PCB Mount Current Sensor
Whether you are designing EV traction inverters, smart grid infrastructure, or heavy-duty motor drives, PML PCB mount current sensors deliver precision AC/DC current measurement with up to ±0.5% linearity, under extreme operating conditions — direct-mounted to your board, with no daughter boards or bulky external connectors to design around.
UL94 V0
REACH
RoHS
Choose from our standard off-the-shelf HNCX (circular) and HNRX (rectangular) modules below, or request a custom sensor tailored to your application.
Why Direct PCB Mounting
- Simplified Design, Reduced Cost
Mounts straight onto your board — no daughter boards, no bulky connectors, no extra assembly step. Compare that to legacy sensing approaches, which typically demand extra daughter boards, higher long-term cost, and more places for something to go wrong.
- Up to ±0.5% Linearity
Precision current measurement for high-efficiency power management, verified on every unit.
- Automotive-Grade, ISO-Certified
Tested for EV duty cycles, with full global compliance — REACH, RoHS, and AEC-Q100-ready.
- Performance Stability
Low drift, pre-calibrated output for long-term measurement consistency — the reading doesn't wander as the sensor ages.
- Standard + Custom
Six standard series covering 100A–1001A, or a fully custom sensor engineered to your specification.
Explore Our Range of Sensors
Every PML PCB mount current sensor shares the same direct-mount philosophy. The difference between series is which trade-off they're built around: fail-safe protection (OCD), raw speed (Fast Response), or cost at volume (Cost Effective) — each available in circular (HNCx) or rectangular (HNRx) footprints.
HNCA Series
High-accuracy PCB-mounted current sensors from 300A to 1000A with 5V/3.3V support, <1% FS error, and built-in Over-Current Detection.
Rated Currents: 100A to 1000A
Supply Voltage: 5V or 3.3V (L)
FS Error: <1% FS
Feature: Over-Current Detection
Measurement: AC / DC / Pulsed DC
HNRA Series
Robust sensors for harsh environments, 300A–1000A, with 5V/3.3V options, <1% FS error and integrated OCD for system safety.
Rated Currents: 300A to 1000A
Supply Voltage: 5V or 3.3V (L)
FS Error: <1% FS
Feature: Over-Current Detection
Measurement: AC / DC / Pulsed DC
HNCB Series
Engineered for extremely fast response, 100A–1001A, with industry-leading <1% FS error and dedicated fast-response architecture.
Rated Currents: 100A to 1001A
Supply Voltage: 5V
FS Error: <1% FS
Feature: Fast Response
Measurement: AC / DC / Pulsed DC
HNRB Series
High-speed response and robust performance in 500A, 800A, 1000A, and 1001A variants — ideal for rapid transient measurement.
Rated Currents: 300A to 1001A
Supply Voltage: 5V
FS Error: <1% FS
Feature: Fast Response
Measurement: AC / DC / Pulsed DC
HNCC Series
Cost-effective PCB-mounted sensors in 5V and 3.3V versions, 300A–1000A, with strong <1.5% FS error performance.
Rated Currents: 300A to 1000A
Supply Voltage: 5V or 3.3V (L)
FS Error: <1.5% FS
Feature: Cost Effective
Measurement: AC / DC / Pulsed DC
HNRC Series
Cost-optimised with <1.5% FS error across 300A–1000A in both 5V and 3.3V versions — ideal for scalable, price-sensitive applications.
Rated Currents: 300A to 1000A
Supply Voltage: 5V or 3.3V (L)
FS Error: <1.5% FS
Feature: Cost Effective
Measurement: AC / DC / Pulsed DC
Where PML Current Sensors Are Trusted
Electric Vehicles
Motor control units, DC-DC converters, onboard chargers, battery management systems.
Industrial Automation
Drives, robotics, and precision motor control.
Solar & Renewable Energy
MPPT tracking, solar inverters, EV charging stations.
Appliances & White Goods
Compact, efficient current sensing for home and industrial equipment.
Why Buy From PML
- 65+ years of magnetic and sensing expertise — PCB mount current sensors are engineered by the same team that supplies current-sensing components to automotive and energy customers worldwide.
- ISO-certified manufacturing with stringent quality control on every batch.
- Global compliance — RoHS, REACH and UL94 V0 standards met as standard.
- Trusted by industry leaders in EV, renewable energy and industrial automation.
Need help selecting a model, or a custom specification? Talk to our engineering team and we'll match you to the right part — or design one.
Frequently Asked Questions
How do I choose between the HNCA, HNCB and HNCC families?
Choose HNCA/HNRA if your design needs built-in Over-Current Detection for fail-safe protection. Choose HNCB/HNRB if response speed is critical (short-circuit protection, fast transients). Choose HNCC/HNRC if you're optimising for cost at volume and <1.5% FS accuracy is sufficient.
Circular (HNCx) or rectangular (HNRx) — which footprint do I need?
Both offer the same electrical performance within a given family; the choice comes down to your PCB layout and available clearance. Rectangular models suit tight busbar-style layouts; circular models are the more common default.
Do these sensors measure AC, DC, or both?
PML PCB mount current sensors measure both AC and DC current, which is why they suit EV, renewable energy and motor-drive applications where current direction and waveform vary.
Can PML design a custom sensor for my application?
Yes — tell us your current range, voltage, footprint and accuracy requirement and our engineering team will match you to the right standard part or design a custom one.