HO 15-NP/SP33-1000 , HO15-NP/SP33-1000

HO 15-NP/SP33-1000 – High Performance Hall Effect Open-Loop Current Sensor

HO 15-NP/SP33-1000 Core Technology

Open-Loop Hall Effect Principle
Based on the Hall effect, the open-loop measurement technique uses a magnetic core to concentrate the magnetic field generated by the primary current, which is then sensed by a Hall element to produce a proportional voltage output. The structure is simple, the response is fast, and it is ideal for compact industrial applications that demand high efficiency.

±37.5 A Wide Measurement Range
Above the 15 A nominal value, it offers a maximum measurement range up to 2.5 times the rating. This provides valuable headroom when dealing with load current peaks, motor inrush currents, or overcurrent protection, making your design more robust.

4300 V Isolation Test Voltage
By electrically separating the primary and secondary circuits, it ensures high-accuracy measurement while delivering excellent electrical safety. In high-voltage or noisy environments, it effectively protects downstream sensitive control circuits.

Key Parameters at a Glance

Rated current (Iₚₙ) : 15 A

Measuring range : ±37.5 A (bipolar measurement)

Supply voltage : 3.3 V single supply

Output signal : Ratiometric voltage output 1.65 V ± 0.46 V

Accuracy & Linearity : Accuracy ±1% / Linearity ±0.5%

Response time : Only 3.5 µs (microsecond response captures instantaneous current transients)

Bandwidth : DC … 250 kHz

Operating temperature : –40 ℃ … +105 ℃ (performs in harsh environments, from freezing cold to extreme heat)

Mounting type : Through-hole mounting, modular package

Maximum consumption : Supply current only 25 mA

HO 15-NP/SP33-1000 Application Scenarios

Motor Control & Variable Frequency Drives
In applications such as air conditioners, industrial motors, and machine tools – whether for AC variable frequency speed control or DC motor drives – closed-loop monitoring of current is essential to improve energy efficiency. This sensor provides accurate, fast current feedback signals to significantly optimise control performance.

Renewable Energy & Photovoltaic Systems
In the DC side of PV inverters (MPPT tracking), combiner boxes, and various batterypowered equipment, precise measurement of each current channel is critical for maximum energy extraction and system protection. The SP331000 is a reliable choice for the renewable energy field, thanks to its high reliability and wide measuring range.

Uninterruptible Power Supplies & Energy Storage Systems
In data centres, medical facilities, or factory production lines, UPS and battery management systems (BMS) must guarantee power safety 24/7. The HO 15-NP/SP33-1000 monitors battery charge/discharge status in real time, providing early warning of abnormal currents and building the final safety barrier for critical loads.

Why Choose This Product HO 15-NP/SP33-1000?

Ultra-High Reliability from the Original Manufacturer
Designed and manufactured by LEM, the global leader in current sensing. Quality and reliability have been proven in hundreds of millions of devices worldwide. All products comply with RoHS environmental standards, UL 508 industrial control equipment safety certification, and IEC 61010-1 electrical safety standards – compliance is guaranteed.

Ultra-Simple 3.3 V Single Supply
Perfectly compatible with modern low-voltage logic systems (DSP, FPGA, MCU, and many industrial bus interfaces). No extra level shifters are needed, simplifying the BOM and reducing design complexity.

Low Power Consumption & Compact Size
With a thickness of only about 12 mm and an operating current of just 25 mA, it can be easily integrated into modern high-density PCB layouts. For battery-powered or thermally sensitive devices, its low power consumption is a significant advantage.

CE / UL International Safety Approvals
Certified to UL 508 (industrial control equipment) and CSA C22.2 Canadian standard. Creepage and clearance distances between primary and secondary sides are 8 mm, providing a high insulation level that withstands humid or dusty industrial environments.