HOB current sensors
A unique combination of short response time and high bandwidth for current sensing in harsh environments
Unmatched performance for SiC MOSFET applications
With a market-leading response time of < 200 ns – compared to average response times of around 3 microseconds – the HOB sensors are capable of measuring DC, AC or pulsed current up to 250A.
At the same time, the HOB product family is ideally suited to wide bandgap (WBG) power electronics use cases and applications that require enhanced immunity to the dv/dt (acceleration) issues that SiC power modules are prone to.
Moreover, the HOB parts offer a high bandwidth (> 1MHz), reinforced insulation with dCp/dCl > 11 mm, and an integrated primary conductor with very low resistance of 60 nΩ.
HOB current sensors utilize open-loop Hall effect technology, making them well-suited for a range of industrial applications. Among those applications stand handheld plasma cutters, welders, DC-DC converters, etc.
HOB – Features and benefits
Features
- Open loop Hall effect multi-range current transducer
- Voltage output
- Single power supply +5 V
- Galvanic separation between primary and secondary circuit
- Low power consumption
- Compact design for THT PCB mounting
- Factory calibrated
- 4 models to cover 4 nominal currents of 50, 75, 100 and 130 ARMS
Benefits
- Low offset temperature drift
- Creepage / clearance > 11 mm
- Unique short response time of < 200 ns
- High cut-off frequency up to 1 MHz
- Ideal for harsh environments with operating temperature range from -40 °C to +105 °C
- Lower noise and better dv/dt behavior vs other classical Hall Effect O/L sensors from the market
- Enhanced immunity
Typical applications
- AC variable speed drives and servo motor drives
- Static converters for DC motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Combiner box
- Solar inverter on DC side of the inverter (MPPT)
- Plasma cutter, welding
- Charging station
HOB transducers - Standards compliance
| HOB Series |
|---|
| IEC 61010-1: 2017 |
| IEC 61010-2-30: 2017 |
| IEC 61800-3: 2017 |
| IEC 61800-5-1: 2007 |
| IEC 62109-1: 2010 |
| UL 508: 2018 |
LEM HOB – Download & Technical Characteristic
| Product | Document | Primary nominal RMS voltage | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|
| HOB 50-P | 50 A | 5 to 5 | -40 to 105 °C | |
| HOB 50-P/SP1 | 50 A | 5 to 5 | -40 to 105 °C | |
| HOB 50-P/SP33 | Datasheet | 50 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 75-P | Datasheet | 75 A | 5 to 5 | -40 to 105 °C |
| HOB 75-P/SP1 | Datasheet | 75 A | 5 to 5 | -40 to 105 °C |
| HOB 75-P/SP33 | Datasheet | 75 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 75-P/SP34 | Datasheet | 75 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 100-P | Datasheet 3D |
100 A | 5 to 5 | -40 to 105 °C |
| HOB 100-P/SP1 | Datasheet | 100 A | 5 to 5 | -40 to 105 °C |
| HOB 100-P/SP33 | Datasheet | 100 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 100-P/SP34 | Datasheet | 100 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 130-P | Datasheet | 130 A | 5 to 5 | -40 to 105 °C |
| HOB 130-P/SP1 | Datasheet | 130 A | 5 to 5 | -40 to 105 °C |
| HOB 130-P/SP33 | Datasheet | 130 A | 3.3 to 3.3 | -40 to 105 °C |
| HOB 130-P/SP34 | Datasheet | 130 A | 3.3 to 3.3 | -40 to 105 °C |
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