LAA100S Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LAA100S is an IXYS OptoMOS® solid state relay (SSR) configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with dual channels in an 8-SMD surface mount package. This component is designed for switching applications requiring AC or DC loads up to 350V at 120mA. The part is currently active in production and widely stocked, making it suitable for new designs and production environments requiring high reliability and long-term availability.

Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical parameters including load voltage range, switching current capacity, input control voltage, on-state resistance, and package form factor. Substitutes enable design flexibility, supply chain alternatives, and cost optimization while preserving circuit performance.

Substiute Parts

LAA100S

IXYS Integrated Circuits DivisionIn Stock: 2063LAA100S Datasheet

Current PartRFQ

AQW210EHA

Panasonic Electric WorksIn Stock: 5520AQW210EHA Datasheet

MFR RecommendedRFQ

LH1520AAC

Vishay Semiconductor Opto DivisionIn Stock: 3204LH1520AAC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LAA100S are qualified based on strict electrical and mechanical compatibility criteria. The following parameters must align within acceptable tolerances for a part to function as a direct substitute:

• Circuit Configuration: SPST-NO (1 Form A) x 2 dual-channel architecture
• Load Voltage Range: 0V ~ 350V (AC/DC capable)
• Load Current Capacity: Minimum 110mA (LAA100S rated at 120mA)
• Input Control Voltage: 1.14VDC to 1.26VDC range
• On-State Resistance: Maximum 25 Ohms
• Package Form Factor: 8-SMD (0.300", 7.62mm) with Gull Wing termination
• Mounting Type: Surface Mount
• Compliance: ROHS3 Compliant, REACH Unaffected

Parts meeting these criteria are functionally interchangeable in the LAA100S application space. Variations in input voltage (1.14VDC to 1.26VDC) and load current (110mA to 120mA) remain within normal circuit operating margins for SSR relay applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—LAA100S, AQW210EHA, and LH1520AAC—are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

LAA100S (IXYS): Primary reference part with 120mA load current capacity and 25 Ohm maximum on-state resistance. MSL rating of 1 (Unlimited) indicates minimal moisture sensitivity, suitable for standard storage and handling conditions.

AQW210EHA (Panasonic): Direct functional equivalent with identical 120mA load current and 25 Ohm on-state resistance. Input voltage of 1.14VDC is slightly lower than the LAA100S, providing marginally improved control circuit efficiency. MSL rating of Not Applicable indicates robust moisture tolerance. Panasonic PhotoMOS™ series offers established supply chain presence.

LH1520AAC (Vishay): Functionally compatible substitute with 110mA load current (10mA lower than LAA100S) and 20 Ohm on-state resistance (5 Ohm improvement). Input voltage of 1.26VDC is within acceptable range. MSL rating of 1 (Unlimited) matches LAA100S handling requirements. Lower on-state resistance provides reduced power dissipation in switching applications.

Selection between these parts depends on supply availability, cost structure, and specific application requirements. All three maintain electrical compatibility across the 0V ~ 350V load voltage range and dual-channel SPST-NO configuration.

Frequently Asked Questions (FAQ)

Q: Can AQW210EHA replace LAA100S in existing designs without PCB modification?

A: Yes. Both parts use identical 8-SMD (0.300", 7.62mm) package with Gull Wing termination. Pin-to-pin compatibility is maintained, allowing direct substitution on existing PCB layouts without design changes.

Q: What is the significance of the input voltage difference between LAA100S (1.2VDC) and AQW210EHA (1.14VDC)?

A: The 0.06VDC difference is within normal SSR relay control circuit tolerances. Both parts operate reliably across standard logic-level control signals (3.3V to 5V). This variation does not affect circuit functionality or switching performance.

Q: Why does LH1520AAC have lower load current (110mA) compared to LAA100S (120mA)?

A: The 10mA difference represents a minor specification variance between manufacturers. For applications requiring the full 120mA capacity, LAA100S or AQW210EHA are preferred. For applications operating below 110mA, LH1520AAC provides equivalent performance with improved on-state resistance (20 Ohms vs. 25 Ohms).

Q: Are all three parts suitable for both AC and DC load switching?

A: Yes. All three parts are rated for AC and DC output operation across the 0V ~ 350V load voltage range, making them suitable for general-purpose relay switching applications.

Q: What does MSL rating mean for component storage and handling?

A: MSL (Moisture Sensitivity Level) 1 (Unlimited) indicates the component can be stored and handled under standard conditions without special moisture control. AQW210EHA with MSL Not Applicable offers equivalent or superior moisture tolerance. Standard ESD precautions apply to all surface mount components.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: All three parts are solid state relays with identical circuit configuration and load voltage range. Switching frequency capability is determined by the specific application circuit design. Consult individual manufacturer datasheets for detailed switching frequency specifications and thermal management requirements.