D2425H Solid State Relay - Equivalent & Substitute Parts

Part Overview

The D2425H is an active, ROHS3 compliant solid state relay manufactured by Sensata-Crydom. This SPST-NO (1 Form A) hockey puck relay is designed for AC load switching with zero-cross detection, rated for 25A continuous load current across a 24V to 280V operating range. The device accepts 3V to 32VDC input control signals and features screw terminal connections for chassis-mount applications.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

D2425H

Sensata-CrydomIn Stock: 983D2425H Datasheet

Current PartRFQ

ASR-SI240D25ZW-LP

Altran Magnetics, LLCIn Stock: 819ASR-SI240D25ZW-LP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D2425H is determined by strict equivalence across the following critical parameters:

• Circuit configuration must remain SPST-NO (1 Form A)
• Output type must be AC with zero-cross detection
• Load current rating must equal or exceed 25A
• Load voltage range must encompass or exceed 24V to 280V minimum
• Input control voltage must be compatible with 3V to 32VDC range
• Package form factor must be hockey puck with screw terminal connections
• Mounting configuration must support chassis mount installation
• RoHS and REACH compliance status must meet or exceed the original specification

The ASR-SI240D25ZW-LP meets these criteria with the following considerations: input voltage minimum is 4VDC (versus 3VDC), and load voltage minimum is 48V (versus 24V). These differences represent a narrower operational envelope within the D2425H's specified range.

Parameter Comparison

Engineering Selection Recommendations

Both the D2425H and ASR-SI240D25ZW-LP are active products with ROHS3 compliance and equivalent circuit functionality. Selection between these parts depends on application-specific load voltage requirements. The D2425H operates from 24V minimum load voltage, while the ASR-SI240D25ZW-LP operates from 48V minimum. Applications requiring load switching below 48V must use the D2425H. Applications operating at 48V and above may use either part. Both devices maintain identical 25A load current capacity and zero-cross AC switching characteristics.

Frequently Asked Questions (FAQ)

Q: Can the ASR-SI240D25ZW-LP replace the D2425H in all applications?

A: No. The ASR-SI240D25ZW-LP has a minimum load voltage of 48V, while the D2425H operates from 24V. Applications with load voltages between 24V and 48V require the D2425H.

Q: Are the input voltage ranges compatible?

A: The ranges are substantially compatible. The D2425H accepts 3V to 32VDC input, while the ASR-SI240D25ZW-LP accepts 4V to 32VDC. Applications using input voltages below 4VDC require the D2425H.

Q: Do both relays use identical packaging and termination?

A: Yes. Both parts use hockey puck form factor with screw terminal connections and chassis mount configuration, ensuring mechanical compatibility in equivalent installations.

Q: What is the significance of zero-cross detection in these relays?

A: Zero-cross detection synchronizes AC load switching to the AC voltage zero-crossing point, reducing electromagnetic interference and extending load life by minimizing inrush current stress.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant and active products. The D2425H is REACH Affected, while the ASR-SI240D25ZW-LP is REACH Unaffected. Application regulatory requirements may influence part selection.

Q: What load current capacity do these relays support?

A: Both the D2425H and ASR-SI240D25ZW-LP are rated for 25A continuous load current.