Specifications
Parameter Specification
Model Yokogawa UM330-01
Type Current Sensor Module
Rated Current 50 A RMS
Maximum Current 100 A RMS (continuous)
Output Current 50 mA RMS (at 50 A input)
Turns Ratio 1000:1
Accuracy Class ±0.04% of reading (at 45-66 Hz)
Phase Error ±0.05° (at 45-66 Hz)
Frequency Range DC to 100 kHz
Output Connector BNC type
Cable Length 3 meters
Operating Temperature -10°C to +50°C
Storage Temperature -25°C to +70°C
Safety Standards IEC 61010-1, CAT III 600 V
Dimensions Approximately 80 × 60 × 30 mm
Weight Approx. 300 g
Key Features
High accuracy: ±0.04% reading accuracy

Wide frequency range: DC to 100 kHz

Excellent phase characteristics: ±0.05° phase error

Modular design for flexible integration

BNC connector for easy connection

Robust construction for reliable operation

Safety compliance: CAT III 600 V rating

Electrical Characteristics
Rated input current: 50 A RMS

Maximum input current: 100 A RMS

Output current ratio: 50 mA output at 50 A input

Linearity: Excellent linearity within specified range

Temperature coefficient: Low temperature drift

Frequency response: Flat response from DC to 100 kHz

Environmental Specifications
Operating temperature: -10°C to +50°C

Storage temperature: -25°C to +70°C

Humidity: 85% RH or less (no condensation)

Altitude: 2000 m or below

Safety Features
Overcurrent protection: Built-in protection circuitry

Insulation resistance: 100 MΩ or more (500 V DC)

Dielectric strength: 3700 V AC (50/60 Hz) for 1 minute

Safety category: CAT III 600 V

Typical Applications
Precision current measurement with power analyzers

Motor efficiency testing and evaluation

Power converter and inverter characterization

Harmonic current measurement and analysis

Energy consumption monitoring

Research and development projects

Quality control in manufacturing