PS7141L-2B Equivalent & Substitute Parts

Part Overview

The PS7141L-2B is a solid-state relay (SSR) manufactured by CEL, configured as a SPST-NC (Single-Pole Single-Throw Normally Closed) relay with dual channels in an 8-SMD surface mount package. This device operates across AC and DC loads with a maximum load voltage of 400V and supports a 150mA load current. The PS7141L-2B is currently obsolete, necessitating identification of functionally compatible substitute components that maintain electrical and mechanical compatibility with existing designs.

Substiute Parts

PS7141L-2B

CELIn Stock: 2240PS7141L-2B Datasheet

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AQW254A

Panasonic Electric WorksIn Stock: 1195AQW254A Datasheet

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AQW414A

Panasonic Electric WorksIn Stock: 1698AQW414A Datasheet

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AQW414EHA

Panasonic Electric WorksIn Stock: 2081AQW414EHA Datasheet

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AQW454A

Panasonic Electric WorksIn Stock: 3692AQW454A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute selection for the PS7141L-2B is determined by the following critical parameters:

Mechanical Compatibility:

• Package/Case type: 8-SMD (0.300", 7.62mm)
• Termination style: Gull Wing
• Mounting type: Surface Mount

Electrical Compatibility:

• Circuit configuration: SPST-NC (1 Form B) x 2 (or functionally equivalent configurations)
• Load voltage range: 0V ~ 400V
• Output type: AC, DC support
• Load current capability: minimum 150mA or greater

Compliance & Status:

• Substitute parts with active product status are preferred over obsolete components
• RoHS3 compliance recommended for modern designs

The substitute parts listed below maintain the same package footprint, pinout compatibility, and load voltage specifications as the primary part. Differences in load current capacity, on-state resistance, and input voltage represent acceptable variations within the allowed electrical parameter range.

Parameter Comparison

Engineering Selection Recommendations

For SPST-NC Applications:

The AQW414A, AQW414EHA, and AQW454A are direct circuit-function equivalents to the PS7141L-2B, maintaining the SPST-NC (1 Form B) configuration. All three parts meet the load voltage specification of 0V ~ 400V and provide compatible footprints. The AQW414EHA offers intermediate on-state resistance (35 Ohms) compared to the original specification (30 Ohms maximum). The AQW454A provides the highest load current capability (120mA) among the SPST-NC substitutes, with the lowest on-state resistance (16 Ohms), making it suitable for applications requiring lower switching losses. All substitute parts maintain active product status and comply with ROHS3 requirements, providing superior long-term availability and regulatory compliance compared to the obsolete PS7141L-2B.

For Load Current Derating:

Applications tolerating reduced load current (below 150mA) may select AQW414A or AQW414EHA, each rated for 100mA. The AQW414A presents higher on-state resistance (50 Ohms maximum) and is appropriate for circuits where resistance variation can be accommodated. The AQW414EHA provides improved resistance characteristics (35 Ohms maximum) within the same 100mA load current rating.

For Applications Requiring SPST-NO Configuration:

The AQW254A functions as a SPST-NO (1 Form A) substitute, suitable only for circuits where the normally-open configuration is functionally equivalent to the original normally-closed design. This part delivers 120mA load current with 16 Ohms maximum on-state resistance and maintains full voltage compatibility across the 0V ~ 400V load range.

Frequently Asked Questions (FAQ)

Q: Can AQW254A substitute for PS7141L-2B in all applications?

A: AQW254A is compatible only in circuits where the normally-open (Form A) configuration serves the same function as the original normally-closed (Form B) configuration. Load voltage, current capacity, and package footprint are compatible, but circuit logic and safety interlocking requirements determine actual suitability.

Q: Which substitute provides the best on-state resistance match to PS7141L-2B?

A: AQW254A and AQW454A both offer 16 Ohms maximum on-state resistance, compared to the original 30 Ohms specification. AQW414EHA provides 35 Ohms, the closest match among SPST-NC options. Lower on-state resistance reduces power dissipation and switching losses.

Q: Are the package footprints identical between PS7141L-2B and all substitute parts?

A: All listed substitutes employ the same 8-SMD (0.300", 7.62mm) package with gull wing termination style, ensuring PCB layout compatibility without redesign.

Q: What is the impact of reduced load current ratings in AQW414A and AQW414EHA?

A: These parts are rated for 100mA, compared to the original 150mA specification. They function appropriately in circuits drawing loads below 100mA. Circuits requiring sustained currents above 100mA must employ AQW454A (120mA) or operate the original design at derated conditions.

Q: How does input voltage affect substitution?

A: All substitute parts require 1.14VDC input, compared to 1.2VDC for PS7141L-2B. This 0.06VDC reduction represents a 5% decrease in input voltage requirement, typically accommodated by standard supply tolerances in control circuits.

Q: Do all substitutes support both AC and DC loads?

A: Yes. All listed substitute parts (AQW254A, AQW414A, AQW414EHA, AQW454A) are rated for AC and DC load output, matching the original PS7141L-2B capability.