CWD4890P Solid State Relay - Equivalent & Substitute Parts

Part Overview

The CWD4890P is a solid state relay (SSR) manufactured by Sensata-Crydom, classified as a SPST-NO (1 Form A) hockey puck configuration. This component is designed for AC load switching applications with zero-cross detection capability. The part is currently in active production status with 2,100 units available in inventory. Identifying equivalent substitute parts becomes necessary when primary component availability is limited, when supply chain requirements mandate alternative sourcing, or when design flexibility permits selection from qualified alternatives meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	CWD4890P Specification
Manufacturer	Sensata-Crydom
Circuit Configuration	SPST-NO (1 Form A)
Output Type	AC, Zero Cross
Input Voltage Range	4 – 32 VDC
Load Voltage Range	48 V – 660 V
Load Current Rating	90 A
Mounting Type	Chassis Mount
Package Type	Hockey Puck
Termination Style	Screw Terminal
RoHS Status	ROHS3 Compliant
REACH Status	REACH Affected

Substitute Part Grouping Explanation

Substitution eligibility for the CWD4890P is determined by strict alignment of the following critical parameters:

Circuit Configuration: Must be SPST-NO (1 Form A) topology
Output Type: Must support AC switching with zero-cross detection
Input Voltage Range: Must accommodate 4 – 32 VDC control signal
Load Voltage Range: Must support minimum 48 V and maximum 660 V operation
Load Current Rating: Must equal or exceed 90 A continuous rating
Package Type: Must be hockey puck form factor
Mounting Type: Must be chassis mount compatible
Termination Style: Must use screw terminal interface

The substitute part 84137140N (Crouzet, Series GN) meets the core functional requirements of SPST-NO configuration, AC zero-cross output, compatible input voltage range (4 – 32 VDC), and identical package/mounting specifications. However, the load voltage range (20 V – 265 V) and load current rating (100 A) differ from the primary part specifications and must be evaluated against application requirements.

Parameter Comparison

Parameter	CWD4890P (Sensata-Crydom)	84137140N (Crouzet)	Compatibility Note
Circuit Configuration	SPST-NO (1 Form A)	SPST-NO (1 Form A)	Identical
Output Type	AC, Zero Cross	AC, Zero Cross	Identical
Input Voltage Range	4 – 32 VDC	4 – 32 VDC	Identical
Load Voltage Range	48 V – 660 V	20 V – 265 V	Substitute range is narrower; lower maximum voltage
Load Current Rating	90 A	100 A	Substitute exceeds primary rating
Mounting Type	Chassis Mount	Chassis Mount	Identical
Package Type	Hockey Puck	Hockey Puck	Identical
Termination Style	Screw Terminal	Screw Terminal	Identical
RoHS Status	ROHS3 Compliant	RoHS Compliant	Both compliant; different versions
REACH Status	REACH Affected	REACH Unaffected	Different regulatory classification

Engineering Selection Recommendations

Selection between CWD4890P and 84137140N must be based on application load voltage requirements. The CWD4890P supports load voltages up to 660 V, while the 84137140N is rated for maximum 265 V. Applications requiring operation above 265 V cannot use the Crouzet substitute. For applications operating within the 48 V – 265 V range, both parts satisfy the load voltage requirement, and the 84137140N's higher current rating (100 A vs. 90 A) provides additional margin.

Both parts maintain active product status and are currently in stock. The CWD4890P carries ROHS3 compliance and REACH Affected designation, while the 84137140N is RoHS compliant and REACH Unaffected. Regulatory compliance requirements specific to the end application must be evaluated when selecting between these alternatives.

Frequently Asked Questions (FAQ)

Q: Can the 84137140N substitute for CWD4890P in all applications?

A: No. The 84137140N is suitable only for applications where the load voltage does not exceed 265 V. Applications requiring operation at voltages between 48 V and 660 V must use the CWD4890P or identify alternative parts with equivalent high-voltage ratings.

Q: Does the higher current rating of 84137140N (100 A) make it a superior choice?

A: Higher current rating does not indicate superiority; it indicates different design specifications. The 100 A rating of the 84137140N is a characteristic of that component design and does not enhance performance in applications requiring only 90 A. Selection must be based on matching application requirements, not on exceeding them.

Q: Are the screw terminal interfaces between these parts physically compatible?

A: Both parts use screw terminal termination style and hockey puck package configuration, ensuring mechanical compatibility with standard mounting hardware and terminal connections. However, electrical compatibility depends on load voltage and current requirements as specified in the parameter comparison table.

Q: What is the significance of the different RoHS and REACH designations?

A: RoHS and REACH are regulatory compliance frameworks. ROHS3 Compliant indicates compliance with the third iteration of the Restriction of Hazardous Substances directive. REACH Affected vs. REACH Unaffected indicates different regulatory obligations under the Registration, Evaluation, Authorization and Restriction of Chemicals regulation. Selection between parts must align with the regulatory requirements of the end-use market and application.

Q: Can I use the 84137140N as a temporary substitute while waiting for CWD4890P availability?

A: Temporary substitution is permissible only if the application load voltage remains within the 20 V – 265 V range and all other electrical and mechanical parameters align with application requirements. Any deviation from these parameters requires engineering evaluation before substitution.

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