LCA211S Equivalent & Substitute Parts

Part Overview

The LCA211S is a solid-state relay (SSR) manufactured by IXYS Integrated Circuits Division, configured as a SPST-NO (Single Pole Single Throw - Normally Open) dual-channel device in an 8-SMD surface mount package. This OptoMOS® series component is designed for AC and DC load switching applications with a maximum load voltage of 350V and 85mA load current capability.

The LCA211S has reached obsolete product status. 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

LCA211S

IXYS Integrated Circuits DivisionIn Stock: 1020LCA211S Datasheet

Current PartRFQ

LCA210S

LittelfuseIn Stock: 900LCA210S Datasheet

DirectRFQ

AQW210EHA

Panasonic Electric WorksIn Stock: 5520AQW210EHA Datasheet

MFR RecommendedRFQ

AQW610EHA

Panasonic Electric WorksIn Stock: 816AQW610EHA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LCA211S are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align for functional equivalence:

• Circuit configuration (SPST-NO dual-channel topology)
• Package type (8-SMD with 0.300" / 7.62mm pitch)
• Mounting style (Surface Mount with Gull Wing termination)
• Load voltage range (0V ~ 350V AC/DC)
• Input control voltage (1.2VDC nominal)
• Load current capability (minimum 85mA)
• On-state resistance (maximum 35 Ohms)

Substitute parts may exceed the specified load current and on-state resistance performance without affecting compatibility. Parts with identical or superior electrical ratings within the same package footprint are considered direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

LCA210S (Littelfuse) is the primary direct substitute for the LCA211S. This part maintains identical electrical specifications and package footprint while offering active product status and ROHS3 compliance. The LCA210S is manufactured under the same OptoMOS® series designation and provides equivalent performance for all specified load conditions.

AQW210EHA (Panasonic Electric Works) is a compatible substitute with enhanced electrical performance. This PhotoMOS™ AQW series component provides superior load current capability (120mA versus 85mA) and reduced on-state resistance (25 Ohms versus 35 Ohms). The input control voltage is marginally lower (1.14VDC versus 1.2VDC), which remains within acceptable operating margins. This part is ROHS3 compliant and maintains active product status.

AQW610EHA (Panasonic Electric Works) is a functional alternative with extended circuit capability. This part combines SPST-NO and SPST-NC (Form A and Form B) switching in a single 8-SMD package, providing both normally-open and normally-closed relay functions. Electrical ratings match the AQW210EHA. This configuration is suitable only for applications requiring dual-polarity switching capability within the same footprint.

All substitute parts are ROHS3 compliant and maintain active manufacturing status, ensuring long-term supply chain availability compared to the obsolete LCA211S.

Frequently Asked Questions (FAQ)

Q: Can the LCA210S be used as a direct replacement for the LCA211S without circuit modification?

A: Yes. The LCA210S maintains identical electrical specifications, package footprint, and gull wing termination. No circuit modifications are required for direct substitution.

Q: What are the advantages of using AQW210EHA instead of LCA210S?

A: The AQW210EHA provides higher load current capability (120mA versus 85mA) and lower on-state resistance (25 Ohms versus 35 Ohms). These enhanced ratings reduce power dissipation and allow operation with higher load currents. The input control voltage (1.14VDC) is compatible with standard 1.2VDC control circuits.

Q: Is the AQW610EHA suitable for applications requiring only SPST-NO switching?

A: Yes. The AQW610EHA contains dual switching elements (SPST-NO and SPST-NC) within the same 8-SMD package. Applications requiring only SPST-NO functionality can utilize one switching element while leaving the SPST-NC element unused. The part maintains identical load voltage and current ratings as the AQW210EHA.

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

A: Yes. All substitute parts use the 8-SMD (0.300", 7.62mm) package with gull wing termination. PCB footprints designed for the LCA211S are compatible with LCA210S, AQW210EHA, and AQW610EHA without modification.

Q: What is the impact of the lower input control voltage in Panasonic parts (1.14VDC versus 1.2VDC)?

A: The lower input voltage specification in AQW210EHA and AQW610EHA represents improved sensitivity. These parts will operate reliably with 1.2VDC control signals. The 0.06VDC difference does not affect circuit compatibility or performance in standard applications.

Q: Why would I choose AQW610EHA over AQW210EHA if both have identical load ratings?

A: The AQW610EHA is selected only when the application requires both normally-open and normally-closed relay functions within a single component. For applications requiring only SPST-NO switching, the AQW210EHA is the appropriate choice.