Slkor SL1719SH Single S‑Pole Hall Sensor: Nano‑Amp Ultra‑Low‑Power Magnetic Control Switch Device

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2026-09-04 82

For battery-powered portable electronics, IoT terminals and small home appliances, non-contact magnetic detection switches impose strict requirements on standby power consumption, magnetic-pole anti-interference performance and long-term battery life. Mechanical contact switches suffer from wear and oxidation, resulting in short service life and false triggering. The Slkor SL1719SH is a single S-pole responsive micro-power Hall switch sensor in TO-92S through-hole package. It responds only to S-pole magnetic field, features an ultra-low average operating current of 0.9 μA with 25 Hz intermittent scanning and a maximum supply voltage of 5.5 V. Characterized by ultra-low standby power, directional magnetic-pole detection and stable switching output, it serves as a cost-effective domestic sensor chip for non-contact position sensing and open-close judgment in battery-operated products.

1. Core Electrical Parameters

Device Type: Single S-Pole Hall Switch Sensor Polarity: S-pole only (triggered by S-pole magnetic field only) Supply Voltage (VDD): 5.5 V Average Operating Current (IDD): 0.9 μA Scanning Frequency: 25 Hz Package: TO-92S

2. Core Product Advantages

2.1 Directional S-Pole Sensing with Strong Anti-Interference Capability

The chip only responds to S-pole magnetic-field signals; N-pole magnetic field will not trigger action. It effectively avoids false triggering caused by stray magnetic fields or reversed-magnet installation. Ideal for designs with fixed magnet polarity, it improves overall system detection reliability.

2.2 Nano-Ampere-Level Ultra-Low Power Consumption Extends Battery Life

Adopting intermittent sleep-wake-up scanning mechanism, the average operating current is as low as 0.9 μA. Extremely low static power draw greatly reduces power drain for battery-powered equipment and significantly prolongs service life of dry-cell and lithium-battery powered end products.

2.3 25 Hz Low-Speed Scanning Optimized for Open-Close Position Detection

The 25 Hz sampling rate is designed for low-speed status detection, meeting requirements for open-close state, limit position and magnet-presence judgment. It is not suitable for scenarios with rapidly changing magnetic fields and delivers outstanding performance in low-power detection applications.

2.4 TO-92S Through-Hole Package for Easy Assembly and Debugging

Standard 3-pin TO-92S through-hole package features mature soldering process, convenient manual welding and mass through-hole PCB production. It can directly replace traditional reed switches and mechanical contact switches.

2.5 Wide-Voltage Compatibility and Stable Output Performance

Maximum supply voltage reaches 5.5 V, compatible with lithium-battery, 3.3 V and 5 V MCU systems. Built-in temperature compensation circuit minimizes switch-point drift under varying temperatures. CMOS push-pull output can connect to MCU I/O pins directly without extra pull-up resistors.

2.6 Mature Domestic Solution with Stable Supply

Mass-production-validated Slkor SL1719SH guarantees consistent parameters and excellent ESD protection. It provides pin-to-pin compatibility with overseas equivalent single-S-pole low-power Hall sensors, easing pain points such as long lead-time and high cost of imported components for large-volume consumer-grade projects.

3. Main Application Fields

Benefiting from single-S-pole sensing, micro-power consumption and through-hole package, SL1719SH is widely adopted in battery-powered devices: charging-case open-close detection, magnetic-actuated switches for small home appliances, smart door locks, valve position monitoring, water / gas flow meters, wireless door-magnet detectors, low-power IoT sensor nodes, toy limit sensing, portable test instruments and various non-contact proximity switches.

4. Engineering Design Guidelines

Magnet-Pole Matching: This device responds only to S-pole. Ensure the S-pole faces the chip sensing surface in hardware design; N-pole cannot trigger output. Double-check magnet mounting orientation.

Power & Frequency Notice: The sensor works on 25 Hz intermittent scanning for low-speed status detection only. Do not use it for fast-changing magnetic-field conditions.

Power-Supply Design: Do not exceed 5.5 V supply voltage. Place a decoupling capacitor close to the power-supply pin to suppress power-supply noise.

Output Connection: Push-pull output; external pull-up resistor is not required. Connect directly to MCU I/O ports for level reading.

Magnet-to-Chip Distance: Properly set the gap between magnet and sensor to guarantee sufficient magnetic-field strength for reliable triggering.

Temperature Range: Operating temperature: -40 ℃ ~ +85 ℃. Avoid operation beyond this temperature range.

5. Product Summary

Slkor SL1719SH is a single-S-pole low-power Hall-effect switch sensor in TO-92S package. It supports maximum 5.5 V supply voltage, 0.9 μA ultra-low operating current and 25 Hz scanning frequency. Triggered exclusively by S-pole magnetic field, it features good stray-magnetic-field immunity and ultra-low power consumption. Well-suited for non-contact open-close and position detection in battery-powered equipment, it serves as an ideal domestic replacement for mechanical switches and reed switches.

Slkor introduction
According to Song Shiqiang, Slkor Semiconductor (https://www.slkormicro.com) grandly opened its third franchised store in Huaqiangbei on August 14, 2026. The store mainly offers MOSFETs, power-management ICs, Hall elements, optocouplers, IGBTs, SiC silicon-carbide components, AC/DC devices, TVS diodes, Schottky diodes, thyristors and other electronic components.

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