CWA2450 Solid State Relay SPST-NO 50A 24-280V Equivalent & Substitute Parts

Part Overview

The CWA2450 is an active Sensata-Crydom solid state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50A load current and 24-280V output voltage range. This hockey puck-style relay is designed for chassis mount applications with screw terminal connections and zero-cross AC switching capability. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical form factor, and compliance certifications to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	CWA2450
Manufacturer	Sensata-Crydom
Circuit Configuration	SPST-NO (1 Form A)
Load Current Rating	50 A
Output Voltage Range	24 V ~ 280 V
Input Voltage Range	90 ~ 280 VAC
Output Type	AC, Zero Cross
Package / Case	Hockey Puck
Mounting Type	Chassis Mount
Termination Style	Screw Terminal
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CWA2450 is determined by the following critical parameters:

Circuit Configuration: Must be SPST-NO (1 Form A)
Load Current Rating: Must be 50 A minimum
Package / Case: Must be Hockey Puck form factor
Mounting Type: Must be Chassis Mount
Termination Style: Must be Screw Terminal
Output Type: Must support AC with Zero Cross switching

Two substitute parts meet these criteria with the following considerations:

84134021 (Sensata-Crydom, GN Series): Direct electrical and mechanical equivalent with identical output voltage range (24-280V) and input voltage range (90-280VAC). Differs only in series designation and MSL rating.

84137121N (Crouzet, GN Series): Functionally compatible with extended output voltage range (48-660V) and modified input voltage range (20-265VAC). Represents a higher-rated alternative suitable for applications requiring extended voltage headroom.

Parameter Comparison

Parameter	CWA2450 (Sensata-Crydom)	84134021 (Sensata-Crydom)	84137121N (Crouzet)
Circuit Configuration	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)
Load Current Rating	50 A	50 A	50 A
Output Voltage Range	24 V ~ 280 V	24 V ~ 280 V	48 V ~ 660 V
Input Voltage Range	90 ~ 280 VAC	90 ~ 280 VAC	20 ~ 265 VAC
Output Type	AC, Zero Cross	AC, Zero Cross	AC, Zero Cross
Package / Case	Hockey Puck	Hockey Puck	Hockey Puck
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

84134021 (Sensata-Crydom): Select this substitute when direct electrical and mechanical equivalence is required. This part maintains identical voltage specifications and ROHS3 compliance status, making it the preferred drop-in replacement for CWA2450 applications. Both parts are active products from the same manufacturer.

84137121N (Crouzet): Select this substitute when applications require extended output voltage capability (up to 660V) or when input voltage tolerance must extend below 90VAC (minimum 20VAC). This part is RoHS compliant and active. Note that the extended voltage range may introduce design considerations in applications originally specified for the CWA2450's 24-280V output window.

Both substitutes maintain identical load current rating (50A), circuit configuration (SPST-NO), and mechanical form factor (hockey puck chassis mount with screw terminals), ensuring compatibility with existing mounting and connection infrastructure.

Frequently Asked Questions (FAQ)

Q: Can 84134021 be used as a direct replacement for CWA2450?

A: Yes. The 84134021 maintains identical electrical specifications (50A load current, 24-280V output, 90-280VAC input), circuit configuration (SPST-NO), package form factor (hockey puck), and mounting style (chassis mount with screw terminals). Both are active Sensata-Crydom products with ROHS3 compliance.

Q: What is the primary difference between 84134021 and 84137121N?

A: The 84137121N (Crouzet) provides extended output voltage range (48-660V versus 24-280V) and modified input voltage range (20-265VAC versus 90-280VAC). All other electrical and mechanical parameters remain equivalent. The 84137121N is suitable for applications requiring higher voltage headroom.

Q: Are all three parts compatible with the same mounting hardware?

A: Yes. All three parts share identical mechanical specifications: hockey puck package form factor, chassis mount configuration, and screw terminal termination style. No modifications to mounting infrastructure are required when substituting between these parts.

Q: What compliance certifications apply to each part?

A: CWA2450 and 84134021 are ROHS3 compliant. The 84137121N is RoHS compliant. All three parts are REACH affected or unaffected as specified and carry EAR99 ECCN classification.

Q: Can 84137121N be used in applications originally designed for CWA2450?

A: Yes, provided the application does not depend on the specific 24-280V output voltage window. The 84137121N's extended range (48-660V) is a superset of the CWA2450 specification. The modified input voltage range (20-265VAC) may be advantageous in applications with lower input voltage sources.

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