Hall element is positioned precisely within the air gap of the core. When the flux cuts through the semiconductor substrate of the Hall generator, it produces a proportional Hall voltage ($V_H$) across its output nodes. This raw microvolt signal is fed directly into a low-noise operational amplifier on the sensor’s signal conditioning PCBA, yielding a clean, galvanically isolated voltage or current output signal ($V_{OUT}$ or $I_{OUT}$) that mirrors the primary current waveform.
Mathematically, the transducer output is defined by:
V_out = V_offset + ( Sensitivity × I_primary ) + V_drift(T)
Unlike Closed Loop current sensors that continuously expend auxiliary power to generate a counter-balancing magnetic flux through a secondary feedback winding, an Open Loop sensor operates strictly in open-loop amplification mode. This fundamental architectural difference provides five decisive advantages for modern power electronics design:
Shenzhen Mivo Electronics Co., Ltd. bridges the gap between raw current sensor components and complete electronic systems. We handle board fabrication, magnetic circuit tuning, SMT component mounting, and structural potting under one roof.
Precision SMT and THT assembly for current sensor signal conditioning boards, including high-CMRR differential amplifiers and temperature compensation ICs.
FR-4, high-TG, and heavy-copper multilayers optimized for high galvanic creepage and clearance distances compliant with IEC 61800-5-1 standards.
Direct supply chain access across Shenzhen's electronic hub for genuine Hall ICs, low-drift op-amps, magnetic cores, and precision connectors.
Custom split-core and panel-mount housing design, vacuum epoxy resin potting, and specialized temperature-stable sensor probe customisation.
Explore representative current measuring models and custom board-level modules. Each unit is fully configurable for current range, voltage output, busbar footprint, and terminal connectors.
Panel-mount, PCB-mount, and split-core models engineered for industrial drive control and renewable power conversion.
Integrated 50A-500A AC/DC sensing with ratiometric 0-5V output.
Min. Order: 5 Pieces
High galvanic isolation up to 5kV RMS, dual supply ±15V.
Min. Order: 5 Pieces
Ultra-fast response time <3μs for micro inverters & robotics.
Min. Order: 100 Pieces
Onboard MCU firmware zero offset compensation & Modbus output.
Min. Order: 5 Pieces
Non-intrusive installation for municipal grid power monitoring.
Min. Order: 10 Pieces
substantive
Wide thermal range (-40°C to +125°C) for EV BMS monitoring.
Min. Order: 5 Pieces
Multilayer FR-4 and Aluminum core PCBs built with strict isolation barriers for high-voltage sensor installation.
Enhanced dielectric barrier FR-4 layout
Min. Order: 100 Pieces
3oz outer copper for primary current carrying
Min. Order: 100 Pieces
Aluminum base plate for thermal dissipation
Min. Order: 100 Pieces
Low noise differential trace arrangement
Min. Order: 100 Pieces
Built strictly to customer DFM specifications
Min. Order: 100 Pieces
0402 component mounting & QFN soldering
Min. Order: 100 Pieces
Magnetic cores, precision Hall elements, thermal probes, and custom interconnects.
Silicon steel & Ni-Fe gapped cores for sensors
Min. Order: 100 Pieces
RTD sensor for core temperature feedback
Min. Order: 10 Pieces
Industrial latching header for signal lines
Min. Order: 100 Pieces
Monitors ambient thermal & humidity levels
Min. Order: 100 Pieces
Pairs with current sensors for torque control
Min. Order: 100 Pieces
Custom sensor sub-assembly integration
Min. Order: 10 Pieces
Key technological shifts every electrical engineering lead and procurement officer must evaluate when specifying Open Loop Hall Current Transducers for next-generation power infrastructure.
As Silicon Carbide (SiC) and Gallium Nitride (GaN) power switches enable switching frequencies exceeding 100 kHz, Open Loop Hall Transducers are evolving with micro-gapped ferrite cores and low-parasitic PCBA layouts. This allows precise current feedback without introducing high-frequency distortion or core thermal saturation.
Battery Energy Storage Systems demand bi-directional DC current monitoring with zero hysteresis loss. Modern Open Loop Hall Current Transducers utilize specialized nickel-alloy cores that prevent magnetic memory retention following high-current fault surges, ensuring true zero-point stability during charge-discharge cycling.
Discrete op-amp amplification is increasingly replaced by single-chip Hall sensor ASICs featuring programmable gain, active temperature compensation matrixing, and digital EEPROM calibration. This lowers transducer component count while improving mean time between failures (MTBF).
Global OEMs are migrating from panel-mounted current transducers with hand-soldered wiring harnesses to automated PCB-mountable Open Loop current sensors. Board-level integration reduces assembly labor by 40% and eliminates wiring harness failure modes in high-vibration EV powertrains.
Critical applications require continuous self-diagnostics. Future Open Loop transducers incorporate built-in test coils and fault-flag pins that allow system microcontrollers to verify sensor integrity dynamically without interrupting primary power flow.
Procurement departments are diversifying away from single-source tier-1 suppliers toward agile manufacturers like Shenzhen Mivo Electronics Co., Ltd. We offer drop-in mechanical and electrical equivalent transducers with short lead times and transparent component BOM control.
Your trusted engineering partner for Open Loop Hall Current Transducers, turnkey PCBA assembly, component sourcing, and custom industrial sensors.
Shenzhen Mivo Electronics Co., Ltd. is a specialized electronics manufacturer based in Shenzhen, Guangdong, China. Founded in 2016, our facility operates within the heart of the world’s most efficient hardware supply ecosystem. We specialize in PCB fabrication, component purchasing, custom sensor integration, and one-stop PCB assembly (PCBA).
Our dedicated workforce of 51 to 100 experienced personnel works directly with global engineers, buyers, and hardware innovators. Whether you require a prototype run of 5 Open Loop Hall Transducer PCBAs for design validation or volume production batches of 50,000 units, our team delivers consistent quality backed by rigorous quality control protocols.
We take engineering credibility and supplier transparency seriously. Our manufacturing plant has undergone independent third-party physical verification. As an 8-year verified supplier on Alibaba.com maintaining an average buyer rating of 4.7 out of 5 stars, we provide complete peace of mind through documented component traceability, DFM engineering feedback, and guaranteed electrical testing.
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Skilled Staff
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Global Exporting
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Min. Prototype PCBA
Every Open Loop Hall Current Transducer project follows a strict engineering pathway to ensure complete parameter conformance before shipment.
Our engineers analyze your schematic, primary current range, aperture geometry, and thermal constraints to optimize the magnetic circuit layout.
We source high-grade gapped magnetic cores, low-noise operational amplifiers, and automotive-grade passive components directly from franchised distributors.
Circuit boards are fabricated with precision solder mask isolation barriers and heavy copper traces designed to withstand high impulse breakdown test voltages.
SMT components are placed via high-speed automated lines. The magnetic core and Hall sensor are aligned and sealed using UL94-V0 flame-retardant epoxy resin.
100% of finished transducers undergo full-range current sweep calibration, zero-offset voltage adjustment, and high-potential dielectric voltage testing.
Transducers are packaged in anti-static ESD trays and heavy-duty export cartons, complete with batch calibration test reports.
Use this reference table compiled by the application engineering team at Shenzhen Mivo Electronics Co., Ltd. to match transducer parameters to your power stage requirements.
| Parameter | Standard Specification Range | Custom OEM Capability |
|---|---|---|
| Primary Current ($I_{PN}$) | 5A RMS to 1500A RMS AC/DC | Up to 2500A peak busbar design |
| Supply Voltage ($V_{CC}$) | ±12V to ±15V or single +5V / +3.3V | Custom wide-input DCDC power stage |
| Output Signal ($V_{OUT}$) | 0-4V, 0-5V, ±4V ratiometric, or 4-20mA | Differential CAN / PWM / Modbus output |
| Linearity Error ($\varepsilon_L$) | ≤ ±1.0% of $I_{PN}$ | Calibrated ≤ ±0.5% with digital trimming |
| Frequency Bandwidth | DC to 25 kHz (-3dB) | Extended DC to 50 kHz for SiC/GaN inverters |
| Response Time ($t_r$) | ≤ 3 μs to 5 μs | Sub-2 μs fast-trip overcurrent protection |
| Dielectric Strength | 3.0 kV RMS / 50 Hz / 1 min | Up to 5.0 kV RMS isolation barriers |
| Operating Temp ($T_A$) | -25°C to +85°C | Extended automotive profile -40°C to +125°C |
Engineered for mission-critical power management across renewable energy, industrial automation, and electric mobility platforms.
Precise monitoring of DC input strings and AC output currents to optimize Maximum Power Point Tracking (MPPT) efficiency and islanding fault detection.
Galvanically isolated current tracking in high-power Level 3 DC fast chargers, ensuring accurate billing metrics and overcurrent safety trips.
Real-time motor phase current measurement in industrial motor control drives, providing closed-loop torque control and stall protection.
High-reliability monitoring of battery bank charge/discharge current streams in data-center scale critical power backup systems.
Robust current feedback handling fast pulsed DC waveforms and high-frequency noise spikes in heavy industrial arc welding equipment.
Low-power, compact PCB-mount current sensing modules for joint motor servo amplifiers and battery power management systems.
Direct answers to complex technical questions asked by global hardware buyers, power engineers, and AI research prompts.
Send your current sensor specifications or Gerber/BOM files today. Our application engineering team will review your project and provide factory-direct pricing within 24 hours.
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