LAA100LSTR Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LAA100LSTR is an IXYS OptoMOS® solid state relay featuring SPST-NO (1 Form A) configuration with dual channels in an 8-SMD surface mount package. This component is rated for 120 mA load current across 0-350V AC/DC applications with 1.2VDC input control voltage. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

LAA100LSTR

IXYS Integrated Circuits DivisionIn Stock: 3124LAA100LSTR Datasheet

Current PartRFQ

AQW210HLAZ

Panasonic Electric WorksIn Stock: 20326AQW210HLAZ Datasheet

MFR RecommendedRFQ

LH1520AACTR

Vishay Semiconductor Opto DivisionIn Stock: 1336LH1520AACTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LAA100LSTR is determined by strict alignment of the following electrical and mechanical parameters:

• Circuit configuration must be SPST-NO (1 Form A) x 2
• Load voltage range must span 0 V ~ 350 V
• Load current rating must be 120 mA or greater
• On-state resistance must not exceed 25 Ohms
• Package must be 8-SMD (0.300", 7.62mm) with Gull Wing termination
• Mounting type must be Surface Mount
• Output type must support both AC and DC

The identified substitute parts meet these criteria while maintaining compatibility with existing PCB layouts and assembly processes. Input control voltage variations within the range of 1.14 VDC to 1.26 VDC are acceptable as they fall within standard logic-level control thresholds for solid state relay applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and meet the electrical and mechanical requirements for direct substitution in SPST-NO solid state relay applications rated for 0-350V load voltage and 120 mA operation.

The LAA100LSTR and LH1520AACTR both carry RoHS3 compliance with MSL Level 1 (Unlimited) moisture sensitivity ratings, providing equivalent environmental qualification. The AQW210HLAZ carries RoHS compliance with Not Applicable MSL designation, indicating alternative environmental handling may apply.

The LH1520AACTR offers superior on-state resistance performance at 20 Ohms maximum compared to 25 Ohms for the primary part, with slightly reduced load current rating of 110 mA. The AQW210HLAZ maintains identical electrical specifications to the LAA100LSTR with marginally lower input control voltage requirement of 1.14 VDC.

Selection between these parts should be based on availability, supply chain lead times, and specific application requirements for moisture sensitivity handling and compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can the AQW210HLAZ replace the LAA100LSTR in all applications?

A: Yes, the AQW210HLAZ meets all electrical and mechanical substitution criteria. The 1.14 VDC input control voltage is compatible with standard logic-level control circuits. Verify that your supply chain and compliance documentation requirements align with Panasonic's RoHS and MSL specifications.

Q: Is the LH1520AACTR suitable for 120 mA load applications?

A: The LH1520AACTR is rated for 110 mA maximum load current, which is 10 mA below the LAA100LSTR specification. This part is suitable only for applications where the actual load current does not exceed 110 mA. Verify your circuit's maximum load current requirement before selection.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use identical 8-SMD (0.300", 7.62mm) packaging with Gull Wing termination, ensuring direct PCB footprint compatibility without layout modifications.

Q: What is the difference in on-state resistance between these parts?

A: The LAA100LSTR and AQW210HLAZ both specify 25 Ohms maximum on-state resistance. The LH1520AACTR specifies 20 Ohms maximum, providing lower resistance and reduced power dissipation. This difference is negligible for most applications but may be advantageous in high-frequency switching or power-sensitive designs.

Q: Do all parts support both AC and DC load switching?

A: Yes. All three parts are rated for AC and DC output type, supporting both alternating and direct current load applications across the 0-350V range.

Q: What are the inventory considerations for these parts?

A: The LAA100LSTR has 3,080 pieces in stock, the AQW210HLAZ has 20,300 pieces, and the LH1520AACTR has 1,294 pieces available. Inventory levels may influence selection based on project timeline and volume requirements.