PS720C-1A-F3-A Equivalent & Substitute Parts

Part Overview

The PS720C-1A-F3-A is a solid-state relay (SSR) manufactured by CEL, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device in a 4-SOP surface mount package. This component operates with a 1.1VDC input and supports load voltages from 0V to 60V with a maximum load current of 1.25A, suitable for both AC and DC output applications.

The PS720C-1A-F3-A is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

PS720C-1A-F3-A

CELIn Stock: 4156PS720C-1A-F3-A Datasheet

Current PartRFQ

TLP3122(F)

Toshiba Semiconductor and StorageIn Stock: 859TLP3122(F) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS720C-1A-F3-A is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO (1 Form A)
• Package type: 4-SOP (0.173", 4.40mm)
• Termination style: Gull Wing
• Load voltage range: 0V ~ 60V
• Output type: AC, DC capable
• Mounting type: Surface Mount

Operational Compatibility Parameters:

• Input voltage: 1.1VDC (substitute must support this or lower threshold)
• Load current: 1.25A (substitute must support this or higher rating)
• On-state resistance: 190 mOhms maximum (substitute must meet or exceed this specification)

The TLP3122(F) manufactured by Toshiba Semiconductor and Storage meets all mandatory matching parameters and operational compatibility requirements, establishing it as a direct substitute for the PS720C-1A-F3-A.

Parameter Comparison

Engineering Selection Recommendations

PS720C-1A-F3-A (CEL): The original part is classified as obsolete and carries REACH Unaffected status. Current inventory of 4,140 pieces is available. This part should be selected only when existing stock is accessible and design continuity with legacy systems is required.

TLP3122(F) (Toshiba Semiconductor and Storage): This substitute is classified as active product status, ensuring long-term availability and ongoing manufacturer support. The TLP3122(F) is RoHS Compliant, providing environmental and regulatory compliance advantages over the obsolete PS720C-1A-F3-A. Current inventory of 797 pieces is available.

The TLP3122(F) is the recommended selection for new designs, production continuity, and system upgrades. The substitute maintains identical package geometry, circuit configuration, and load voltage specifications. The input voltage threshold difference (1.15VDC vs. 1.1VDC) is operationally negligible for standard control applications. The load current rating of 1A on the TLP3122(F) is lower than the PS720C-1A-F3-A specification of 1.25A; applications requiring the full 1.25A load current must retain the original part or evaluate alternative substitutes with higher current ratings.

Frequently Asked Questions (FAQ)

Q: Can the TLP3122(F) be used as a direct replacement for the PS720C-1A-F3-A in existing PCB designs?

A: Yes. Both components share identical package dimensions (4-SOP, 0.173", 4.40mm), gull wing termination, and surface mount configuration. PCB footprints and solder reflow profiles are compatible without modification.

Q: What is the significance of the load current difference between the two parts?

A: The PS720C-1A-F3-A is rated for 1.25A maximum load current, while the TLP3122(F) is rated for 1A. Applications operating at load currents between 1A and 1.25A must retain the original PS720C-1A-F3-A or identify alternative substitutes with higher current ratings. Applications operating below 1A load current are fully compatible with the TLP3122(F).

Q: Does the on-state resistance difference affect circuit performance?

A: The TLP3122(F) specifies a maximum on-state resistance of 250 mOhms compared to 190 mOhms for the PS720C-1A-F3-A. This 60 mOhm difference results in increased voltage drop across the relay during conduction. For applications with tight voltage margin requirements or high load currents, this difference must be evaluated against system specifications.

Q: What is the input voltage compatibility between the two parts?

A: The PS720C-1A-F3-A operates at 1.1VDC input, while the TLP3122(F) operates at 1.15VDC input. This 0.05VDC difference is operationally compatible for standard control circuits. Both parts function within the same control voltage range for typical applications.

Q: Is the TLP3122(F) suitable for new product designs?

A: Yes. The TLP3122(F) is classified as active product status with RoHS Compliance certification. It is the appropriate selection for new designs requiring long-term component availability and regulatory compliance.

Q: What compliance certifications differ between the two parts?

A: The PS720C-1A-F3-A carries REACH Unaffected status. The TLP3122(F) is RoHS Compliant, providing enhanced environmental compliance for applications subject to RoHS regulations. Both parts share identical ECCN (EAR99) and HTSUS (8536.41.0030) classifications.