PS7241-1A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7241-1A is a Solid State SPST-NO (Single Pole Single Throw - Normally Open) relay manufactured by CEL in a 4-SOP package. This surface-mount component is rated for 120 mA load current at 0-400V output voltage with a 1.2VDC input trigger voltage. The product is obsolete, which necessitates identification of active alternative components with compatible electrical and mechanical specifications for design continuity and procurement purposes.

Substiute Parts

PS7241-1A

CELIn Stock: 1314PS7241-1A Datasheet

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AQV210S

Panasonic Electric WorksIn Stock: 3107AQV210S Datasheet

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AQV214S

Panasonic Electric WorksIn Stock: 4535AQV214S Datasheet

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AQV217S

Panasonic Electric WorksIn Stock: 53761AQV217S Datasheet

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AQV224NS

Panasonic Electric WorksIn Stock: 1449AQV224NS Datasheet

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AQV227NS

Panasonic Electric WorksIn Stock: 3439AQV227NS Datasheet

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AQY210S

Panasonic Electric WorksIn Stock: 16871AQY210S Datasheet

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AQY214S

Panasonic Electric WorksIn Stock: 10337AQY214S Datasheet

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CPC1030N

IXYS Integrated Circuits DivisionIn Stock: 3586CPC1030N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete PS7241-1A is determined by equivalence in the following critical parameters:

• Circuit Configuration: SPST-NO (1 Form A) topology for identical switching function
• Load Voltage Range: Minimum 0-400V capability to support the original specification
• Load Current Rating: Minimum 120 mA at rated voltage
• Input Trigger Voltage: Compatibility within 1.2VDC ±tolerance range
• On-State Resistance: Maximum 30 Ohms to maintain electrical performance
• Package Form Factor: 4-SOP or 6-SOP surface-mount packages with equivalent footprints
• Mounting Type: Surface mount with gull wing termination

Substitute parts are categorized into two groups based on package compatibility: those maintaining the identical 4-SOP footprint (AQY210S, AQY214S, CPC1030N) and those in compatible 6-SOP packages (AQV210S, AQV214S, AQV217S, AQV224NS, AQV227NS). Within these groups, substitutes are further differentiated by their specific load current and voltage ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Closest Match): CPC1030N is the optimal replacement, providing identical input voltage (1.2VDC), load current (120 mA), and on-state resistance (30 Ohms) specifications. The component is ROHS3 compliant and actively manufactured. Package dimensions differ slightly (0.150" vs 0.173"), requiring board layout verification for footprint compatibility.

Secondary Substitutes for 4-SOP Footprint Compatibility: AQY210S and AQY214S are active Panasonic PhotoMOS™ relays in the identical 4-SOP form factor with ROHS3 compliance. AQY210S matches the 120 mA load current rating but is limited to 0-350V operation; AQY214S supports full 0-400V but with reduced 100 mA current capacity.

6-SOP Package Alternatives: AQV210S, AQV214S, AQV217S, AQV224NS, and AQV227NS are ROHS3-compliant Panasonic PhotoMOS™ relays suitable where package footprint transition is acceptable. Selection among these depends on specific load voltage and current requirements within the application circuit.

Compliance Advantage: All substitute options provide ROHS3 compliance compared to the obsolete PS7241-1A's RoHS non-compliant status, supporting modern procurement and manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can AQY210S directly replace PS7241-1A without circuit modification? A: AQY210S is compatible for 120 mA applications at voltages up to 350V. If the application operates exclusively within 0-350V, direct substitution is suitable. Applications requiring the full 0-400V range require CPC1030N or AQY214S evaluation.

Q: What is the impact of the CPC1030N package dimension difference? A: CPC1030N uses a 4-SOP package with 0.150" dimensions versus PS7241-1A's 0.173" specification. PCB footprint compatibility must be verified; pad spacing and pin pitch differences may require layout adjustment.

Q: Which substitute provides the best thermal and electrical performance? A: AQY210S offers the lowest on-state resistance (25 Ohms) among the 120 mA options, reducing heat generation and voltage drop. CPC1030N maintains 30 Ohms resistance matching the original specification.

Q: Are 6-SOP package substitutes fully compatible with designs expecting 4-SOP? A: 6-SOP devices occupy different board space and pin count. Direct PCB substitution is not possible without layout revision. Pin configuration and lead spacing differ between 4-SOP and 6-SOP form factors.

Q: How do load current ratings affect substitute selection? A: The PS7241-1A is rated for 120 mA maximum load. Substitutes with lower ratings (AQV224NS at 40 mA, AQV227NS at 50 mA) are suitable only for applications drawing less than their specified current. Substitutes with higher ratings (AQV217S at 160 mA) are suitable for the original 120 mA application.

Q: What is the significance of input voltage differences between substitutes? A: Most substitutes operate at 1.14VDC input versus PS7241-1A's 1.2VDC. This 50 mV difference is within typical circuit trigger tolerances. CPC1030N exactly matches the 1.2VDC specification.

Q: Are all substitute options RoHS compliant? A: All listed substitutes are ROHS3 compliant. The original PS7241-1A is non-compliant, making RoHS3-rated substitutes advantageous for applications requiring modern compliance standards.