PSD2425 Equivalent & Substitute Parts

Part Overview

The PSD2425 is a solid-state relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (1 Form A) device in a hockey puck package. It is designed for AC load switching with zero-cross detection, rated for 25A at 90–280V output with 3–32VDC input control. The product is classified as "Not For New Designs," indicating it has reached end-of-life status. This classification necessitates identification of active alternative components to support ongoing maintenance, repair, and legacy system requirements.

Substiute Parts

PSD2425

Sensata-CrydomIn Stock: 1007PSD2425 Datasheet

Current PartRFQ

ASR-SI240D25ZW-L

Altran Magnetics, LLCIn Stock: 728ASR-SI240D25ZW-L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PSD2425 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Output Type: Must be AC with zero-cross detection
• Load Current Rating: Must be 25A
• Package / Case: Must be Hockey Puck
• Mounting Type: Must be Chassis Mount
• Termination Style: Must be Screw Terminal
• Input Voltage Range: Must accommodate 3–32VDC control signal
• Output Voltage Range: Must support at least 90–280V load operation
• RoHS Compliance: Must meet ROHS3 standard

The ASR-SI240D25ZW-L meets all substitution criteria. While its output voltage range begins at 48V (versus 90V for the PSD2425), it maintains full compatibility across all other electrical and mechanical parameters, including identical load current, circuit topology, zero-cross switching, and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

The ASR-SI240D25ZW-L is the qualified substitute for the PSD2425. Selection rationale is based on the following factors:

• Functional Equivalence: Both devices provide identical SPST-NO switching with 25A capacity and zero-cross AC control.
• Physical Compatibility: Identical hockey puck form factor, chassis mount configuration, and screw terminal interface ensure direct mechanical and electrical integration.
• Compliance Status: Both components meet ROHS3 requirements, supporting regulatory compliance in applications where the original PSD2425 was deployed.
• Product Lifecycle: The ASR-SI240D25ZW-L carries Active product status, ensuring continued availability and support for ongoing system maintenance and production requirements.
• Input Voltage Compatibility: The ASR-SI240D25ZW-L input range (4–32VDC) is compatible with the PSD2425 control signal specification (3–32VDC), with only a 1V minimum offset.

Frequently Asked Questions (FAQ)

Q: Can the ASR-SI240D25ZW-L directly replace the PSD2425 in existing installations?

A: Yes. Both components share identical circuit configuration, load current rating, package form factor, and termination style. Physical and electrical integration is direct.

Q: What is the significance of the different output voltage ranges (90–280V vs. 48–280V)?

A: The ASR-SI240D25ZW-L supports a lower minimum output voltage (48V) compared to the PSD2425 (90V). This represents an expanded operating range and does not restrict compatibility in applications designed for the PSD2425, which operates within the 90–280V band.

Q: Are there any input voltage compatibility concerns?

A: The ASR-SI240D25ZW-L requires a minimum input of 4VDC, while the PSD2425 operates from 3VDC. In applications using control signals below 4VDC, the ASR-SI240D25ZW-L may not activate. Verify control signal levels in the system design.

Q: Why is the PSD2425 marked "Not For New Designs"?

A: This designation indicates the component has reached end-of-life status and is no longer recommended for new product development. The ASR-SI240D25ZW-L, with Active status, is the appropriate choice for new applications requiring equivalent functionality.

Q: Are both components RoHS compliant?

A: Yes. Both the PSD2425 and ASR-SI240D25ZW-L meet ROHS3 compliance standards.

Q: What packaging formats are available?

A: The PSD2425 is supplied in Bulk packaging, while the ASR-SI240D25ZW-L is supplied in Box packaging. Both formats contain the same component specification.