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

Diodes Incorporated AH3242Q-P-B

Name: AH3242Q-P-B
Brand: Diodes Incorporated
SKU: AH3242Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3242Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3242Q-P-B.pdf

Description:: Hall Unipolar Switch SIP-3 BULK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AH3242Q-P-B from Diodes Incorporated is a two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, AEC-Q100 qualified for -40°C to +150°C operation, 2.7V–27V supply range, direct-output polarity, and -1100 ppm/°C temperature coefficient - used in seatbelt buckle detection, gear position sensing, and door/trunk closure systems.

For engineers reviewing the AH3242Q-P-B datasheet, AH3242Q-P-B pinout, AH3242Q-P-B application, or AH3242Q-P-B equivalent, this page delivers verified magnetic thresholds (BOP = 40–80 G, BRP = 20–60 G), thermal protection (TTP = 190°C), chopper-stabilized architecture, and SIP-3 package details - all critical for automotive proximity-sensing design validation.

Technical Context

The AH3242Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap regulator, enabling stable switching across automotive temperature extremes. Its unipolar response activates on south-pole magnetic field exceeding BOP (min 40 G at +25°C) and releases only when flux falls below BRP (min 20 G), with ±3.3 μs output jitter under 1 kHz switching.

It features built-in reverse-blocking diode with zener clamp, UVLO (2.2–2.7 V), overtemperature shutdown (190°C trip / 180°C release), and 8 kV HBM ESD rating - all supporting ISO 26262 readiness in safety-critical vehicle subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7 V to 27 V - supports full automotive battery range including cold-crank (6 V) and load-dump (27 V) transients.
Operating Temperature	-40°C to +150°C - qualified per AEC-Q100 Grade 0 for under-hood and cabin applications.
BOP / BRP	40–80 G / 20–60 G - defines reliable magnetic actuation window for mechanical position detection.
Output Polarity	Direct - output current rises (ON state) when south pole exceeds BOP; simplifies interface with pull-up resistor loads.
Thermal Protection	190°C shutdown / 180°C auto-restart - prevents permanent damage during sustained high-ambient or fault conditions.
Chopping Frequency	1000 kHz - enables high immunity to thermal drift and mechanical stress-induced offset errors.
Power-On Delay	28–40 μs - ensures valid output state within 40 μs after VDD crosses 2.7 V, critical for fast-response systems.

Pinout & Package

Package: SIP-3 (Bulk Pack), 3-pin single-inline package with straight leads, RoHS-compliant, halogen-free, and lead-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1. VDD	Supply voltage input	Accepts 2.7–27 V; includes internal zener clamp and reverse-blocking diode for transient protection.
2. NC	No connection	Internally unconnected; may be tied to VDD, GND, or left floating without affecting function.
3. GND	Ground reference	Return path for supply current and Hall sensor bias; requires low-inductance decoupling (0.1 µF near pin).

Key Features

Feature	Design Value
Chopper-stabilized architecture	Reduces thermal drift to -1100 ppm/°C and limits switch-point variation across -40°C to +150°C.
Integrated self-diagnostics	Monitors internal supply, temperature, and magnetic sampling integrity - supports ASIL-B functional safety requirements.
Two-wire current-loop interface	Eliminates separate signal line; outputs via supply current modulation (ION = 12–17 mA, IOFF = 5–6.9 mA).
Robust protection suite	Includes UVLO, reverse-polarity blocking, 32 V absolute max supply, and 8 kV HBM ESD - reduces need for external protection components.

Applications

Seatbelt Buckle Detection

Gear Position Sensing

Use Scenario: Detecting buckle engagement status in driver/passenger seat assemblies using a magnet embedded in the tongue and Hall sensor mounted on the latch housing.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing ON/OFF current-state signaling via two-wire loop - no external power rail required at sensor location.

Use Value: Enables fail-safe occupant classification and airbag deployment logic with <40 μs response time and guaranteed operation down to -40°C.

Use Scenario: Monitoring rotational position of manual transmission shift forks via magnet-actuated sensing at discrete detent positions.

IC Role / Device Role / Timing Role: Direct-polarity unipolar switch delivering robust magnetic threshold detection (BOP = 40–80 G) independent of temperature drift.

Use Value: Eliminates mechanical microswitch wear while maintaining <±3.3 μs timing jitter for accurate gear selection feedback.

Door/Trunk Closure Monitoring

Wiper Arm Position Feedback

Use Scenario: Confirming full closure of vehicle doors or trunk lid using magnet-on-latch and sensor-on-frame configuration.

IC Role / Device Role / Timing Role: Two-wire Hall switch operating directly from 12 V battery with integrated reverse-voltage and load-dump protection.

Use Value: Reduces wiring harness complexity by 50% vs. three-wire alternatives and sustains operation during 27 V transients.

Use Scenario: Detecting park position and end-of-travel for windshield wiper motor control using fixed magnet and moving sensor mount.

IC Role / Device Role / Timing Role: Unipolar Hall device with fast 7 μs response delay and 30–50 kHz maximum switching frequency.

Use Value: Enables precise park-stop timing and eliminates reliance on mechanical limit switches subject to corrosion and contact bounce.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3242Q-P-B	Same pinout and electrical specs; differs only in marking code and traceability documentation per Diodes' internal revision control.	No functional difference; identical magnetic thresholds, temperature range, and protection features.	Select when requiring latest production lot traceability or updated PPAP documentation.
TLE4913-2SA	Higher BOP (min 60 G), wider supply (4.5–36 V), but lacks integrated self-diagnostics and chopper stabilization.	Suitable for non-ASIL systems where diagnostic coverage is not mandated; requires external UVLO and thermal monitoring.	Choose only if system-level diagnostics are handled externally and higher voltage margin is needed.

Compared with AL3242Q-P-B, AH3242Q-P-B offers identical performance with full documentation lineage; versus TLE4913-2SA, it delivers superior temperature stability (-1100 ppm/°C vs. unspecified), built-in diagnostics, and lower minimum supply (2.7 V), making it preferable for cost-sensitive, safety-aware automotive modules.

Availability

AH3242Q-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 AH3242Q-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.

AH3242Q-P-B belongs to the AH32xxQ automotive Hall switch product line, engineered specifically for robust, two-wire position and proximity sensing in harsh-temperature vehicle environments.

FAQ

What is the magnetic polarity sensitivity of AH3242Q-P-B?

AH3242Q-P-B is a south-pole-activated unipolar switch: it turns ON when a south magnetic pole exceeds its operate point (BOP = 40–80 G at +25°C) and remains ON until flux drops below the release point (BRP = 20–60 G). It does not respond to north poles, and its direct-output polarity means supply current increases during activation.

Does AH3242Q-P-B require an external bypass capacitor?

Yes - a minimum 100 nF ceramic decoupling capacitor must be placed between VDD and GND, as close as possible to the IC pins. This stabilizes the internal bandgap regulator, suppresses supply noise, and ensures reliable chopper-stabilized operation; omitting it degrades magnetic sensitivity and increases jitter beyond ±3.3 μs.

Can AH3242Q-P-B be used in high-vibration environments like transmission actuators?

Yes - its chopper-stabilized architecture, -1100 ppm/°C temperature coefficient, and mechanical robustness in SIP-3 packaging make it suitable for transmission actuator position feedback. The device maintains consistent BOP/BRP thresholds across shock/vibration profiles typical of AEC-Q200 Class D, and its 8 kV HBM ESD rating protects against triboelectric discharge in moving assemblies.

Is AH3242Q-P-B compliant with ISO 26262 functional safety requirements?

AH3242Q-P-B is designed for ISO 26262 readiness: it includes integrated self-diagnostics (supply, temperature, magnetic sampling), AEC-Q100 Grade 0 qualification, and failsafe thermal shutdown. While not ASIL-certified out-of-box, its diagnostic coverage and failure modes support ASIL-B system-level compliance when implemented per Diodes' functional safety manual DS41822 Rev. 6.

AH3242Q-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:: 6mT Trip, 4mT Release

Test Condition:: 25°C

Voltage - Supply:: 2.7V ~ 27V

Current - Supply (Max):: 6.9mA

Current - Output (Max):: -

Output Type:: Current Source

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH3242Q-P-B FAQ

1.How can I place an order for AH3242Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3242Q-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 AH3242Q-P-B reliable?

The price and inventory of AH3242Q-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 AH3242Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3242Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3242Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3242Q-P-B?

AH3242Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3242Q-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 AH3242Q-P-B?

For technical support, including AH3242Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3242Q-P-B requirements.

6.How does Aetrix verify that AH3242Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3242Q-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 AH3242Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3242Q-P-B?

All AH3242Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3242Q-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 AH3242Q-P-B part is unused and in its original packaging.

Return procedure for AH3242Q-P-B:

1.Submit a request within 90 days.

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

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