Diodes Incorporated AH41Z3-AG1

Overview

AH41Z3-AG1 from BCD Semiconductor Manufacturing Limited is a bipolar latched Hall-effect position sensor IC designed for electronic commutation in brushless DC motors. It integrates a Hall voltage generator, comparator, Schmitt trigger, and bandgap regulator; operates from 4V to 24V supply; delivers 50mA sink current; and functions across –40°C to +150°C in TO-92S-3 package.

For engineers reviewing the AH41Z3-AG1 datasheet, AH41Z3-AG1 pinout, AH41Z3-AG1 application, or AH41Z3-AG1 equivalent, this device serves as a magnetic field–activated switch with defined operate/release points (BOP/BRP), hysteresis (80–140 G), and open-collector output for motor phase control in high-temperature environments.

Technical Context

The AH41Z3-AG1 implements a latched switching architecture: a north pole triggers output low (ON), and only a south pole releases it (OFF). Its internal bandgap regulator enables stable operation across 4–24V supply and temperature extremes (–40°C to +150°C).

Magnetic sensitivity is graded-Grade A: BOP = 30–75 G, BRP = –75 to –30 G; Grade B: BOP = 5–105 G, BRP = –105 to –5 G-providing configurable field thresholds and 80–140 G hysteresis for robust noise immunity in motor control feedback loops.

Key Specifications

Pinout & Package

Package: TO-92S-3, low-profile through-hole package with 1.27 mm lead pitch and 4.6 mm body height, optimized for compact motor PCB layouts and automated insertion.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar latched Hall-effect position sensing applications.

Compared with A3291LUA-T and US1881EUA-ABA-002-SP, AH41Z3-AG1 offers higher output drive (50 mA), wider temperature range (–40°C to +150°C), and cost-effective TO-92S-3 packaging-making it optimal for thermally demanding, high-current BLDC commutation where external protection is already implemented.

Availability

AH41Z3-AG1 is available at Aetrix Electronics and suitable for brushless DC motor commutation, automotive HVAC blower control, and industrial pump speed monitoring requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH41Z3-AG1 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

BCD Semiconductor Manufacturing Limited is a China-based analog and mixed-signal IC design and manufacturing company specializing in power management, motor control, and sensor solutions.

The AH41 series belongs to BCD's Hall-effect position sensor product line, engineered specifically for robust, cost-sensitive electronic commutation in BLDC motors operating under harsh thermal and electrical conditions.

FAQ

What magnetic polarity activates the AH41Z3-AG1 output?

The AH41Z3-AG1 output turns ON (sinks current) when exposed to a sufficient north magnetic pole (BOP ≥30 G for Grade A). It remains latched ON until a south pole of adequate strength (|BRP| ≥30 G) is applied to turn it OFF. This latching behavior eliminates need for continuous field presence during motor rotation.

Does AH41Z3-AG1 require an external pull-up resistor?

Yes. The AH41Z3-AG1 features an open-collector output that requires an external pull-up resistor to VCC or another logic rail. Typical values range from 1 kΩ to 10 kΩ depending on rise time requirements and bus loading; 4.7 kΩ is commonly used for 12 V systems with ≤200 ns rise time.

Can AH41Z3-AG1 operate from a 3.3 V supply?

No. The absolute minimum supply voltage is 4 V per datasheet specifications. Operation below 4 V risks failure to activate the internal bandgap regulator and comparator, resulting in undefined output behavior or no switching. For 3.3 V systems, consider alternatives like Melexis US5881 or Diodes Inc. AH922.

Is AH41Z3-AG1 RoHS compliant and lead-free?

Yes. The "G1" suffix in AH41Z3-AG1 explicitly denotes BCD Semiconductor's RoHS-compliant, lead-free construction per EU Directive 2011/65/EU and JEDEC JS709. It meets green material standards with no exemptions applied and is compatible with standard Pb-free reflow profiles.