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

Diodes Incorporated AH3382-P-B

Name: AH3382-P-B
Brand: Diodes Incorporated
SKU: AH3382-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3382-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP

Datasheet:: AH3382-P-B.pdf

Description:: MAGNETIC SWITCH UNIPOLAR 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,803

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Product details

Overview

AH3382-P-B from Diodes Incorporated is a high-voltage, ultra-high-sensitivity Hall effect unipolar latch IC with internal pull-up resistor, designed for proximity and position sensing in industrial and consumer appliances. It operates from 3.0V to 28V, features ±55G/±35G typical operate/release points (BOP/BRP), chopper-stabilized architecture for temperature stability, and integrated Zener clamps on supply and output pins. Used in contactless switches and flow meters where robust magnetic detection under wide voltage and temperature ranges is required.

For engineers reviewing the AH3382-P-B datasheet, AH3382-P-B pinout, AH3382-P-B application, or AH3382-P-B equivalent, this page delivers verified technical context, real-world magnetic thresholds, package-specific polarity behavior, internal pull-up resistance value (10–18 kΩ), and functional differences among SC59/SOT23/SIP-3 variants - all critical for mechanical integration and magnetic field orientation planning.

Technical Context

The AH3382 employs chopper-stabilized architecture with dynamic offset cancellation and an internal bandgap regulator, delivering <±0.2V output ON voltage at 20mA and <0.1µA leakage when off. Its magnetic switching is unipolar: South pole activation only, with polarity direction dependent on package type - South-to-marking-side for SIP-3 (Bulk Pack) and SOT23, but South-to-non-marking-side for SC59.

It integrates reverse-blocking diode, supply/output Zener clamps (28V), overcurrent-limited output (30–55mA), and operates across –40°C to +125°C. Start-up time is 10µs typical after VDD reaches 3V; response delay is 3.75µs; chopping frequency is 800kHz - enabling fast, stable switching in noisy industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.0V to 28V - supports direct connection to 24V industrial rails without external regulation.
Operate Point (BOP)	+55G typical - enables reliable actuation with low-strength magnets or increased air gaps.
Release Point (BRP)	+35G typical - provides 20G hysteresis to prevent chatter near threshold.
Output Type	Open-drain with internal 10–18 kΩ pull-up - eliminates need for external resistor in most applications.
Output Current Limit	30–55mA - protects internal switch during short-circuit or heavy capacitive loads.
ESD Rating	HBM >6kV - ensures robustness during handling and PCB assembly in high-volume manufacturing.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive accessories and industrial motor controls.

Pinout & Package

Package: SIP-3 (Bulk Pack) - straight-lead, through-hole mounting with 14.5mm body length and 3.0mm width; RoHS-compliant, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power input with reverse-blocking diode and 28V Zener clamp - tolerates transient reverse polarity and overvoltage spikes.
2	GND	Ground reference for internal regulator and output stage - must be low-impedance for stable chopper operation.
3	OUTPUT	Open-drain output with internal pull-up and 28V Zener clamp - sinks current when South pole applied to part-marking side; logic-low active.

Key Features

Feature	Design Value
Unipolar South-pole activation	Eliminates false triggering from North fields or stray ambient fields in multi-sensor layouts.
Chopper-stabilized architecture	Reduces thermal drift of BOP/BRP to ±15G over –40°C to +125°C - critical for precision level detection.
Integrated 10–18 kΩ pull-up	Simplifies BOM and layout by removing external resistor; compatible with 3.3V/5V/24V logic interfaces.
Zener clamps on VDD and OUTPUT	Enables direct use in 24V systems without external TVS - withstands 32V transients per absolute max rating.
800kHz chopping frequency	Rejects low-frequency EMI (e.g., 50/60Hz mains noise) while maintaining sub-4µs response time.

Applications

Industrial Flow Meter

Appliance Lid Detection

Use Scenario: Detecting rotation of turbine blades in water/gas meter housings using embedded magnet.

IC Role / Device Role / Timing Role: Unipolar latch providing clean, chatter-free pulse output synchronized to blade passage.

Use Value: 20G hysteresis prevents double-counting at low flow rates; 28V tolerance allows direct 24V supply integration.

Use Scenario: Monitoring open/closed state of washing machine or dishwasher door.

IC Role / Device Role / Timing Role: Contactless position sensor latching on magnet presence during closure.

Use Value: Internal pull-up eliminates external components; –40°C to +125°C range covers condensation and heating cycles.

Motorized Furniture Actuator

Smart Toiletry Device

Use Scenario: End-of-travel detection in electric recliner or adjustable bed linear actuators.

IC Role / Device Role / Timing Role: Proximity switch confirming mechanical stop position before motor shutdown.

Use Value: 55G sensitivity enables use of small, low-cost magnets; Zener clamps protect against back-EMF spikes.

Use Scenario: Detecting brush head attachment/detachment in sonic toothbrushes or hair dryers.

IC Role / Device Role / Timing Role: Low-power Hall latch signaling accessory presence to MCU via open-drain interrupt.

Use Value: 3mA typical supply current extends battery life; 6kV HBM ESD withstands repeated handling in consumer environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall effect latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AH3381-P-B	Lower sensitivity: BOP/BRP = +70G/+50G typical - requires stronger magnet or smaller air gap.	Less suitable for compact designs with space-constrained magnet placement.	Select when higher magnetic immunity is needed in high-interference environments.
AL3382W-7	SC59 package; South-pole activation on non-marking side - opposite polarity orientation vs. SIP-3.	Requires mechanical redesign of magnet placement relative to PCB marking side.	Choose for surface-mount assembly where SIP-3 bulk packaging is incompatible with production line.

Compared with AH3381-P-B and AL3382W-7, AH3382-P-B offers optimal balance of sensitivity, polarity consistency for through-hole integration, and built-in protection - making it preferred for cost-sensitive, high-volume appliance designs requiring minimal external components.

Availability

AH3382-P-B is available at Aetrix Electronics and suitable for industrial flow meters, appliance lid detection, motorized furniture actuators, and smart personal care devices requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3382-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and sensing solutions for industrial and consumer markets.

AH3382 belongs to Diodes' Hall Effect Sensor product line, engineered specifically for robust, low-maintenance proximity and position sensing in harsh environments - emphasizing magnetic sensitivity, wide supply range, and integrated protection.

FAQ

What is the correct magnet orientation for AH3382-P-B activation?

For AH3382-P-B (SIP-3 Bulk Pack), the South pole must be presented to the part-marking side of the package. This is confirmed in the datasheet's magnetic polarity diagram and differs from SC59 variants, which require South pole on the non-marking side. Incorrect orientation results in no output switching.

Does AH3382-P-B require an external pull-up resistor?

No. AH3382-P-B integrates a 10–18 kΩ pull-up resistor on the OUTPUT pin, eliminating the need for external components in standard 3.3V/5V/24V logic interfacing. The internal resistor is temperature-compensated and rated for continuous operation across –40°C to +125°C.

Can AH3382-P-B be used in 24V industrial control systems?

Yes. AH3382-P-B is rated for 3.0V to 28V operation and includes a 28V Zener clamp on both VDD and OUTPUT pins. Its absolute maximum supply voltage is 32V, and it features reverse-blocking diode protection - making it suitable for direct connection to 24V PLC I/O and motor control rails without external protection.

How does chopper stabilization improve performance in AH3382-P-B?

Chopper stabilization in AH3382-P-B cancels offset voltage drift caused by temperature and stress, reducing BOP/BRP variation to ±15G over –40°C to +125°C. It also enables 800kHz modulation that rejects low-frequency EMI, resulting in stable switching even near AC motors or transformers without added filtering.

AH3382-P-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP

Packaging:: Bulk

Product Status:: Obsolete

Function:: Unipolar Switch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 5.5mT Trip, 3.5mT Release

Test Condition:: -40°C ~ 125°C

Voltage - Supply:: 3V ~ 28V

Current - Supply (Max):: 4mA

Current - Output (Max):: 55mA

Output Type:: Open Drain

Features:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH3382-P-B FAQ

1.How can I place an order for AH3382-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3382-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 AH3382-P-B reliable?

The price and inventory of AH3382-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 AH3382-P-B is usually 5 days.

3.What payment methods are accepted for AH3382-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3382-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3382-P-B?

AH3382-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3382-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 AH3382-P-B?

For technical support, including AH3382-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3382-P-B requirements.

6.How does Aetrix verify that AH3382-P-B is sourced from the original manufacturer or authorized distributors?

All AH3382-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 AH3382-P-B meets industry standards.

7.What is the process for return or replacement of AH3382-P-B?

All AH3382-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3382-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 AH3382-P-B part is unused and in its original packaging.

Return procedure for AH3382-P-B:

1.Submit a request within 90 days.

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

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