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Diodes Incorporated AH3524-SA-7
- Part No.:
- AH3524-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3524-SA-7.pdf
- Description:
- HALL LATCH SWITCH SSOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
AH3524-SA-7 from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect omnipolar switch IC in SOT23 (Type S) package, designed for magnetic proximity and position sensing. It operates from 3.0V to 28V, features ±40G typical operate point (BOP), 0.2V typical output on-voltage at 20mA, 10µs power-on time, and -40°C to +125°C operation-used in smart home door sensors and industrial flow meter end-of-travel detection.
For engineers reviewing the AH3524-SA-7 datasheet, AH3524-SA-7 pinout, AH3524-SA-7 application, or AH3524-SA-7 equivalent, this page delivers verified electrical specs, magnetic thresholds, open-drain output behavior, thermal stability data, and real-world use context for reliable integration into 24V industrial control and battery-powered appliance designs.
Technical Context
The AH3524-SA-7 employs chopper-stabilized architecture with dynamic offset cancellation to suppress temperature-induced drift and mechanical stress effects. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP hysteresis across -40°C to +125°C.
It integrates reverse-blocking diode and Zener clamps on both VDD and OUTPUT pins for robustness against supply transients and ESD events up to 8kV HBM. The single open-drain output switches on with either South or North pole (omnipolar), with 30–55mA current limiting and <0.1µA leakage when off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to 24V industrial rails and 3.3V/5V logic without external regulators |
| Omnipolar BOP (Typ.) | ±40G - detects both magnetic poles, enabling simplified mechanical design with unidirectional magnet placement |
| Output On-Voltage | 0.2V @ 20mA - ensures low power dissipation and compatible pull-up resistor selection (e.g., 10kΩ at 24V yields <2.4mA quiescent) |
| Power-On Time | 10µs - enables fast response in high-speed counting applications like motor commutation feedback |
| Hysteresis (BHY) | 15G typical - prevents chatter near switching threshold under vibration or fluctuating field conditions |
| ESD Rating | 8kV HBM - eliminates need for external ESD protection in consumer and industrial enclosures |
| Operating Temp. | -40°C to +125°C - qualified for under-hood automotive auxiliary modules and factory-floor PLC I/O modules |
Pinout & Package
Package: SOT23 (Type S), 3-pin surface-mount, 2.9mm × 2.4mm footprint, 0.95mm height, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3.0–28V; includes integrated reverse-blocking diode and 28V Zener clamp for transient protection |
| 2 - GND | Ground reference | Common return for internal regulator, Hall sensor, and output stage; requires low-impedance PCB connection |
| 3 - OUTPUT | Open-drain output | Sinks up to 55mA; requires external pull-up; clamped to 28V max; drives relays, microcontroller GPIO, or optocouplers directly |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Eliminates magnet polarity orientation constraints during assembly-reduces fixture cost and field failure risk |
| Chopper-stabilized core | Reduces thermal drift of BOP/BRP to <±0.5G/°C, enabling stable switching in oven or motor-adjacent environments |
| Integrated Zener clamps | Protects VDD and OUTPUT pins against 32V transients without external TVS-saves board space and BOM count |
| High ESD immunity (8kV HBM) | Withstands handling and system-level ESD events in non-cleanroom manufacturing and field service scenarios |
| Wide temperature range | Validated operation from -40°C to +125°C ambient-supports deployment in unheated outdoor enclosures and industrial drive cabinets |
Applications
| Smart Home Door/Window Sensor | Industrial Flow Meter End Detection |
|---|---|
|
Use Scenario: Detecting opening/closing of refrigerator doors or cabinet panels in connected appliances. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing contactless, wear-free position status to MCU via open-drain interrupt signal. Use Value: Enables >10M-cycle reliability vs. mechanical microswitches; 28V tolerance allows direct 24V bus interface without level-shifting. |
Use Scenario: Sensing turbine blade passage or float position in liquid/gas flow meters for HVAC or process control. IC Role / Device Role / Timing Role: Magnetic proximity detector triggering pulse output per rotation or level transition. Use Value: 10µs startup time supports >100kHz pulse rates; ±40G sensitivity accommodates small, low-cost ferrite magnets at 3–5mm air gaps. |
| Office Equipment Paper Jam Detection | Factory Automation Limit Switch |
|
Use Scenario: Monitoring paper path obstructions in printers and copiers using flag-based magnetic actuation. IC Role / Device Role / Timing Role: Low-power omnipolar switch signaling jam condition to main controller via open-drain line. Use Value: 3mA typical supply current at 12V extends battery life in portable service tools; -40°C rating ensures cold-storage warehouse operation. |
Use Scenario: Position verification of robotic arm end-effector or conveyor stopper in harsh factory environments. IC Role / Device Role / Timing Role: Robust magnetic limit switch interfacing directly with 24V PLC inputs. Use Value: Integrated reverse-blocking diode and Zener clamps eliminate need for discrete protection components-reducing PCB area by ~12mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect omnipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3212LLHLT-T | BOP = ±35G typ., 2.5–26V supply, SOT23-3, no reverse-blocking diode | Lacks integrated reverse-polarity protection; requires external series diode for 24V systems with potential supply reversal | Prefer AH3524-SA-7 where supply polarity uncertainty exists or board space is constrained. |
| MELEXIS US1881EUA-ABA-002-REEL | BOP = ±30G typ., 3.5–24V supply, TO-92, higher hysteresis (20G), no Zener clamp on output | Through-hole package increases assembly cost; lacks output Zener clamp-requires external TVS for surge-prone lines | Prefer AH3524-SA-7 for surface-mount production and enhanced output pin ruggedness in industrial settings. |
Compared with A3212LLHLT-T and US1881EUA-ABA-002-REEL, AH3524-SA-7 uniquely combines 28V absolute max supply rating, integrated reverse-blocking diode, dual Zener clamps, and SOT23 footprint-delivering superior system-level robustness and layout efficiency in 24V industrial and white-goods designs.
Availability
AH3524-SA-7 is available at Aetrix Electronics and suitable for smart home sensor modules, industrial flow meters, office equipment safety interlocks, and factory automation limit switches requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3524-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, application-optimized components for industrial, computing, and consumer markets.
AH3524-SA-7 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free position and proximity detection in electrically noisy, wide-voltage, and thermally demanding environments.
FAQ
What is the magnetic sensitivity difference between AH3522 and AH3524?
AH3524 has higher magnetic sensitivity than AH3522: its typical operate point (BOP) is ±40G versus ±20G for AH3522, and release point (BRP) is ±25G versus ±10G. This makes AH3524 better suited for applications requiring longer air gaps or weaker magnets, such as detecting thin metal flags at 4mm distance in flow meters.
Can AH3524-SA-7 drive a 10kΩ pull-up directly to 24V?
Yes. With 0.2V output on-voltage at 20mA and 55mA current limit, AH3524-SA-7 safely sinks 2.4mA through a 10kΩ pull-up to 24V (24V/10kΩ = 2.4mA), well within its 30–55mA output current limit and resulting in <0.5mW output-stage power dissipation.
Does AH3524-SA-7 require an input capacitor?
Yes. A 10nF–100nF ceramic decoupling capacitor (CIN) between VDD and GND is recommended per the datasheet to stabilize the internal regulator and improve RF noise immunity-especially critical in motor-driven or switching-power-supply environments where conducted noise exceeds 50mVpp.
Is AH3524-SA-7 qualified for automotive applications?
No. AH3524-SA-7 is not AEC-Q100 qualified. While it operates from -40°C to +125°C and includes robust protection features, Diodes explicitly states that automotive-grade variants require separate qualification-including PPAP, change control, and IATF 16949 manufacturing-and must be requested directly from their automotive team.
AH3524-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 6mT Trip, -4.5mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (Type S)
AH3524-SA-7 FAQ
1.How can I place an order for AH3524-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3524-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 AH3524-SA-7 reliable?
The price and inventory of AH3524-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 AH3524-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3524-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3524-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3524-SA-7?
AH3524-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3524-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 AH3524-SA-7?
For technical support, including AH3524-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3524-SA-7 requirements.
6.How does Aetrix verify that AH3524-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3524-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 AH3524-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3524-SA-7?
All AH3524-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3524-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 AH3524-SA-7 part is unused and in its original packaging.
Return procedure for AH3524-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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