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Diodes Incorporated AH3326-P-A
- Part No.:
- AH3326-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3326-P-A.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
AH3326-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect unipolar switch IC designed for position and proximity sensing in industrial home appliances and personal care devices. It operates from 3.0V to 28V, features BOP = 65–135 G and BRP = 50–120 G (typical 100 G / 85 G), delivers open-drain output with 60 mA continuous current capability, and supports operation from −40°C to +125°C in SIP-3 (Ammo Pack) package.
For engineers reviewing the AH3326-P-A datasheet, AH3326-P-A pinout, AH3326-P-A application, or AH3326-P-A equivalent, key selection criteria include magnetic operate/release thresholds, supply voltage range compatibility, open-drain drive strength, thermal derating in SIP-3 packaging, and polarity-dependent mounting orientation for South-pole actuation.
Technical Context
The AH3326-P-A uses chopper-stabilized architecture with dynamic offset cancellation to suppress temperature-induced drift and mechanical stress effects on switching points. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring stable BOP/BRP across −40°C to +125°C.
Magnetic actuation requires South pole orientation relative to package marking side (SIP-3 Ammo Pack), with hysteresis of 8–25 G enabling noise-immune level detection. The single open-drain output includes overcurrent limiting (30–55 mA), zener clamping (28 V), and reverse-blocking protection on VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 28 V - enables direct interface with 5 V, 12 V, and 24 V industrial control rails without external regulation. |
| Operate Point (BOP) | 65–135 G (typ. 100 G) - high sensitivity allows detection with small or low-strength magnets at increased air gaps. |
| Release Point (BRP) | 50–120 G (typ. 85 G) - ensures clean hysteresis margin (min. 8 G) for reliable bounce-free switching in noisy environments. |
| Output Type | Open-drain N-channel - supports flexible pull-up to any voltage ≤32 V and enables wired-OR logic or multi-sensor bus configurations. |
| Output On Voltage | ≤0.4 V at 20 mA - guarantees low power dissipation and strong logic-low assertion even under full load. |
| ESD Rating | 8 kV HBM - provides robust handling during PCB assembly and field service without additional protection circuitry. |
| Operating Temperature | −40°C to +125°C - validated for use in sealed motor housings, washing machine drums, and heated appliance enclosures. |
Pinout & Package
SIP-3 (Ammo Pack) package: 3-pin surface-mount package with gull-wing leads, 2.7 mm × 2.3 mm body, 1.3 mm pitch, and part marking on top surface. Mounting orientation requires South pole applied to marked side for activation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and zener clamp - tolerates −18 V reverse supply and transient overvoltage up to 32 V. |
| 2 | GND | Ground reference for internal regulator and output stage - must be low-impedance connection to minimize noise coupling into Hall sensor. |
| 3 | OUTPUT | Open-drain output with 60 mA continuous rating and internal current limit - requires external pull-up resistor (RL) for logic-level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to <±0.5 G/°C and eliminates mechanical stress-induced offset shift in plastic-packaged sensors. |
| Integrated zener clamps | 28 V clamp on VDD and OUTPUT pins - eliminates need for external TVS diodes in 24 V system interfaces. |
| High ESD immunity | 8 kV HBM rating - meets IEC 61000-4-2 Level 4 for front-panel switches and user-accessible proximity sensors. |
| Wide voltage operation | 3.0 V to 28 V supply range - supports battery-powered (3.3 V MCU) and line-powered (24 V PLC) applications with same BOM item. |
| Polarity-specific actuation | South-pole-only activation on marked side for SIP-3 - prevents false triggers from stray North-pole fields in multi-magnet assemblies. |
Applications
| Washing Machine Lid Detection | Cordless Hair Dryer Airflow Sensing |
|---|---|
|
Use Scenario: Detect lid closure before drum rotation begins to prevent injury and water leakage. IC Role / Device Role / Timing Role: Unipolar Hall switch providing safety-critical interlock signal to main controller. Use Value: 100 G BOP enables reliable detection through 3 mm plastic housing using low-cost ferrite magnet; SIP-3 footprint simplifies automated placement on compact control board. |
Use Scenario: Monitor fan rotation and airflow presence to enable heating element only when air is moving. IC Role / Device Role / Timing Role: Proximity sensor verifying impeller position and rotational status via magnet-on-blade detection. Use Value: 85 G BRP ensures stable hold-off during brief airflow interruptions; −40°C to +125°C rating accommodates internal heat buildup near heating coil. |
| Smart Coffee Maker Water Level | Industrial Conveyor Belt Position |
|
Use Scenario: Detect float magnet position inside sealed water reservoir to trigger refill alerts and prevent dry-heating. IC Role / Device Role / Timing Role: Level-sensing switch interfacing directly with 3.3 V microcontroller GPIO. Use Value: 3.0 V minimum supply allows direct connection to MCU's LDO output; 0.4 V VOL at 20 mA ensures clean logic-low under worst-case pull-up conditions. |
Use Scenario: Confirm presence of metal part carriers at loading/unloading stations using fixed magnet + moving ferrous target. IC Role / Device Role / Timing Role: Robust position verifier in dusty, vibration-prone factory environment. Use Value: 28 V absolute max rating withstands 24 V rail transients; 8 kV ESD protects against static discharge from conveyor belts and operator contact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3212LLHLT-T | BOP = 20–40 G (lower sensitivity); SC59 package only; no reverse-blocking diode on VDD. | Requires stronger magnet or smaller air gap; needs external reverse-protection diode in 24 V systems. | Select when lower trip point is needed and SIP-3 packaging is not required. |
| Melexis US1881EUA-ABA-002-REEL | BOP = 30–60 G; built-in Schmitt trigger; 3.5–24 V range; SOIC-8 package. | Higher pin count and larger footprint; narrower voltage range excludes 28 V industrial rails. | Prefer for designs requiring tighter hysteresis control and compatibility with legacy SOIC layouts. |
Compared with A3212LLHLT-T and US1881EUA-ABA-002-REEL, AH3326-P-A offers higher magnetic sensitivity for relaxed mechanical tolerances, wider supply range for direct 24 V integration, and SIP-3 packaging optimized for high-volume consumer appliance SMT lines.
Availability
AH3326-P-A is available at Aetrix Electronics and suitable for washing machine safety interlocks, cordless personal care device airflow monitoring, and smart appliance water level detection requiring stable component supply across extended production lifecycles.
Supply support for AH3326-P-A 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 solutions for industrial, computing, consumer, and automotive markets.
AH3326-P-A belongs to the AH332X high-voltage Hall-effect switch family, engineered for robust position and proximity sensing in cost-sensitive, high-reliability home appliance and personal care applications.
FAQ
What is the correct magnet polarity and orientation for AH3326-P-A activation?
The AH3326-P-A in SIP-3 (Ammo Pack) package requires a South pole applied to the side with part marking ('3326') for activation. Applying North pole or placing South pole on the unmarked side will not trigger the output. This polarity-specific behavior is inherent to the die orientation and cannot be reversed via configuration.
Does AH3326-P-A require an external capacitor on the VDD pin?
Yes - a 10 nF to 100 nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND, placed as close as possible to the device pins. This stabilizes the internal bandgap regulator, improves RF noise immunity, and prevents false triggering during supply transients, especially in motor-driven appliance environments.
Can AH3326-P-A drive an LED directly without a series resistor?
No - the AH3326-P-A has an open-drain output rated for 60 mA continuous current, but driving an LED directly would exceed safe operating limits without current limiting. A series resistor must be used to limit current to ≤20 mA for reliable long-term operation and to maintain VOL ≤0.4 V per datasheet specifications.
Is AH3326-P-A qualified for automotive applications?
No - AH3326-P-A is specified for industrial and consumer applications. For automotive use, Diodes Incorporated offers the pin-compatible AH3326Q variant, which meets AEC-Q100 Grade 1 requirements (−40°C to +125°C) and includes additional qualification testing for vibration, humidity, and lifetime reliability under automotive conditions.
AH3326-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3326-P-A FAQ
1.How can I place an order for AH3326-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3326-P-A 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 AH3326-P-A reliable?
The price and inventory of AH3326-P-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3326-P-A is usually 5 days.
3.What payment methods are accepted for AH3326-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3326-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3326-P-A?
AH3326-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3326-P-A 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 AH3326-P-A?
For technical support, including AH3326-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3326-P-A requirements.
6.How does Aetrix verify that AH3326-P-A is sourced from the original manufacturer or authorized distributors?
All AH3326-P-A 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 AH3326-P-A meets industry standards.
7.What is the process for return or replacement of AH3326-P-A?
All AH3326-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3326-P-A, 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 AH3326-P-A part is unused and in its original packaging.
Return procedure for AH3326-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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