PSD4825 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PSD4825 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 25A load current with input voltage range of 4–32VDC and load voltage range of 48–530VAC. The device features zero-cross switching for AC loads and is housed in a hockey puck package with screw terminal connections.

The PSD4825 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new designs.

Substiute Parts

PSD4825

Sensata-CrydomIn Stock: 1205PSD4825 Datasheet

Current PartRFQ

RA4825-D12

Carlo Gavazzi Inc.In Stock: 1283RA4825-D12 Datasheet

DirectRFQ

ASR-SI480D25ZW-L

Altran Magnetics, LLCIn Stock: 1061ASR-SI480D25ZW-L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PSD4825 are qualified based on the following electrical and mechanical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Load Current Rating: Must be 25 A
• Output Type: Must be AC with zero-cross switching
• Package / Case: Must be hockey puck form factor
• Mounting Type: Must be chassis mount
• Termination Style: Must be screw terminal
• Input Voltage Range: Must accommodate 4–32 VDC or equivalent
• Load Voltage Range: Must accommodate 48–530 VAC or equivalent

Two substitute parts meet these criteria:

1. RA4825-D12 (Carlo Gavazzi Inc.) – Direct substitute with load voltage range of 42–530VAC and input voltage range of 3–32VDC
2. ASR-SI480D25ZW-L (Altran Magnetics, LLC) – Direct substitute with identical electrical specifications to the PSD4825

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, addressing the obsolescence of the PSD4825.

RA4825-D12 provides a direct substitute with extended input voltage range (3–32VDC) and slightly lower minimum load voltage (42VAC vs. 48VAC). This part maintains RoHS compliance and is available in bulk packaging.

ASR-SI480D25ZW-L provides an exact electrical match to the PSD4825 with identical input and load voltage ranges. This part meets ROHS3 compliance and is available in box packaging.

Both parts share identical circuit configuration, current rating, output type, package form factor, mounting method, and termination style. Selection between these substitutes depends on packaging requirements, voltage range margins, and compliance certification preferences.

Frequently Asked Questions (FAQ)

Q: Can the RA4825-D12 replace the PSD4825 in all applications?

A: The RA4825-D12 is electrically compatible with the PSD4825 for applications operating within the overlapping voltage ranges (4–32VDC input, 48–530VAC load). The extended input voltage range (3–32VDC) provides additional flexibility. Both devices share identical circuit configuration, current rating, output type, and package form factor.

Q: What is the difference between the two substitute parts?

A: Both RA4825-D12 and ASR-SI480D25ZW-L meet the core electrical and mechanical requirements. The RA4825-D12 offers a lower minimum load voltage (42VAC) and is supplied in bulk packaging. The ASR-SI480D25ZW-L provides an exact voltage specification match and is supplied in box packaging. Both are active products with current availability.

Q: Are the hockey puck packages physically identical?

A: All three parts use hockey puck package form factors with chassis mount configuration and screw terminal connections. Physical compatibility is maintained across all three devices for mounting and connection purposes.

Q: What compliance certifications apply to these substitutes?

A: The PSD4825 and RA4825-D12 are RoHS Compliant. The ASR-SI480D25ZW-L is ROHS3 Compliant. All three parts are classified under ECCN EAR99 and HTSUS 8536.41.0060.

Q: Why is the PSD4825 listed as obsolete?

A: The PSD4825 is no longer in active production. The RA4825-D12 and ASR-SI480D25ZW-L are active alternatives that provide equivalent functionality and are currently available from inventory.