HAL556UA-E Equivalent & Substitute Parts

Part Overview

The HAL556UA-E is a unipolar Hall effect magnetic switch manufactured by TDK-Micronas GmbH, designed for digital switching applications with open drain output. This component operates across a 4V to 24V supply range with a sensing range of 7.4mT trip and 2mT release thresholds. The HAL556UA-E is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

HAL556UA-E

TDK-Micronas GmbHIn Stock: 1114HAL556UA-E Datasheet

Current PartRFQ

HAL1565 SU-A

TDK-Micronas GmbHIn Stock: 20798HAL1565 SU-A Datasheet

MFR RecommendedRFQ

HAL1565 UA

TDK-Micronas GmbHIn Stock: 3102HAL1565 UA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HAL556UA-E is determined by the following critical parameters:

Core Functional Requirements:

• Technology: Hall Effect unipolar switch
• Polarization: South Pole
• Output Type: Open Drain or Current Source
• Function: Unipolar Switch

Electrical Compatibility Criteria:

• Supply voltage range must encompass or overlap with 4V ~ 24V
• Sensing range thresholds (trip and release points) must be compatible with application requirements
• Current supply specifications must meet circuit design constraints

Physical and Environmental Constraints:

• Mounting type compatibility (through hole vs. surface mount affects PCB design)
• Operating temperature range must support application environment
• Package form factor determines board layout feasibility

Two active substitute parts are identified: HAL1565 SU-A (surface mount, SOT-23-3) and HAL1565 UA (through hole, TO-92UA). Both maintain core Hall effect unipolar switch functionality with south pole polarization. The HAL1565 UA provides the closest form factor match to the original HAL556UA-E through hole package.

Parameter Comparison

Engineering Selection Recommendations

HAL1565 UA (Recommended for Direct Replacement): The HAL1565 UA is the primary substitute for through-hole applications. It maintains identical package geometry (TO-92UA, TO-226-3, TO-92-3 formed leads) and mounting type, enabling direct PCB retrofit without layout modifications. This part is active with ROHS3 compliance and AEC-Q100 automotive qualification. The extended operating temperature range (-40°C to 170°C) exceeds the original specification. Output type differs (current source vs. open drain), requiring circuit verification for compatibility. Sensing range parameters (6mT trip, 4.1mT release) differ from the original; application-specific validation is necessary.

HAL1565 SU-A (Alternative for Surface Mount Redesign): The HAL1565 SU-A serves applications permitting PCB redesign to surface mount technology. This part offers the same core Hall effect unipolar switch functionality with open drain output matching the original HAL556UA-E. ROHS3 compliance and MSL 1 rating support standard manufacturing processes. The reduced operating temperature range (-40°C to 70°C) may limit use in high-temperature environments. Sensing range parameters match the HAL1565 UA variant.

Both substitutes are active products with current manufacturing support and improved compliance certifications compared to the obsolete HAL556UA-E.

Frequently Asked Questions (FAQ)

Q: Can HAL1565 UA directly replace HAL556UA-E without circuit modification? A: HAL1565 UA maintains identical through-hole package geometry and form factor. However, output type differs (current source vs. open drain), and sensing range thresholds vary. Circuit compatibility must be verified before implementation.

Q: What is the primary difference between HAL1565 UA and HAL1565 SU-A? A: HAL1565 UA is a through-hole component (TO-92UA package) suitable for existing PCB designs. HAL1565 SU-A is surface mount (SOT-23-3 package) requiring PCB redesign. HAL1565 UA uses current source output; HAL1565 SU-A uses open drain output matching the original HAL556UA-E.

Q: Are the sensing range differences between HAL556UA-E and HAL1565 variants significant? A: HAL556UA-E specifies 7.4mT trip and 2mT release thresholds. Both HAL1565 variants specify 6mT trip and 4.1mT release. Application-specific magnetic field requirements determine whether these differences affect functionality.

Q: Do the substitute parts support automotive applications? A: HAL1565 UA carries AEC-Q100 qualification for automotive use. HAL1565 SU-A does not list automotive qualification in provided specifications.

Q: What is the temperature operating range difference? A: HAL556UA-E operates -40°C to 100°C. HAL1565 UA extends to -40°C to 170°C. HAL1565 SU-A is limited to -40°C to 70°C. Application environment determines suitability.

Q: Are both substitute parts RoHS compliant? A: Yes. HAL556UA-E is RoHS Compliant. Both HAL1565 UA and HAL1565 SU-A are ROHS3 Compliant, meeting current regulatory requirements.