PS7241E-1A-F3-A Solid State Relay: Equivalent & Substitute Parts

Part Overview

The PS7241E-1A-F3-A is a Solid State SPST-NO (1 Form A) relay manufactured by CEL, designed for switching applications with a maximum load current of 120 mA across a voltage range of 0 V to 400 V. The device operates with a 1.2 VDC input and features a maximum on-state resistance of 35 Ohms. Currently classified as obsolete, this component requires identification of active equivalent alternatives to support ongoing system maintenance and new design implementations. The part is supplied in a 4-SOP surface mount package with gull wing termination.

Substiute Parts

PS7241E-1A-F3-A

CELIn Stock: 19513PS7241E-1A-F3-A Datasheet

Current PartRFQ

TLP176GA(F)

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS7241E-1A-F3-A is determined by strict equivalence across the following critical parameters:

Circuit Configuration: Both the main part and substitute must maintain SPST-NO (1 Form A) topology to ensure identical switching behavior.

Output Capability: Load voltage range (0 V ~ 400 V) and load current (120 mA) must be met or exceeded by the substitute.

On-State Resistance: Maximum on-state resistance of 35 Ohms establishes the electrical performance threshold.

Input Voltage: The substitute input voltage must be compatible with the control circuit driving the relay. Minor variations (1.15 VDC vs. 1.2 VDC) remain within acceptable operating margins for solid state relay applications.

Package and Mounting: Surface mount configuration with gull wing termination and 4-SOP package footprint ensures mechanical and electrical compatibility with existing PCB layouts.

Moisture Sensitivity: MSL rating of 1 (Unlimited) indicates no moisture-related handling restrictions.

The TLP176GA(F) manufactured by Toshiba Semiconductor and Storage meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

The TLP176GA(F) is the direct active substitute for the obsolete PS7241E-1A-F3-A. Selection is based on the following engineering criteria:

Product Status: The PS7241E-1A-F3-A is classified as obsolete, making long-term supply unavailable. The TLP176GA(F) maintains active product status with confirmed inventory availability (905 Pcs New Original In Stock), ensuring supply chain continuity.

Electrical Equivalence: All critical electrical parameters—circuit configuration, load voltage range, load current, and on-state resistance—are identical between the two parts. The input voltage differential (1.15 VDC vs. 1.2 VDC) is within normal operating tolerance for solid state relay control circuits.

Regulatory Compliance: The TLP176GA(F) carries RoHS Compliant certification, meeting modern environmental and regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0030) classifications.

Package Compatibility: Both parts utilize 4-SOP surface mount packages with gull wing termination, ensuring direct PCB footprint compatibility without layout modifications.

Moisture Handling: Both parts carry MSL rating 1 (Unlimited), indicating no moisture-related storage or handling restrictions.

Frequently Asked Questions (FAQ)

Q: Can the TLP176GA(F) be used as a direct replacement for the PS7241E-1A-F3-A without circuit modifications?

A: Yes. The TLP176GA(F) is electrically and mechanically equivalent. All critical parameters—circuit configuration, load voltage range, load current, on-state resistance, input voltage, and package footprint—are compatible. No circuit modifications are required.

Q: What is the significance of the input voltage difference (1.15 VDC vs. 1.2 VDC)?

A: The 0.05 VDC difference is within normal operating tolerance for solid state relay control circuits. Both values represent the minimum input voltage threshold for reliable relay activation. Existing control circuits designed for 1.2 VDC operation will function correctly with the TLP176GA(F) at 1.15 VDC.

Q: Are there any package footprint differences between the PS7241E-1A-F3-A and TLP176GA(F)?

A: Both parts use 4-SOP surface mount packages with gull wing termination. The PS7241E-1A-F3-A specifies 4-SOP (0.173", 4.40mm), while the TLP176GA(F) is designated as 4-SMD, Gull Wing. These designations refer to the same physical package standard, ensuring direct PCB compatibility.

Q: Why is the PS7241E-1A-F3-A classified as obsolete?

A: Obsolete status indicates that the manufacturer (CEL) has discontinued production and support for this part. The TLP176GA(F) from Toshiba Semiconductor and Storage provides an active, supported alternative with identical electrical and mechanical specifications.

Q: Does the TLP176GA(F) meet current regulatory requirements?

A: Yes. The TLP176GA(F) is RoHS Compliant, meeting current environmental and regulatory standards. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0030) classifications for export and tariff purposes.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL rating 1 (Unlimited), indicating no moisture-related handling restrictions. Standard PCB assembly and storage practices apply without special moisture control requirements.