AH175-PL-B-A Equivalent & Substitute Parts

Part Overview

The AH175-PL-B-A is a digital switch latch Hall Effect magnetic sensor manufactured by Diodes Incorporated in a 3-SIP package. This component functions as an open collector output magnetic switch with south pole polarization, designed for applications requiring latching magnetic detection. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar functionality.

Substiute Parts

AH175-PL-B-A

Diodes IncorporatedIn Stock: 8703AH175-PL-B-A Datasheet

Current PartRFQ

AH175-PG-B-A

Diodes IncorporatedIn Stock: 33365AH175-PG-B-A Datasheet

DirectRFQ

OHS3075U

TT Electronics/Optek TechnologyIn Stock: 828OHS3075U Datasheet

MFR RecommendedRFQ

OHS3175U

TT Electronics/Optek TechnologyIn Stock: 1839OHS3175U Datasheet

MFR RecommendedRFQ

OHS3177U

TT Electronics/Optek TechnologyIn Stock: 821OHS3177U Datasheet

MFR RecommendedRFQ

OMH3075B

TT Electronics/Optek TechnologyIn Stock: 1191OMH3075B Datasheet

MFR RecommendedRFQ

OMH3075S

TT Electronics/Optek TechnologyIn Stock: 1536OMH3075S Datasheet

MFR RecommendedRFQ

TLE4935LHALA1

Infineon TechnologiesIn Stock: 2231TLE4935LHALA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AH175-PL-B-A is determined by the following critical parameters:

• Function: Must be Latch type magnetic switch
• Technology: Hall Effect sensor
• Polarization: South Pole
• Output Type: Open Collector
• Mounting Type: Through Hole
• Voltage Supply Range: Must encompass or be compatible with 4.6V ~ 20V
• Current Output (Max): Must support minimum 25mA
• Operating Temperature: Must cover -40°C ~ 150°C or be suitable for the application's temperature range
• RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped based on sensing range compatibility and package form factor. Parts with similar or tighter sensing ranges (lower mT values) are direct functional equivalents. Parts with different package types (TO-92-3, SSO-3-2) require mechanical redesign but maintain electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Equivalent (Same Package)

AH175-PG-B-A is the direct equivalent from Diodes Incorporated, maintaining identical electrical specifications and the same 3-SIP package form factor. This part is currently active in production with substantial inventory availability (33,300 pcs), making it the preferred replacement for AH175-PL-B-A in existing designs without mechanical redesign.

Alternative Substitutes (Package Redesign Required)

OHS3177U and TLE4935LHALA1 are functionally compatible substitutes with 20mT sensing range, matching the original part's trip threshold more closely than higher-threshold alternatives. Both require mechanical accommodation of different package geometries (TO-92-3 and SSO-3-2 respectively). OHS3177U is available from TT Electronics/Optek with active product status. TLE4935LHALA1 from Infineon carries Last Time Buy status and includes automotive-grade qualification (AEC-Q100) with extended output current capability (100mA).

Extended Temperature Range Options

OMH3075B and OMH3075S provide extended lower operating temperature (-55°C vs. -40°C) with higher supply current tolerance (11mA vs. 6mA), suitable for applications requiring enhanced thermal performance. These parts feature 27.5mT sensing range and require package redesign.

Inventory and Compliance Considerations

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Selection should prioritize active product status parts (AH175-PG-B-A, OHS3177U, OMH3075B, OMH3075S) over Last Time Buy options (TLE4935LHALA1) for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can OHS3075U replace AH175-PL-B-A directly?

A: OHS3075U is functionally compatible but has a higher sensing range (25mT trip vs. 6mT trip). Direct substitution is possible only if the application's magnetic field environment accommodates the higher threshold. Package redesign is required (TO-92-3 vs. 3-SIP).

Q: What is the difference between OMH3075B and OMH3075S?

A: Both parts are electrically identical with 27.5mT sensing range, -55°C ~ 125°C operating temperature, and 11mA maximum supply current. The designation difference (B vs. S) reflects manufacturer packaging or internal variant coding but does not affect functional performance.

Q: Is TLE4935LHALA1 suitable for new designs?

A: TLE4935LHALA1 is available but carries Last Time Buy status, indicating limited future availability. For new designs requiring long-term supply, AH175-PG-B-A or OHS3177U are preferred. TLE4935LHALA1 is appropriate only if automotive-grade qualification (AEC-Q100) and higher output current (100mA) are specific requirements.

Q: What are the package compatibility considerations?

A: AH175-PL-B-A uses 3-SIP package. AH175-PG-B-A maintains this package for direct mechanical compatibility. OHS3075U, OHS3177U, OMH3075B, OMH3075S use TO-92-3 package (3-SSIP), and TLE4935LHALA1 uses SSO-3-2 package. Substitution with different packages requires PCB layout and mechanical redesign.

Q: How do sensing ranges affect substitution?

A: The original AH175-PL-B-A has 6mT trip threshold. Substitutes with lower thresholds (OHS3177U at 20mT, TLE4935LHALA1 at 20mT) require stronger magnetic fields for activation. Substitutes with higher thresholds (OHS3075U at 25mT, OMH3075B/S at 27.5mT) require even stronger fields. Application magnetic field strength must be verified against the substitute's sensing range.

Q: Are all substitutes RoHS and REACH compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's compliance status.