HO 120-P
120A rated AEC-Q100 Grade 1 automotive current transducer for EV battery management and motor control applications
Product Overview
Description
The HO 120-P is a high-performance automotive-grade current transducer designed for electric vehicle applications including battery management systems and motor controllers. It meets AEC-Q100 Grade 1 (-40°C to +125°C) qualification requirements and provides 0.5% accuracy across the full automotive temperature range.
Featuring closed-loop Hall effect technology, the HO 120-P delivers fast <1μs response time and 200kHz bandwidth, enabling precise motor control and accurate battery current measurement. The sensor provides 3kV isolation voltage, ensuring safety in high-voltage EV systems up to 800V.
The HO 120-P is widely used in production electric vehicles for BMS current sensing, traction inverter phase current measurement, and DC-DC converter monitoring. Its compact PCB-mount package and single 5V supply operation simplify integration into automotive electronic control units.
Product Series
HO
Primary Application
Automotive Sensors
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Rated Current | 120A |
|---|---|
| Measurement Range | ±360A |
| Supply Voltage | 5V DC ±5% |
| Output Type | Analog Voltage |
| Accuracy | ±0.5% (-40°C to +125°C) |
| Response Time | < 1 μs |
| Bandwidth | 200 kHz |
| Isolation Voltage | 3 kV |
| Operating Temperature | -40°C to +125°C |
| AEC-Q100 Grade | Grade 1 |
Applications
Motor Drives
Variable frequency drives and servo motor controls
Power Supplies
SMPS, UPS, and industrial power systems
Renewable Energy
Solar inverters and wind turbine converters
EV Charging
Electric vehicle charging stations
FAE Expert Insights
"HO 120-P is an excellent choice for industrial applications."
— Field Application Engineer, BeiLuo
Frequently Asked Questions
What does AEC-Q100 Grade 1 qualification mean for HO 120-P?
AEC-Q100 Grade 1 qualification for HO 120-P means: 1) Temperature range - Guaranteed operation from -40°C to +125°C ambient; 2) Reliability testing - Passed 1000+ hours high temperature operating life (HTOL) at maximum temperature; 3) Temperature cycling - Survived 1000+ cycles from minimum to maximum temperature; 4) Humidity testing - Passed biased humidity testing (85°C/85%RH) for 1000+ hours; 5) ESD protection - HBM 2kV, CDM 500V minimum; 6) Process control - Manufactured under IATF 16949 quality system with full traceability; 7) PPAP documentation - Complete production part approval process documentation available. This qualification ensures the sensor meets automotive OEM requirements for 15-year vehicle life. Grade 1 is suitable for most passenger vehicle under-hood and interior applications. For extreme temperature locations (near motors, exhaust), Grade 0 (-40 to +150°C) may be required.
AEC-Q100 Grade 1 is sufficient for most EV applications. For extreme environments (>125°C), consider Grade 0 variants. Always verify your OEM's specific qualification requirements.
How does HO 120-P maintain 0.5% accuracy across the full temperature range?
The HO 120-P achieves 0.5% accuracy from -40°C to +125°C through several design techniques: 1) Closed-loop Hall effect architecture - The feedback mechanism inherently compensates for many temperature effects; 2) Temperature-compensated Hall element - Proprietary Hall sensors with low temperature coefficient; 3) Precision reference circuits - Internal voltage and current references with low drift; 4) Compensation algorithms - Some variants include digital compensation; 5) Quality manufacturing - Tight process control and calibration during production. This temperature stability is critical for BMS applications where current measurement error directly causes SOC estimation error. Many competing sensors specify accuracy only at 25°C, with 2-3x worse accuracy at temperature extremes. When evaluating automotive current sensors, always check the accuracy specification across the full automotive temperature range, not just at room temperature.
The 0.5% accuracy over temperature is critical for BMS SOC estimation. When comparing sensors, verify accuracy is specified across the full automotive temperature range, not just at 25°C.
Can HO 120-P be used for both BMS and motor control applications?
Yes, the HO 120-P is suitable for both BMS and motor control applications, though with different considerations: For BMS - The 0.5% accuracy supports accurate SOC estimation; <1μs response is much faster than needed for battery current (milliseconds timescale); 200kHz bandwidth exceeds BMS requirements; 3kV isolation provides safety margin for high-voltage batteries. For motor control - The <1μs response and 200kHz bandwidth support field-oriented control algorithms; 0.5% accuracy provides good torque control; 120A rating suits many EV traction motors; 360A peak capability handles motor overloads. The HO 120-P is a versatile sensor that can serve both applications, which is valuable for platform designs using common components. For very high-performance motor drives, dedicated faster sensors may be preferred, but for most EV applications, the HO 120-P provides an excellent balance of performance and cost.
HO 120-P is versatile enough for both BMS and motor control in most EVs. For high-performance motors requiring extremely fast response, dedicated high-bandwidth sensors may be preferred.