PS7205B-1A-A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7205B-1A-A is a Solid State SPST-NO (1 Form A) relay manufactured by CEL in a 4-SOP surface mount package. This component provides switching capability for AC and DC loads up to 500 mA at voltages from 0 V to 80 V, with a 1.1 VDC input requirement and 1.2 Ohms maximum on-state resistance.

The PS7205B-1A-A has been classified as obsolete. Finding suitable substitute components is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair activities for systems utilizing this relay.

Substiute Parts

PS7205B-1A-A

CELIn Stock: 690PS7205B-1A-A Datasheet

Current PartRFQ

AQY225R1S

Panasonic Electric WorksIn Stock: 20254AQY225R1S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the PS7205B-1A-A must meet the following criteria:

• Circuit configuration: SPST-NO (1 Form A)
• Package type: 4-SOP (0.173", 4.40mm) with Gull Wing termination
• Mounting: Surface Mount
• Load voltage range: 0 V ~ 80 V minimum
• Input voltage: Compatible with 1.1 VDC control signals
• On-state resistance: 1.2 Ohms or lower
• Output capability: AC and/or DC switching

The AQY225R1S from Panasonic Electric Works meets these substitution criteria. While the AQY225R1S has a maximum load current rating of 350 mA (compared to 500 mA for the original part), it maintains identical package geometry, voltage specifications, on-state resistance, and circuit topology, making it suitable for applications where the 350 mA rating is sufficient.

Parameter Comparison

Engineering Selection Recommendations

The AQY225R1S is the identified substitute for the obsolete PS7205B-1A-A. Selection of this component is supported by the following factors:

Product Status: The AQY225R1S carries an Active product status, ensuring ongoing availability and manufacturer support, in contrast to the obsolete PS7205B-1A-A.

Compliance: The AQY225R1S is ROHS3 Compliant and REACH Unaffected, compared to the original part which is REACH Affected. This provides improved compliance positioning for systems subject to regulatory restrictions.

Electrical Compatibility: Both components operate with identical load voltage ranges (0 V ~ 80 V), matching input voltage specifications (1.1 VDC vs. 1.14 VDC), and equivalent on-state resistance (1.2 Ohms). The AQY225R1S input voltage is within 3.6% of the original, maintaining control signal compatibility.

Package Compatibility: Identical 4-SOP (0.173", 4.40mm) package with Gull Wing termination enables direct board-level substitution without PCB redesign.

Current Rating Consideration: The AQY225R1S supports 350 mA continuous load current. Applications requiring the full 500 mA capability of the original part require evaluation of actual load requirements to confirm adequacy.

Frequently Asked Questions (FAQ)

Q: Can the AQY225R1S be used as a direct replacement on existing PCBs designed for the PS7205B-1A-A? A: Yes. Both components use identical 4-SOP packages with Gull Wing termination and matching lead-to-lead spacing. No PCB modifications are required for physical substitution.

Q: What is the maximum load current difference, and does it affect compatibility? A: The AQY225R1S is rated for 350 mA maximum continuous load current, compared to 500 mA for the PS7205B-1A-A. Substitution is appropriate for applications where the actual load current does not exceed 350 mA. Applications requiring higher current capacity require alternative component selection.

Q: Are the input voltage specifications compatible? A: Yes. The AQY225R1S requires 1.14 VDC input compared to 1.1 VDC for the original part. This 0.04 VDC difference represents 3.6% variance and maintains compatibility with standard control circuits operating at 1.1-1.2 VDC.

Q: What are the load voltage range capabilities? A: Both the PS7205B-1A-A and AQY225R1S support load voltages from 0 V to 80 V for both AC and DC applications, providing identical voltage range compatibility.

Q: What is the significance of the on-state resistance specification? A: Both components specify 1.2 Ohms maximum on-state resistance, ensuring equivalent voltage drop characteristics across the relay contacts. This parameter determines conduction losses and thermal performance under load.

Q: Does the AQY225R1S provide any compliance advantages? A: The AQY225R1S is ROHS3 Compliant and REACH Unaffected, whereas the original PS7205B-1A-A is REACH Affected. For applications in regulated markets, the AQY225R1S provides improved compliance positioning.