AH182-WL-7 Equivalent & Substitute Parts

Part Overview

The AH182-WL-7 is a unipolar Hall Effect magnetic switch manufactured by Diodes Incorporated in SC-59-3 surface mount packaging. This digital switch operates with open drain output and is designed for magnetic field detection applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance requirements. Substitute parts must maintain functional compatibility across sensing characteristics, electrical performance, and package form factor.

Key Parameters

Parameter	AH182-WL-7
Manufacturer	Diodes Incorporated
Function	Unipolar Switch
Technology	Hall Effect
Polarization	North Pole
Sensing Range	-6mT Trip, 1mT Release
Voltage Supply	2.5V ~ 5.5V
Current Supply (Max)	10µA
Current Output (Max)	10mA
Output Type	Open Drain
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution logic for the AH182-WL-7 is based on the following critical parameters:

Functional Compatibility Criteria:

Hall Effect technology with unipolar switch operation
Open drain or open collector output configuration
SC-59-3 package form factor (TO-236-3, SOT-23-3)
Surface mount mounting type

Electrical Performance Criteria:

Supply voltage range compatibility (minimum 2.5V operation required)
Output current capability (minimum 10mA)
Sensing range and magnetic field detection characteristics
Operating temperature range coverage

Quality & Compliance Criteria:

RoHS3 compliance
Moisture sensitivity level rating
Product status (active preferred for long-term availability)

The substitute parts listed below meet these criteria with variations in sensing thresholds, supply voltage ranges, and temperature ratings that allow functional replacement in the target application.

Parameter Comparison

Parameter	AH182-WL-7	AH182-WG-7	TLE4906KHTSA1	TLI4906KHTSA1	TLV4906KFTSA1
Manufacturer	Diodes Incorporated	Diodes Incorporated	Infineon Technologies	Infineon Technologies	Infineon Technologies
Function	Unipolar Switch	Unipolar Switch	Unipolar Switch	Unipolar Switch	Unipolar Switch
Technology	Hall Effect	Hall Effect	Hall Effect	Hall Effect	Hall Effect
Polarization	North Pole	North Pole	South Pole	South Pole	South Pole
Sensing Range (Trip)	-6mT	-6mT	14.6mT	13.9mT	13.9mT
Sensing Range (Release)	1mT	1mT	5mT	4.7mT	4.7mT
Voltage Supply	2.5V ~ 5.5V	2.5V ~ 5.5V	2.7V ~ 18V	2.7V ~ 18V	2.7V ~ 18V
Current Supply (Max)	10µA	10µA	6mA	6mA	6mA
Current Output (Max)	10mA	10mA	20mA	20mA	20mA
Output Type	Open Drain	Open Drain	Open Collector	Open Drain	Open Drain
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Standard	Standard	Automotive	Automotive	Automotive
Qualification	None Listed	None Listed	AEC-Q100	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

Direct Diodes Incorporated Substitute: AH182-WG-7 provides identical electrical and functional specifications to the AH182-WL-7, with the primary difference being packaging format (Cut Tape versus unspecified). Both parts are obsolete, making this option suitable only for existing inventory management.

Active Infineon Technologies Substitutes: The Infineon TLE4906KHTSA1, TLI4906KHTSA1, and TLV4906KFTSA1 are active products with AEC-Q100 automotive qualification. These parts offer extended supply voltage ranges (2.7V ~ 18V), improved moisture sensitivity ratings (MSL 1), and higher output current capability (20mA). However, they feature South Pole polarization and higher sensing thresholds compared to the North Pole AH182-WL-7.

Selection Basis:

For applications requiring North Pole polarization and lower sensing thresholds, AH182-WG-7 maintains exact compatibility but faces obsolescence risk.
For new designs or long-term production, Infineon substitutes provide active product status, automotive-grade reliability, and superior environmental ratings, with the requirement that application circuits accommodate South Pole polarization and adjusted sensing characteristics.
TLV4906KFTSA1 matches the AH182-WL-7 operating temperature range (-40°C ~ 85°C), minimizing thermal performance differences.

Frequently Asked Questions (FAQ)

Q: Can TLE4906KHTSA1, TLI4906KHTSA1, or TLV4906KFTSA1 directly replace AH182-WL-7 without circuit modification?

A: Direct pin-compatible replacement is possible due to identical SC-59-3 package form factor. However, functional differences exist: Infineon parts use South Pole polarization versus North Pole in the AH182-WL-7, and sensing thresholds are significantly higher (14.6mT ~ 13.9mT trip versus -6mT). Circuit validation is required to confirm magnetic field orientation and threshold compatibility with the target application.

Q: What is the difference between open drain and open collector output?

A: Both are switch-type outputs that require external pull-up resistors. Open drain uses NMOS output stage; open collector uses BJT output stage. For the AH182-WL-7 (open drain) and TLE4906KHTSA1 (open collector), functional behavior is equivalent in standard logic applications. TLI4906KHTSA1 and TLV4906KFTSA1 use open drain, matching the original part.

Q: Why do Infineon parts have higher supply voltage ranges?

A: Infineon TLE4906, TLI4906, and TLV4906 series are designed for automotive applications with broader voltage tolerance. The extended 2.7V ~ 18V range accommodates vehicle electrical systems with transient overvoltage conditions. Applications limited to 2.5V ~ 5.5V operation remain fully compatible.

Q: Are there differences in temperature compensation between these parts?

A: AH182-WL-7 specifications do not indicate temperature compensation. Infineon parts (TLE4906KHTSA1, TLI4906KHTSA1, TLV4906KFTSA1) feature temperature compensation, improving sensing threshold stability across the operating temperature range. This enhances reliability in variable thermal environments.

Q: What does MSL rating mean for these components?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient humidity before soldering. AH182-WL-7 has MSL 3 (168 hours maximum); Infineon substitutes have MSL 1 (unlimited storage). Lower MSL ratings reduce moisture-related soldering defects and simplify inventory management.

Q: Is AEC-Q100 qualification required for my application?

A: AEC-Q100 is an automotive industry standard for component reliability. If your application is non-automotive, AEC-Q100 qualification is not required. However, it indicates higher reliability testing and is beneficial for demanding industrial or extended-temperature applications.

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