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Specifications
Standby Current:
10mA
working temperature:
-25℃~+85℃
Current Range:
±70A
Voltage - Supply:
-15V~-12V;12V~15V
Band Width:
200kHz
Response Time (tr):
1us
Bidirectional Current Detection:
Support
Mfr. Part #:
LA55-P/SP50
Package:
SIP-3
Key Attributes
Model Number:
LA55-P/SP50
Product Description
Product Overview
The LA 55-P/SP50 is a closed-loop Hall effect current sensor designed for measuring DC, AC, and pulsed currents. It offers excellent accuracy, good linearity, low temperature drift, optimal response time, and wide bandwidth with no insertion loss and strong immunity to interference. The sensor features an insulated housing compliant with UL 94-V0 and is suitable for direct mounting on printed circuit boards.
Product Attributes
- Brand: LEM
- Model: LA 55-P/SP50
- Origin: Beijing, China
- Certifications: UL 94-V0, prEN 50178
- Housing Material: Insulated
Technical Specifications
| Parameter | Description | Value | Unit | Notes |
| Primary Current | Rated RMS Primary Current (IPN) | 50 | A | |
| Primary Current Measuring Range (IP) | 0 .. 70 | A | ||
| Overload Current (3 x IPN) | 0.3 | mA | IHC (Residual current after overload) | |
| Follow-up Accuracy (di/dt) | > 200 | A/s | ||
| Secondary Current | Rated RMS Secondary Current (ISN) | 50 | mA | |
| Conversion Ratio (KN) | 1:1000 | |||
| Secondary Coil Resistance (RS) @ TA = 70C | 80 | |||
| Secondary Coil Resistance (RS) @ TA = 85C | 85 | |||
| Power Supply | Supply Voltage (VC) | 12 .. 15 ( 5 %) | V | |
| Current Consumption (IC) @ 15 V | 10 + IS | mA | ||
| RMS Voltage for AC Insulation Test (Vd), 50 Hz, 1 min | 2.5 | kV | ||
| Measurement Resistance (RM) @ 12 V @ 50 A max | 100 | @ TA = 70C | ||
| Measurement Resistance (RM) @ 12 V @ 50 A max | 95 | @ TA = 85C | ||
| Measurement Resistance (RM) @ 15 V @ 50 A max | 160 | @ TA = 70C | ||
| Accuracy | Accuracy @ TA = 25C, @ 15 V ( 5 %) (X) | 0.5 | % @ IPN | |
| Linearity ( L) | < 0.15 | % | Typ | |
| Zero Offset Current (IO) @ TA = 25C | 0.2 | mA | ||
| Temperature Drift of Offset Current (IOT) 0C .. 70C | 0.1 .. 0.5 | mA | ||
| Temperature Drift of Offset Current (IOT) - 25C.. + 85C | 0.1 .. 0.6 | mA | ||
| Dynamic Parameters | Response Time (tra) @ 10 % of IP max | < 500 | ns | |
| Response Time (tr) @ 90 % of IP max | < 1 | s | ||
| Frequency Bandwidth | (-1dB) | DC .. 200 | kHz | |
| di/dt (Follow-up Accuracy) | > 200 | A/s | ||
| Environmental | Ambient Operating Temperature (TA) | -25 .. +85 | C | |
| Ambient Storage Temperature (TS) | - 40 .. + 90 | C | ||
| Mechanical | Mass (G) | 18 | g |
Applications
- Variable speed AC drives, servo motors
- Static converters for DC motor traction
- Battery supplies
- Uninterruptible Power Supplies (UPS)
- Switch Mode Power Supplies (SMPS)
- Welding power supplies
- Industrial applications
Advantages
- Excellent accuracy
- Good linearity
- Low temperature drift
- Optimal response time
- Wide bandwidth
- No insertion loss
- Strong immunity to interference
- Current overload capability
Notes
- Positive IS is when current flows in the direction of the arrow on IP.
- Primary conductor temperature should not exceed 90C.
- Dynamic performance (di/dt and response time) is optimal when the busbar completely fills the primary aperture.
- This module is a standard sensor. For different applications (supply voltage, turns ratio, unidirectional measurement), please contact us.
- For optimal magnetic coupling, the primary return coil must be located on the top surface of the device.
1912111437_LEM-LA55-P-SP50_C454691.pdf
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