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Hall effect measuring principle
| Primary Current, Measuring Range | −62.5 ... 62.5 At |
| Internal Reference Voltage | 0.48 ... 0.52, 1.48 ... 1.52, 1.63 ... 1.67, 2.48 ... 2.52 V (2.5 V default) |
| Electrical Offset Voltage | −6 ... 6 mV |
| Step Response Time to 90 % of IPN | 3.5 µs (250 kHz filter) |
| Isolation Test Voltage | 4.3 kV |
| Operating Temperature Range | −40 ... 105 °C |
Extremely low profile 12 mm, AC variable speed and servo motor drives, Single power supply +5 V, Static converters for DC motor drives, Adjustable offset & sensitivity, Battery supplied applications, Adjustable over current detect (default: 2.9 × I peak value), PN, Uninterruptible Power Supplies (UPS), Adjustable response time and noise level, Switched Mode Power Supplies (SMPS), V pin with adjustable REF OUT & REF IN modes, ref, Power supplies for welding applications, Memory check, Renewable Energy (Solar and Wind), Standby mode with reduced consumption, Current range programming.
The HO 25-NPPR is a None current transducer from LEM for the electronic measurement of current: DC, AC, pulsed..., with galvanic isolation.
Typical applications include Extremely low profile 12 mm, AC variable speed and servo motor drives, Single power supply +5 V and Static converters for DC motor drives.
Key characteristics from the official datasheet: frequency bandwidth 250 kHz; operating temperature -40 … 105 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | HO |
| Product Reference | HO 25-NPPR |
| Primary Nominal Current | 25 A |
| Supply Voltage | 4.5 ... 5.5 V |
| Measurement | current: DC, AC, pulsed... |
| Mounting | PCB Mount |
| Application Domain | Industrial |
| Accuracy & Dynamic Performance | |
|---|---|
| Accuracy @ IPN | ±1.0 % of IPN |
| Accuracy @ IPN @ TA = +85 °C | ±3.4 % of IPN |
| Accuracy @ IPN @ TA = +105 °C | ±4.2 % of IPN |
| Sensitivity Error (εG) | ±0.5 % |
| Temperature Coefficient of G (TCG) | ±250 ppm/K |
| Linearity Error 0 .. IPN (εL) | ±0.5 % of IPN |
| Linearity Error 0 .. IPM (εL) | ±0.8 % of IPM |
| Temperature Coefficient of Vref (TCVref) | ±190 ppm/K |
| Temperature Coefficient of VO E (TCVOE) | ±0.12 mV/K |
| Magnetic Offset Voltage after 2.5 × IPN (VOM) | ±6 mV |
| Reaction Time @ 10 % of IPN (tra) | 2.0 µs (250 kHz filter) |
| Step Response Time to 90 % of IPN (tr) | 3.5 µs (250 kHz filter) |
| Frequency Bandwidth (-3 dB) (BW) | 250 kHz |
| Over-Current Detect (peak) | 2.6 ... 3.2 × IPN (peak) |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 4.3 kV |
| Impulse Withstand Voltage (1.2/50 µs) UNi | 8 kV |
| Partial Discharge Test Voltage (q < 10 pC) Um t | 1650 V |
| Creepage Distance (dCp) | 8 mm |
| Clearance (dCI) | 8 mm |
| Case Material | V0 according to UL 94 |
| Comparative Tracking Index (CTI) | 600 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... 105 °C |
| Ambient Storage Temperature (TA st) | −40 ... 105 °C |
| Surrounding Temperature according to UL 508 | 105 °C |
| Mass (m) | 5 g |
| Standards & Certifications | |
|---|---|
| IEC 61010-1 | Compliance |
| IEC 61326-1 | Compliance |
| UL 508 | 2010. |
| EN 50178 | 1997 |
| Electrical Data — HO 25-NPPR | |
|---|---|
| Primary Nominal RMS Current (IPN) | 25 At |
| Primary Current, Measuring Range (IPM) | −62.5 ... 62.5 At |
| Number of Primary Turns (NP) | 1, 2, 3 |
| Supply Voltage (UC) | 4.5 ... 5.5 V |
| Current Consumption (IC) | 25 mA |
| Internal Reference Voltage (Vref) | 0.48 ... 0.52, 1.48 ... 1.52, 1.63 ... 1.67, 2.48 ... 2.52 V (2.5 V default) |
| External Reference Voltage (Vref) | 0.5 ... 2.65 V |
| Electrical Offset Voltage referred to primary (VO E) | −6 ... 6 mV |
| Theoretical Sensitivity (Gth) | 32 mV/A |
Note: Specifications are taken from the official HO 25-NPPR datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the HO 25-NPPR.
Outline dimensions, pin layout and connection diagrams of the HO 25-NPPR are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Case Material | V0 according to UL 94 |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the HO 25-NPPR.
The characteristic curves of the HO 25-NPPR from the official datasheet are shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Accuracy @ IPN | ±1.0 % of IPN |
| Accuracy @ IPN @ TA = +85 °C | ±3.4 % of IPN |
| Accuracy @ IPN @ TA = +105 °C | ±4.2 % of IPN |
| Sensitivity Error (εG) | ±0.5 % |
| Temperature Coefficient of G (TCG) | ±250 ppm/K |
| Linearity Error 0 .. IPN (εL) | ±0.5 % of IPN |
| Linearity Error 0 .. IPM (εL) | ±0.8 % of IPM |
| Temperature Coefficient of Vref (TCVref) | ±190 ppm/K |
| Temperature Coefficient of VO E (TCVOE) | ±0.12 mV/K |
Note: Refer to the datasheet for the complete set of characteristic curves.
Other models of the HO Series share the same measurement principle, mounting concept and output interface family.
