PSD4890 Equivalent & Substitute Parts

Part Overview

The PSD4890 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 rated for 90A load current with an input voltage range of 4–32VDC and output voltage range of 48–530V. The device features AC output with zero-cross switching and screw terminal connections.

The PSD4890 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for applications currently utilizing this component.

Substiute Parts

PSD4890

Sensata-CrydomIn Stock: 1045PSD4890 Datasheet

Current PartRFQ

RA4890-D12

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

DirectRFQ

ASR-SN480D100ZW-L

Altran Magnetics, LLCIn Stock: 1205ASR-SN480D100ZW-L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PSD4890 is determined by the following critical parameters:

• Circuit configuration must remain SPST-NO (1 Form A)
• Output type must be AC with zero-cross switching capability
• Load current rating must meet or exceed 90A
• Input voltage range must encompass the minimum 4VDC requirement
• Output voltage range must encompass the full 48–530V span
• Mounting type must be chassis mount with screw terminal connections
• Package form factor must be compatible with the original hockey puck design

Two substitute parts meet these criteria with varying degrees of parameter alignment:

RA4890-D12 (Carlo Gavazzi Inc.) – Direct substitute with minor output voltage floor variation (42V vs. 48V minimum)

ASR-SN480D100ZW-L (Altran Magnetics, LLC) – Functional substitute with higher current rating (100A vs. 90A) and lower output voltage floor (24V vs. 48V minimum), but different package form (module vs. hockey puck)

Parameter Comparison

Engineering Selection Recommendations

RA4890-D12 is the primary substitute for PSD4890 applications. Both devices maintain identical load current ratings (90A), matching circuit configuration, and identical output voltage upper limit (530V). The RA4890-D12 has a marginally lower output voltage floor (42V vs. 48V), which expands operational range compatibility. Both are RoHS compliant and feature identical termination and mounting specifications. The RA4890-D12 is currently in active production status, ensuring long-term availability.

ASR-SN480D100ZW-L is a functional alternative for applications where higher current capacity (100A) is beneficial or where lower minimum output voltage (24V) is required. However, the module package form differs from the original hockey puck design, requiring mechanical re-evaluation for mounting compatibility. This device carries ROHS3 compliance, representing a more recent regulatory standard.

Selection between RA4890-D12 and ASR-SN480D100ZW-L depends on mechanical form factor constraints and whether the expanded electrical operating range of the ASR-SN480D100ZW-L provides system-level advantages.

Frequently Asked Questions (FAQ)

Q: Can RA4890-D12 directly replace PSD4890 in existing applications?

A: Yes. Both devices share identical load current ratings (90A), circuit configuration (SPST-NO), output type (AC zero-cross), and termination style (screw terminal). The RA4890-D12 hockey puck package matches the original form factor. The marginally lower output voltage floor (42V vs. 48V) expands rather than restricts operational compatibility.

Q: What is the primary difference between RA4890-D12 and ASR-SN480D100ZW-L?

A: The RA4890-D12 maintains the original 90A current rating and hockey puck package form. The ASR-SN480D100ZW-L provides higher current capacity (100A) and lower minimum output voltage (24V) but uses a module package form instead of hockey puck, requiring mechanical re-evaluation for mounting.

Q: Are all three parts RoHS compliant?

A: Yes. PSD4890 and RA4890-D12 are RoHS compliant. ASR-SN480D100ZW-L is ROHS3 compliant, representing a more recent regulatory standard.

Q: Does the input voltage range difference affect substitution?

A: No. Both substitute parts accept input voltage as low as 3VDC, which is lower than the PSD4890 minimum of 4VDC. This provides expanded input compatibility and does not restrict substitution.

Q: What is the significance of the package form difference for ASR-SN480D100ZW-L?

A: The ASR-SN480D100ZW-L uses a module package instead of hockey puck. While electrical specifications are compatible, mechanical mounting, thermal management, and spatial constraints must be re-evaluated for the specific application before selection.