PS7241-1B Equivalent and Substitute Parts

Part Overview

The PS7241-1B is a Solid State SPST-NC (1 Form B) relay manufactured by CEL, designed for switching applications with a load capacity of 120 mA across 0–400 V AC/DC. The device features a 4-SOP package with gull wing termination and operates with a 1.2 VDC input trigger voltage. The PS7241-1B is classified as obsolete; equivalent substitute parts are necessary to maintain system continuity and enable new designs where the original component is no longer manufactured or available.

Substiute Parts

PS7241-1B

CELIn Stock: 2528PS7241-1B Datasheet

Current PartRFQ

AQV414S

Panasonic Electric WorksIn Stock: 1564AQV414S Datasheet

SimilarRFQ

AQY414S

Panasonic Electric WorksIn Stock: 5974AQY414S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS7241-1B are selected based on the following critical electrical and mechanical parameters:

• Circuit Configuration: SPST-NC (1 Form B) architecture must be maintained for functional equivalence.
• Voltage Specifications: Load voltage range (0–400 V AC/DC) must be met or exceeded; input trigger voltage must be compatible or lower.
• Load Current: Substitute parts must support the required 120 mA load current or higher.
• On-State Resistance: Maximum on-state resistance determines switching efficiency; lower values are preferred but not mandatory for substitution.
• Package and Termination: Physical form factor (4-SOP or 6-SOP) and gull wing termination ensure mechanical and electrical compatibility with existing circuit board layouts.

The identified substitute parts—AQY414S (Panasonic Electric Works) and AQV414S (Panasonic Electric Works)—meet these core parameters with load current ratings of 100 mA and on-state resistance values of 35 Ohms (AQY414S) and 50 Ohms (AQV414S). Both substitute parts operate at 1.14 VDC input, which is compatible with or lower than the PS7241-1B input specification.

Parameter Comparison

Engineering Selection Recommendations

AQY414S (Panasonic Electric Works) is the preferred substitute for the PS7241-1B in new designs and replacement applications. This part maintains identical package form factor (4-SOP), features ROHS3 compliance, and is currently active in production. The load current specification of 100 mA is lower than the PS7241-1B requirement of 120 mA; therefore, AQY414S is suitable for applications where the actual load current demand is within 100 mA or where circuit design accommodates a reduced margin.

AQV414S (Panasonic Electric Works) serves as an alternative substitute, offering ROHS3 compliance and active product status. The 6-SOP package requires circuit board layout modifications compared to the original 4-SOP configuration. Load current and on-state resistance specifications are identical to AQY414S, with the same 100 mA load current limit applicable.

Both substitute parts operate at 1.14 VDC input and maintain full compatibility with the 0–400 V load voltage range. Selection between AQY414S and AQV414S depends on physical space constraints and existing PCB routing: AQY414S is recommended where board layout accommodates 4-SOP footprints, while AQV414S serves applications where the slightly larger 6-SOP package is permissible or necessary.

Frequently Asked Questions (FAQ)

Q: Can AQY414S or AQV414S directly replace PS7241-1B without circuit modifications?

A: AQY414S provides direct footprint compatibility (4-SOP) and requires no circuit board modifications. Both substitute parts are electrically compatible with the load voltage range and input signal specifications. However, the reduced load current specification (100 mA vs. 120 mA) must be evaluated in the context of actual circuit load requirements.

Q: What is the impact of the lower load current rating (100 mA) in the substitute parts?

A: The substitute parts are rated for 100 mA maximum load current compared to 120 mA for the PS7241-1B. In applications where load current remains below 100 mA, operation is equivalent. For designs requiring load currents between 100–120 mA, thermal analysis and circuit margin evaluation are necessary to determine substitutability.

Q: How do the on-state resistance differences affect system performance?

A: On-state resistance affects power dissipation and voltage drop across the switching element. The PS7241-1B specifies 30 Ohms maximum, while AQY414S offers 35 Ohms and AQV414S offers 50 Ohms. These differences result in proportionally higher dissipation in the substitute parts; circuit-level evaluation of power budgets and thermal considerations is necessary for applications sensitive to switching losses.

Q: Is AQV414S suitable as a substitute if PCB layout requires a different package size?

A: Yes. AQV414S features a 6-SOP package and maintains all electrical specifications required for substitution. PCB redesign is necessary to accommodate the larger footprint; however, electrical functionality remains equivalent.

Q: What are the compliance differences between the original and substitute parts?

A: The PS7241-1B is RoHS non-compliant and does not carry REACH Unaffected designation. Both AQY414S and AQV414S are ROHS3 compliant and REACH Unaffected, making them suitable for applications with environmental and regulatory compliance requirements.

Q: What is the difference between PhotoMOS™ AQY and PhotoMOS™ AQV series designations?

A: Both AQY and AQV are series designations within the Panasonic PhotoMOS™ product line. The primary difference is package configuration: AQY414S uses 4-SOP while AQV414S uses 6-SOP. Electrical specifications and functional behavior are equivalent between the two series for this application.