CWU2450 Equivalent & Substitute Parts

Part Overview

The CWU2450 is a solid-state relay (SSR) manufactured by Sensata Technologies, configured as a single-pole single-throw normally open (SPST-NO) device rated for 50A load current. This active product operates with AC zero-cross switching and supports input voltages from 20–280VAC or 20–48VDC, with load voltage capability from 24V to 280V. The device features a hockey puck form factor with screw terminal connections and is mounted as a chassis component. The CWU2450 is RoHS compliant and classified under ECCN EAR99. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges.

Substiute Parts

CWU2450

Sensata TechnologiesIn Stock: 873CWU2450 Datasheet

Current PartRFQ

84138123N

CrouzetIn Stock: 108984138123N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CWU2450 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching topology
• Load Current Rating: Must be rated for minimum 50A to support the specified load
• Input Voltage Range: Must accommodate the 20–280VAC and 20–48VDC input specification
• Load Voltage Range: Must support operation across the 24V–280V load voltage window
• Output Type: Must provide AC zero-cross switching for synchronized load control
• Package / Case: Must be hockey puck form factor for mechanical compatibility
• Termination Style: Must use screw terminals for connection compatibility
• Mounting Type: Must support chassis mount configuration

The substitute part 84138123N (Crouzet GN+ series) meets these criteria with the following considerations: it maintains SPST-NO configuration, 50A load current, screw terminal termination, hockey puck package, and chassis mount capability. The input voltage range (20–260VAC/DC) is slightly narrower than the main part but covers the standard industrial operating window. The load voltage range extends to 500V, exceeding the CWU2450 specification and providing additional application flexibility.

Parameter Comparison

Engineering Selection Recommendations

Both the CWU2450 and 84138123N are active products with RoHS compliance and ECCN EAR99 classification, meeting current regulatory requirements for industrial solid-state relay applications. The CWU2450 is the primary component with 797 units in stock. The 84138123N serves as a qualified substitute with 1048 units available, offering extended load voltage capability (500V versus 280V) while maintaining all critical electrical and mechanical parameters. Selection between these parts should be based on application voltage requirements, supply chain availability, and design specifications for maximum load voltage.

Frequently Asked Questions (FAQ)

Q: Can the 84138123N replace the CWU2450 in all applications?

A: The 84138123N is electrically and mechanically compatible for applications operating within the CWU2450 specification envelope (24V–280V load voltage, 20–280VAC input). The substitute part's extended load voltage rating (500V) does not restrict its use in lower-voltage applications. Verify that the application input voltage does not exceed 260VAC/DC, as the substitute part's input range is slightly narrower.

Q: What is the significance of the hockey puck package form factor?

A: The hockey puck package is a standardized industrial form factor for 50A solid-state relays, ensuring mechanical compatibility with chassis-mount installations designed for this package type. Both the CWU2450 and 84138123N use this identical form factor, guaranteeing direct physical interchangeability.

Q: Are there differences in MSL (Moisture Sensitivity Level) between these parts?

A: The CWU2450 lists MSL as Not Applicable, while the 84138123N is rated MSL 1 (Unlimited). This difference does not affect substitution eligibility, as both ratings indicate suitability for standard industrial storage and handling conditions.

Q: Why is the input voltage range slightly different between the two parts?

A: The CWU2450 supports input up to 280VAC, while the 84138123N supports up to 260VAC. For applications operating at or above 261VAC, the CWU2450 is the required choice. For applications at 260VAC or below, both parts are functionally equivalent.

Q: Do both parts support zero-cross switching?

A: Yes. Both the CWU2450 and 84138123N provide AC zero-cross output switching, ensuring synchronized load control and reduced electromagnetic interference in AC applications.