LBA126S Equivalent & Substitute Parts

Part Overview

The LBA126S is a solid-state relay manufactured by IXYS Integrated Circuits Division, part of the OptoMOS® series. It functions as a SPST-NO/NC (1 Form A and B) relay with a maximum load current of 170 mA and operates across 0–250 V AC/DC. The device is surface-mounted in an 8-SMD package with gull wing termination.

The LBA126S is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LBA126S

IXYS Integrated Circuits DivisionIn Stock: 932LBA126S Datasheet

Current PartRFQ

LBA127S

IXYS Integrated Circuits DivisionIn Stock: 3404LBA127S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LBA126S is determined by the following critical parameters:

• Circuit Configuration: Must maintain SPST-NO + SPST-NC (1 Form A and B) topology
• Mounting Type: Surface mount requirement
• Package / Case: 8-SMD (0.300", 7.62mm) form factor with gull wing termination
• Input Voltage: 1.2 VDC control signal
• Load Voltage Range: 0 V ~ 250 V AC/DC capability
• Load Current Capacity: Minimum 170 mA (equal or greater)
• On-State Resistance: Maximum 15 Ohms (equal or lower)

The LBA127S qualifies as a direct substitute because it maintains identical circuit configuration, package geometry, input voltage, and load voltage specifications. The LBA127S provides enhanced performance with 200 mA load current capacity and 10 Ohms maximum on-state resistance, both superior to the LBA126S baseline specifications.

Parameter Comparison

Engineering Selection Recommendations

The LBA127S is the direct substitute for the LBA126S. Both components share identical mechanical and electrical interface specifications, ensuring PCB-level compatibility without layout modifications.

The LBA127S carries Active product status, providing long-term supply chain availability and manufacturing support. The LBA126S is classified as Obsolete, making the transition to LBA127S necessary for new production and ongoing supply continuity.

The LBA127S demonstrates improved electrical performance with higher load current capacity (200 mA versus 170 mA) and lower on-state resistance (10 Ohms versus 15 Ohms). These enhancements provide operational margin without introducing compatibility concerns.

Both components maintain identical Moisture Sensitivity Level (MSL 1 - Unlimited) and REACH compliance status, ensuring equivalent environmental and regulatory handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the LBA127S be used as a direct replacement for the LBA126S in existing designs?

A: Yes. The LBA127S maintains identical circuit configuration (SPST-NO + SPST-NC), package geometry (8-SMD, 0.300" / 7.62mm), termination style (gull wing), input voltage (1.2 VDC), and load voltage range (0–250 V AC/DC). No PCB modifications or design changes are required.

Q: What are the key differences between LBA126S and LBA127S?

A: The LBA127S provides enhanced load current capacity (200 mA versus 170 mA) and lower on-state resistance (10 Ohms maximum versus 15 Ohms maximum). The LBA127S is Active status; the LBA126S is Obsolete.

Q: Are there any compliance or environmental differences between these parts?

A: Both components share identical Moisture Sensitivity Level (MSL 1 - Unlimited) and REACH compliance status. No differences in environmental or regulatory handling apply.

Q: Why is the LBA126S classified as obsolete?

A: The LBA126S is no longer in active production. The LBA127S serves as the current production equivalent within the OptoMOS® LBA series.

Q: Will substituting LBA127S affect circuit performance?

A: The LBA127S provides equal or superior performance across all specified parameters. Lower on-state resistance and higher load current capacity represent operational improvements with no negative impact on existing circuit function.