PLA140S Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PLA140S is an active SPST-NO (Single Pole Single Throw - Normally Open) solid state relay manufactured by IXYS Integrated Circuits Division. This OptoMOS® series component operates as a 1 Form A relay with AC/DC output capability, rated for 250 mA load current across 0-400V. The device is packaged in a 6-SMD (0.300", 7.62mm) surface mount configuration with gull wing termination.

The PLA140S maintains active product status with 1361 units in current inventory. ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1) ensure suitability for standard industrial and commercial applications. Equivalent substitute parts are available from Broadcom Limited within the ASSR series, offering alternative electrical characteristics for specific application requirements.

Substiute Parts

PLA140S

IXYS Integrated Circuits DivisionIn Stock: 1399PLA140S Datasheet

Current PartRFQ

ASSR-4111-501E

Broadcom LimitedIn Stock: 2926ASSR-4111-501E Datasheet

MFR RecommendedRFQ

ASSR-4119-501E

Broadcom LimitedIn Stock: 5917ASSR-4119-501E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PLA140S is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Circuit Configuration: SPST-NO (1 Form A)
• Output Type: AC, DC
• Voltage - Load: 0 V ~ 400 V
• Package / Case: 6-SMD (0.300", 7.62mm)
• Termination Style: Gull Wing
• Mounting Type: Surface Mount

Variable Parameters (Application-Dependent):

• Voltage - Input: 1.2 VDC (main part) vs. 1.3 VDC (substitutes)
• Load Current: 250 mA (main part) vs. 120 mA or 100 mA (substitutes)
• On-State Resistance (Max): 8 Ohms (main part) vs. 25 Ohms or 35 Ohms (substitutes)

The ASSR-4111-501E and ASSR-4119-501E from Broadcom Limited maintain identical mechanical packaging, electrical load range, and circuit topology. Substitution is valid when application load current requirements do not exceed the substitute part's rated capacity and when input voltage tolerance of 1.3 VDC is acceptable for the control circuit.

Parameter Comparison

Engineering Selection Recommendations

All three components maintain active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory alignment for industrial applications.

PLA140S Selection: Primary choice when load current requirements reach 250 mA and on-state resistance must remain below 10 Ohms. Input voltage specification of 1.2 VDC applies to control circuit design.

ASSR-4111-501E Selection: Suitable for applications with maximum load current of 120 mA. Higher on-state resistance of 25 Ohms results in increased power dissipation compared to the main part. Input voltage tolerance of 1.3 VDC must be accommodated in control circuit design.

ASSR-4119-501E Selection: Applicable to applications with maximum load current of 100 mA. On-state resistance of 35 Ohms represents the highest dissipation among the three options. Input voltage specification of 1.3 VDC applies to control circuit requirements.

Component selection depends on actual application load current and acceptable on-state resistance values. All three parts share identical mechanical packaging and load voltage range, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can ASSR-4111-501E or ASSR-4119-501E be used as direct replacements for PLA140S?

A: Direct replacement is valid only when application load current does not exceed 120 mA (ASSR-4111-501E) or 100 mA (ASSR-4119-501E). The PLA140S supports 250 mA, so substitution is not appropriate for higher-current applications. Input voltage tolerance must shift from 1.2 VDC to 1.3 VDC in the control circuit.

Q: Are there mechanical compatibility concerns between these parts?

A: No. All three components share identical 6-SMD (0.300", 7.62mm) packaging with gull wing termination. PCB footprints are mechanically interchangeable.

Q: How does on-state resistance affect component selection?

A: On-state resistance determines power dissipation across the relay output. PLA140S at 8 Ohms maximum dissipates less power than ASSR-4111-501E (25 Ohms) or ASSR-4119-501E (35 Ohms) at equivalent load currents. Applications with thermal constraints may require the lower resistance option.

Q: What is the significance of input voltage differences (1.2 VDC vs. 1.3 VDC)?

A: Input voltage specification defines the control circuit requirements. The 0.1 VDC difference between PLA140S and ASSR series components must be accommodated in driver circuit design to ensure reliable relay activation.

Q: Can load current be the only selection criterion?

A: Load current is the primary limiting factor. However, on-state resistance and input voltage specifications must also align with application requirements. All three parameters must be evaluated together for proper component selection.