AH3391Q-SA-7 Equivalent & Substitute Parts

Part Overview

The AH3391Q-SA-7 is a unipolar Hall effect magnetic switch manufactured by Diodes Incorporated, housed in a SOT-23-3 surface mount package. This digital switch operates with open drain output and is qualified to AEC-Q100 automotive standards. The product is currently in Last Time Buy status, making identification of equivalent substitute parts essential for design continuity and procurement planning.

Substiute Parts

AH3391Q-SA-7

Diodes IncorporatedIn Stock: 7913AH3391Q-SA-7 Datasheet

Current PartRFQ

AH3321Q-SA-7

Diodes IncorporatedIn Stock: 948AH3321Q-SA-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AH3391Q-SA-7 is based on the following critical parameters that must remain consistent:

• Function: Unipolar Switch operation
• Technology: Hall Effect sensing
• Package: SOT-23-3 surface mount configuration
• Output Type: Open Drain
• Supply Voltage: 3V to 28V range
• Operating Temperature: -40°C to 150°C
• Polarization: South Pole detection
• Compliance: ROHS3 and REACH requirements

The AH3321Q-SA-7 qualifies as a direct substitute based on matching all core electrical and mechanical parameters. Variations in sensing range thresholds do not preclude substitution when application requirements permit tolerance of the specified trip and release points.

Parameter Comparison

Engineering Selection Recommendations

The AH3321Q-SA-7 is the qualified substitute for the AH3391Q-SA-7. Both parts maintain identical electrical specifications for supply voltage, output current, and operating temperature range. The AH3321Q-SA-7 carries Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the main part.

Both parts satisfy ROHS3 compliance and REACH requirements. The AH3321Q-SA-7 includes temperature compensation as an additional feature. The sensing range thresholds differ between the two parts; applications must confirm that the AH3321Q-SA-7 trip point of 30mT and release point of 21mT are compatible with the intended magnetic field environment.

Frequently Asked Questions (FAQ)

Q: Can the AH3321Q-SA-7 be used as a direct replacement for the AH3391Q-SA-7 in existing designs?

A: Yes, the AH3321Q-SA-7 qualifies as a direct substitute. Both parts share identical package geometry (SOT-23-3), pinout configuration, supply voltage range (3V to 28V), output type (open drain), and operating temperature range (-40°C to 150°C). Pin-for-pin compatibility is maintained.

Q: What is the primary difference between these two parts?

A: The primary difference is the magnetic sensing threshold. The AH3391Q-SA-7 has a trip point of 27.5mT and release point of 25mT, while the AH3321Q-SA-7 has a trip point of 30mT and release point of 21mT. The AH3321Q-SA-7 also includes temperature compensation. Applications must confirm these thresholds are acceptable for their magnetic field environment.

Q: Why is the AH3391Q-SA-7 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this part number. The AH3321Q-SA-7, with Active status, represents the recommended path forward for new designs and ongoing production.

Q: Are both parts automotive qualified?

A: The AH3391Q-SA-7 carries AEC-Q100 automotive qualification. The AH3321Q-SA-7 specifications provided do not explicitly list AEC-Q100 qualification in the input data.

Q: Do these parts require any special handling or storage considerations?

A: Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without special moisture control measures.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Both parts operate across the same temperature range of -40°C to 150°C. The AH3321Q-SA-7 includes temperature compensation, which may provide improved performance stability across this range.