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Hall effect measuring principle
| Accuracy @ IPN | ±1 % |
| Operating Temperature Range | ‒40 ... +105 °C |
| Isolation Test Voltage | 2.5 kV |
| Current Consumption (IC) | @ U = 5 V 19 (typ) mA |
| Output impedance | typ. 200 Ω |
| Load impedance | ≥ 200 kΩ |
Forklift drives, AC variable speed drives, Static converters for DC motor drives, Battery supplied applications, Uninterruptible Power Supplies (UPS), Switched Mode Power Supplies (SMPS), Power supplies for welding applications
The HTFS 400-P is a None current transducer from LEM for the electronic measurement of currents: DC, AC, pulsed..., with galvanic isolation, delivering a output impedance of typ. 200 Ω.
Typical applications include Forklift drives, AC variable speed drives, Static converters for DC motor drives and Battery supplied applications.
Key characteristics from the official datasheet: linearity error ±0.5 %; frequency bandwidth DC ... 240 kHz; operating temperature ‒40 ... +105 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | HTFS |
| Product Reference | HTFS 400-P |
| Supply Voltage | 5 V |
| Measurement | currents: DC, AC, pulsed... |
| Mounting | PCB Mount |
| Application Domain | Industrial |
| Electrical Data — HTFS 400-P | |
|---|---|
| Current Consumption (IC) | @ U = 5 V 19 (typ) mA |
| Output impedance | typ. 200 Ω |
| Load impedance | ≥ 200 kΩ |
| Load resistance | ≥ 2 kΩ |
| Output internal resistance | < 5 Ω |
| Load capacitance | = 4.7 nF |
| Supply voltage (±5 %) | 5 V |
| Accuracy & Dynamic Performance | |
|---|---|
| Accuracy @ IPN, TA = 25 °C, ±15 V | ±1 % |
| Linearity Error (εL) (0 ... ±IPN) | ±0.5 % |
| Frequency Bandwidth (−3 dB) | DC ... 240 kHz |
| Linearity error 0 ... 1.5 I (ε) | ≤ ±0.5 % |
| TCU Temperature coefficient of U | ≤ ±190 ppm/K |
| TCS Temperature coefficient of U | ≤ ±420 ppm/K |
| RMS noise voltage referred to primary (DC ... 20 MHz) (U) | < 40 mVpp |
| BW Frequency bandwidth (‒3 dB) | DC ... 240 kHz |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 2.5 kV |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | ‒40 ... +105 °C |
| Ambient Storage Temperature (TA st) | ‒40 ... +105 °C |
| Mass (m) | 60 g |
| Case Material | Insulating plastic case recognized according to UL 94-V0 |
Note: Specifications are taken from the official HTFS 400-P datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the HTFS 400-P.
Outline dimensions, pin layout and connection diagrams of the HTFS 400-P are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 60 g |
| Case Material | Insulating plastic case recognized according to UL 94-V0 |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the HTFS 400-P.
The characteristic curves of the HTFS 400-P from the official datasheet are shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Accuracy @ IPN, TA = 25 °C, ±15 V | ±1 % |
| Linearity Error (εL) (0 ... ±IPN) | ±0.5 % |
| Frequency Bandwidth (−3 dB) | DC ... 240 kHz |
| Linearity error 0 ... 1.5 I (ε) | ≤ ±0.5 % |
| TCU Temperature coefficient of U | ≤ ±190 ppm/K |
| TCS Temperature coefficient of U | ≤ ±420 ppm/K |
| BW Frequency bandwidth (‒3 dB) | DC ... 240 kHz |
| Reference Conditions | |
|---|---|
| Ambient Temperature (TA) | 25 °C, unless otherwise noted |
| Output Load Resistance (RL) | ≥ 2 kΩ |
Note: Refer to the datasheet for the complete set of characteristic curves.
Other models of the HTFS share the same measurement principle, mounting concept and output interface family.
