CSW2425F Solid State Relay SPST-NO 25A 24-280V Equivalent & Substitute Parts

Part Overview

The CSW2425F 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 3-32VDC and output voltage range of 24-280V. The device features a hockey puck form factor with quick connect termination and zero-cross AC output switching.

The CSW2425F is classified as obsolete. Equivalent and substitute parts are necessary to maintain system functionality and ensure continued availability for replacement and new designs. Direct substitutes must maintain electrical compatibility across input voltage, load voltage, load current, and output switching characteristics.

Substiute Parts

CSW2425F

Sensata-CrydomIn Stock: 919CSW2425F Datasheet

Current PartRFQ

D2425F

Sensata-CrydomIn Stock: 1091D2425F Datasheet

DirectRFQ

ASR-SI240D25ZW-LQ

Altran Magnetics, LLCIn Stock: 1145ASR-SI240D25ZW-LQ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSW2425F is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Load Current Rating: Must be rated for minimum 25 A
• Input Voltage Range: Must accommodate 3-32 VDC control signal
• Load Voltage Range: Must support 24-280 V output switching
• Output Type: Must be AC with zero-cross switching capability
• Package Form Factor: Must be hockey puck configuration
• Termination Compatibility: Must use quick connect termination

Two substitute parts meet these criteria with varying degrees of parameter alignment and product status considerations.

Parameter Comparison

Engineering Selection Recommendations

D2425F (Direct Substitute - Preferred)

The D2425F is manufactured by Sensata-Crydom, the same manufacturer as the obsolete CSW2425F. This part maintains identical electrical specifications across all critical parameters: input voltage range (3-32VDC), load voltage range (24-280V), load current (25A), and termination style. The D2425F carries active product status and RoHS compliance certification. This part provides the most direct replacement path with no parameter deviations.

ASR-SI240D25ZW-LQ (Manufacturer Recommended Substitute)

The ASR-SI240D25ZW-LQ is manufactured by Altran Magnetics, LLC and carries active product status with ROHS3 compliance. This part maintains the same circuit configuration, load current rating, and output type. Two parameter differences exist: the input voltage range begins at 4VDC (versus 3VDC for the main part) and the load voltage range begins at 48V (versus 24V for the main part). These differences restrict compatibility to applications where the control signal remains above 4VDC and the load voltage exceeds 48V. The termination style includes both quick connect and disconnect options, providing enhanced flexibility.

Frequently Asked Questions (FAQ)

Q: Can the D2425F directly replace the CSW2425F without circuit modifications?

A: Yes. The D2425F maintains identical electrical specifications across input voltage range, load voltage range, load current rating, output type, and termination style. No circuit modifications are required.

Q: What are the limitations of using ASR-SI240D25ZW-LQ as a substitute?

A: The ASR-SI240D25ZW-LQ has two parameter restrictions: minimum input voltage is 4VDC (not 3VDC) and minimum load voltage is 48V (not 24V). Applications operating below these thresholds require the D2425F or CSW2425F.

Q: Are all substitute parts RoHS compliant?

A: Yes. The D2425F is RoHS Compliant. The ASR-SI240D25ZW-LQ is ROHS3 Compliant. Both meet current environmental compliance requirements.

Q: Do the substitute parts use the same termination connectors?

A: The D2425F uses identical quick connect termination (0.187"/0.250"). The ASR-SI240D25ZW-LQ provides quick connect and disconnect termination options, offering compatibility with the original termination style plus additional flexibility.

Q: Which substitute part should be selected for new designs?

A: For new designs, the D2425F is recommended as the primary choice due to identical parameter specifications and active product status from the original manufacturer. The ASR-SI240D25ZW-LQ is suitable only when application parameters fall within its specified ranges (input voltage ≥4VDC, load voltage ≥48V).