CKSR – Fluxgate current sensors
The CKSR Series Fluxgate current sensors are designed for small‑current measurement with enhanced insulation performance and extended current capability. Supporting nominal currents from 1.5 up to 75 A RMS, CKSR sensors provide galvanic isolation and operate from a single +5 V supply, making them well suited for demanding industrial environments.
CKSR devices are designed for PCB mounting and feature four primary pins, with selected versions such as CKSR 75‑NP incorporating five primary conductors. This architecture increases creepage and clearance distances, improving insulation robustness. In addition, CKSR sensors offer reference voltage access, enabling flexible signal interfacing.
Leveraging closed‑loop Fluxgate technology, the CKSR Series delivers high accuracy, minimal drift, and measurement ranges extending up to 3 × Ipn.
CKSR – Features & Benefits
Main characteristics
- Closed loop Fluxgate (compensated) multi-range current transducer
- Voltage output
- Single supply
- Insulating plastic case material recognized according to UL 94-V0
- Compact design for PCB mounting
Benefits
- Very low temperature coefficient of offset
- Very good dv/dt immunity
- LKSR footprint compatible
- Higher creepage distance/clearance
- Reduced height
- Bandwidth DC to 300 KHz (+/- 3dB), 200KHz (+/- 1dB)
- Fast response time <0.3µs
- Reference pin with two modes: Ref IN and Ref OUT
- Extended measuring range for unipolar measurement
Typical applications
CKSR electronic components find applications across a wide range of industries. Some examples of their varied uses are listed below:
- AC variable speed and servo motor drives
- Static converters for DC motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications
- Solar inverters
LEM CKSR – Download & Technical Characteristic
| Product | Check stock | Document | Nominal value | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| CKSR 6-NP | Datasheet 3D | 6 A | 5 to 5 | -40 to 105 °C | |
| CKSR 15-NP | Datasheet 3D | 15 A | 5 to 5 | -40 to 105 °C | |
| CKSR 25-NP | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CKSR 25-NP/SP3 | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CKSR 50-NP | Datasheet 3D | 50 A | 5 to 5 | -40 to 105 °C | |
| CKSR 50-NP/SP1 | Datasheet 3D | 50 A | 5 to 5 | -40 to 105 °C | |
| CKSR 75-NP | Datasheet 3D | 75 A | 5 to 5 | -40 to 105 °C | |
| CKSR 75-NP/SP1 | Datasheet 3D | 75 A | 5 to 5 | -40 to 105 °C |
CKSR Sensors – ASK FOR SAMPLES / QUOTATIONS
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