PSD2490 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PSD2490 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 90A load current at 90-280V AC output. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The part operates with 3-32VDC input control voltage and features zero-cross switching for AC loads, housed in a hockey puck form factor with screw terminal connections.

Substiute Parts

PSD2490

Sensata-CrydomIn Stock: 874PSD2490 Datasheet

Current PartRFQ

RA4890-D12

Carlo Gavazzi Inc.In Stock: 813RA4890-D12 Datasheet

DirectRFQ

ASR-SN240D100ZW-L

Altran Magnetics, LLCIn Stock: 1172ASR-SN240D100ZW-L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PSD2490 is determined by the following critical parameters: circuit configuration (SPST-NO), input control voltage range (3-32VDC), output switching type (AC with zero-cross), mounting method (chassis mount), and termination style (screw terminal). Load current and output voltage ranges define the operational envelope within which substitutes must function.

Two substitute parts are identified:

RA4890-D12 (Carlo Gavazzi Inc.) maintains identical circuit configuration, input voltage, output switching characteristics, mounting type, and termination style. This substitute provides extended output voltage capability (42-530V) while maintaining the 90A current rating and hockey puck package format.

ASR-SN240D100ZW-L (Altran Magnetics, LLC) matches circuit configuration, input voltage, output switching type, mounting method, and termination style. This substitute increases load current rating to 100A and maintains output voltage compatibility (24-280V). The package format differs as a module rather than hockey puck, and RoHS certification level is ROHS3 versus RoHS.

Parameter Comparison

Engineering Selection Recommendations

RA4890-D12 is the preferred direct substitute when form factor compatibility is required. This part maintains identical package geometry (hockey puck), current rating (90A), and RoHS compliance level. The extended output voltage range (42-530V) provides broader application flexibility compared to the original PSD2490 specification. Both parts are actively manufactured and available in production quantities.

ASR-SN240D100ZW-L is suitable for applications where increased current capacity (100A versus 90A) is beneficial and package form factor modification is acceptable. This part features ROHS3 certification, representing a more recent compliance standard. The module package format requires mechanical redesign of mounting interfaces. Output voltage range (24-280V) encompasses the original specification minimum.

Both substitutes maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete PSD2490.

Frequently Asked Questions (FAQ)

Q: Can RA4890-D12 be used as a direct replacement for PSD2490 without circuit modification?

A: Yes. Both parts share identical circuit configuration (SPST-NO), input control voltage range (3-32VDC), output switching characteristics (AC zero-cross), mounting type (chassis mount), and termination style (screw terminal). The hockey puck package format is identical, allowing direct mechanical substitution. The extended output voltage range of RA4890-D12 (42-530V versus 90-280V) does not prevent operation within the original PSD2490 voltage specification.

Q: What are the mechanical differences between RA4890-D12 and ASR-SN240D100ZW-L?

A: RA4890-D12 maintains the hockey puck form factor identical to PSD2490. ASR-SN240D100ZW-L uses a module package format, requiring modification of mounting brackets and terminal connections. Both are chassis-mount devices with screw terminal connections.

Q: Does the 100A rating of ASR-SN240D100ZW-L provide any advantage over the 90A PSD2490?

A: The 100A rating provides 11% additional current capacity. This is relevant only if the application requires current headroom beyond the original 90A specification. For applications operating at or below 90A, both parts are functionally equivalent in this parameter.

Q: Are there compliance differences between the substitute parts?

A: RA4890-D12 carries RoHS Compliant certification matching PSD2490. ASR-SN240D100ZW-L carries ROHS3 Compliant certification, representing a more recent regulatory standard. Both are RoHS-compliant and suitable for regulated applications. ASR-SN240D100ZW-L includes REACH Unaffected status; this information is not provided for the other parts.

Q: Which substitute should be selected for new designs?

A: Selection depends on mechanical constraints and performance requirements. If the hockey puck form factor is required, RA4890-D12 is the appropriate choice. If package form factor can be modified and increased current capacity is desired, ASR-SN240D100ZW-L is suitable. Both parts are active products with established supply chains.