D2425K Solid State Relay - Equivalent & Substitute Parts

Part Overview

The D2425K is an active Sensata-Crydom solid state relay (SSR) featuring SPST-NO (1 Form A) switching configuration in a hockey puck package. This component provides AC output with zero-cross switching capability, rated for 25A load current across a 24V to 280V operating range. The device is designed for chassis mount applications with screw terminal connections. Finding equivalent and substitute parts may be necessary due to inventory constraints, supply chain considerations, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

D2425K

Sensata-CrydomIn Stock: 735D2425K Datasheet

Current PartRFQ

ASR-SI240D25Z-LRQ

Altran Magnetics, LLCIn Stock: 1191ASR-SI240D25Z-LRQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D2425K is determined by strict alignment of the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching logic
• Output Type: Must be AC with zero-cross switching for equivalent electrical performance
• Load Current Rating: Must be 25 A to ensure proper thermal and electrical characteristics
• Package Type: Must be hockey puck to ensure mechanical fit in existing designs
• Mounting Type: Must be chassis mount for installation compatibility
• Termination Style: Must be screw terminal for connection compatibility
• Load Voltage Range: Minimum 24V to 280V maximum; substitute parts may have different minimum thresholds provided the upper limit remains at or above 280V
• Input Voltage Range: Substitute parts must accommodate the control signal range; minimum input voltage may vary provided the maximum remains at or above 32VDC

The ASR-SI240D25Z-LRQ meets all critical substitution criteria with the exception of a higher minimum load voltage (48V versus 24V), which represents a functional constraint for applications requiring operation below 48V.

Parameter Comparison

Engineering Selection Recommendations

Both the D2425K and ASR-SI240D25Z-LRQ are active products with ROHS3 compliance, ensuring regulatory alignment for current manufacturing standards. The D2425K provides the broader load voltage operating window (24V minimum), making it suitable for applications requiring operation at lower voltage thresholds. The ASR-SI240D25Z-LRQ operates with a 48V minimum load voltage, restricting its use to applications where the load voltage remains at or above this threshold. Selection between these parts should be based on the specific load voltage requirements of the target application. Both components maintain identical electrical performance characteristics for switching frequency, current capacity, and control signal requirements within their respective operating ranges.

Frequently Asked Questions (FAQ)

Q: Can the ASR-SI240D25Z-LRQ replace the D2425K in all applications?

A: The ASR-SI240D25Z-LRQ is functionally equivalent to the D2425K for applications where the load voltage operates at 48V or higher. Applications requiring load voltages between 24V and 48V require the D2425K specifically.

Q: Are the physical dimensions and mounting footprints identical?

A: Both components use the hockey puck package with chassis mount configuration and screw terminal termination, ensuring mechanical compatibility in existing designs.

Q: What is the significance of the zero-cross switching feature?

A: Zero-cross switching ensures the relay activates only when the AC voltage waveform crosses zero, reducing electromagnetic interference and extending component life in AC load applications.

Q: Do both parts require the same control signal voltage?

A: Both parts accept input voltage in the 3-4V to 32VDC range. The ASR-SI240D25Z-LRQ has a slightly higher minimum input threshold (4VDC versus 3VDC), which is negligible for most control circuit designs.

Q: Are there packaging differences between these parts?

A: The D2425K is supplied in bulk packaging, while the ASR-SI240D25Z-LRQ is supplied in box packaging. This affects procurement and storage but does not impact electrical or mechanical performance.