PS7142L-2A-A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7142L-2A-A is a solid state relay (SSR) manufactured by CEL, configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with dual channels in an 8-SMD surface mount package. This component is designed for switching applications requiring 0-400V load voltage with a maximum load current of 200 mA and operates with a 1.2VDC input signal. The product is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

PS7142L-2A-A

CELIn Stock: 1053PS7142L-2A-A Datasheet

Current PartRFQ

AQW254A

Panasonic Electric WorksIn Stock: 1195AQW254A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS7142L-2A-A is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO (1 Form A) x 2 dual-channel architecture
• Package type: 8-SMD (0.300", 7.62mm) with Gull Wing termination
• Output type: AC and DC switching capability
• Load voltage range: 0 V ~ 400 V
• Mounting type: Surface Mount

Allowable Parameter Variations:

• Load current: Substitute must support minimum 200 mA (equal or greater)
• Input voltage: Substitute must operate within specified input range
• On-state resistance: Substitute specifications must be documented
• Product status: Active status preferred for long-term availability

The AQW254A from Panasonic Electric Works meets all mandatory matching parameters while maintaining functional equivalence within the specified electrical operating range.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AQW254A

The AQW254A is the designated equivalent substitute for the obsolete PS7142L-2A-A based on the following engineering criteria:

Functional Equivalence:

• Identical dual-channel SPST-NO configuration
• Matching 8-SMD package footprint and Gull Wing termination
• Identical load voltage range (0-400V AC/DC)
• Compatible input voltage specification (1.14VDC vs. 1.2VDC)

Compliance and Availability:

• Active product status ensures long-term supply continuity
• ROHS3 compliant, addressing modern regulatory requirements
• REACH unaffected status provides improved environmental compliance compared to the original part
• Established manufacturer (Panasonic Electric Works) with documented product support

Application Considerations:

• Load current rating of 120 mA is lower than the original 200 mA specification
• On-state resistance of 16 Ohms is higher than the original 10 Ohms maximum
• These parameter differences require circuit-level evaluation to confirm suitability for specific load conditions

Frequently Asked Questions (FAQ)

Q: Can the AQW254A directly replace the PS7142L-2A-A without PCB modifications?

A: Yes, the AQW254A shares identical package dimensions (8-SMD, 0.300" / 7.62mm), footprint, and Gull Wing termination. Direct PCB substitution is possible without layout changes.

Q: What are the key electrical differences between these parts?

A: The AQW254A has a lower maximum load current rating (120 mA vs. 200 mA) and higher on-state resistance (16 Ohms vs. 10 Ohms maximum). Applications operating near the 200 mA limit require verification that 120 mA is sufficient. The higher on-state resistance may result in slightly increased voltage drop across the relay contacts.

Q: Is the AQW254A suitable for both AC and DC load switching?

A: Yes, the AQW254A supports both AC and DC output types across the 0-400V load voltage range, matching the original PS7142L-2A-A capability.

Q: What is the significance of the REACH compliance difference?

A: The original PS7142L-2A-A is REACH Affected, indicating it may contain substances of concern. The AQW254A is REACH Unaffected, providing improved environmental and regulatory compliance for new designs and long-term supply security.

Q: Are there any moisture sensitivity considerations for the AQW254A?

A: The AQW254A has no MSL (Moisture Sensitivity Level) restriction, whereas the original part specifies MSL 1 (Unlimited). This represents an improvement in handling and storage flexibility.

Q: What input voltage range does the AQW254A require?

A: The AQW254A operates with a 1.14VDC input specification, compared to 1.2VDC for the original part. This minor difference is within typical circuit tolerance and does not present compatibility issues.

Q: Is the AQW254A available in the same packaging format?

A: The AQW254A is supplied in Tube packaging, whereas the original inventory status does not specify packaging format. Both parts use identical 8-SMD component packaging for PCB assembly.