The **HAS-52-R/Q** is a high-performance, open-loop Hall Effect current sensor manufactured by **LEM**. It is designed for the electronic measurement of DC, AC, and pulsed currents with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic interface). --- ### 1. Key Technical Specifications The "52" in the part number typically refers to the physical package size or a specific sensitivity rating within the HAS series. Below are the primary technical parameters: | Feature | Specification | | :--- | :--- | | **Nominal Current ($I_{PN}$)** | 50 A | | **Measuring Range ($I_{PM}$)** | ± 150 A | | **Output Signal ($V_{OUT}$)** | ± 4 V (at $I_{PN}$) | | **Supply Voltage ($V_C$)** | ± 15 V (± 5%) | | **Accuracy** | ± 1% of $I_{PN}$ (at $+25^\circ C$) | | **Linearity** | < ± 1% of $I_{PN}$ | | **Frequency Bandwidth** | DC to 50 kHz | --- ### 2. Physical Structure and Pinout The device is housed in a rectangular plastic case (PBT) that meets UL 94-V0 flammability standards. It features a hole (aperture) through which the primary conductor passes. #### Internal Components: * **Magnetic Core:** Concentrates the magnetic field generated by the primary current. * **Hall Generator:** A semiconductor chip located in the air gap of the core that produces a voltage proportional to the magnetic flux. * **Signal Conditioner:** An internal amplifier that converts the tiny Hall voltage into a usable 4V output signal. #### Pin Configuration: 1. **+Vc:** Positive Power Supply (+15V) 2. **-Vc:** Negative Power Supply (-15V) 3. **Output:** Voltage signal proportional to current 4. **0V:** Ground/Common reference --- ### 3. Suffix Meanings (R/Q) * **R:** Usually denotes compliance with specific environmental standards (like RoHS) or a specific revision of the internal circuitry for improved thermal stability. * **Q:** Often indicates "Quality" or "Automotive/Industrial Grade" testing, signifying higher reliability standards or specific screening processes for harsh environments. --- ### 4. Common Applications Due to its galvanic isolation and ability to measure both AC and DC, the HAS-52-R/Q is commonly used in: * **Variable Speed Drives:** Monitoring motor current. * **Uninterruptible Power Supplies (UPS):** Battery management and load monitoring. * **Welding Machines:** Feedback for output current control. * **Solar Inverters:** Tracking DC string currents or AC output. ---