CD4825W2U Equivalent & Substitute Parts

Part Overview

The CD4825W2U is a solid-state relay (SSR) manufactured by Sensata-Crydom, designed for SPST-NO (Single Pole Single Throw - Normally Open) switching applications. This dual-channel hockey puck configuration provides 25A load switching capability across a 48V to 660V AC range with zero-cross detection. The part is actively produced and RoHS compliant, making it suitable for industrial control, power distribution, and switching applications requiring reliable solid-state switching without mechanical contacts.

Equivalent parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing while maintaining functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

CD4825W2U

Sensata-CrydomIn Stock: 815CD4825W2U Datasheet

Current PartRFQ

ASR-SID480D25ZL

Altran Magnetics, LLCIn Stock: 820ASR-SID480D25ZL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD4825W2U is determined by the following critical parameters:

Load Current Matching: The substitute part must provide 25A switching capacity to maintain equivalent load-handling capability.

Circuit Configuration: Both the main part and substitute must feature SPST-NO (1 Form A) x 2 dual-channel configuration to ensure functional equivalence in switching topology.

Output Type: AC output with zero-cross detection is required to maintain switching characteristics and noise reduction in AC applications.

Mounting and Termination: Chassis mount configuration is required. However, termination style may vary (screw terminal vs. quick connect) provided the electrical interface remains compatible with the application circuit.

Load Voltage Range: The substitute part's load voltage range must encompass or substantially overlap the 48V to 660V specification. Partial overlap is acceptable if the application operates within the overlapping range.

Input Voltage Range: The substitute part must accept the control signal voltage range. The CD4825W2U accepts 4~32VDC input; substitutes with 4~15VDC input range are acceptable if the application control voltage remains within 4~15VDC.

Compliance: RoHS compliance status must be maintained or upgraded (RoHS3 is acceptable as an upgrade from RoHS).

Parameter Comparison

Engineering Selection Recommendations

The ASR-SID480D25ZL is a qualified substitute for the CD4825W2U under the following conditions:

Load Voltage Compatibility: The application load voltage must operate within the 48V to 530V range. Applications requiring operation above 530V or below 48V cannot use this substitute.

Input Voltage Compatibility: The control signal voltage must remain within the 4V to 15VDC range. Applications requiring input voltages between 15VDC and 32VDC cannot use this substitute.

Mechanical Integration: The substitute uses a Module package with quick-connect termination (0.250" / 6.3mm) instead of the hockey puck form factor with screw terminals. Mechanical mounting and electrical connection points must be verified for compatibility with the application enclosure and wiring infrastructure.

Compliance Status: Both parts maintain RoHS compliance. The ASR-SID480D25ZL carries ROHS3 certification, which represents an upgraded compliance standard suitable for replacement in RoHS-regulated applications.

Product Status: Both parts are actively manufactured, ensuring continued availability for procurement and support.

Frequently Asked Questions (FAQ)

Q: Can the ASR-SID480D25ZL replace the CD4825W2U in all applications?

A: No. The substitute is compatible only when the application load voltage remains between 48V and 530V, and the control input voltage remains between 4V and 15VDC. Applications requiring higher load voltages (up to 660V) or higher input voltages (up to 32VDC) must use the original CD4825W2U.

Q: What is the difference between the hockey puck and module packages?

A: The CD4825W2U uses a hockey puck form factor with screw terminal connections. The ASR-SID480D25ZL uses a module package with quick-connect 0.250" (6.3mm) termination. These are different physical form factors requiring different mounting and connection methods.

Q: Are the termination styles compatible?

A: No. The CD4825W2U uses screw terminals, while the ASR-SID480D25ZL uses quick-connect terminals. The application wiring and connection infrastructure must be adapted to accommodate the different termination style.

Q: Does the substitute provide the same load current capacity?

A: Yes. Both parts are rated for 25A load current switching capacity.

Q: What is zero-cross detection, and do both parts provide it?

A: Zero-cross detection is a feature that synchronizes the SSR switching action with the AC voltage waveform zero-crossing point, reducing electromagnetic interference and switching noise. Both the CD4825W2U and ASR-SID480D25ZL provide AC output with zero-cross detection.

Q: Are both parts RoHS compliant?

A: Yes. The CD4825W2U is RoHS compliant. The ASR-SID480D25ZL is ROHS3 compliant, which represents an upgraded and more stringent compliance standard.

Q: What should I verify before using the substitute?

A: Verify that your application load voltage operates within 48V to 530V, your control input voltage operates within 4V to 15VDC, and your mechanical mounting and electrical connection infrastructure can accommodate the module package with quick-connect termination.