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

Diodes Incorporated AH3326Q-P-B

Name: AH3326Q-P-B
Brand: Diodes Incorporated
SKU: AH3326Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3326Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3326Q-P-B.pdf

Description:: HALL UNIPOLAR SWITCH SIP-3 BULK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AH3326Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC designed for position and proximity sensing in harsh environments. It operates from 3.0V to 28V, features open-drain output with 60mA current limit, BOP of 65–135G (typ. 100G), BRP of 50–120G (typ. 85G), and functions reliably from −40°C to +150°C - used in seatbelt buckle detection and transmission gear position sensing.

For engineers reviewing the AH3326Q-P-B datasheet, AH3326Q-P-B pinout, AH3326Q-P-B application, or AH3326Q-P-B equivalent, key selection factors include magnetic sensitivity tolerance, polarity-dependent mounting orientation (SIP-3 requires south pole to marking side), load dump immunity (40V), chopper-stabilized temperature stability, and SIP-3 bulk-pack mechanical compatibility with automated assembly.

Technical Context

The AH3326Q-P-B implements a chopper-stabilized Hall sensor architecture with dynamic offset cancellation, delivering minimal switch-point drift over temperature and superior immunity to mechanical stress and EMI. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable operation across the full −40°C to +150°C range.

It uses a single open-drain output stage with integrated overcurrent limiting (30–55mA) and zener clamps on both VDD and OUTPUT pins. Magnetic actuation is unipolar: output switches low when perpendicular flux exceeds BOP (100G typ.), remains latched until flux falls below BRP (85G typ.), with 15G typical hysteresis to prevent chatter.

Key Specifications

Parameter	Value and Actual Design Meaning
BOP (Operate Point)	65–135 G (typ. 100 G): magnetic threshold at which output pulls low; enables reliable detection of weak-field targets like small ferrous gears.
BRP (Release Point)	50–120 G (typ. 85 G): field level below which output releases; 15 G typical hysteresis prevents oscillation near threshold.
VDD Range	3.0–28 V: supports direct connection to automotive battery rails including cold-crank (≥6 V) and load-dump transients (with 40 V absolute max rating).
Output Type	Open-drain N-channel: allows flexible pull-up to any voltage ≤32 V; compatible with 3.3 V, 5 V, or 12 V logic interfaces.
Temp Range	−40°C to +150°C: validated for under-hood and cabin-mounted applications per AEC-Q100 Grade 0 requirements.
ESD Robustness	HBM 8 kV / CDM 1 kV: withstands handling and system-level electrostatic events without latch-up or parametric shift.
Startup Time	10 µs (typ.): ensures rapid response after power-on; output valid within 10 µs once VDD ≥3 V is reached.

Pinout & Package

Package: SIP-3 (Bulk Pack) - 3-pin straight-lead surface-mount package with 2.54 mm pitch, optimized for high-volume automotive PCB assembly and reflow compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power supply input; internally regulated and zener-clamped to 40 V transient; requires 10–100 nF decoupling capacitor.
2	GND	Ground reference for all internal circuits and output stage; must be low-impedance connection to minimize noise coupling.
3	OUTPUT	Open-drain N-channel output; sinks up to 60 mA; requires external pull-up resistor (RL); clamped to 28 V by internal zener.

Key Features

Feature	Design Value
Chopper stabilization	Reduces thermal drift of BOP/BRP to <±0.5 G/°C, enabling consistent switching across full automotive temperature range.
Reverse blocking diode + VDD zener clamp	Withstands −18 V reverse supply and 40 V load-dump transients without external protection components.
South-pole activation (SIP-3)	Requires magnet south pole facing part marking side - simplifies mechanical integration in seatbelt and door closure assemblies.
RF noise immunity	Validated against ISO 11452-2/4; maintains function during 100 MHz–2 GHz radiated RF fields up to 100 V/m.
AEC-Q100 Grade 0 qualification	Qualified for 150°C ambient operation with PPAP documentation support and IATF 16949 manufacturing traceability.

Applications

Seatbelt Buckle Detection

Transmission Gear Position Sensing

Use Scenario: Detecting buckle insertion/removal in automotive seating systems using a small permanent magnet embedded in the tongue.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing latched ON/OFF signal to body control module (BCM) via open-drain interface.

Use Value: Eliminates mechanical switch wear; operates reliably through vibration, dust, and temperature extremes (−40°C to +85°C cabin).

Use Scenario: Monitoring physical gear selector position in automatic transmissions using rotating ferrous target wheel.

IC Role / Device Role / Timing Role: Proximity sensor feeding discrete position state to transmission control unit (TCU) with <10 µs response latency.

Use Value: Enables fail-safe neutral-safety interlock and gear indicator accuracy without contact or optical alignment.

Steering Column Lock Actuation

Door/Trunk Closure Monitoring

Use Scenario: Confirming mechanical engagement of steering lock pin during vehicle start-up and shutdown sequences.

IC Role / Device Role / Timing Role: Hall-effect presence detector reporting lock/unlock status to immobilizer ECU via robust 12 V-compatible interface.

Use Value: Meets ISO 26262 ASIL-B functional safety requirements for anti-theft system integrity.

Use Scenario: Verifying full closure of doors or trunk lid using magnet mounted on moving panel and sensor on fixed frame.

IC Role / Device Role / Timing Role: Contactless position switch signaling closed state to door module; open-drain output interfaces directly with 5 V microcontroller GPIO.

Use Value: Prevents false "ajar" warnings caused by mechanical switch bounce or contamination in high-humidity environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3326Q-P-B	Same magnetic thresholds (BOP/BRP), identical SIP-3 package, but lacks AEC-Q100 qualification and 150°C rating.	Restricted to non-automotive industrial use; not PPAP-capable or IATF 16949 manufactured.	Select only for cost-sensitive non-automotive designs where Grade 0 qualification is unnecessary.
TLE4913-2SA	Higher BOP (120–170 G), wider VDD range (4.5–30 V), integrated reverse polarity protection, but SC-59 package only.	Requires board redesign for SC-59 footprint; no SIP-3 option available.	Choose when higher magnetic immunity or reverse-voltage tolerance is critical and SIP-3 mounting is not required.

Compared with AL3326Q-P-B, AH3326Q-P-B adds AEC-Q100 Grade 0 compliance, extended temperature capability (+150°C), and automotive-grade ESD/EMC robustness - essential for safety-critical OEM programs. Versus TLE4913-2SA, it offers SIP-3 mechanical compatibility and lower minimum operating voltage (3.0 V), enabling integration into low-power wake-up circuits.

Availability

AH3326Q-P-B is available at Aetrix Electronics and suitable for automotive seatbelt systems, transmission position monitoring, and steering column lock actuation requiring stable component supply across multi-year production cycles.

Supply support for AH3326Q-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.

The AH332XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in demanding automotive subsystems where reliability, temperature resilience, and electromagnetic robustness are mandatory.

FAQ

What is the correct magnet orientation for AH3326Q-P-B in SIP-3 package?

The SIP-3 (Bulk Pack) variant requires the south pole of the magnet to face the part marking side of the device. This orientation triggers the output to switch low when magnetic flux exceeds the operate point (BOP = 100 G typ.). Mounting with north pole facing the marking side will not activate the switch. Polarity direction is verified in the datasheet's magnetic characteristics diagram and differs from SC59 variants.

Does AH3326Q-P-B require an external pull-up resistor?

Yes - AH3326Q-P-B has an open-drain output and requires an external pull-up resistor (RL) connected between the OUTPUT pin and a positive supply (≤32 V). Typical values range from 1 kΩ to 10 kΩ depending on rise time and bus loading requirements. The datasheet recommends RL = 1 kΩ with CL = 20 pF for tR ≤ 1 µs. No internal pull-up is provided.

Can AH3326Q-P-B withstand automotive load dump events?

Yes - AH3326Q-P-B is rated for 40 V transient supply voltage (absolute maximum), meeting ISO 7637-2 Pulse 5a load dump immunity requirements when used with appropriate input filtering. Its integrated reverse-blocking diode and VDD zener clamp protect internal circuitry without external TVS diodes. However, sustained operation above 28 V is not recommended.

Is AH3326Q-P-B pin-compatible with other AH332XQ variants?

Yes - all AH332XQ variants (e.g., AH3322Q–AH3329Q, AH3320Q–AH3321Q) share identical SIP-3, SOT23 (Type S), and SC59 pinouts and footprints. Only magnetic sensitivity (BOP/BRP) and hysteresis differ between part numbers. Hardware design can remain unchanged when selecting alternate trip points for different mechanical air gaps or magnet strengths.

AH3326Q-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:: 13.5mT Trip, 5mT 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

AH3326Q-P-B FAQ

1.How can I place an order for AH3326Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3326Q-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 AH3326Q-P-B reliable?

The price and inventory of AH3326Q-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 AH3326Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3326Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3326Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3326Q-P-B?

AH3326Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3326Q-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 AH3326Q-P-B?

For technical support, including AH3326Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3326Q-P-B requirements.

6.How does Aetrix verify that AH3326Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3326Q-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 AH3326Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3326Q-P-B?

All AH3326Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3326Q-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 AH3326Q-P-B part is unused and in its original packaging.

Return procedure for AH3326Q-P-B:

1.Submit a request within 90 days.

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

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