New product.
LEM CASR 25-NP/SP3 current transducer, a precision electronic sensor designed to measure AC, DC and pulsed currents.
It uses closed-loop Fluxgate technology, providing high measurement accuracy, stability and galvanic isolation between the primary and secondary circuits.
The device is designed for direct mounting on a printed circuit board (PCB) and operates with a single 5 V DC power supply. It features an analogue voltage output and an integrated or external voltage reference.
Suitable for industrial applications, power conversion systems, photovoltaic inverters, power supplies and electronic control systems.

⚙️ Main Features

• Brand: LEM
• Model: CASR 25-NP/SP3
• Visible code: 717105
• Technology: Closed-loop Fluxgate
• Rated primary current: 25 A RMS
• Measurement range: ±85 A
• Measurable current types: AC / DC / pulsed
• Power supply: 5 V DC
• Output signal: Analogue voltage
• Zero-current output voltage: Approximately 2.5 V
• Nominal sensitivity: 25 mV/A
• Specified accuracy: 0.8%
• Operating temperature: -40 °C to +105 °C
• Mounting: PCB
• Isolation: Galvanic isolation between primary and secondary circuits

🔧 Main Functions

• Accurate measurement of DC and AC current.
• Detection of pulsed currents.
• Conversion of the measured current into an analogue voltage signal.
• Galvanic isolation between the power circuit and the measurement circuit.
• Current monitoring in electronic and industrial systems.

🏭 Applications

According to LEM's official documentation, this sensor is suitable for:

• Photovoltaic inverters and renewable energy systems.
• AC motor drives and servo drives.
• Static converters for DC motors.
• Uninterruptible power supplies (UPS).
• Switching-mode power supplies (SMPS).
• Power supplies for welding applications.
• Electronic power conversion and control systems.

⭐ Advantages

• High measurement accuracy.
• Closed-loop Fluxgate technology.
• Low temperature drift of offset and gain.
• Good immunity to rapid voltage changes (dv/dt).
• Single 5 V power supply.
• Compact dimensions for PCB mounting.
• Galvanic isolation between primary and secondary circuits.

📦 Product Condition

New product.
Shows normal cosmetic signs of previous installation and handling.
Terminals are present and visible in the photographs.
Operation has not been tested.

📋 Sale Includes

• 1 LEM CASR 25-NP/SP3 current transducer.

Sold exactly as shown in the photographs.

Summary

LEM CASR 25-NP/SP3 current transducer rated at 25 A RMS, featuring closed-loop Fluxgate technology, a 5 V DC power supply and an analogue voltage output. Compact PCB-mount sensor suitable for photovoltaic inverters, power converters, power supplies and industrial applications.