PS7122-1A Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PS7122-1A is a solid state relay (SSR) manufactured by CEL, configured as a SPST-NO (Single-Pole Single-Throw, Normally Open) relay with a 200 mA load capacity and 0–200 V output voltage range. The device features a 1.2 VDC input and is packaged in a 6-DIP through-hole configuration. This part has been classified as obsolete, making identification of equivalent and substitute components necessary for ongoing production and maintenance applications.

Substiute Parts

PS7122-1A

CELIn Stock: 3988PS7122-1A Datasheet

Current PartRFQ

AQV217

Panasonic Electric WorksIn Stock: 3143AQV217 Datasheet

DirectRFQ

AQV257

Panasonic Electric WorksIn Stock: 3232AQV257 Datasheet

DirectRFQ

PLA150

IXYS Integrated Circuits DivisionIn Stock: 1504PLA150 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitutes for the PS7122-1A have been identified based on compatibility across the following critical parameters:

• Circuit Configuration: All substitutes must maintain SPST-NO (1 Form A) switching capability
• Package / Case: All substitutes must use 6-DIP (0.300", 7.62 mm) through-hole packaging for direct PCB compatibility
• Voltage - Load (Output): All substitutes must support the full 0–200 V range or higher
• Output Type: All substitutes must support both AC and DC switching
• Load Current: Substitutes must meet or exceed the 200 mA requirement
• Termination Style: All substitutes must use PC pin termination for compatibility with existing designs

Two direct substitutes have been identified: AQV217 and AQV257 from Panasonic Electric Works. A similar substitute, PLA150 from IXYS Integrated Circuits Division, offers enhanced voltage capability (0–250 V) while maintaining electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AQV257

The AQV257 from Panasonic Electric Works is the preferred substitute for the PS7122-1A. Both devices share identical mechanical compatibility (6-DIP through-hole packaging with PC pin termination) and equivalent electrical load specifications (250 mA exceeds the 200 mA requirement). The AQV257 delivers superior on-state resistance (4 Ohms vs. 5 Ohms) and is classified as active product status with RoHS compliance. The marginally lower input voltage (1.14 VDC vs. 1.2 VDC) is within acceptable design tolerances.

Secondary Recommendation: AQV217

The AQV217 is an alternative substitute from Panasonic Electric Works. It meets all mechanical requirements and voltage specifications but operates at 180 mA, which is below the original 200 mA specification. This device is appropriate for designs with load current requirements not exceeding 180 mA. The AQV217 is active product status with RoHS compliance.

Tertiary Recommendation: PLA150

The PLA150 from IXYS Integrated Circuits Division is compatible with all mechanical and electrical requirements of the PS7122-1A and offers enhanced voltage capability (0–250 V). This device meets the original 1.2 VDC input specification exactly. The PLA150 is active product status with RoHS compliance and is suitable for applications requiring extended load voltage tolerance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the PS7122-1A with AQV217 in my circuit?

A: The AQV217 is mechanically and electrically compatible for most applications. However, the load current specification is 180 mA compared to the original 200 mA. Verify that your load current requirement does not exceed 180 mA before substitution.

Q: What is the primary difference between AQV257 and AQV217?

A: The AQV257 supports 250 mA load current while the AQV217 supports 180 mA. Both devices are identical in all other electrical and mechanical parameters. Select based on your circuit's load current requirement.

Q: Why does the PLA150 have a higher maximum load voltage (250 V vs. 200 V)?

A: The PLA150 specifications allow for 0–250 V operation. This provides additional margin for applications approaching the 200 V limit of the original PS7122-1A. The higher rating does not negatively affect designs within the 0–200 V range.

Q: Are there any compliance differences between the substitutes?

A: All active substitutes (AQV217, AQV257, and PLA150) are RoHS compliant, while the original PS7122-1A is RoHS non-compliant. If your assembly process or application requires RoHS compliance, all substitutes are acceptable.

Q: Will these substitutes fit my existing PCB without modifications?

A: Yes. All substitutes use the identical 6-DIP (0.300", 7.62 mm) through-hole package with PC pin termination. No PCB layout changes are required.

Q: What input voltage tolerance should I consider when substituting?

A: The original PS7122-1A requires 1.2 VDC. The AQV217 and AQV257 require 1.14 VDC, while the PLA150 requires 1.2 VDC. These differences are within typical design tolerances. Verify your circuit can supply the specified input voltage before substitution.