LCA120LS Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LCA120LS is an active SPST-NO (1 Form A) solid state relay manufactured by IXYS Integrated Circuits Division, part of the OptoMOS® series. This surface mount component operates with a 1.2VDC input and handles loads up to 250V AC/DC at 150mA maximum current. The device is packaged in a 6-SMD (0.300", 7.62mm) configuration with gull wing termination, suitable for applications requiring compact relay switching without mechanical contacts.

Finding equivalent or substitute parts becomes necessary when managing inventory constraints, addressing supply chain disruptions, or optimizing component selection across production batches while maintaining functional compatibility.

Substiute Parts

LCA120LS

IXYS Integrated Circuits DivisionIn Stock: 2172LCA120LS Datasheet

Current PartRFQ

LH1510AAB

Vishay Semiconductor Opto DivisionIn Stock: 1470LH1510AAB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LCA120LS is determined by strict alignment of the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching logic
• Package Type: Must be 6-SMD (0.300", 7.62mm) with gull wing termination for PCB compatibility
• Mounting Method: Must be surface mount to ensure assembly process compatibility
• Output Type: Must support both AC and DC loads
• Load Voltage Capability: Substitute must handle the required voltage range without exceeding component ratings
• Load Current Capability: Substitute must meet or exceed the 150mA requirement
• Input Voltage: Must be compatible with the control circuit voltage (1.2VDC nominal)
• Compliance Standards: Must maintain ROHS3 compliance and equivalent environmental certifications

The LH1510AAB from Vishay Semiconductor Opto Division meets these substitution criteria within the allowed parameter tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both the LCA120LS and LH1510AAB are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring long-term availability and environmental regulatory alignment.

The LH1510AAB demonstrates improved electrical performance characteristics: higher load current capability (200mA vs. 150mA) and lower on-state resistance (15 Ohms vs. 20 Ohms). The input voltage differential (1.27VDC vs. 1.2VDC) is within typical control circuit tolerances.

The primary design consideration is the load voltage range: the LCA120LS supports 0V ~ 250V while the LH1510AAB supports 0V ~ 200V. Applications requiring switching above 200V must use the LCA120LS. For applications operating within 0V ~ 200V, the LH1510AAB is functionally equivalent with superior current handling and lower resistance characteristics.

Both components share identical package geometry, termination style, and mounting method, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the LH1510AAB replace the LCA120LS in all applications?

A: The LH1510AAB is functionally equivalent for applications where the load voltage does not exceed 200V. If your circuit requires switching voltages above 200V, the LCA120LS must be used. Both components are pin-compatible and share identical package dimensions.

Q: What is the significance of the on-state resistance difference?

A: The LH1510AAB has lower on-state resistance (15 Ohms vs. 20 Ohms), resulting in reduced power dissipation during switching. This can improve thermal performance in high-frequency or continuous-duty applications.

Q: Are there input voltage compatibility concerns?

A: The input voltage specifications (1.2VDC vs. 1.27VDC) represent nominal operating points. Both components are designed for control circuits operating in this voltage range. Standard control circuit tolerances accommodate this 0.07VDC difference.

Q: Do these components require different PCB layout considerations?

A: No. Both components use identical 6-SMD (0.300", 7.62mm) packaging with gull wing termination. PCB footprints, trace routing, and assembly processes are directly compatible.

Q: What compliance certifications apply to both parts?

A: Both the LCA120LS and LH1510AAB are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity). Both are classified under ECCN EAR99 and HTSUS 8536.41.0030.

Q: How do I determine which part to select for my application?

A: Evaluate your maximum load voltage requirement. If it exceeds 200V, use the LCA120LS. If your application operates at 200V or below, either component is suitable; the LH1510AAB offers improved current handling and lower resistance characteristics.