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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH1815-P-A

Name: AH1815-P-A
Brand: Diodes Incorporated
SKU: AH1815-P-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH1815-P-A

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP, Formed Leads

Datasheet:: AH1815-P-A.pdf

Description:: MAGNETIC SWITCH OMNIPOLAR 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,176

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Product details

Overview

AH1815-P-A from Diodes Incorporated is a low-sensitivity, micropower omnipolar Hall-effect switch IC designed for magnetic tamper detection in smart meters and position sensing in battery-powered consumer and industrial equipment. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, features open-drain output with ±255–±540 Gauss operating points, and supports –40°C to +125°C operation in SIP-3 package.

For engineers reviewing the AH1815-P-A datasheet, AH1815-P-A pinout, AH1815-P-A application, or AH1815-P-A equivalent, key selection criteria include its omnidirectional magnetic activation, ultra-low power sleep/awake current profile (5–28 µA sleep, 3–12 mA awake), chopper-stabilized temperature stability, and SIP-3 leaded package compatibility with through-hole assembly and high-reliability industrial mounting.

Technical Context

The AH1815 employs dual Hall plates and chopper-stabilized architecture to cancel offset drift and ensure stable switching across temperature (–40°C to +125°C) and supply voltage (2.5V–5.5V). Its latch-free, sample-and-hold logic enables reliable on/off state capture without hysteresis dependency on field ramp rate.

It delivers true omnipolar operation: output turns on for either north or south pole exposure above B_op (±255–±540 G), and releases below B_rp (±230–±490 G), with guaranteed 40 G minimum hysteresis. The internal sleep/awake cycle (75–125 µs awake time, 75–125 ms period) minimizes average current while maintaining responsiveness.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.5V to 5.5V - Enables direct integration into 3.3V and 5V battery-backed systems without LDO overhead.
Average Supply Current	8–40 µA - Supports >10-year battery life in smart meter tamper-detection nodes powered by coin cells.
Omnipolar Switch Points	B_op: ±255–±540 G - Detects magnet presence regardless of polarity, simplifying mechanical design and assembly.
Output Type	Open-drain - Allows flexible pull-up to any rail ≤5.5V and wired-OR interfacing with microcontroller GPIO.
Operating Temperature	–40°C to +125°C - Qualified for outdoor smart meter enclosures and industrial control panels with no derating.
Hysteresis	≥40 G - Prevents chatter near threshold in noisy magnetic environments (e.g., near motors or transformers).
ESD Robustness	HBM >6 kV - Survives handling and field installation without external protection components.

Pinout & Package

Package: SIP-3 (Straight Lead, 3-pin through-hole), 4.0–4.3 mm length × 2.8–3.2 mm width × 1.4–1.6 mm height, with Hall sensor centered under marking surface.

Pin/Terminal	Circuit Role	Design Meaning
1	VDD	Power supply input - Must be decoupled with 10–100 nF capacitor to ground for RF noise immunity and stable wake-up behavior.
2	GND	Ground reference - Shared return path for Hall plates, amplifier, and output driver; requires low-impedance connection.
3	OUTPUT	Open-drain output - Sinks up to 2.5 mA; requires external 10–100 kΩ pull-up resistor to define logic-high level and slew rate.

Key Features

Feature	Design Value
Omnipolar magnetic activation	Eliminates magnet orientation constraints during assembly-reduces field calibration and fixture cost in high-volume home appliance lid switches.
Chopper-stabilized architecture	Reduces thermal drift of B_op/B_rp to <±10% over –40°C to +125°C, enabling single-point calibration in production test.
Micropower sleep mode	5–28 µA sleep current ensures sub-µA system-level standby when paired with MCU-controlled VDD gating in portable devices.
RF noise immunity	Validated against IEC 61000-4-3 (10 V/m, 80 MHz–1 GHz), allowing use in EMI-heavy environments like smart meter PCBs near PLC modems.
SIP-3 through-hole package	Provides mechanical robustness and solder-joint reliability superior to SMT alternatives in vibration-prone industrial housings and meter seals.

Applications

Smart Meter Tamper Detection

Lid/Door Position Sensing

Use Scenario: Mounted inside utility smart meter housing to detect unauthorized opening via embedded magnet on cover.

IC Role / Device Role / Timing Role: Contactless switch providing tamper event signal to meter's secure microcontroller upon cover removal.

Use Value: Enables compliance with ANSI C12.22 and DLMS/COSEM anti-tamper requirements using a single, self-contained, low-power component.

Use Scenario: Integrated into washing machine detergent drawer or refrigerator door to confirm closure before cycle start.

IC Role / Device Role / Timing Role: Proximity detector that asserts low signal when magnet on moving part aligns with sensor location.

Use Value: Replaces mechanical microswitches-eliminates wear-out failure modes and improves IPX4+ sealing integrity.

Liquid Level Detection

Display On/Off Control

Use Scenario: Used in coffee machine reservoir to detect water level via float-mounted magnet.

IC Role / Device Role / Timing Role: Magnetic level threshold detector triggering refill alert or pump disable when level drops below set point.

Use Value: Provides accurate, non-invasive level sensing unaffected by liquid conductivity, foam, or condensation-no recalibration needed after cleaning.

Use Scenario: Embedded in tablet hinge or laptop lid to enable automatic display wake/sleep on open/close motion.

IC Role / Device Role / Timing Role: Low-latency proximity switch generating interrupt-capable output to system PMIC or AP.

Use Value: Achieves <150 ms valid output response after power-on, meeting USB PD and ACPI S0ix resume timing budgets.

Equivalent & Alternatives

The following parts are listed as comparable options for similar omnipolar Hall switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Melexis US1881	Higher sensitivity (B_op ±30–±80 G); 3.3V-only supply; SOT23 package	Better for weak-field detection but unsuitable for 5V systems or high-temp industrial use (max +85°C)	Select when magnet gap is >5 mm and ambient temperature stays below 85°C.
Allegro A1120EUA-T	Unipolar (south-only) operation; wider supply range (3–24V); TO-92 package	Requires precise magnet polarity alignment; lacks chopper stabilization-higher temp drift (>±20% B_op)	Choose only if unipolar behavior is acceptable and cost-per-unit is primary constraint.

Compared with US1881 and A1120EUA-T, the AH1815-P-A uniquely balances ultra-low power, full-temperature-range stability, and polarity-agnostic operation in a mechanically robust SIP-3 package-making it optimal for sealed, long-life, field-deployed metering and appliance applications where reliability trumps raw sensitivity.

Availability

AH1815-P-A is available at Aetrix Electronics and suitable for smart meter tamper detection, industrial lid/cover sensing, and battery-powered liquid level monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for AH1815-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 communications markets.

The AH1815 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-reliability magnetic switching in safety-critical and energy-constrained applications such as utility metering and home appliance control.

FAQ

What is the maximum recommended pull-up resistor value for the AH1815-P-A open-drain output?

The datasheet specifies a recommended pull-up range of 10 kΩ to 100 kΩ. Using 100 kΩ maximizes current savings but increases rise time; 10 kΩ ensures fast edge transitions (<1 µs) for high-speed polling. For smart meter tamper detection, 47 kΩ provides optimal balance of power efficiency and noise margin.

Does the AH1815-P-A require an external bypass capacitor?

Yes-a 10 nF to 100 nF ceramic capacitor between VDD and GND is mandatory per the datasheet to stabilize the internal regulator and suppress RF noise. Omitting it causes erratic wake-up behavior and increased false-trigger rate, especially in electrically noisy environments like smart meter PCBs.

Can the AH1815-P-A operate reliably at 2.5V with full magnetic sensitivity?

Yes-its B_op and B_rp specifications are guaranteed over the full 2.5V–5.5V range. At 2.5V, typical B_op remains ±255–±540 G, and average current drops to ≤40 µA, making it ideal for coin-cell-powered devices where voltage sags below 3V during end-of-life.

Is the SIP-3 package of AH1815-P-A compatible with wave soldering processes?

Yes-the SIP-3 package is qualified for standard wave soldering per J-STD-020. Peak temperature must not exceed 260°C for ≤10 seconds, and preheat ramp rate should stay within 3°C/s. Its straight-lead form factor ensures consistent wetting and void-free joints in high-throughput meter assembly lines.

AH1815-P-A Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP, Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Active

Function:: Omnipolar Switch

Technology:: Hall Effect

Polarization:: North Pole, South Pole

Sensing Range:: ±54mT Trip, ±49mT Release

Test Condition:: -40°C ~ 125°C

Voltage - Supply:: 2.5V ~ 5.5V

Current - Supply (Max):: 12mA

Current - Output (Max):: 2.5mA

Output Type:: Open Drain

Features:: Sleep Mode

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH1815-P-A FAQ

1.How can I place an order for AH1815-P-A through Aetrix?

Please submit a Request for Quotation (RFQ) for AH1815-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 AH1815-P-A reliable?

The price and inventory of AH1815-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 AH1815-P-A is usually 5 days.

3.What payment methods are accepted for AH1815-P-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1815-P-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH1815-P-A?

AH1815-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH1815-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 AH1815-P-A?

For technical support, including AH1815-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1815-P-A requirements.

6.How does Aetrix verify that AH1815-P-A is sourced from the original manufacturer or authorized distributors?

All AH1815-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 AH1815-P-A meets industry standards.

7.What is the process for return or replacement of AH1815-P-A?

All AH1815-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH1815-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 AH1815-P-A part is unused and in its original packaging.

Return procedure for AH1815-P-A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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