CSNP661 Honeywell Sensing and Productivity Solutions CSNP661 Board Mount Current Sensors Closed Loop Current, 50 Amps
The Honeywell CSNP661 redefines reliability for 50A current measurement, combining closed-loop Hall-effect precision with industrial-grade ruggedness. Whether ensuring safety in motor drives, optimizing solar inverters, or protecting EV charging systems, its null-balance technology delivers lab-grade accuracy in harsh real-world conditions ?C all while eliminating the losses and thermal challenges of shunt resistors.
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Request a QuoteThe Honeywell CSNP661 is a high-performance closed-loop Hall-effect current sensor designed for accurate AC/DC/pulse current measurement up to 50A continuous (90A peak). Leveraging Honeywell’s proven null-balance (zero-flux) feedback technology, this sensor delivers exceptional linearity and stability for power conversion, motor drives, renewable energy systems, and industrial automation where reliable current monitoring is critical.
As part of Honeywell’s CSN Series, this PCB-mount sensor provides galvanic isolation while converting measured current into a proportional voltage output across an external resistor. Its compact rectangular package accommodates through-hole, bus-bar, or pin-type current paths, making it adaptable to diverse system architectures from servo drives to EV charging stations.
Key Features
Closed-Loop Hall-Effect Technology
- Null-balance feedback system?compensates for nonlinearities, ensuring?<1% typical error
- Wide bandwidth (DC to 100kHz)?captures fast transients in PWM-driven systems
- Zero magnetic flux principle?minimizes temperature drift vs. open-loop sensors
Multi-Current Measurement Capability
- DC, AC, and impulse currents?(lightning surges, inrush currents)
- 50A continuous / 90A peak rating?(higher-range models available in CSN series)
- Galvanic isolation?between primary and measurement circuits
Robust Industrial Design
- Operating Temperature: -40??F to +185??F (-40??C to +85??C)
- 15VDC supply voltage?(standard industrial power rail)
- Solder-terminated PCB mounting?for compact integration
Flexible Installation Options
- Through-hole conductor?(for PCB trace integration)
- Bus-bar compatible?(high-current power distribution)
- Multi-pin terminal?configurations available in CSN series variants
Simplified Output Interface
- Current output?converted to voltage via external resistor (ROUT?= VOUT/ISENSE)
- Low 50mA switching current?minimizes self-heating
Comparison vs. Open-Loop & Shunt-Based Sensors
| Parameter | CSNP661 (Closed-Loop Hall) | Open-Loop Hall Sensor | Current Shunt |
|---|---|---|---|
| Accuracy | ??1% (typical) | ??3-5% | ??0.5-1% |
| Isolation | ✅ 2-5kV | ✅ 2-5kV | ❌ None |
| Power Loss | Very Low | Very Low | High (I2R heating) |
| Frequency Response | DC-100kHz | DC-25kHz | DC-50kHz |
| Temperature Drift | Compensated by feedback | Significant | Moderate |
| Cost | Medium | Low | Lowest |
Typical Applications
?Power Electronics & Energy
- Solar/wind inverter current monitoring
- DC-DC converter protection
- Battery management systems (BMS)
- UPS/PDU load balancing
Industrial Automation
- Servo motor drives
- Welding equipment
- PLC current loop monitoring
- Industrial PSU overcurrent protection
Electric Vehicles & Charging
- EV charger output measurement
- Traction motor current control
- OBC (On-Board Charger) systems
Smart Grid & Infrastructure
- Circuit breaker trip coordination
- Energy metering sub-systems
- Data center power distribution
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | CSNP661 |
| Technology | Closed-Loop Hall-Effect |
| Measurement Range | 0 to ??50A?continuous (??90A?peak) |
| Output Signal | Current (convertible to voltage via resistor) |
| Supply Voltage | 15VDC ??10% |
| Accuracy | ??1% FS?(typical at 25??C) |
| Bandwidth | DC to 100kHz?(-3dB) |
| Isolation Voltage | 2.5kV?(primary-secondary) |
| Operating Temp | -40??C to +85??C |
| Mounting | PCB (solder terminals) |
| Package | Rectangular, UL94 V-0 compliant |
| Switching Current | 50mA max |
Specification: Honeywell Sensing and Productivity Solutions CSNP661 Board Mount Current Sensors Closed Loop Current, 50 Amps
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