LBA126 Equivalent & Substitute Parts

Part Overview

The LBA126 is a solid-state relay manufactured by IXYS Integrated Circuits Division, configured as SPST-NO/NC (1 Form A and B) in an 8-DIP package. This OptoMOS® series component handles 170 mA load current across 0–250 V AC/DC applications with a control voltage of 1.2 VDC. The part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring compatible functionality.

Substiute Parts

LBA126

IXYS Integrated Circuits DivisionIn Stock: 3473LBA126 Datasheet

Current PartRFQ

LBA127

IXYS Integrated Circuits DivisionIn Stock: 1610LBA127 Datasheet

DirectRFQ

LH1512BB

Vishay Semiconductor Opto DivisionIn Stock: 20251LH1512BB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LBA126 is determined by the following criteria:

• Circuit configuration must remain SPST-NO + SPST-NC (1 Form A and B)
• Load current rating must meet or exceed 170 mA
• Load voltage range must cover 0 V ~ 250 V or be compatible within application limits
• Package and mounting type must be 8-DIP (0.300", 7.62mm) through-hole
• Input control voltage must be compatible with 1.2 VDC operation
• Output type must support both AC and DC loads

Two substitute parts meet these criteria: LBA127 (direct IXYS manufacturer upgrade) and LH1512BB (Vishay cross-manufacturer equivalent).

Parameter Comparison

Engineering Selection Recommendations

LBA127 is the primary substitute for LBA126. Both components are manufactured by IXYS within the same OptoMOS® series, ensuring design continuity. The LBA127 provides improved specifications with 200 mA load current capacity and reduced on-state resistance (10 Ohms vs. 15 Ohms), while maintaining identical package geometry and control voltage compatibility. The LBA127 holds active product status with ROHS3 compliance, supporting long-term availability and regulatory requirements.

LH1512BB (Vishay) serves as a secondary cross-manufacturer equivalent. It matches the LBA127 in load current and on-state resistance performance. The primary consideration is the reduced maximum load voltage specification (0 V ~ 200 V vs. 0 V ~ 250 V). Applications operating loads above 200 V require LBA127. The LH1512BB input voltage specification (1.26 VDC) remains compatible with standard 1.2 VDC control circuits. LH1512BB is actively produced with ROHS3 compliance and higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can LBA127 directly replace LBA126 in existing designs? A: Yes. LBA127 maintains identical package geometry (8-DIP), circuit configuration (SPST-NO + SPST-NC), and control voltage (1.2 VDC). The improved current rating and reduced on-state resistance provide enhanced performance without design modification.

Q: What is the key difference between LBA127 and LH1512BB? A: The maximum load voltage specification differs. LBA127 supports 0–250 V; LH1512BB supports 0–200 V. Both handle 200 mA load current and feature 10 Ohms on-state resistance. Select LBA127 for applications requiring full 250 V load voltage capability.

Q: Are both substitutes pin-compatible with LBA126? A: Yes. Both LBA127 and LH1512BB use identical 8-DIP (0.300", 7.62mm) through-hole packaging with matching pin assignments for SPST-NO + SPST-NC configuration.

Q: Do the substitute parts meet current regulatory requirements? A: Yes. Both LBA127 and LH1512BB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. LBA126, being obsolete, does not carry current compliance certifications.

Q: What is the impact of the 10 Ohm vs. 15 Ohm on-state resistance difference? A: Lower on-state resistance reduces power dissipation and heat generation in the relay. Both LBA127 and LH1512BB at 10 Ohms provide improved thermal performance compared to LBA126 at 15 Ohms, beneficial for high-duty-cycle applications.

Q: Can LH1512BB be used in all LBA126 applications? A: LH1512BB is suitable for applications where the load voltage does not exceed 200 V. For applications requiring the full 0–250 V range, LBA127 is the appropriate choice.