PS7122AL-1A-A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7122AL-1A-A is a Solid State SPST-NO (1 Form A) relay manufactured by CEL, designed for switching applications up to 250V AC/DC with a maximum load current of 200 mA. This device is classified as obsolete, necessitating identification of functionally equivalent alternative components for continued system support and procurement planning. Substitute parts must maintain electrical compatibility across input voltage, load voltage, load current, and output switching characteristics while adhering to identical package and termination specifications.

Substiute Parts

PS7122AL-1A-A

CELIn Stock: 1349PS7122AL-1A-A Datasheet

Current PartRFQ

AQV253A

Panasonic Electric WorksIn Stock: 1635AQV253A Datasheet

SimilarRFQ

LH1510AAB

Vishay Semiconductor Opto DivisionIn Stock: 1470LH1510AAB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PS7122AL-1A-A are qualified based on the following critical parameters:

Mandatory Compatibility Criteria:

• Circuit Configuration: SPST-NO (1 Form A)
• Output Type: AC/DC switching capability
• Load Current Rating: 200 mA minimum
• Package / Case: 6-SMD (0.300", 7.62mm)
• Termination Style: Gull Wing
• Mounting Type: Surface Mount

Allowable Parameter Variance:

• Input Voltage: 1.14 VDC to 1.27 VDC (operational tolerance range)
• Load Voltage: 0 V ~ 200 V to 0 V ~ 250 V (minimum 200 V capability required)
• On-State Resistance: 8 Ohms to 15 Ohms (acceptable for equivalent current handling)

All identified substitutes maintain the identical electrical function, package footprint, and switching characteristics required for direct replacement in PS7122AL-1A-A applications.

Parameter Comparison

Engineering Selection Recommendations

AQV253A (Panasonic Electric Works - PhotoMOS™ AQV Series)

The AQV253A is an active-production substitute with electrical parity to the PS7122AL-1A-A across all critical parameters. Input voltage (1.14 VDC) and on-state resistance (8 Ohms) match the original specification exactly. Load voltage rating remains at 250 V, maintaining full compatibility with existing designs. RoHS3 compliance provides environmental regulatory alignment for current manufacturing standards.

LH1510AAB (Vishay Semiconductor Opto Division - LH1510 Series)

The LH1510AAB operates as a compatible substitute with the following engineering considerations: input voltage tolerance (1.27 VDC) remains within functional parity, load voltage maximum is reduced to 200 V (acceptable for applications not requiring full 250 V switching capability), and on-state resistance increases to 15 Ohms (acceptable within 200 mA load current specification). RoHS3 compliance and MSL 1 rating ensure process compatibility. This substitute is selected for applications where 200 V load voltage switching is sufficient.

Frequently Asked Questions (FAQ)

Q: Can the AQV253A replace the PS7122AL-1A-A in all applications?

A: Yes, the AQV253A maintains identical electrical specifications (1.14 VDC input, 8 Ohms on-state resistance, 200 V minimum load voltage) and package configuration (6-SMD Gull Wing). Direct substitution is supported without circuit modification.

Q: What are the load voltage differences between substitute parts?

A: The PS7122AL-1A-A and AQV253A both support 0 V ~ 250 V load switching. The LH1510AAB supports 0 V ~ 200 V, making it suitable for applications not requiring the full 250 V range.

Q: Does the LH1510AAB's higher on-state resistance affect circuit performance?

A: The LH1510AAB on-state resistance is 15 Ohms (maximum), compared to 8 Ohms for the original part. At the 200 mA load current specification, this produces a voltage drop increase of approximately 1.4 mV, remaining negligible for standard switching applications.

Q: Are all substitute parts available in the same packaging?

A: Yes, all three parts use identical 6-SMD (0.300", 7.62mm) Gull Wing termination, supporting direct board-level substitution without layout modification.

Q: What compliance certifications apply to the substitute parts?

A: AQV253A carries RoHS3 compliance with Not Applicable MSL rating. LH1510AAB carries RoHS3 compliance with MSL 1 (Unlimited) rating, matching the original part's environmental classification.