LBA127STR Equivalent & Substitute Parts

Part Overview

The LBA127STR is an IXYS OptoMOS® solid state relay featuring SPST-NO/NC (1 Form A and B) configuration in 8-SMD surface mount packaging. This component is designed for switching applications requiring 200 mA load current across AC and DC output types with input voltage of 1.2VDC and load voltage range of 0V to 250V. The part is currently active in production with 3470 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

LBA127STR

IXYS Integrated Circuits DivisionIn Stock: 3543LBA127STR Datasheet

Current PartRFQ

LH1512BACTR

Vishay Semiconductor Opto DivisionIn Stock: 2100LH1512BACTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LBA127STR is determined by strict equivalence across the following critical parameters:

Circuit configuration must remain SPST-NO + SPST-NC (1 Form A and B) to maintain functional compatibility with the application interface.

Package and termination specifications must match: 8-SMD (0.300", 7.62mm) with Gull Wing termination for PCB assembly compatibility.

Load current rating must be equal to or greater than 200 mA to support the specified switching load.

On-state resistance must not exceed 10 Ohms to maintain electrical performance characteristics.

Input voltage must be compatible with 1.2VDC control signal requirements.

Load voltage range must support the application's 0V to 250V operating envelope.

Output type must support both AC and DC switching.

The LH1512BACTR from Vishay Semiconductor Opto Division meets these substitution criteria with the following consideration: the load voltage range is specified as 0V to 200V, which represents a 50V reduction from the LBA127STR specification. This difference must be evaluated against the specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the LBA127STR and LH1512BACTR are active production components with ROHS3 compliance and unlimited moisture sensitivity ratings, supporting long-term supply chain stability.

The LH1512BACTR is manufacturer-recommended as an equivalent substitute and carries additional approval agency certifications including CQC, FIMKO, UL, and VDE, which may provide additional qualification value in regulated applications.

Selection between these parts must account for the load voltage specification difference. The LBA127STR supports 0V to 250V load voltage, while the LH1512BACTR supports 0V to 200V. Applications requiring load voltages between 200V and 250V must use the LBA127STR.

Input voltage specifications differ slightly (1.2VDC versus 1.26VDC), which is within typical control signal tolerances but should be verified against the specific circuit design.

Both parts maintain identical load current (200 mA), on-state resistance (10 Ohms maximum), circuit configuration, package, and termination specifications.

Frequently Asked Questions (FAQ)

Q: Can the LH1512BACTR replace the LBA127STR in all applications?

A: The LH1512BACTR is functionally equivalent for applications where the load voltage does not exceed 200V. Applications requiring load voltages between 200V and 250V must use the LBA127STR.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use 8-SMD (0.300", 7.62mm) packaging with Gull Wing termination, ensuring PCB assembly compatibility without layout modifications.

Q: What is the significance of the input voltage difference (1.2VDC vs 1.26VDC)?

A: The 0.06VDC difference is minor and typically accommodated by standard control circuit design margins. Verify compatibility with the specific control signal source in your application.

Q: Do both parts support AC and DC output switching?

A: Yes. Both the LBA127STR and LH1512BACTR support AC and DC output types with identical 200 mA load current ratings.

Q: What compliance certifications apply to these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The LH1512BACTR carries additional approvals from CQC, FIMKO, UL, and VDE.

Q: Is the on-state resistance specification identical?

A: Yes. Both parts specify a maximum on-state resistance of 10 Ohms, ensuring equivalent electrical performance in switching applications.