Honeywell Sensing and Productivity Solutions CSNP661 Board Mount Current Sensors Closed Loop Current, 50 Amps
Current Sensors · Honeywell Sensing and Productivity Solutions
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 – all while eliminating the losses and thermal challenges of shunt resistors.
- 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
- Professional sourcingVetted supply chain with documented traceability
- Genuine partsDocumented traceability on every shipment
- ESD-safe handlingOriginal packaging, moisture controlled
- Worldwide shippingConsolidated freight to 100+ countries
Specifications
Core ratings and package details for this current sensors (CSNP661). Use the table below when comparing drop-in options or validating a schematic callout.
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Accuracy | ±1% (typical) ±3-5% ±0.5-1% | Technology | Closed-Loop Hall-Effect |
| Isolation | ✅ 2-5kV ✅ 2-5kV ❌ None | Measurement Range | 0 to ±50A continuous ( ±90A peak) |
| Power Loss | Very Low Very Low High (I2R heating) | Output Signal | Current (convertible to voltage via resistor) |
| Frequency Response | DC-100kHz DC-25kHz DC-50kHz | Supply Voltage | 15VDC ±10% |
| Temperature Drift | Compensated by feedback Significant Moderate | Bandwidth | DC to 100kHz (-3dB) |
| Cost | Medium Low Lowest | Isolation Voltage | 2.5kV (primary-secondary) |
Product Overview
Application context for CSNP661 (Honeywell Sensing and Productivity Solutions · Current Sensors) — what the part is for, how it is typically used, and the design points buyers ask about first.
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 |
Design Resources
Tutorial and application reading tied to CSNP661. These are editorial guides on this site, not manufacturer PDFs.
Frequently Asked Questions
4 practical questions buyers ask about CSNP661 — availability, specs, and how to request a quote.
What is CSNP661?
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 – all while eliminating the losses and thermal challenges of shunt resistors.
What type of component is CSNP661?
CSNP661 is a Current Sensors from Honeywell Sensing and Productivity Solutions.
What are the key specifications of CSNP661?
Output Signal: Current (convertible to voltage via resistor); 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.
Is CSNP661 in stock at MOZ Electronics?
CSNP661 is listed as in stock. Order online when a price is shown, or submit an RFQ for volume pricing and lead time.
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