Diodes Incorporated AH3376-P-B

Overview

AH3376-P-B from Diodes Incorporated is a high-voltage, low-sensitivity Hall effect unipolar switch IC designed for proximity and position sensing in consumer home appliances and industrial systems. It operates from 3.0V to 28V, features ±100G/±85G typical operate/release points (BOP/BRP), includes chopper stabilization for temperature stability, and delivers open-drain output with overcurrent limit and Zener clamping on VDD and OUTPUT pins.

For engineers reviewing the AH3376-P-B datasheet, AH3376-P-B pinout, AH3376-P-B application, or AH3376-P-B equivalent, this device supports robust contactless switching in high-noise, wide-temperature (-40°C to +125°C), and variable-supply environments-especially where magnetic polarity orientation and supply reverse protection are critical design factors.

Technical Context

The AH3376 employs dynamic offset cancellation via chopper-stabilized architecture, delivering <15G hysteresis (BHY) and <3.75µs response delay across -40°C to +125°C. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP thresholds independent of supply voltage drift.

It integrates reverse-blocking diode protection on VDD, Zener clamps on both VDD and OUTPUT pins, and active current limiting (30–55mA) on the open-drain output. Magnetic actuation is unipolar: South pole triggers turn-on only-North pole or zero field maintains OFF state-with polarity orientation dependent on package type (SIP-3 vs. SC59).

Key Specifications

Pinout & Package

Package: SIP-3 (Bulk Pack), straight-lead, RoHS-compliant, halogen-free "Green" construction. Dimensions: 4.10mm × 3.00mm × 1.50mm (L×W×H), with 1–2–3 pin layout viewed from top marking side.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unipolar Hall switch applications.

Compared with AH3376-P-B, AH3373-P-B offers higher magnetic sensitivity at the expense of reduced noise margin, while US1881LUA-AB3 sacrifices supply robustness and fault protection to meet lower-cost targets-making AH3376-P-B optimal for industrial-grade reliability in 24V environments.

Availability

AH3376-P-B is available at Aetrix Electronics and suitable for consumer appliance door detection, industrial flow metering, office equipment jam sensing, and motorized furniture position feedback requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3376-P-B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in high-reliability, application-optimized components for industrial, automotive, and consumer markets.

The AH3376 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free position and proximity sensing in harsh environments with wide supply and temperature requirements.

FAQ

What magnetic polarity activates the AH3376-P-B?

The AH3376-P-B is a unipolar switch activated exclusively by the South pole. For the SIP-3 (Bulk Pack) variant, the South pole must be presented to the part-marking side of the package. This orientation is fixed per package type and differs from SC59/SOT23 variants, where polarity direction flips relative to marking.

Can AH3376-P-B operate directly from a 24V supply without external regulation?

Yes. The AH3376-P-B is rated for continuous operation from 3.0V to 28V and includes internal Zener clamping and reverse-blocking diode protection. It draws only 3.5mA typical supply current at +25°C and remains functional across its full -40°C to +125°C range without external regulation or protection circuitry.

Does AH3376-P-B require an external capacitor on VDD?

Yes. A 10nF–100nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND per the datasheet to stabilize the internal regulator and enhance RF noise immunity. Omitting CIN may increase susceptibility to supply-line transients and degrade switching consistency in noisy environments.

How does the SIP-3 (Bulk Pack) package differ electrically from SOT23 or SC59 variants?

Electrically, all AH3376 variants-including AH3376-P-B (SIP-3 Bulk Pack)-share identical specifications: same BOP/BRP, voltage range, timing, and protection features. The only differences are mechanical: SIP-3 offers higher power dissipation (550mW vs. 230mW) and straight leads optimized for through-hole or selective soldering, not electrical performance.