LCA127LS Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LCA127LS is an active SPST-NO (Single Pole Single Throw - Normally Open) solid state relay manufactured by IXYS Integrated Circuits Division. This surface mount component operates as a 1 Form A relay with AC/DC output capability, designed for applications requiring switching loads up to 250V at 170mA. The device is housed in a 6-SMD package with gull wing termination and maintains an on-state resistance of 15 Ohms maximum.

Finding equivalent substitute parts becomes necessary when managing inventory constraints, ensuring supply chain continuity, or optimizing procurement across multiple suppliers while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

LCA127LS

IXYS Integrated Circuits DivisionIn Stock: 2150LCA127LS Datasheet

Current PartRFQ

LH1510AAB

Vishay Semiconductor Opto DivisionIn Stock: 1470LH1510AAB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LCA127LS is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO (1 Form A)
• Package type: 6-SMD (0.300", 7.62mm)
• Termination style: Gull Wing
• Mounting type: Surface Mount
• Output type: AC, DC capability
• On-state resistance: 15 Ohms maximum

Allowable Parameter Variations:

• Input voltage: Within compatible control signal ranges
• Load voltage rating: Equal to or greater than 250V
• Load current capacity: Equal to or greater than 170mA
• Compliance certifications: ROHS3 and equivalent standards

The LH1510AAB from Vishay Semiconductor Opto Division qualifies as a direct substitute based on matching package geometry, circuit topology, termination style, and compliance requirements. While the LH1510AAB exhibits slightly higher load current capacity (200mA) and input voltage specification (1.27VDC), these parameters remain within acceptable substitution tolerances for the intended application.

Parameter Comparison

Engineering Selection Recommendations

Both the LCA127LS and LH1510AAB maintain Active product status with full ROHS3 compliance and REACH unaffected designation. Selection between these components should be based on:

LCA127LS (IXYS): Primary selection when IXYS supply chain integration is preferred or when load voltage requirements approach the 250V maximum specification.

LH1510AAB (Vishay): Suitable alternative when Vishay supplier relationships are established or when load current capacity margin is required. Note that the maximum load voltage specification is 200V, which is 50V lower than the LCA127LS. This component is appropriate only for applications where the load voltage does not exceed 200V.

Both components share identical on-state resistance characteristics, package geometry, and termination style, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the LH1510AAB replace the LCA127LS in all applications?

A: The LH1510AAB is compatible with applications where the load voltage does not exceed 200V. If your application requires switching loads above 200V up to 250V, the LCA127LS is the required component. Both devices are otherwise electrically and mechanically equivalent.

Q: Are there any PCB layout considerations when substituting between these parts?

A: No. Both components use identical 6-SMD (0.300", 7.62mm) package geometry with gull wing termination. PCB footprints are directly interchangeable without modification.

Q: Do both parts require the same control signal voltage?

A: Both components operate with input voltages in the 1.2V to 1.27V range. Standard control signal conditioning for either component is identical.

Q: What is the significance of the higher load current rating on the LH1510AAB?

A: The LH1510AAB's 200mA rating exceeds the LCA127LS requirement of 170mA. This provides additional current margin but does not affect substitution compatibility. The component will operate identically at 170mA load current.

Q: Are moisture sensitivity and compliance certifications identical?

A: Yes. Both components carry MSL Level 1 (Unlimited) rating, ROHS3 compliance, and REACH unaffected status, ensuring equivalent handling and regulatory requirements.