LEM HMSR-SMS Series Integrated Current Sensor
The LEM HMSR-SMS series is a new generation of highly insulated, open-loop integrated current sensors designed for measuring DC and AC currents in demanding switching power applications. These sensors offer a robust, compact, and accurate solution with reinforced insulation and user-configurable overcurrent detection. Their design provides high precision and strong immunity to external fields, making them suitable for high-voltage applications. The primary conductor is designed to withstand high surge currents, and the micro magnetic core ensures immunity to external fields, ideal for power electronics with high disturbance levels. The HMSR series offers a cost-effective, small, and low-profile solution with reinforced isolation, suitable for surface-mount PCB mounting.
Product Attributes
- Brand: LEM
- Product Family: HMSR-SMS series
- Origin: Not specified
- Material: Not specified (Case material V0 according to UL 94)
- Color: Not specified
- Certifications: IEC 61800-5-1: 2007, IEC 62109-1: 2010, IEC 60950-1: 2005, UL 1577: 2014, UL 62368-1, UL 1577, CSA Component Acceptance Service Notice N. 5 A
Technical Specifications
| Parameter | Symbol | Unit | HMSR 6-SMS | Comment |
| Primary nominal current | IP N | A | 6 | |
| Primary current, measuring range | IP M | A | 15 to 15 | With UC 4.6 V |
| Internal reference voltage @ IP = 0 A | UI ref | V | 2.48 - 2.5 - 2.52 | |
| Output voltage range @ IP M | Uout Uref | V | 2 to 2 | |
| DC supply voltage | UC | V | 4.5 - 5 - 5.5 | |
| DC current consumption | IC | mA | 20 - 26 | |
| Nominal sensitivity | SN | mV/A | 133.33 | 800 mV @ IP N |
| Sensitivity error | S | % | 0.75 to 0.75 | Factory adjustment |
| Sum of sensitivity and linearity error @ TA = 25 C | S L 25 | % of IP N | 1.5 to 1.5 | |
| Electrical offset voltage referred to primary | UO E | mV | 5 to 5 | Uout UI ref @ UI ref = 2.5 V |
| Electrical offset current referred to primary | IO E | mA | 37.5 to 37.5 | |
| Temperature coefficient of S | TCS | ppm/K | 220 to 220 | 40 C ... 125 C |
| Temperature coefficient of UI ref | TCUI ref | ppm/K | 150 to 150 | 40 C ... 125 C |
| Temperature coefficient of UO E | TCUO E | mV/K | 0.1 to 0.1 | 40 C ... 125 C |
| Ambient operating temperature | TA | C | 40 to 125 | |
| Ambient storage temperature | TA st | C | 55 to 165 | |
| Resistance of the primary @ TA = 25 C | RP | m | 0.76 | |
| Thermal resistance junction to board (case) | Rth JB | K/W | 18 | 1) |
| Thermal resistance junction to ambient | Rth JA | K/W | 19 | 1) |
| Mass | m | g | 1.4 | |
| RMS voltage for AC insulation test, 50 Hz, 1 min | Ud | kV | 4.95 | According to IEC 60950-1 |
| Impulse withstand voltage 1.2/50 s | UNi | kV | 8 | According to IEC 62109-1, IEC 61800-5-1 |
| Partial discharge RMS test voltage (qm < 5 pC) | Ut | V | 1650 | According to IEC 62109-1, IEC 61800-5-1 |
| Clearance (pri. - sec.) | dCI | mm | 8 | Shortest distance through air |
| Creepage distance (pri. - sec.) | dCp | mm | 8 | Shortest path along device body |
| Comparative tracking index | CTI | grade | 600 | |
| Application example System voltage RMS (Basic insulation) | V | 1000 | According to IEC 61800-5-1, IEC 62109-1, IEC 60950-1 CAT III, PD2 | |
| Application example System voltage RMS (Reinforced insulation) | V | 600 | According to IEC 61800-5-1, IEC 62109-1, IEC 60950-1 CAT III, PD2 | |
| Application example System voltage DC (Basic insulation) | V | 1500 | According to IEC 62109-1 CAT III, PD2 | |
| Application example System voltage DC (Reinforced insulation) | V | 800 | According to IEC 62109-1 CAT III, PD2 |
1) Done on LEM evaluation board PCB 6030.
2411011542_LEM-HMSR-6-SMS_C7460383.pdf
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