CASR – Fluxgate current sensors
The CASR Series builds on the CAS platform by adding reference voltage access, enabling enhanced flexibility for signal conditioning and system‑level calibration. These Fluxgate current sensors are designed for accurate measurement of DC, AC, and pulsed currents, with nominal values typically ranging from 2 to 50 A RMS, while ensuring galvanic isolation.
Like CAS devices, CASR sensors are single‑supplied (+5 V) and intended for PCB mounting with three primary pins. Their closed‑loop Fluxgate technology delivers excellent accuracy, very low offset and gain drift, and stable performance over a wide operating range. The addition of reference access makes the CASR Series especially suitable for industrial designs requiring precise control of measurement scaling and offset.
CASR – 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
- LTSR compatible footprint
- 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
CASR electronic components are used in numerous industrial applications. Examples of their diverse uses include the following:
- 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 CASR – Download & Technical Characteristic
| Product | Check stock | Document | Nominal value | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| CASR 6-NP | Datasheet 3D | 6 A | 5 to 5 | -40 to 105 °C | |
| CASR 6-NP/SP1 | Datasheet 3D | 6 A | 5 to 5 | -40 to 105 °C | |
| CASR 6-NP/SP3 | Datasheet 3D | 6 A | 5 to 5 | -40 to 105 °C | |
| CASR 6-NP/SP6 | Datasheet 3D | 6 A | 5 to 5 | -40 to 105 °C | |
| CASR 15-NP | Datasheet 3D | 15 A | 5 to 5 | -40 to 105 °C | |
| CASR 15-NP/SP1 | Datasheet 3D | 15 A | 5 to 5 | -40 to 105 °C | |
| CASR 15-NP/SP3 | Datasheet 3D | 15 A | 5 to 5 | -40 to 105 °C | |
| CASR 15-NP/SP6 | Datasheet 3D | 15 A | 5 to 5 | -40 to 105 °C | |
| CASR 25-NP | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CASR 25-NP/SP1 | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CASR 25-NP/SP3 | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CASR 25-NP/SP6 | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CASR 25-NP/SP7 | Datasheet 3D | 25 A | 5 to 5 | -40 to 105 °C | |
| CASR 50-NP | Datasheet 3D | 50 A | 5 to 5 | -40 to 105 °C | |
| CASR 50-NP/SP1 | Datasheet 3D | 50 A | 5 to 5 | -40 to 105 °C | |
| CASR 50-NP/SP3 | Datasheet 3D | 50 A | 5 to 5 | -40 to 105 °C |
CASR Sensors – ASK FOR SAMPLES / QUOTATIONS
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