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Diodes Incorporated AH175-WG-7-A
- Part No.:
- AH175-WG-7-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH175-WG-7-A.pdf
- Description:
- MAGNETIC SWITCH LATCH SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AH175-WG-7-A from Diodes Incorporated is a bipolar Hall-effect latch sensor in SC59 (SOT23) package, designed for high-temperature rotor position sensing and RPM detection in automotive and industrial motor control. It operates from 3.5V to 20V, delivers 25mA sink current, features ±15–60 Gauss operate/release points (A-grade), and supports –40°C to +150°C ambient operation with built-in reverse-polarity protection.
For engineers reviewing the AH175-WG-7-A datasheet, AH175-WG-7-A pinout, AH175-WG-7-A application, or AH175-WG-7-A equivalent, key selection criteria include magnetic hysteresis (≥30 Gauss), open-collector output compatibility with 3.3V/5V/12V logic interfaces, thermal derating in SC59 (230 mW at 25°C), and AEC-Q100 suitability via manufacturer qualification path.
Technical Context
The AH175 integrates a Hall voltage generator, differential amplifier, Schmitt-trigger comparator with hysteresis, and open-collector pre-driver stage-all powered by an internal band-gap regulator enabling stable operation across its 3.5–20V supply range. Its bipolar latching behavior requires magnetic polarity reversal (South-to-brand-side Bop >15G, Brp <–15G) to toggle output state.
Thermal performance is package-dependent: SC59 limits power dissipation to 230 mW at 25°C, derating linearly to 0 mW at 150°C. Output saturation voltage remains ≤400 mV at 10mA sink, ensuring reliable low-side switching into typical pull-up loads (e.g., 1kΩ to 12V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5V to 20V DC - supports direct connection to automotive battery rails without external regulation |
| Output Type | Open-collector pre-driver - enables flexible pull-up voltage selection (e.g., 3.3V, 5V, 12V) and wired-OR interfacing |
| Sink Current | 25mA max - drives standard logic inputs or small relays directly without external buffer |
| Magnetic Hysteresis | 30–120 Gauss (A-grade) - prevents chatter in noisy electromagnetic environments near motors or solenoids |
| Operating Temp | –40°C to +150°C - qualified for under-hood automotive and high-temp industrial motor control locations |
| Output Saturation | ≤400 mV at 10mA - ensures <0.4V drop when sinking load, minimizing power loss and heat generation |
| Reverse Polarity Protection | Built-in - eliminates need for external series diode in battery-connected applications |
Pinout & Package
SC59 package (commonly known as SOT23 in Asia), 3-pin surface-mount, 2.8mm × 2.9mm footprint, 1.1mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive supply input | Accepts 3.5–20V; powers internal regulator, amplifier, and comparator stages |
| GND (Pin 2) | Ground reference | Common return for supply and output stage; must be low-impedance for noise immunity |
| OUT (Pin 3) | Open-collector digital output | Sinks up to 25mA; requires external pull-up; asserts low when B > Bop (South pole applied) |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Requires magnetic polarity reversal to switch states - eliminates false triggering from unidirectional field drift |
| Wide supply range (3.5–20V) | Eliminates need for external LDO in 12V automotive or 24V industrial systems |
| Integrated reverse-voltage protection | Withstands –20V on Vcc - prevents damage during battery jump-start or wiring reversal |
| High-temperature capability (–40°C to +150°C) | Validated for continuous operation in engine bay or motor housing environments |
| Green, halogen-free construction | <900ppm Br, <900ppm Cl, <1000ppm Sb - meets global environmental compliance mandates |
Applications
| Brushless DC Motor Rotor Sensing | Automotive Fan Speed Monitoring |
|---|---|
|
Use Scenario: Detecting rotor magnet polarity in 3-phase BLDC motors for commutation timing. IC Role / Device Role / Timing Role: Digital Hall latch providing edge-aligned, hysteresis-stabilized position signals to motor driver IC. Use Value: Enables precise 6-step commutation with <1° electrical angle jitter due to 30–120G hysteresis and <400mV saturation. |
Use Scenario: Measuring fan blade passage frequency in HVAC blower assemblies. IC Role / Device Role / Timing Role: Magnetic RPM sensor converting rotational speed into TTL-compatible pulse train. Use Value: Delivers clean, bounce-free pulses up to 20kHz with 25mA sink drive into MCU GPIO or counter input. |
| Industrial Conveyor Belt Position | Electric Power Steering (EPS) Angle Feedback |
|
Use Scenario: Monitoring gear tooth or magnet presence on conveyor shafts for motion verification. IC Role / Device Role / Timing Role: Proximity latch confirming mechanical actuation in safety-critical material handling systems. Use Value: Operates reliably at 150°C ambient with reverse-polarity protection-reducing field failure risk in dusty, high-vibration zones. |
Use Scenario: Sensing steering column rotation via embedded ring magnet for assist torque calculation. IC Role / Device Role / Timing Role: Redundant position latch in dual-sensor EPS architectures meeting ASIL-B requirements. Use Value: Supports AEC-Q100 qualification path and IATF 16949 manufacturing-enabling functional safety integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3724-WG-7-A | Higher sensitivity (Bop: 5–35G), lower VCC min (2.5V), same SC59 package and –40°C to +150°C rating | Enables detection of weaker fields (e.g., smaller magnets or larger air gaps); optimized for low-voltage microcontroller interfaces | Select when upgrading legacy AH175 designs requiring improved signal margin or 2.5V system compatibility |
| US1881LUA-AB3-B | Unipolar latch (Bop only, no Brp), 3–24V supply, 20mA sink, TO-92 package - not pin-compatible | Lacks bipolar reset; suited for simple proximity detection where polarity reversal isn't available | Choose only for cost-sensitive, non-automotive applications where unipolar behavior suffices and TO-92 mounting is acceptable |
Compared with AH175-WG-7-A, AH3724-WG-7-A offers enhanced magnetic sensitivity and lower voltage operation while maintaining full thermal and package compatibility; US1881LUA-AB3-B trades bipolar functionality and surface-mount fit for lower unit cost in less demanding environments.
Availability
AH175-WG-7-A is available at Aetrix Electronics and suitable for brushless DC motor control, automotive fan speed monitoring, and industrial conveyor belt position sensing requiring stable component supply through extended product lifecycles.
Supply support for AH175-WG-7-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 devices, with design, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
The AH175 belongs to Diodes' Hall-effect sensor product line, engineered specifically for high-reliability, high-temperature position and speed sensing in automotive powertrain, chassis, and industrial motor systems.
FAQ
What is the magnetic polarity requirement for AH175-WG-7-A operation?
The AH175-WG-7-A is a bipolar latch: it turns ON when a South pole exceeds the operate point (Bop ≥15G, A-grade), and remains ON until a South pole falls below the release point (Brp ≤–15G). North pole exposure alone does not reset the output - polarity reversal is mandatory.
Can AH175-WG-7-A interface directly with a 3.3V microcontroller GPIO?
Yes - its open-collector output allows use with any pull-up voltage. Connect a 3.3V pull-up resistor (e.g., 10kΩ) to OUT; the device sinks current when active, pulling the node to ≤400mV, which is solidly recognized as logic LOW by 3.3V CMOS inputs.
Is AH175-WG-7-A qualified to AEC-Q100?
The AH175-WG-7-A itself is not individually AEC-Q100-certified, but Diodes Incorporated offers AEC-Q100-qualified versions (e.g., AH175-PG-A-A/B) in SIP-3 packages manufactured in IATF 16949-certified facilities. Customers requiring automotive qualification should contact Diodes for PPAP-capable variants.
Why is AH175 marked "Not Recommended for New Designs"?
Diodes has designated AH175 as NRND because the AH3724 offers superior magnetic sensitivity, lower minimum supply voltage (2.5V vs. 3.5V), and enhanced temperature stability - making it the preferred choice for new motor control and automotive designs while maintaining SC59 compatibility and thermal specs.
AH175-WG-7-A 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:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 6mT Trip, -6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3.5V ~ 20V
- Current - Supply (Max):
- 6mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH175-WG-7-A FAQ
1.How can I place an order for AH175-WG-7-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH175-WG-7-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 AH175-WG-7-A reliable?
The price and inventory of AH175-WG-7-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH175-WG-7-A is usually 5 days.
3.What payment methods are accepted for AH175-WG-7-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH175-WG-7-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH175-WG-7-A?
AH175-WG-7-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH175-WG-7-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 AH175-WG-7-A?
For technical support, including AH175-WG-7-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH175-WG-7-A requirements.
6.How does Aetrix verify that AH175-WG-7-A is sourced from the original manufacturer or authorized distributors?
All AH175-WG-7-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 AH175-WG-7-A meets industry standards.
7.What is the process for return or replacement of AH175-WG-7-A?
All AH175-WG-7-A units undergo pre-shipment inspection (PSI). If there is an issue with AH175-WG-7-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 AH175-WG-7-A part is unused and in its original packaging.
Return procedure for AH175-WG-7-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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