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

Diodes Incorporated AH3328Q-P-B

Name: AH3328Q-P-B
Brand: Diodes Incorporated
SKU: AH3328Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3328Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3328Q-P-B.pdf

Description:: HALL UNIPOLAR SWITCH SIP-3 BULK

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Product details

Overview

AH3328Q-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 = 130–180 G and BRP = 105–160 G, delivering open-drain switching for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring in harsh under-hood environments.

For engineers reviewing the AH3328Q-P-B datasheet, AH3328Q-P-B pinout, AH3328Q-P-B application, or AH3328Q-P-B equivalent, this device supports high-voltage transient immunity (40V load dump), chopper-stabilized magnetic threshold stability across –40°C to +150°C, and robust ESD protection (8kV HBM), making it suitable for safety-critical proximity sensing where magnetic hysteresis and thermal drift control are essential.

Technical Context

The AH3328Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, enabling stable operation over its full –40°C to +150°C automotive temperature range. Its magnetic switching behavior is defined by fixed BOP/BRP thresholds and 16–33 G hysteresis, with polarity-dependent activation (South pole to part-marking side for SIP-3).

It features integrated reverse-blocking diode, zener clamps on VDD and OUTPUT pins, and output current limiting (30–55 mA), all supporting reliable open-drain switching into external pull-up loads without external protection components. Startup time is 10 µs typical after VDD reaches 3V.

Key Specifications

Parameter	Value and Actual Design Meaning
BOP (Operate Point)	130–180 G: Magnetic field strength required to activate output; enables reliable detection of moderate-strength magnets in mechanical assemblies.
BRP (Release Point)	105–160 G: Field level at which output releases; provides 16–33 G hysteresis to prevent chatter near threshold.
VDD Range	3.0–28 V: Supports direct connection to automotive battery rail including cold-crank (≥6 V) and load-dump transients (up to 40 V non-operational).
Output Type	Open-drain: Allows flexible pull-up to any voltage ≤32 V; compatible with 3.3 V, 5 V, or 12 V logic interfaces.
Operating Temp	–40°C to +150°C: Qualified for engine bay, transmission, and HVAC actuator locations per AEC-Q100 Grade 0.
ESD Rating	HBM 8 kV / CDM 1 kV: Ensures robustness during automated PCB assembly and in-field handling.
Startup Time	10 µs typical: Enables fast system response after power-on; output valid within microseconds of stable VDD ≥3 V.

Pinout & Package

SIP-3 (Bulk Pack) package: 3-pin single-inline package with gull-wing leads, optimized for high-reliability automotive mounting and reflow compatibility.

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 and Hall sensor; must be low-impedance for noise immunity.
3	OUTPUT	Open-drain output; sinks up to 60 mA with internal current limit and 28 V zener clamp for inductive load protection.

Key Features

Feature	Design Value
Chopper stabilization	Reduces thermal drift of BOP/BRP to <±0.5 G/°C, ensuring consistent switching across full temperature range.
40 V load dump tolerance	Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count in 12 V/24 V systems.
South-pole activation (marking side)	Enables intuitive mechanical integration-magnet placement aligned with visible part marking for SIP-3 packages.
Integrated zener clamps	Protects VDD and OUTPUT pins against overvoltage events up to 28 V, eliminating need for discrete clamping diodes.
AEC-Q100 Grade 0 qualification	Validated for operation up to +150°C junction temperature, supporting placement in high-heat zones like transmission housings.

Applications

Seatbelt Buckle Detection

Gear Position Sensing

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

IC Role / Device Role / Timing Role: Unipolar Hall switch providing contactless, wear-free status signal to body control module (BCM).

Use Value: Eliminates mechanical switch failure modes; operates reliably through vibration, dust, and temperature cycling from –40°C to +85°C ambient.

Use Scenario: Sense P/R/N/D positions in automatic transmission shifters via rotating cam with embedded magnets.

IC Role / Device Role / Timing Role: Magnetic position detector feeding discrete gear-state signals to transmission control unit (TCU).

Use Value: Delivers deterministic edge timing (<4 µs response delay) and immunity to EMI from nearby solenoids and motors.

Door/Trunk Closure Monitoring

HVAC Actuator Feedback

Use Scenario: Confirm latch engagement in power-operated doors and liftgates using magnet-in-latch and sensor-on-body configuration.

IC Role / Device Role / Timing Role: Proximity switch reporting closed/open state to door module for anti-pinch and lighting control.

Use Value: Maintains function during repeated slamming (mechanical stress immunity) and survives condensation/humidity exposure per IP6K9K.

Use Scenario: Monitor damper blade position in climate control systems using rotary magnet coupled to stepper motor shaft.

IC Role / Device Role / Timing Role: End-of-travel or mid-position indicator for HVAC blend/air mode actuators.

Use Value: Operates continuously at +105°C ambient inside HVAC housing; hysteresis prevents false toggling during slow mechanical movement.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3328Q-P-B	Same BOP/BRP specs and SIP-3 package, but manufactured by Allegro; slightly higher IDD (max 6 mA vs. 5 mA) and no AEC-Q100 Grade 0 certification.	Approved for non-safety-critical cabin modules only; not validated for engine bay or transmission use.	Select if cost sensitivity outweighs Grade 0 qualification requirements and thermal derating margin is acceptable.
TLE4913-2SA	Higher BOP (200–250 G), SC-59 package, 5 V–24 V range; lacks 40 V load dump rating and has lower ESD (4 kV HBM).	Requires external TVS for load dump; limited to lower-temperature zones (Grade 1: –40°C to +125°C).	Choose when higher magnetic sensitivity is needed and system-level protection can be added externally.

Compared with AL3328Q-P-B and TLE4913-2SA, AH3328Q-P-B uniquely combines AEC-Q100 Grade 0 qualification, 40 V transient tolerance, and SIP-3 bulk-pack logistics-making it the only option qualified for direct integration into safety-related powertrain and chassis subsystems without supplemental protection.

Availability

AH3328Q-P-B is available at Aetrix Electronics and suitable for automotive seat occupancy systems, transmission gear position feedback, and door/trunk closure monitoring requiring stable component supply across extended production lifecycles.

Supply support for AH3328Q-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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing.

The AH332XQ series targets automotive proximity sensing, delivering AEC-Q100-qualified Hall switches optimized for mechanical reliability, thermal stability, and system-level EMC robustness in harsh environments.

FAQ

What is the magnetic polarity requirement for AH3328Q-P-B activation?

The AH3328Q-P-B requires a South pole applied to the part-marking side of the SIP-3 package to activate. This is confirmed in the magnetic characteristics table for AH3328Q (SIP-3 variant), where BOPS is defined with South pole orientation toward the marking surface. Applying North pole or misaligned polarity will not trigger switching.

Can AH3328Q-P-B operate directly from a 24 V truck battery without external regulation?

Yes. The device operates over 3.0 V to 28 V and withstands 40 V transients per ISO 7637-2 Pulse 5a. Its internal bandgap regulator and zener clamps allow direct connection to 24 V systems, including cold-crank (down to ~6 V) and load-dump events, without external LDO or TVS components.

Does AH3328Q-P-B require an external capacitor on VDD?

Yes. A 10 nF to 100 nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND per the Typical Applications Circuit. This stabilizes the internal regulator, improves noise immunity, and ensures reliable startup within the specified 10 µs typical power-on time.

Is AH3328Q-P-B pin-compatible with other AH332XQ variants in SIP-3 package?

Yes. All AH332XQ variants-including AH3322Q through AH3321Q-in SIP-3 (Ammo Pack or Bulk Pack) share identical 3-pin SIP-3 footprint, pinout (VDD-GND-OUTPUT), and mechanical dimensions. Only magnetic thresholds differ; no layout change is needed when upgrading sensitivity grades.

AH3328Q-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:: 18mT Trip, 10.5mT 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

AH3328Q-P-B FAQ

1.How can I place an order for AH3328Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3328Q-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 AH3328Q-P-B reliable?

The price and inventory of AH3328Q-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 AH3328Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3328Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3328Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3328Q-P-B?

AH3328Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3328Q-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 AH3328Q-P-B?

For technical support, including AH3328Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3328Q-P-B requirements.

6.How does Aetrix verify that AH3328Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3328Q-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 AH3328Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3328Q-P-B?

All AH3328Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3328Q-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 AH3328Q-P-B part is unused and in its original packaging.

Return procedure for AH3328Q-P-B:

1.Submit a request within 90 days.

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

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