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Diodes Incorporated AH3326-SA-7
- Part No.:
- AH3326-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3326-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,414
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Product details
Overview
AH3326-SA-7 from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect unipolar switch IC in SOT23 (Type S) package, designed for proximity and position sensing in home appliances and industrial systems. It operates from 3.0V to 28V, features BOP = 100 G (typ), BRP = 85 G (typ), open-drain output with 60 mA continuous current rating, and functions across –40°C to +125°C.
For engineers reviewing the AH3326-SA-7 datasheet, AH3326-SA-7 pinout, AH3326-SA-7 application, or AH3326-SA-7 equivalent, key selection criteria include magnetic operate/release points, supply voltage range compatibility, open-drain pull-up requirements, thermal derating in SOT23, and polarity-dependent mounting orientation (South pole to part marking side).
Technical Context
The AH3326-SA-7 uses chopper-stabilized architecture with dynamic offset cancellation to achieve minimal switch-point drift over temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for analog circuitry, enabling stable operation across –40°C to +125°C ambient.
It integrates reverse-blocking diode and zener clamps on both VDD and OUTPUT pins for robustness against supply transients and ESD events up to 8 kV HBM. The single open-drain output switches low when perpendicular magnetic flux exceeds BOP (100 G typ), latching until flux falls below BRP (85 G typ), with 15 G typical hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 28 V - supports direct connection to 12 V/24 V industrial rails without external regulation |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and motor-control environments |
| BOP / BRP (Typ) | 100 G / 85 G - high sensitivity enables detection with small or distant magnets |
| Output Type | Open-drain, 60 mA continuous - requires external pull-up; compatible with 3.3 V/5 V/24 V logic interfaces |
| VOUT_ON (IOUT = 20 mA) | 0.2 V (typ) - low saturation voltage minimizes power loss and ensures clean logic-low signaling |
| ESD Rating (HBM) | 8 kV - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Startup Time | 10 µs (typ) - fast enable after power-on enables real-time motion detection in high-speed applications |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, 2.9 mm × 2.4 mm × 1.0 mm body, gull-wing leads, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - accepts 3.0 V to 28 V; includes reverse-blocking diode and zener clamp |
| 2 | GND | Ground reference - must be connected directly to low-impedance system ground plane |
| 3 | OUTPUT | Open-drain output - sinks up to 60 mA; requires external pull-up resistor (RL); clamped to 28 V |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to ±5 G over full temperature range, enabling stable switching in varying ambient conditions |
| Unipolar South-pole activation | Switches on only with South pole applied to part-marking side - eliminates false triggers from stray North fields |
| Zener clamps on VDD & OUTPUT | Clamp transients to ≤28 V on supply and ≤28 V on output - protects against load-dump and inductive kickback |
| Reverse supply protection | Withstands –18 V reverse voltage at VDD - prevents damage during board-level polarity reversals or miswiring |
| RF noise immunity | Validated against 100 MHz–1 GHz RF fields per IEC 61000-4-3 - maintains reliable operation near motors and wireless modules |
Applications
| Washing Machine Lid Detection | Industrial Conveyor Position Sensing |
|---|---|
|
Use Scenario: Detect lid closure in top-load washing machines using a magnet embedded in the lid and AH3326-SA-7 mounted on the main chassis. IC Role / Device Role / Timing Role: Unipolar Hall switch providing logic-level open-drain signal indicating mechanical state transition (open/closed). Use Value: High BOP/BRP margin (100 G / 85 G) tolerates magnet misalignment and gap variation; 28 V rating allows direct interface with 24 V control bus. |
Use Scenario: Monitor gear tooth presence on rotating shafts in packaging line conveyors to verify motion and count cycles. IC Role / Device Role / Timing Role: Proximity sensor converting magnetic field changes into timed digital pulses for PLC input. Use Value: 10 µs startup time and 4 µs response delay support >10 kHz pulse rates; chopper stabilization ensures consistent timing across temperature swings. |
| Smart Thermostat Fan Guard Detection | Power Tool Motor Brake Activation |
|
Use Scenario: Confirm physical insertion of fan guard before allowing HVAC blower operation in smart thermostats. IC Role / Device Role / Timing Role: Safety interlock switch asserting low signal only when guard is correctly seated and magnet aligned. Use Value: 8 kV HBM ESD rating withstands handling during assembly; –40°C to +125°C range covers cold storage and hot enclosure environments. |
Use Scenario: Trigger electronic brake circuit when power tool trigger is released, using magnet on moving armature and AH3326-SA-7 on stator housing. IC Role / Device Role / Timing Role: Fast-acting position detector initiating MOSFET gate drive for regenerative braking. Use Value: Low VOUT_ON (0.2 V typ) minimizes heat in brake driver stage; 28 V tolerant output interfaces directly with 24 V brake coil drivers. |
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 |
|---|---|---|---|
| AL3326EUST-7 | Same BOP/BRP specs (100 G / 85 G), but in SOT23-3L with different pinout (VDD/GND/OUT vs. VDD/OUT/GND) and no reverse-blocking diode | Lacks integrated reverse-supply protection - requires external diode in 24 V systems with risk of polarity reversal | Select if footprint compatibility with AL33xx series is required and board-level reverse protection is already implemented |
| US1881EUA-7 | Lower sensitivity (BOP = 35 G typ), wider hysteresis (25 G), same SOT23-3 package and 3–24 V range | Requires stronger or closer magnet placement; less suitable for low-field or large-air-gap designs | Choose for cost-sensitive applications where magnet strength is guaranteed and thermal stability is secondary |
Compared with AL3326EUST-7 and US1881EUA-7, the AH3326-SA-7 uniquely combines high magnetic sensitivity, integrated reverse-supply protection, and industry-leading 8 kV ESD rating in a standard SOT23 footprint-making it optimal for ruggedized consumer and industrial proximity sensing where reliability and field robustness are critical.
Availability
AH3326-SA-7 is available at Aetrix Electronics and suitable for washing machine safety interlocks, industrial conveyor position monitoring, smart thermostat guard detection, and power tool brake activation requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3326-SA-7 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 ICs, specializing in high-reliability signal integrity, power management, and sensing solutions for industrial, automotive, and consumer markets.
The AH332X family targets high-voltage Hall sensing in harsh environments, with design emphasis on wide supply range, thermal stability, and integrated protection - specifically for contactless switching in home appliances and factory automation.
FAQ
What is the correct magnet orientation for AH3326-SA-7 activation?
The AH3326-SA-7 in SOT23 (Type S) package requires the South pole to 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 switching action.
Does AH3326-SA-7 require an external bypass capacitor?
Yes - a 10 nF to 100 nF ceramic capacitor (CIN) between VDD and GND is recommended per the datasheet to stabilize the internal regulator and improve RF noise immunity. Omitting CIN may cause erratic switching or increased susceptibility to conducted EMI in noisy 24 V systems.
Can AH3326-SA-7 drive a relay directly?
No - its 60 mA continuous output current is insufficient for most relay coils. It must drive a transistor or MOSFET buffer stage. The open-drain output is intended for logic-level signaling or low-power loads; exceeding 60 mA risks thermal shutdown or permanent damage.
Is AH3326-SA-7 compliant with automotive AEC-Q200?
No - AH3326-SA-7 is not AEC-Q200 qualified. The automotive-grade variant is AH3326Q, documented separately under DS46151Q. AH3326-SA-7 is rated for industrial and consumer applications with operating temperature up to +125°C but lacks stress-test validation for automotive qualification.
AH3326-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3326-SA-7 FAQ
1.How can I place an order for AH3326-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3326-SA-7 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-SA-7 reliable?
The price and inventory of AH3326-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3326-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3326-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3326-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3326-SA-7?
AH3326-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3326-SA-7 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-SA-7?
For technical support, including AH3326-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3326-SA-7 requirements.
6.How does Aetrix verify that AH3326-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3326-SA-7 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-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3326-SA-7?
All AH3326-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3326-SA-7, 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-SA-7 part is unused and in its original packaging.
Return procedure for AH3326-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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