OHN3075U Equivalent & Substitute Parts

Part Overview

The OHN3075U is a digital switch latch Hall Effect magnetic sensor manufactured by TT Electronics/Optek Technology in a TO-92-3 package. This component functions as an open collector output magnetic switch with latch capability, designed for applications requiring magnetic field detection and switching. The OHN3075U is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional equivalence in Hall Effect latch operation, open collector output configuration, and through-hole mounting compatibility while meeting current component availability and compliance requirements.

Substiute Parts

OHN3075U

TT Electronics/Optek TechnologyIn Stock: 1005OHN3075U Datasheet

Current PartRFQ

OHS3075U

TT Electronics/Optek TechnologyIn Stock: 828OHS3075U Datasheet

DirectRFQ

AH175-PG-A-A

Diodes IncorporatedIn Stock: 191874AH175-PG-A-A Datasheet

MFR RecommendedRFQ

AH175-PG-A-B

Diodes IncorporatedIn Stock: 15807AH175-PG-A-B Datasheet

MFR RecommendedRFQ

AH175-PG-B-A

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

MFR RecommendedRFQ

AH175-PG-B-B

Diodes IncorporatedIn Stock: 6455AH175-PG-B-B Datasheet

MFR RecommendedRFQ

AH1751-PG-A-A

Diodes IncorporatedIn Stock: 4757AH1751-PG-A-A Datasheet

MFR RecommendedRFQ

AH1751-PG-B-A

Diodes IncorporatedIn Stock: 158320AH1751-PG-B-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OHN3075U is determined by strict equivalence in the following core parameters:

Mandatory Equivalence Criteria:

• Function: Latch operation
• Technology: Hall Effect
• Polarization: South Pole
• Output Type: Open Collector
• Mounting Type: Through Hole
• Package / Case: 3-SIP or 3-SSIP compatible form factor

Allowable Parameter Variations:

• Sensing Range: Substitute parts may have different trip/release thresholds (6mT, 7mT, or 8mT) provided the application tolerates the sensitivity difference
• Voltage Supply: Substitute parts may have narrower or different supply voltage ranges (4.6V ~ 20V) provided the application voltage falls within the substitute's range
• Current Output (Max): Substitute parts may have higher output current capability (100mA vs 25mA) without functional impact
• Operating Temperature: Substitute parts may have extended temperature ranges (-40°C ~ 150°C or -40°C ~ 125°C) providing improved environmental performance
• Product Status: Active status substitutes are preferred over obsolete components for long-term availability

The OHS3075U represents a direct manufacturer upgrade within the same OHN/OHS series. The AH175 and AH1751 series from Diodes Incorporated provide functionally equivalent Hall Effect latch sensors with enhanced specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

OHS3075U is the primary direct substitute for OHN3075U. Both components are manufactured by TT Electronics/Optek Technology within the same OHN/OHS series, maintaining identical electrical specifications and sensing characteristics. OHS3075U holds active product status, ensuring long-term availability and supply chain continuity. This substitute is recommended for applications requiring exact parameter matching with the original OHN3075U design.

AH175 Series (AH175-PG-A-A, AH175-PG-A-B, AH175-PG-B-A, AH175-PG-B-B) from Diodes Incorporated provides functionally equivalent Hall Effect latch sensors with enhanced operating temperature range (-40°C ~ 150°C) and temperature compensation features. These parts feature lower sensing thresholds (6mT or 8mT) compared to the OHN3075U (25mT), requiring application-level assessment of magnetic field sensitivity requirements. The AH175 series maintains 25mA maximum output current and is suitable for applications where the lower trip threshold is compatible with the magnetic field environment.

AH1751 Series (AH1751-PG-A-A, AH1751-PG-B-A) from Diodes Incorporated offers enhanced output current capability (100mA maximum) with 7mT sensing threshold and temperature compensation. These parts are appropriate for applications requiring higher output drive capability or intermediate sensitivity between the OHN3075U and AH175 series. Operating temperature range extends to -40°C ~ 125°C, supporting extended environmental performance.

All substitute parts maintain ROHS3 compliance, through-hole mounting compatibility, and open collector output configuration. Selection between substitute options depends on application-specific requirements for sensing threshold, output current capability, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can OHS3075U directly replace OHN3075U in existing designs?

A: Yes. OHS3075U is the direct manufacturer equivalent within the same product series, maintaining identical electrical specifications, sensing range (25mT trip, -25mT release), supply voltage (4.5V ~ 24V), output current (25mA maximum), and package configuration (3-SSIP / TO-92-3). The primary difference is product status: OHS3075U is active while OHN3075U is obsolete. No design modifications are required.

Q: What is the key difference between AH175 and AH1751 series substitutes?

A: The primary difference is maximum output current capability. AH175 series provides 25mA maximum output current, matching the OHN3075U specification. AH1751 series provides 100mA maximum output current, suitable for applications requiring higher output drive capability. Both series feature Hall Effect latch operation, open collector output, and south pole polarization. Sensing thresholds differ: AH175 offers 6mT or 8mT options, while AH1751 offers 7mT.

Q: Are the AH175 and AH1751 parts compatible with the OHN3075U sensing range?

A: The AH175 and AH1751 series have significantly lower sensing thresholds (6mT, 7mT, or 8mT) compared to OHN3075U (25mT). These parts will trigger at lower magnetic field strengths. Substitution is appropriate only when the application's magnetic field environment is compatible with the lower threshold. Applications designed for 25mT sensitivity require either OHS3075U or confirmation that the lower threshold does not cause false triggering.

Q: Do all substitute parts support the same supply voltage range?

A: No. OHN3075U and OHS3075U support 4.5V ~ 24V supply voltage. AH175 and AH1751 series support 4.6V ~ 20V supply voltage. If the application requires supply voltages above 20V, only OHS3075U is suitable. If the application operates within 4.6V ~ 20V, all substitutes are compatible.

Q: What is the temperature performance difference between substitutes?

A: OHN3075U operates from -20°C ~ 85°C. OHS3075U extends this to -40°C ~ 125°C. AH175 series provides the widest range at -40°C ~ 150°C. AH1751 series operates from -40°C ~ 125°C. Applications requiring operation below -20°C or above 85°C require substitutes with extended temperature ratings.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. OHN3075U, OHS3075U, and all AH175/AH1751 variants are ROHS3 compliant, meeting environmental and regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: What packaging options are available for substitutes?

A: OHN3075U is supplied in standard packaging. OHS3075U is available in bulk packaging. AH175-PG-A-A is supplied in standard packaging. AH175-PG-A-B, AH175-PG-B-A, and AH175-PG-B-B are supplied in bulk packaging. AH1751-PG-A-A is supplied in cut tape (CT) packaging. AH1751-PG-B-A is supplied in bulk packaging. Packaging selection does not affect electrical or functional performance.