AH374-P-B Equivalent & Substitute Parts

Part Overview

The AH374-P-B is an active Hall Effect magnetic switch latch manufactured by Diodes Incorporated, designed for digital switching applications requiring open drain output. This component operates across a wide supply voltage range and provides temperature-compensated sensing for reliable performance in industrial and consumer applications. The part is currently in active production status with substantial inventory availability. Substitute parts may be required due to supply constraints, design optimization needs, or application-specific parameter requirements.

Substiute Parts

AH374-P-B

Diodes IncorporatedIn Stock: 18253AH374-P-B Datasheet

Current PartRFQ

AH3774-P-B

Diodes IncorporatedIn Stock: 30453AH3774-P-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AH3774-P-B qualifies as a direct substitute based on the following alignment criteria:

Matching Parameters:

• Identical manufacturer (Diodes Incorporated)
• Identical technology (Hall Effect latch with open drain output)
• Identical mounting type (Through Hole)
• Identical package form factor (3-SIP)
• Identical RoHS3 compliance status
• Identical operating temperature range (-40°C ~ 125°C)
• Identical supply current specification (4mA maximum)
• Temperature compensated feature present in both variants

Allowable Variations:

• Polarization: AH374-P-B supports North Pole and South Pole; AH3774-P-B supports South Pole only
• Sensing Range: AH374-P-B operates at 5mT trip/-5mT release; AH3774-P-B operates at 6mT trip/-6mT release
• Supply Voltage: AH374-P-B operates 2.2V ~ 20V; AH3774-P-B operates 3V ~ 28V
• Output Current: AH374-P-B maximum 25mA; AH3774-P-B maximum 60mA

These variations remain within acceptable substitution parameters for Hall Effect latch sensors, provided the application requirements align with the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the AH374-P-B and AH3774-P-B maintain active product status with ROHS3 compliance and REACH unaffected classification, ensuring regulatory alignment for current applications. Selection between these parts depends on application-specific requirements:

The AH374-P-B is suitable for applications requiring dual-pole sensitivity (North and South) with lower output current demands (25mA maximum) and lower supply voltage thresholds (2.2V minimum).

The AH3774-P-B is suitable for applications requiring higher output current capability (60mA maximum), extended supply voltage range (up to 28V), and South Pole-only sensing with slightly higher magnetic trip thresholds (6mT).

Both components share identical supply current consumption, operating temperature range, and mounting characteristics, supporting direct substitution within the constraints of the specified parameter variations.

Frequently Asked Questions (FAQ)

Q: Can AH3774-P-B replace AH374-P-B in all applications?

A: Substitution is valid only when the application requirements align with the AH3774-P-B specifications. Verify that your circuit operates within the 3V ~ 28V supply range, requires only South Pole sensing, and can accommodate the 6mT trip threshold and 60mA output current capability.

Q: What is the primary difference in sensing range between these parts?

A: The AH374-P-B operates at 5mT trip and -5mT release thresholds, while the AH3774-P-B operates at 6mT trip and -6mT release thresholds. Applications with precise magnetic field requirements must account for this 1mT difference.

Q: Are both parts compatible with the same PCB footprint?

A: Both components use identical 3-SIP through-hole mounting, ensuring mechanical compatibility. However, verify electrical compatibility with your circuit design before substitution.

Q: What is the significance of polarization differences?

A: The AH374-P-B supports both North Pole and South Pole magnetic field detection, while the AH3774-P-B supports South Pole only. Applications requiring North Pole sensing must use the AH374-P-B.

Q: Can the AH3774-P-B handle higher output current loads?

A: Yes. The AH3774-P-B supports 60mA maximum output current compared to the AH374-P-B's 25mA, providing greater drive capability for downstream circuitry.

Q: Are there supply voltage compatibility concerns?

A: The AH374-P-B minimum supply voltage is 2.2V, while the AH3774-P-B minimum is 3V. Applications operating below 3V must use the AH374-P-B. The AH3774-P-B supports higher maximum voltage (28V vs 20V).