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

Diodes Incorporated AH3325Q-P-B

Name: AH3325Q-P-B
Brand: Diodes Incorporated
SKU: AH3325Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3325Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3325Q-P-B.pdf

Description:: HALL UNIPOLAR SWITCH SIP-3 BULK

Quantity:: RFQ Add To RFQ list

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Inventory:3,259

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Product details

Overview

AH3325Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC designed for proximity sensing in seatbelt buckles and gear position detection. It operates from 3.0V to 28V, features open-drain output with 60mA current limit, delivers BOP of 80–120G and BRP of 60–100G (SIP-3 package), and functions across –40°C to +150°C ambient.

For engineers reviewing the AH3325Q-P-B datasheet, AH3325Q-P-B pinout, AH3325Q-P-B application, or AH3325Q-P-B equivalent, this device supports robust magnetic sensing in high-voltage automotive subsystems where supply resilience, thermal stability, and ESD immunity (8kV HBM) are critical selection criteria.

Technical Context

The AH3325Q-P-B uses chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects on switching thresholds. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable operation over full automotive temperature range.

It implements unipolar South-pole activation logic with programmable hysteresis (15–31G), reverse-blocking diode, zener clamps on VDD and OUTPUT pins, and load-dump protection up to 40V transient-critical for 12V/24V vehicle electrical systems.

Key Specifications

Parameter	Value and Actual Design Meaning
BOP (Typ)	100 G - Magnetic operate point ensures reliable turn-on with standard automotive magnets at typical air gaps
BRP (Typ)	80 G - Release point provides 20G hysteresis margin to prevent chatter near threshold
VDD Range	3.0V to 28V - Supports direct connection to battery rail without external regulation in 12V/24V architectures
Output Type	Open-drain - Enables wired-OR configuration and flexible pull-up voltage selection (up to 32V)
t_{P_ON}	10 µs - Fast power-on startup enables real-time sensing in safety-critical actuation loops
I_OCL	30–55 mA - Internal current limiting protects output stage during short-circuit or capacitive load transients
ESD HBM	8 kV - Meets stringent automotive ESD requirements for assembly and field reliability
T_A Range	–40°C to +150°C - Validated for under-hood and cabin-mounted applications per AEC-Q100 Grade 0

Pinout & Package

Package: SIP-3 (Bulk Pack), 3-pin straight-lead surface-mount package with 2.54 mm pitch, RoHS-compliant and halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power input with integrated reverse-blocking diode and 40V transient clamp-accepts direct battery connection
2	GND	Ground reference for internal regulator and output stage; requires low-impedance PCB return path
3	OUTPUT	Open-drain N-channel MOSFET output with 60mA continuous rating, zener-clamped to 32V, and active current limiting

Key Features

Feature	Design Value
Chopper stabilization	Reduces thermal drift of BOP/BRP to <±0.5G/°C and eliminates mechanical stress-induced offset errors
40V load dump protection	Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count in body control modules
South-pole activation (marking side)	Enables consistent magnetic orientation mounting in SIP-3 packages-no polarity ambiguity during assembly
8kV HBM ESD rating	Eliminates need for external ESD protection in door/trunk closure sensors exposed to human contact
Bandgap-regulated internal supply	Stabilizes comparator and amplifier bias across VDD variation and temperature, ensuring ±3% BOP tolerance over full range

Applications

Seatbelt Buckle Detection

Gear Position Sensing

Use Scenario: Detect buckle insertion status in driver/passenger seats using a magnet embedded in the tongue and AH3325Q-P-B mounted on the latch housing.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital occupancy signal to airbag control unit with <10µs response latency.

Use Value: Eliminates mechanical microswitch wear; maintains function after 100,000+ cycles and survives vibration per ISO 16750-3.

Use Scenario: Monitor P/R/N/D gear selector position in automatic transmission assemblies via rotating cam with embedded magnets.

IC Role / Device Role / Timing Role: Magnetic position sensor feeding discrete gear-state signals to transmission control module (TCM).

Use Value: Resists oil contamination and thermal cycling; operates reliably at 150°C near torque converter housing.

Door/Trunk Closure Monitoring

Steering Column Lock Activation

Use Scenario: Confirm door or trunk lid fully closed using magnet on moving panel and AH3325Q-P-B on fixed frame.

IC Role / Device Role / Timing Role: Proximity detector generating wake-up interrupt for body control module (BCM) upon closure event.

Use Value: Immune to water ingress and salt fog; meets IP6K9K requirements when potted with conformal coating.

Use Scenario: Verify mechanical engagement of steering lock solenoid by sensing plunger position with embedded magnet.

IC Role / Device Role / Timing Role: Safety-critical position feedback element in immobilizer system, directly tied to CAN gateway diagnostics.

Use Value: AEC-Q100 Grade 0 qualification ensures functional safety compliance for ASIL-B relevant subsystems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3325Q-P-B	Same BOP/BRP specs but lower ESD rating (4kV HBM) and no AEC-Q100 qualification	Restricted to non-safety-critical consumer or industrial use; not PPAP-capable	Select only for cost-sensitive non-automotive designs where qualification and robustness are secondary
TLE4913-2SA	Higher BOP (120–160G), 5V-only supply, integrated pull-up, no load-dump protection	Requires external 5V regulator and TVS; suitable for low-voltage submodules only	Choose when system already provides regulated 5V and needs higher sensitivity in compact layouts

Compared with AL3325Q-P-B and TLE4913-2SA, AH3325Q-P-B uniquely combines wide 3–28V operation, 40V load-dump tolerance, AEC-Q100 Grade 0, and 8kV ESD-making it the only drop-in solution for direct-battery automotive proximity sensing without auxiliary protection or regulation.

Availability

AH3325Q-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 AH3325Q-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 computing markets.

The AH332XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in harsh automotive environments with extended temperature and voltage demands.

FAQ

What magnetic pole activates the AH3325Q-P-B in SIP-3 package?

The AH3325Q-P-B in SIP-3 (Bulk Pack) requires a South pole applied to the part marking side to activate. This is confirmed in the magnetic characteristics table (page 4 of DS46150 Rev. 2–2), which specifies "South pole to the part marking side" for SIP-3 packages. Polarity orientation is physically encoded in package design and must be verified during mechanical integration.

Does AH3325Q-P-B require an external pull-up resistor?

Yes-AH3325Q-P-B has an open-drain output and requires an external pull-up resistor (RL) between OUTPUT and VDD or another logic-rail voltage. The datasheet recommends RL = 1kΩ for timing validation and notes that rise time depends on RL and load capacitance; values from 1kΩ to 10kΩ are commonly used in automotive designs.

Can AH3325Q-P-B operate directly from a 24V truck battery?

Yes-AH3325Q-P-B is rated for continuous operation from 3.0V to 28V and withstands 40V load-dump transients per ISO 7637-2. It is validated for 24V commercial vehicle applications including transmission actuators and HVAC compressors, with no external regulation required under nominal or surge conditions.

Is AH3325Q-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), SC59, and SIP-3 packaging options and 3-pin pinout (VDD-GND-OUTPUT). Only magnetic thresholds differ; electrical interface, timing, protection, and thermal behavior are identical across the family.

AH3325Q-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:: 12mT Trip, 6mT 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

AH3325Q-P-B FAQ

1.How can I place an order for AH3325Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3325Q-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 AH3325Q-P-B reliable?

The price and inventory of AH3325Q-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 AH3325Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3325Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3325Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3325Q-P-B?

AH3325Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3325Q-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 AH3325Q-P-B?

For technical support, including AH3325Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3325Q-P-B requirements.

6.How does Aetrix verify that AH3325Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3325Q-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 AH3325Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3325Q-P-B?

All AH3325Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3325Q-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 AH3325Q-P-B part is unused and in its original packaging.

Return procedure for AH3325Q-P-B:

1.Submit a request within 90 days.

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

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