PS7241E-1A-A Solid State Relay: Equivalent & Substitute Parts

Part Overview

The PS7241E-1A-A is a Surface Mount Solid State Relay (SSR) manufactured by CEL, configured as a SPST-NO (1 Form A) device in a 4-SOP package. This component operates with a 1.2VDC input signal and controls AC/DC loads up to 400V at 120mA maximum current. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

PS7241E-1A-A

CELIn Stock: 831PS7241E-1A-A Datasheet

Current PartRFQ

AQY214S

Panasonic Electric WorksIn Stock: 10337AQY214S Datasheet

SimilarRFQ

ASSR-4110-003E

Broadcom LimitedIn Stock: 2085ASSR-4110-003E Datasheet

SimilarRFQ

TLP176GA(F)

Toshiba Semiconductor and StorageIn Stock: 960TLP176GA(F) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS7241E-1A-A is determined by strict alignment with 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: 4-SOP (0.173", 4.40mm)
• Termination Style: Gull Wing
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Voltage - Input: 1.2VDC ±0.15V acceptable range
• Load Current: 120mA nominal; 100mA minimum acceptable
• On-State Resistance (Max): 35 Ohms maximum; lower values acceptable

All three substitute parts meet these criteria and are classified as active products, providing long-term availability advantages over the obsolete PS7241E-1A-A.

Parameter Comparison

Engineering Selection Recommendations

ASSR-4110-003E (Broadcom Limited) is the primary substitute for the PS7241E-1A-A. This part matches all mandatory parameters exactly, maintains 120mA load current capacity, and provides superior on-state resistance (25 Ohms vs. 35 Ohms). The ASSR-4110-003E is active status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory compliance and long-term supply availability.

TLP176GA(F) (Toshiba Semiconductor and Storage) is a secondary substitute. It matches all mandatory parameters with identical load current (120mA) and on-state resistance (35 Ohms). The TLP176GA(F) is active status with RoHS compliance. Note: Package designation differs slightly (4-SMD vs. 4-SOP) but maintains identical physical dimensions and gull wing termination.

AQY214S (Panasonic Electric Works) is a tertiary substitute. This part meets all mandatory parameters but operates at reduced load current (100mA vs. 120mA). The AQY214S is active status with ROHS3 compliance and REACH unaffected designation. Selection of this part requires verification that the 100mA load current rating is acceptable for the application.

All three substitutes are active products with superior availability compared to the obsolete PS7241E-1A-A.

Frequently Asked Questions (FAQ)

Q: Can the AQY214S be used in place of the PS7241E-1A-A if the application requires 120mA load current?

A: No. The AQY214S is rated for 100mA maximum load current, while the PS7241E-1A-A is rated for 120mA. Use of the AQY214S in a 120mA application exceeds its specified load current rating.

Q: Are the ASSR-4110-003E and TLP176GA(F) pin-compatible with the PS7241E-1A-A?

A: Both parts maintain the 4-SOP package configuration with gull wing termination and identical physical dimensions (0.173", 4.40mm). Pin compatibility requires verification against specific PCB layout and schematic requirements.

Q: What is the significance of the REACH Affected status on the PS7241E-1A-A?

A: REACH Affected status indicates the part may contain substances of concern under EU REACH regulations. All three substitute parts carry REACH Unaffected or unspecified status, providing regulatory advantage for applications subject to REACH compliance requirements.

Q: Does the lower on-state resistance of the ASSR-4110-003E (25 Ohms vs. 35 Ohms) affect circuit design?

A: Lower on-state resistance reduces voltage drop across the relay output terminals and decreases power dissipation. This is a beneficial characteristic that does not require circuit redesign; the ASSR-4110-003E is a direct functional substitute.

Q: Are all substitute parts RoHS compliant?

A: Yes. The ASSR-4110-003E and AQY214S are ROHS3 Compliant. The TLP176GA(F) is RoHS Compliant. All three substitutes meet RoHS requirements, providing environmental compliance advantages over the PS7241E-1A-A.

Q: What is the difference between 4-SOP and 4-SMD package designations?

A: Both designations refer to surface mount packages with identical physical dimensions and gull wing termination. The terminology difference reflects manufacturer nomenclature conventions; the packages are mechanically and electrically equivalent for PCB assembly purposes.