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Diodes Incorporated AH3241Q-W-7
- Part No.:
- AH3241Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3241Q-W-7.pdf
- Description:
- MAG SWITCH UNIPOLAR SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,099
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Product details
Overview
AH3241Q-W-7 from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, designed for position and proximity sensing in safety-critical systems. It operates from 2.7V to 27V, features inverted output polarity, BOP = 65–120 G (typ. 90 G) at +25°C, BRP = 45–100 G (typ. 70 G), and delivers IOFF = 5–6.9 mA and ION = 12–17 mA across -40°C to +150°C ambient.
For engineers reviewing the AH3241Q-W-7 datasheet, AH3241Q-W-7 pinout, AH3241Q-W-7 application, or AH3241Q-W-7 equivalent, this device supports high-reliability automotive sensing where magnetic threshold stability, reverse polarity protection, thermal shutdown with auto-restart, and ISO 26262 readiness are required - especially in seatbelt buckle detection and door/trunk closure monitoring.
Technical Context
The AH3241Q-W-7 implements a chopper-stabilized architecture with dynamic offset cancellation and an internal bandgap regulator to deliver temperature-compensated operation over -40°C to +150°C. Its unipolar switching behavior responds exclusively to south-pole magnetic fields exceeding BOP, holding the output state until flux falls below BRP.
It integrates battery reverse polarity protection via an internal blocking diode with zener clamp, UVLO (2.2–2.7 V), overtemperature shutdown at TJ = 190°C with release at 180°C, and ESD robustness of 8 kV HBM / 1 kV CDM - all within a single-chip SC59 (Type A1) package rated for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - enables direct connection to automotive battery rails without external regulation. |
| Operating Temperature | -40°C to +150°C - supports under-hood and cabin-mounted applications per AEC-Q100 Grade 0. |
| BOP / BRP (25°C) | 90 G / 70 G - defines magnetic sensitivity window for reliable unipolar actuation in mechanical gap variations. |
| IOFF / ION | 6 mA / 14.5 mA - determines load resistor sizing and power budget in two-wire current-loop configurations. |
| Response Delay | 7 μs - ensures fast detection of rapid mechanical motion such as seatbelt latch engagement. |
| Power-On Delay | 28–40 μs - guarantees stable magnetic sampling after supply ramp-up, critical for deterministic startup behavior. |
| ESD Rating | HBM 8 kV, CDM 1 kV - meets stringent automotive assembly and handling requirements without external protection. |
Pinout & Package
Package: SC59 (Type A1), surface-mount, 3-pin single-ended package with exposed thermal pad (RθJA = 268°C/W on 50 mm × 50 mm 2 oz PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VDD | Supply voltage input | Accepts 2.7–27 V; includes internal UVLO, reverse-blocking diode, and zener clamp for fault tolerance. |
| 2. NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating - no electrical function or signal path. |
| 3. GND | Ground reference | Return path for supply current and internal circuit biasing; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Inverted unipolar output | Output current turns ON when south pole exceeds BOP and OFF when flux drops below BRP - simplifies interface with pull-up loads in two-wire systems. |
| Integrated self-diagnostics | Safe-mode supply current (ISAFE = 0.5–1.5 mA) indicates internal fault condition - enables ASIL-B compatible system-level error reporting. |
| Chopper-stabilized architecture | Eliminates offset drift; achieves ±3.3 μs output jitter and minimal BOP/BRP temperature coefficient (0 ppm/°C) - ensures consistent switching across temperature. |
| Thermal protection with auto-restart | Shuts down at TJ = 190°C and resumes operation once TJ falls to 180°C - prevents permanent damage during transient overheating without manual reset. |
| Two-wire current-loop interface | Eliminates separate output line; uses supply current modulation (ION/IOFF) for signal transmission - reduces wiring harness cost and connector pins. |
Applications
| Seatbelt Buckle Detection | Door/Trunk Closure Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using a magnet embedded in the tongue and sensor mounted in the receptacle. IC Role / Device Role / Timing Role: Unipolar Hall switch providing current-loop ON/OFF state to ECU via shared VDD/GND pair. Use Value: Eliminates mechanical switches prone to wear; enables fail-safe diagnostics via ISAFE current signature during buckle misalignment or sensor fault. |
Use Scenario: Monitor door or trunk lid position in vehicle body control modules (BCM) to enable automatic lighting, alarm triggering, or power window lockout. IC Role / Device Role / Timing Role: Two-wire magnetic proximity detector generating modulated supply current indicating open/closed state. Use Value: Reduces wiring complexity vs. three-wire solutions; thermal shutdown prevents latch-up during prolonged exposure to hot chassis surfaces. |
| Seat Position Monitoring | Wiper Arm End-of-Travel Detection |
|
Use Scenario: Track fore/aft or recline position of automotive seats using multiple magnets and fixed Hall sensors along linear or rotary travel paths. IC Role / Device Role / Timing Role: Unipolar switch detecting discrete magnet positions to report seat segment occupancy or range limits. Use Value: Enables adaptive airbag deployment logic and memory seat recall; BOP/BRP hysteresis prevents chatter during slow mechanical movement. |
Use Scenario: Identify wiper blade home position at park location using a magnet on the linkage and sensor mounted near motor housing. IC Role / Device Role / Timing Role: High-speed magnetic edge detector with 7 μs response time synchronizing wiper motor commutation. Use Value: Ensures precise park alignment; wide 2.7–27 V operation accommodates battery voltage sag during cold cranking without dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3241Q-W-7 | Same pinout and package; identical BOP/BRP specs but lacks integrated self-diagnostics and ISO 26262 readiness. | Suitable for non-safety-critical interior sensing where diagnostic coverage is not mandated. | Select only if functional safety compliance is not required and cost optimization is prioritized. |
| TLE4913-2SA | Three-wire interface (separate VDD, GND, OUT); higher BOP (120 G min) but no built-in reverse polarity protection. | Requires external protection circuitry and additional wiring; better suited for high-noise engine bay environments. | Choose when precise voltage-output signaling is needed and board space allows for discrete protection components. |
Compared with AL3241Q-W-7, AH3241Q-W-7 adds mandatory diagnostic capability and automotive functional safety readiness; versus TLE4913-2SA, it trades wire count for integration and robustness - making it optimal for cost-sensitive, two-wire AEC-Q100 systems requiring built-in fault detection.
Availability
AH3241Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, door/trunk closure monitoring, and seat position sensing requiring stable component supply across automotive production lifecycles.
Supply support for AH3241Q-W-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 analog ICs, specializing in high-reliability automotive, industrial, and power management solutions.
AH3241Q-W-7 belongs to the AH32xxQ automotive Hall-effect switch family, engineered specifically for two-wire position and proximity sensing in AEC-Q100-compliant systems with integrated diagnostics and thermal resilience.
FAQ
What is the magnetic polarity requirement for AH3241Q-W-7 activation?
The AH3241Q-W-7 is a south-pole-activated unipolar switch: it turns ON only when a south magnetic pole exceeds its BOP threshold (65–120 G). North pole exposure has no effect. This behavior is confirmed in the magnetic characteristics table and functional block diagram, and applies across the full -40°C to +150°C operating range.
Can AH3241Q-W-7 be used in high-vibration environments like powertrain mounting?
Yes - AH3241Q-W-7 is qualified to AEC-Q100 Grade 0 (-40°C to +150°C) and packaged in SC59 (Type A1), which features robust leadframe construction and thermal performance (RθJA = 268°C/W). Its chopper-stabilized design minimizes mechanical stress-induced offset drift, and the integrated thermal shutdown protects against sustained vibration-induced heating.
Does AH3241Q-W-7 require an external decoupling capacitor?
Yes - a minimum 100 nF ceramic capacitor (CIN) must be placed between VDD and GND, located as close as possible to the IC pins. This is explicitly required in the datasheet (Note 4) to stabilize supply voltage and strengthen noise immunity, especially in automotive electrical environments with load dump transients and alternator ripple.
Is AH3241Q-W-7 compliant with RoHS and halogen-free standards?
Yes - AH3241Q-W-7 is fully RoHS 3 compliant (2015/863/EU), totally lead-free, and halogen- and antimony-free ("Green" device), containing <900 ppm bromine, <900 ppm chlorine (<1500 ppm total Br + Cl), and <1000 ppm antimony compounds, as verified per Diodes Incorporated's product definitions and test reports.
AH3241Q-W-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:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 9mT Trip, 7mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- Switch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3241Q-W-7 FAQ
1.How can I place an order for AH3241Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3241Q-W-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 AH3241Q-W-7 reliable?
The price and inventory of AH3241Q-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3241Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3241Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3241Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3241Q-W-7?
AH3241Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3241Q-W-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 AH3241Q-W-7?
For technical support, including AH3241Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3241Q-W-7 requirements.
6.How does Aetrix verify that AH3241Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3241Q-W-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 AH3241Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3241Q-W-7?
All AH3241Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3241Q-W-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 AH3241Q-W-7 part is unused and in its original packaging.
Return procedure for AH3241Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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