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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH3324Q-P-B

Name: AH3324Q-P-B
Brand: Diodes Incorporated
SKU: AH3324Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3324Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3324Q-P-B.pdf

Description:: HALL UNIPOLAR SWITCH SIP-3 BULK

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Product details

Overview

AH3324Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC in SIP-3 (Bulk Pack) package, operating from 3.0V to 28V supply, with BOP = 60–100 G and BRP = 40–80 G, delivering open-drain output switching for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring in harsh under-hood environments.

For engineers reviewing the AH3324Q-P-B datasheet, AH3324Q-P-B pinout, AH3324Q-P-B application, or AH3324Q-P-B equivalent, this device supports high-voltage transient immunity (40V load dump), chopper-stabilized temperature stability (−40°C to +150°C), and robust ESD protection (8kV HBM), making it suitable for safety-critical proximity sensing where magnetic hysteresis and supply resilience are design-critical.

Technical Context

The AH3324Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, enabling stable magnetic threshold operation across −40°C to +150°C ambient. Its architecture includes sample-and-hold amplification, low-pass filtering, and a power switch driving a single open-drain output.

Magnetic actuation requires South pole orientation toward the part marking side for SIP-3 packages, with hysteresis (BHY = 14–29 G) ensuring noise-immune state retention. The device integrates reverse-blocking diode, zener clamps on VDD and OUTPUT, and output current limiting (30–55 mA) for fault resilience in automotive 12V/24V systems.

Key Specifications

Parameter	Value and Actual Design Meaning
BOP (Operate Point)	60–100 G: Magnetic field strength required to pull output low; enables reliable activation with small magnets at air gaps up to 3 mm.
BRP (Release Point)	40–80 G: Minimum field reduction needed to release output; provides 14–29 G hysteresis to prevent chatter near threshold.
VDD Range	3.0–28 V: Supports direct connection to automotive battery rails including cold-crank (6V) and load-dump (up to 40V transient).
Output Type	Open-drain: Allows flexible pull-up to any voltage ≤32 V; compatible with 3.3V, 5V, or 12V logic interfaces via external RL.
Startup Time	10 µs typical: Ensures rapid system readiness after power-on; output valid within 10 µs of VDD reaching 3V.
ESD Rating	HBM 8 kV / CDM 1 kV: Withstands handling and board-level electrostatic events without latch-up or parametric shift.
Operating Temp	−40°C to +150°C: Validated for engine bay, transmission, and HVAC actuator mounting locations per AEC-Q100 Grade 0.

Pinout & Package

SIP-3 (Bulk Pack) package: 3-pin straight-lead surface-mount package with gull-wing leads, optimized for automated placement and reflow soldering in automotive production lines.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power supply input; accepts 3.0–28 V with integrated reverse-blocking diode and 28 V zener clamp.
2	GND	Ground reference for internal regulator, Hall element, and output stage; must be low-impedance path to system ground.
3	OUTPUT	Open-drain NMOS output; sinks up to 60 mA; requires external pull-up resistor (RL) and optional noise-suppression capacitor (CIN = 10–100 nF).

Key Features

Feature	Design Value
Chopper stabilization	Reduces thermal drift of BOP/BRP to <±0.5 G/°C, enabling stable switching across full −40°C to +150°C range.
40 V load dump protection	Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count in body control modules.
South-pole actuation (marking side)	Eliminates need for magnet polarity verification during assembly; simplifies mechanical integration in seatbelt and door latch assemblies.
Zener clamps on VDD & OUTPUT	Prevents latch-up or damage during reverse-battery or inductive kickback events; no external protection components required.
AEC-Q100 Grade 0 qualification	Validated for 150°C junction operation with PPAP documentation support-meets OEM requirements for powertrain and chassis applications.

Applications

Seatbelt Buckle Detection

Gear Position Sensing

Use Scenario: Detect buckle insertion/removal in driver/passenger seats using embedded magnet and PCB-mounted AH3324Q-P-B.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing contactless, wear-free status signal to airbag control unit (ACU) or body controller.

Use Value: Eliminates mechanical switch failure modes; operates reliably through 100,000+ cycles and vibration per ISO 16750-3.

Use Scenario: Monitor P/R/N/D gear selector position in automatic transmission control units.

IC Role / Device Role / Timing Role: Magnetic position sensor interfacing with transmission ECU via open-drain output with configurable pull-up.

Use Value: Immune to oil contamination and temperature cycling; meets ASIL-B functional safety requirements when used with diagnostics.

Door/Trunk Closure Monitoring

HVAC Compressor Actuation

Use Scenario: Confirm door or trunk fully latched using magnet on striker plate and AH3324Q-P-B on latch assembly.

IC Role / Device Role / Timing Role: Proximity detector feeding status to vehicle security module or lighting control unit.

Use Value: Enables auto-lock/unlock and interior light control; survives repeated slamming and corrosion per GMW3172.

Use Scenario: Sense compressor clutch engagement/disengagement in automotive HVAC systems.

IC Role / Device Role / Timing Role: Hall-effect switch triggering compressor enable signal based on magnetic field change from rotating clutch hub.

Use Value: Replaces reed switches with higher reliability and longer lifetime; immune to shock-induced false triggers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Allegro A1120EUA-T	BOP = 20–40 G (lower sensitivity); SC59 package only; no load-dump rating.	Limited to cabin applications (≤105°C); unsuitable for under-hood use without external protection.	Select only for cost-sensitive non-powertrain applications where lower magnetic sensitivity suffices.
Melexis US1881EUA-ABA-001-SP	BOP = 30–60 G; built-in reverse-polarity protection; no zener clamp on output.	Requires external output clamp for 24V systems; not AEC-Q100 Grade 0 qualified (Grade 1 only).	Use where reverse-voltage risk exists but full Grade 0 thermal compliance is not mandated.

Compared with A1120EUA-T and US1881EUA-ABA-001-SP, AH3324Q-P-B delivers higher magnetic sensitivity (60–100 G BOP), full 40V load-dump tolerance, and AEC-Q100 Grade 0 qualification-making it the only option validated for direct integration into transmission, engine, and chassis control modules without derating or supplemental protection.

Availability

AH3324Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.

Supply support for AH3324Q-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 analog ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets.

The AH332XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, designed specifically for contactless position and proximity sensing in demanding automotive subsystems including body electronics, powertrain, and HVAC.

FAQ

What is the magnetic polarity requirement for AH3324Q-P-B actuation?

The AH3324Q-P-B in SIP-3 (Bulk Pack) requires a South pole applied to the part marking side to activate the output. This is confirmed in the datasheet's magnetic characteristics table and pin diagram. Applying North pole or misorienting the magnet results in no switching action. Polarity direction is fixed per package type and cannot be reversed via configuration.

Does AH3324Q-P-B require an external pull-up resistor?

Yes-AH3324Q-P-B has an open-drain output and requires an external pull-up resistor (RL) connected between VDD and the OUTPUT pin. Typical values range from 1 kΩ to 10 kΩ depending on rise time and bus voltage. The datasheet recommends pairing RL with a 10–100 nF bypass capacitor (CIN) on VDD for noise immunity in electrically noisy automotive environments.

Can AH3324Q-P-B operate directly from a 24V truck battery?

Yes-AH3324Q-P-B is rated for continuous operation from 3.0V to 28V and withstands 40V transients (ISO 7637-2 Pulse 5a). It includes internal reverse-blocking diode and zener clamps on both VDD and OUTPUT pins, eliminating need for external TVS diodes in standard 24V commercial vehicle applications.

Is AH3324Q-P-B pin-compatible with other AH332XQ variants?

Yes-all AH332XQ variants (e.g., AH3322Q, AH3325Q) share identical SIP-3 (Bulk Pack) pinout (VDD-GND-OUTPUT), same footprint, and identical electrical interface. Only magnetic thresholds (BOP/BRP) differ between part numbers; no layout or schematic changes are needed when upgrading sensitivity within the family.

AH3324Q-P-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP

Packaging:: Bulk

Product Status:: Active

Function:: Unipolar Switch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 10mT Trip, 4mT Release

Test Condition:: 25°C

Voltage - Supply:: 3V ~ 28V

Current - Supply (Max):: 4mA

Current - Output (Max):: 60mA

Output Type:: Open Drain

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 150°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH3324Q-P-B FAQ

1.How can I place an order for AH3324Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3324Q-P-B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AH3324Q-P-B reliable?

The price and inventory of AH3324Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3324Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3324Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3324Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3324Q-P-B?

AH3324Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3324Q-P-B order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AH3324Q-P-B?

For technical support, including AH3324Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3324Q-P-B requirements.

6.How does Aetrix verify that AH3324Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3324Q-P-B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH3324Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3324Q-P-B?

All AH3324Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3324Q-P-B, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AH3324Q-P-B part is unused and in its original packaging.

Return procedure for AH3324Q-P-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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