PLA150S Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PLA150S is an IXYS OptoMOS® solid state relay (SSR) configured as a SPST-NO (Single Pole Single Throw - Normally Open) switching device. This surface mount component operates with a 1.2VDC input signal and controls AC or DC loads up to 250V at 250mA maximum current. The device is housed in a 6-SMD package with gull wing termination and is currently in active production status with ROHS3 compliance.

Equivalent and substitute parts are identified when component availability is limited, procurement lead times are extended, or design flexibility is required while maintaining functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

PLA150S

IXYS Integrated Circuits DivisionIn Stock: 982PLA150S Datasheet

Current PartRFQ

PLA150STR

IXYS Integrated Circuits DivisionIn Stock: 3785PLA150STR Datasheet

DirectRFQ

ASSR-3211-501E

Broadcom LimitedIn Stock: 1035ASSR-3211-501E Datasheet

MFR RecommendedRFQ

LH1510AAB

Vishay Semiconductor Opto DivisionIn Stock: 1470LH1510AAB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PLA150S is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Package / Case: Must be 6-SMD (0.300", 7.62mm) with gull wing termination
• Mounting Type: Must be surface mount
• Output Type: Must support AC and DC loads
• Load Voltage Range: Must accommodate 0 V ~ 250 V operation
• Load Current: Must support minimum 250 mA (or lower if application permits)
• Input Voltage: Must operate at or near 1.2VDC control signal
• On-State Resistance: Lower values indicate better performance; higher values acceptable if load current requirements are reduced
• Compliance: Must maintain ROHS3 compliance and equivalent regulatory status

Substitute parts are grouped into two categories: direct equivalents (identical packaging and specifications) and functional alternatives (same circuit configuration and package but with modified electrical parameters within acceptable operating ranges).

Parameter Comparison

Engineering Selection Recommendations

PLA150STR (IXYS Integrated Circuits Division) is the primary direct equivalent to PLA150S. Both parts share identical electrical specifications, package configuration, and termination style. The only difference is packaging format: PLA150S is supplied in tube packaging, while PLA150STR is supplied in tape and reel format. Both maintain active product status and ROHS3 compliance. Selection between these two depends solely on procurement and assembly requirements.

ASSR-3211-501E (Broadcom Limited) is a functional alternative with the following considerations: Load current is reduced to 200mA (versus 250mA), on-state resistance is increased to 10 Ohms (versus 7 Ohms), and input voltage is 1.3VDC (versus 1.2VDC). The product status is listed as obsolete, which may impact long-term availability and support. This part is suitable only for applications where the 200mA load current limitation is acceptable and where the higher on-state resistance does not create thermal or performance issues.

LH1510AAB (Vishay Semiconductor Opto Division) is a functional alternative with the following considerations: Load current is reduced to 200mA, load voltage range is limited to 0 V ~ 200 V (versus 0 V ~ 250 V), on-state resistance is increased to 15 Ohms (versus 7 Ohms), and input voltage is 1.27VDC (versus 1.2VDC). The product maintains active status and ROHS3 compliance. This part is suitable only for applications operating below 200V load voltage and where the 200mA current and 15 Ohm resistance specifications are compatible with circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can PLA150STR be used as a direct replacement for PLA150S?

A: Yes. PLA150STR is a direct electrical and mechanical equivalent. The parts differ only in packaging format (tube versus tape and reel). Both maintain identical electrical specifications, the same 6-SMD gull wing package, and equivalent compliance certifications. Selection depends on procurement and assembly line requirements.

Q: What are the limitations when substituting ASSR-3211-501E for PLA150S?

A: ASSR-3211-501E has three parameter differences: maximum load current is 200mA (not 250mA), on-state resistance is 10 Ohms (not 7 Ohms), and input voltage is 1.3VDC (not 1.2VDC). The product is also listed as obsolete. Substitution is valid only if the application load current does not exceed 200mA and the higher on-state resistance is acceptable for thermal and performance requirements.

Q: What are the limitations when substituting LH1510AAB for PLA150S?

A: LH1510AAB has four parameter differences: maximum load voltage is 200V (not 250V), maximum load current is 200mA (not 250mA), on-state resistance is 15 Ohms (not 7 Ohms), and input voltage is 1.27VDC (not 1.2VDC). Substitution is valid only if the application operates at load voltages below 200V, load current does not exceed 200mA, and the significantly higher on-state resistance is compatible with circuit design.

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

A: Yes. All listed substitute parts use the 6-SMD (0.300", 7.62mm) package with gull wing termination. PCB footprints are mechanically compatible across all four parts.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. All parts listed are ROHS3 compliant, have MSL rating of 1 (Unlimited), and share equivalent REACH and ECCN classifications. Regulatory compliance is maintained across all substitutions.

Q: Which substitute part should be selected for new designs?

A: For new designs, PLA150STR is the recommended choice as it maintains identical electrical specifications to PLA150S and active product status. ASSR-3211-501E should be avoided due to obsolete status. LH1510AAB may be considered only if design constraints permit the reduced voltage and current ratings.