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

Diodes Incorporated AH3241Q-P-B

Name: AH3241Q-P-B
Brand: Diodes Incorporated
SKU: AH3241Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3241Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3241Q-P-B.pdf

Description:: Hall Unipolar Switch SIP-3 BULK

Quantity:: RFQ Add To RFQ list

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Inventory:975

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Product details

Overview

AH3241Q-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, and inverted output polarity; used in seatbelt buckle detection where magnetic presence triggers low-current off-state release upon south-pole field decay below 70 G (typ) at +25°C.

For engineers reviewing the AH3241Q-P-B datasheet, AH3241Q-P-B pinout, AH3241Q-P-B application, or AH3241Q-P-B equivalent, key selection criteria include its unipolar switching behavior, 6 mA typical off-state current, 14.5 mA on-state current, thermal shutdown at 190°C junction, and SIP-3 package compatibility with high-side/low-side sensing topologies.

Technical Context

The AH3241Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, delivering ±3.3 μs output jitter and <7 μs response delay under strong magnetic fields. Its unipolar latching logic responds only to south-pole flux exceeding 90 G (typ), releasing output when field drops below 70 G (typ).

Integrated protection includes reverse-voltage blocking diode, zener clamp on VDD, UVLO at 2.2 V, and auto-restarting thermal shutdown at 190°C junction temperature. The device operates in two-wire mode with no external pull-up, sourcing current directly into load via VDD–GND path.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 27 V - supports direct battery connection across automotive cold-crank (6.5 V) to load-dump (27 V) transients
Operating Temperature	-40°C to +150°C - qualified for under-hood and cabin-mounted position sensing without derating
BOP / BRP (25°C)	90 G / 70 G - defines magnetic hysteresis window for reliable bounce-free switching in noisy environments
IOFF / ION	6 mA / 14.5 mA - sets minimum load resistance (≈100 Ω typical) and power dissipation budget (≤17 mW @ 12 V)
Response Delay	7 μs - enables detection of fast-moving targets such as gear teeth or wiper arms up to 50 kHz
ESD Rating	HBM 8 kV, CDM 1 kV - meets ISO 10605 requirements for assembly-line handling and system-level ESD immunity
Thermal Shutdown	190°C trip, 180°C release - prevents permanent damage during sustained overtemperature events with automatic recovery

Pinout & Package

Package: SIP-3 (Bulk Pack), 3-pin single-inline package with straight leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height; optimized for through-hole mounting in space-constrained automotive modules.

Pin/Terminal	Circuit Role	Design Meaning
1 - VDD	Supply Input	Accepts 2.7–27 V; integrates reverse-blocking diode and zener clamp for transient protection
2 - NC	No Connection	Internally unconnected; may be tied to VDD, GND, or left floating without functional impact
3 - GND	Ground Reference	Serves as return path for both supply current and diagnostic leakage; requires low-inductance PCB layout

Key Features

Feature	Design Value
Chopper-Stabilized Sensing	Reduces thermal drift to 0 ppm/°C BOP shift - eliminates calibration in production for seat-position systems
Inverted Output Polarity	South-pole activation pulls output current low - simplifies interface with existing pull-up-based ECU inputs
Integrated Self-Diagnostics	Generates safe-mode current (1 mA typ) on fault - enables ASIL-B compliant failure detection per ISO 26262
Two-Wire Operation	No external pull-up required - reduces BOM count and PCB area in cost-sensitive door/trunk closure modules
AEC-Q100 Grade 0	Qualified to +150°C ambient - supports placement near HVAC actuators or transmission housings without heatsinking

Applications

Seatbelt Buckle Detection

Transmission Gear Position

Use Scenario: Detecting insertion/removal of seatbelt tongue in vehicle cabin with mechanical vibration and temperature cycling.

IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital presence signal to airbag control unit with <7 μs latency.

Use Value: Inverted polarity ensures default high-impedance state during power loss, preventing false unbuckled alerts.

Use Scenario: Monitoring rotational position of gear selector lever in automatic transmission assemblies.

IC Role / Device Role / Timing Role: Two-wire proximity sensor interfacing directly with transmission control module via shared power line.

Use Value: 27 V max rating withstands load-dump transients during gear-shift actuation without external TVS.

Door/Trunk Closure Sensing

Wiper Arm Position Feedback

Use Scenario: Confirming full closure of side doors or liftgate using magnet-activated reed-switch replacement.

IC Role / Device Role / Timing Role: Robust unipolar switch operating in high-humidity, salt-spray environments with IP6K9K-rated enclosures.

Use Value: Built-in reverse-polarity protection prevents damage during service technician battery reversal errors.

Use Scenario: Tracking multi-stop wiper park position across varying motor back-EMF and EMI conditions.

IC Role / Device Role / Timing Role: High-speed Hall sensor sampling magnetic pole transitions at up to 50 kHz during rapid wiper sweeps.

Use Value: Chopper stabilization maintains consistent BOP/BRP across -40°C to +150°C, eliminating seasonal recalibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3241Q-P-B	Same pinout and electrical specs; differs only in marking code and traceability documentation	Identical use in seatbelt and door sensing; no functional deviation	Select when Diodes' AL-series qualification path is required for Tier-1 PPAP submission
TLE4913-2SA	Higher BOP (120 G min), 5 V–24 V range, no integrated reverse-protection diode	Requires external reverse-battery protection; suited for engine bay locations with tighter magnetic thresholds	Choose for higher immunity to stray fields in transmission actuator housings where >100 G field strength is guaranteed

Compared with AH3241Q-P-B, AL3241Q-P-B offers identical performance with alternate compliance documentation, while TLE4913-2SA trades built-in protection for higher magnetic sensitivity-requiring external circuitry but enabling more robust detection in high-interference zones.

Availability

AH3241Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, transmission gear position monitoring, and door/trunk closure sensing requiring stable component supply across automotive production lifecycles.

Supply support for AH3241Q-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 devices for automotive, industrial, and consumer markets.

The AH324xQ series belongs to Diodes' automotive Hall-effect switch product line, designed specifically for AEC-Q100-compliant position and proximity sensing in safety-critical vehicle subsystems.

FAQ

What is the magnetic polarity response of AH3241Q-P-B?

AH3241Q-P-B is a south-pole-activated unipolar switch with inverted output polarity: it turns on (high supply current) when a south pole exceeds 90 G (typ), and turns off (low current) when flux decays below 70 G (typ). North pole exposure produces no switching action.

Does AH3241Q-P-B require an external pull-up resistor?

No. AH3241Q-P-B operates in true two-wire mode without external pull-up components. It sources current directly through the VDD–GND path, with output state determined by internal current regulation-enabling simplified wiring in harness-constrained automotive modules.

How does the integrated self-diagnostic function work?

Under fault conditions-including overtemperature, UVLO, or internal circuit failure-the AH3241Q-P-B enters safe mode, drawing 1 mA (typ) supply current. This distinct current signature allows host ECUs to detect faults without additional sensors or communication lines, supporting ASIL-B diagnostic coverage.

Can AH3241Q-P-B be used in high-vibration environments like door latches?

Yes. Its chopper-stabilized architecture delivers ±3.3 μs output jitter and minimal switch-point drift over temperature, while the SIP-3 package's mechanical robustness and 1000-cycle CDM ESD rating ensure reliability in high-vibration, high-humidity door closure applications per ISO 16750-3.

AH3241Q-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:: 9mT Trip, 7mT 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

AH3241Q-P-B FAQ

1.How can I place an order for AH3241Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3241Q-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 AH3241Q-P-B reliable?

The price and inventory of AH3241Q-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 AH3241Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3241Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3241Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3241Q-P-B?

AH3241Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3241Q-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 AH3241Q-P-B?

For technical support, including AH3241Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3241Q-P-B requirements.

6.How does Aetrix verify that AH3241Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3241Q-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 AH3241Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3241Q-P-B?

All AH3241Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3241Q-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 AH3241Q-P-B part is unused and in its original packaging.

Return procedure for AH3241Q-P-B:

1.Submit a request within 90 days.

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

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