PSD2450 Equivalent & Substitute Parts

Part Overview

The PSD2450 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 applications with a 50A capacity and operates across 90V to 280V load voltage ranges. The device features zero-cross switching and accepts 3–32VDC input control signals via screw terminals.

The PSD2450 carries a "Not For New Designs" product status, indicating it is obsolete or being phased out. This status necessitates identification of functionally equivalent alternatives for ongoing applications and new system designs.

Substiute Parts

PSD2450

Sensata-CrydomIn Stock: 899PSD2450 Datasheet

Current PartRFQ

ASR-SN240D60ZW-L

Altran Magnetics, LLCIn Stock: 744ASR-SN240D60ZW-L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PSD2450 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching logic
• Output Type: Must support AC switching with zero-cross capability
• Load Current Rating: Must meet or exceed 50A
• Load Voltage Range: Must cover the 90V–280V operating window
• Input Control Voltage: Must accept 3–32VDC signals
• Mounting and Termination: Must support chassis mount with screw terminal connectivity
• Compliance: Must maintain ROHS3 compliance and EAR99 classification

The ASR-SN240D60ZW-L from Altran Magnetics, LLC meets these substitution criteria with enhanced current capacity (60A) and active product status, making it suitable for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The ASR-SN240D60ZW-L is qualified as a direct substitute for the PSD2450 based on the following factors:

• Both devices maintain identical circuit configuration (SPST-NO) and control input specifications (3–32VDC)
• Both support AC zero-cross switching with screw terminal termination
• The substitute provides increased current capacity (60A vs. 50A), offering design margin for existing applications
• The substitute carries active product status, ensuring long-term availability and supply chain continuity
• Both devices maintain ROHS3 compliance and EAR99 classification, preserving regulatory alignment

The primary design consideration is the load voltage range specification. The substitute operates at 24V nominal load voltage, whereas the original supports 90–280V. This difference requires verification against the specific application load voltage requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the ASR-SN240D60ZW-L directly replace the PSD2450 in existing designs?

A: The ASR-SN240D60ZW-L is functionally equivalent for SPST-NO AC switching applications with matching input control voltage (3–32VDC) and screw terminal connectivity. However, the load voltage specification differs (24V vs. 90–280V). Substitution is valid only if the application load voltage is 24V.

Q: What is the significance of the "Not For New Designs" status on the PSD2450?

A: This status indicates the PSD2450 is obsolete or being discontinued by the manufacturer. New system designs should incorporate the ASR-SN240D60ZW-L or equivalent active-status alternatives to ensure long-term component availability and supply chain stability.

Q: Are there mechanical compatibility concerns between the hockey puck and module packages?

A: The PSD2450 uses a hockey puck package, while the ASR-SN240D60ZW-L uses a module package. Both support chassis mount installation with screw terminals. Physical dimensions and mounting hole patterns must be verified against the specific application enclosure before implementation.

Q: Do both devices meet the same compliance standards?

A: Yes. Both the PSD2450 and ASR-SN240D60ZW-L are ROHS3 compliant and classified as EAR99 for export control purposes. Both are REACH-affected or REACH-unaffected as specified in their respective datasheets.

Q: What is the current capacity advantage of the substitute?

A: The ASR-SN240D60ZW-L provides 60A load current capacity compared to the PSD2450's 50A rating. This 20% increase in current handling provides additional design margin for applications operating near the original device's rated capacity.