LBA126LSTR Equivalent & Substitute Parts

Part Overview

The LBA126LSTR is a solid-state relay manufactured by IXYS Integrated Circuits Division, configured as SPST-NO/NC (1 Form A and B) with a rated load current of 150 mA across 0–250 V AC/DC. This component is part of the OptoMOS® series and uses surface mount 8-SMD packaging with gull wing termination.

The LBA126LSTR has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements.

Substiute Parts

LBA126LSTR

IXYS Integrated Circuits DivisionIn Stock: 880LBA126LSTR Datasheet

Current PartRFQ

LBA127LSTR

IXYS Integrated Circuits DivisionIn Stock: 3383LBA127LSTR Datasheet

DirectRFQ

LH1512BACTR

Vishay Semiconductor Opto DivisionIn Stock: 2100LH1512BACTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LBA126LSTR is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO + SPST-NC (1 Form A and B)
• Mounting Type: Must be Surface Mount
• Package / Case: Must be 8-SMD (0.300", 7.62 mm)
• Termination Style: Must be Gull Wing
• Output Type: Must support AC and DC
• Load Voltage Range: Must accommodate 0–250 V or higher
• Load Current: Must support 150 mA or higher
• Input Voltage: Must be compatible with 1.2 VDC or similar control voltage

Two substitute parts meet these criteria:

1. LBA127LSTR (IXYS Integrated Circuits Division) – Direct manufacturer equivalent with improved on-state resistance and active product status
2. LH1512BACTR (Vishay Semiconductor Opto Division) – Cross-manufacturer alternative with enhanced current rating and lower on-state resistance

Parameter Comparison

Engineering Selection Recommendations

LBA127LSTR is the primary substitute for LBA126LSTR. Both parts are manufactured by IXYS Integrated Circuits Division within the same OptoMOS® series. The LBA127LSTR maintains identical electrical specifications for input voltage, load voltage range, and load current while offering improved on-state resistance (15 Ohms vs. 20 Ohms). Critically, LBA127LSTR holds active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Packaging, termination, and circuit configuration are identical, enabling direct substitution without PCB redesign.

LH1512BACTR is a secondary cross-manufacturer substitute from Vishay Semiconductor Opto Division. This part exceeds the original specifications with 200 mA load current capability and 10 Ohms on-state resistance. However, the maximum load voltage is 200 V, which is 50 V lower than the LBA126LSTR rating. LH1512BACTR is suitable only for applications where the load voltage does not exceed 200 V. The part maintains identical packaging, termination, and circuit configuration. LH1512BACTR is active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can LBA127LSTR replace LBA126LSTR without PCB modification?

A: Yes. Both parts share identical package dimensions (8-SMD, 0.300" / 7.62 mm), gull wing termination, and circuit configuration (SPST-NO + SPST-NC). No PCB layout changes are required.

Q: What is the key difference between LBA126LSTR and LBA127LSTR?

A: The primary difference is product status and on-state resistance. LBA126LSTR is obsolete with 20 Ohms maximum on-state resistance. LBA127LSTR is active with 15 Ohms maximum on-state resistance, offering improved performance and supply continuity.

Q: When should LH1512BACTR be used instead of LBA127LSTR?

A: LH1512BACTR is appropriate when the application requires lower on-state resistance (10 Ohms) or higher load current capability (200 mA). However, applications requiring load voltages above 200 V must use LBA127LSTR or LBA126LSTR, as LH1512BACTR is rated to 200 V maximum.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use 8-SMD packaging with gull wing termination and identical circuit configuration (SPST-NO + SPST-NC). Pin assignments are compatible for direct substitution.

Q: What compliance certifications apply to these parts?

A: LBA127LSTR and LH1512BACTR are both ROHS3 compliant. All three parts are REACH unaffected and classified as EAR99 for export control purposes. LH1512BACTR carries additional approvals from CQC, FIMKO, UL, and VDE.

Q: Is there a difference in input voltage requirements?

A: Input voltage specifications are nearly identical. LBA126LSTR and LBA127LSTR require 1.2 VDC, while LH1512BACTR requires 1.26 VDC. This minor difference is not significant for most control circuit designs.