LBA126LS Equivalent & Substitute Parts

Part Overview

The LBA126LS is a solid-state relay manufactured by IXYS Integrated Circuits Division, configured as SPST-NO/NC (1 Form A and B) with 150 mA load capacity and 0–250 V operating range. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates on 1.2 VDC input and features a maximum on-state resistance of 20 Ohms in an 8-SMD surface-mount package.

Substiute Parts

LBA126LS

IXYS Integrated Circuits DivisionIn Stock: 759LBA126LS Datasheet

Current PartRFQ

LBA127LS

IXYS Integrated Circuits DivisionIn Stock: 958LBA127LS Datasheet

DirectRFQ

LH1512BAC

Vishay Semiconductor Opto DivisionIn Stock: 1246LH1512BAC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LBA126LS is determined by the following critical parameters:

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

Two substitute parts meet these criteria: LBA127LS (same manufacturer, active product status) and LH1512BAC (Vishay alternative, active product status).

Parameter Comparison

Engineering Selection Recommendations

LBA127LS is the primary substitute for LBA126LS. Both parts are manufactured by IXYS Integrated Circuits Division and share identical electrical specifications (150 mA load current, 0–250 V load voltage range, 1.2 VDC input). LBA127LS holds active product status and is ROHS3 compliant, providing long-term availability and regulatory compliance. The on-state resistance is improved at 15 Ohms maximum compared to 20 Ohms on the obsolete LBA126LS. Packaging and termination are identical, ensuring direct PCB compatibility.

LH1512BAC is a cross-manufacturer alternative from Vishay Semiconductor Opto Division. This part maintains the same circuit configuration, package, and mounting specifications. Key differences include higher load current capacity (200 mA versus 150 mA), reduced maximum on-state resistance (10 Ohms), and slightly lower maximum load voltage (200 V versus 250 V). LH1512BAC is ROHS3 compliant and actively manufactured. Selection of this part is appropriate when the 200 V load voltage limit is acceptable and the improved current handling and lower resistance provide system benefits.

Both substitutes are REACH unaffected and maintain MSL 1 (Unlimited) moisture sensitivity classification, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can LBA127LS be used as a direct replacement for LBA126LS?

A: Yes. LBA127LS is a direct substitute. Both parts share identical circuit configuration (SPST-NO + SPST-NC), package (8-SMD 0.300"), input voltage (1.2 VDC), load voltage range (0–250 V), and load current (150 mA). LBA127LS is actively manufactured and ROHS3 compliant, whereas LBA126LS is obsolete. The improved on-state resistance (15 Ohms versus 20 Ohms) on LBA127LS provides additional performance margin.

Q: What are the limitations of LH1512BAC as a substitute?

A: LH1512BAC has a maximum load voltage of 200 V, compared to 250 V for LBA126LS. If your application requires operation above 200 V, LH1512BAC is not suitable. All other electrical and mechanical parameters are compatible or superior (higher current capacity, lower on-state resistance).

Q: Are the packages physically identical?

A: Yes. Both LBA127LS and LH1512BAC use the same 8-SMD (0.300", 7.62mm) package with Gull Wing termination as LBA126LS. Both are surface-mount components with identical footprints and pin configurations, enabling direct PCB substitution without layout modifications.

Q: Do the substitute parts meet the same regulatory requirements?

A: Both LBA127LS and LH1512BAC are ROHS3 compliant and REACH unaffected, matching the regulatory status of LBA126LS. Both maintain MSL 1 (Unlimited) moisture sensitivity classification. Compliance documentation should be verified with the respective manufacturers for specific applications.

Q: Which substitute should I select for new designs?

A: LBA127LS is recommended for new designs requiring the full 0–250 V load voltage range. LH1512BAC is suitable when the 0–200 V range is acceptable and the higher current capacity (200 mA) or lower on-state resistance (10 Ohms) provide system advantages. Both parts are actively manufactured with established supply chains.