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

Diodes Incorporated AH3243Q-P-B

Name: AH3243Q-P-B
Brand: Diodes Incorporated
SKU: AH3243Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3243Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3243Q-P-B.pdf

Description:: Hall Unipolar Switch SIP-3 BULK

Quantity:: RFQ Add To RFQ list

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Inventory:1,000

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Product details

Overview

AH3243Q-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 direct-output polarity. It delivers 6 mA off-state current, ±3.3 μs output jitter, and operates with south-pole magnetic activation (BOP = 27–63 G, BRP = 10–46 G) in seatbelt buckle and gear position sensing systems.

For engineers reviewing the AH3243Q-P-B datasheet, AH3243Q-P-B pinout, AH3243Q-P-B application, or AH3243Q-P-B equivalent, this page provides verified technical context, magnetic switching behavior, thermal protection thresholds, supply current profiles, and SIP-3 package implementation guidance for automotive proximity sensing designs.

Technical Context

The AH3243Q-P-B uses chopper-stabilized architecture to suppress offset drift and achieve -1100 ppm/°C temperature coefficient on magnetic thresholds. Its internal bandgap regulator supplies temperature-compensated bias to analog circuitry, enabling stable BOP/BRP across -40°C to +150°C ambient.

It implements two-wire current-loop operation: output state is encoded as high/low supply current (ION = 12–17 mA, IOFF = 5–6.9 mA), with UVLO (2.2–2.7 V), overtemperature shutdown (190°C trip, 180°C release), and reverse-voltage blocking up to -32 V. Magnetic response delay is ≤7 μs with 28–40 μs power-on stabilization.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 27 V - supports full automotive battery range including cold-crank and load-dump transients.
Operating Temperature	-40°C to +150°C - qualified per AEC-Q100 Grade 0 for under-hood and cabin applications.
BOP / BRP (25°C)	27–63 G / 10–46 G - low-field sensitivity enables use with small magnets in tight mechanical envelopes.
IOFF / ION	5–6.9 mA / 12–17 mA - two-wire current-loop output eliminates need for external pull-up; defines load resistor sizing.
Response Delay	≤7 μs - enables reliable detection of fast-moving targets such as rotating gears or wiper arms.
Thermal Shutdown	190°C trip, 180°C release - protects against sustained overtemperature without latch-up; auto-restarts when safe.
ESD Rating	HBM = 8 kV, CDM = 1 kV - exceeds automotive ESD immunity requirements for assembly and field operation.

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. Designed for through-hole mounting with 2.62 mm lead pitch and 1.27 mm e1 spacing.

Pin/Terminal	Circuit Role	Design Meaning
1. VDD	Supply voltage input	Accepts 2.7–27 V; includes built-in zener clamp and reverse-blocking diode for transient protection.
2. NC	No connection	Internally unconnected; may be tied to VDD, GND, or left floating-no electrical impact on operation.
3. GND	Ground reference	Return path for supply current; must be low-impedance to ensure stable chopper stabilization and thermal sensing.

Key Features

Feature	Design Value
Chopper-stabilized architecture	Reduces magnetic switch point drift to <±0.5 G over temperature, eliminating manual calibration in production.
Integrated self-diagnostics	Monitors internal regulator, UVLO, and thermal state; asserts error condition via reduced supply current (ISAFE = 0.5–1.5 mA).
Two-wire current-loop interface	Eliminates external pull-up resistors and simplifies wiring harnesses-only VDD and GND required for signal + power.
Automotive-grade protection	Includes reverse-polarity blocking, 32 V transient tolerance, and ISO 26262-ready functional safety architecture.
Direct-output polarity	Output current rises when south pole exceeds BOP-enables immediate compatibility with existing current-sense amplifiers.

Applications

Seatbelt Buckle Detection

Gear Position Sensing

Use Scenario: Detect buckle engagement status in driver/passenger seats using a small magnet embedded in the tongue and Hall sensor mounted in the receptacle.

IC Role / Device Role / Timing Role: Unipolar switch providing current-loop ON/OFF state encoding magnetic presence/absence at <50 G threshold.

Use Value: Enables fail-safe occupant classification for airbag control units with <7 μs response and AEC-Q100 reliability.

Use Scenario: Monitor rotational position of transmission shift drum via magnet array and fixed Hall sensor.

IC Role / Device Role / Timing Role: Two-wire proximity detector converting gear detent alignment into discrete current states for microcontroller ADC sampling.

Use Value: Reduces wiring complexity vs. three-wire solutions while maintaining 12–17 mA ON-state drive for robust noise immunity.

Wiper Arm Position

Window Lifter End-Stop

Use Scenario: Sense park position of windshield wiper arm using magnet on linkage and Hall sensor on motor housing.

IC Role / Device Role / Timing Role: Low-power unipolar switch operating from 12 V battery with UVLO and thermal shutdown for intermittent duty cycle.

Use Value: Eliminates mechanical limit switches-extends service life and reduces maintenance in high-humidity environments.

Use Scenario: Detect fully raised/lowered window position in automotive door modules using magnet on regulator cable and Hall sensor on bracket.

IC Role / Device Role / Timing Role: Direct-polarity Hall switch triggering motor cutoff at end-of-travel with ±3.3 μs jitter for precise timing control.

Use Value: Prevents motor stall damage and meets EU pedestrian protection regulations via accurate mechanical endpoint detection.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AH3242Q-P-B	BOP/BRP higher (40–80 G / 20–60 G); same -1100 ppm/°C TC and SIP-3 package.	Better suited for medium-field environments where magnet strength varies or air gap is larger.	Select when target flux density consistently exceeds 40 G and tighter BOP tolerance is needed.
TLE4913-2SA	Three-wire interface; 3.3–24 V supply; BOP = 5–15 mT; no integrated diagnostics or chopper stabilization.	Requires external pull-up and lacks self-test capability-increases BOM count and validation effort.	Choose only if legacy three-wire architecture mandates compatibility and diagnostic coverage is handled externally.

Compared with AH3242Q-P-B, AH3243Q-P-B offers lower magnetic thresholds for compact magnet integration, while TLE4913-2SA trades diagnostic autonomy and two-wire simplicity for broader vendor support but higher system-level design overhead.

Availability

AH3243Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, wiper arm positioning, and window lifter end-stop applications requiring stable component supply across automotive production lifecycles.

Supply support for AH3243Q-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 devices for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing.

AH3243Q-P-B belongs to the AH32xxQ automotive Hall switch family, designed specifically for AEC-Q100-compliant two-wire proximity sensing in harsh environments where reliability, diagnostics, and wide supply range are critical.

FAQ

What is the magnetic polarity requirement for AH3243Q-P-B operation?

The AH3243Q-P-B is a south-pole-activated unipolar switch: it turns ON when a south pole magnetic field exceeding BOP (27–63 G) is applied to the marked surface, and remains ON until flux drops below BRP (10–46 G). North pole exposure has no effect on output state.

Does AH3243Q-P-B require an external decoupling capacitor?

Yes-a minimum 100 nF ceramic capacitor must be placed between VDD and GND, as close as possible to the SIP-3 pins. This stabilizes the internal regulator, suppresses supply noise, and ensures reliable chopper stabilization and magnetic response within specified jitter limits.

How does the two-wire current-loop interface function electrically?

In the two-wire configuration, AH3243Q-P-B modulates supply current between IOFF (5–6.9 mA) and ION (12–17 mA) states. The external load resistor (typically 100 Ω) converts this current change into a measurable voltage drop, eliminating separate signal lines and simplifying harness design.

Is AH3243Q-P-B recommended for new designs?

No-the datasheet explicitly states "AH3241Q-AH3244Q/AH3280Q-AH3282Q ARE NOT RECOMMENDED FOR NEW DESIGNS." Customers should contact Diodes Incorporated for migration paths to next-generation Hall switches with enhanced diagnostics and extended qualification.

AH3243Q-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:: 4.5mT Trip, 2.8mT 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

AH3243Q-P-B FAQ

1.How can I place an order for AH3243Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3243Q-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 AH3243Q-P-B reliable?

The price and inventory of AH3243Q-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 AH3243Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3243Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3243Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3243Q-P-B?

AH3243Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3243Q-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 AH3243Q-P-B?

For technical support, including AH3243Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3243Q-P-B requirements.

6.How does Aetrix verify that AH3243Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3243Q-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 AH3243Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3243Q-P-B?

All AH3243Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3243Q-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 AH3243Q-P-B part is unused and in its original packaging.

Return procedure for AH3243Q-P-B:

1.Submit a request within 90 days.

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

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