Sensata-Crydom 84137322 SSR Relay SPST-NO 50A 48-660V Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom 84137322 is an active solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50A load current and 48-660V output voltage range. This hockey puck-style chassis mount relay is designed for AC switching applications with 18-36VAC input control voltage. The part is RoHS compliant and carries unlimited moisture sensitivity level (MSL 1), making it suitable for industrial control and power switching applications. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the hockey puck package category.

Substiute Parts

84137322

Sensata-CrydomIn Stock: 74484137322 Datasheet

Current PartRFQ

84138123N

CrouzetIn Stock: 108984138123N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Sensata-Crydom 84137322 are qualified based on the following critical electrical and mechanical parameters:

• Circuit Configuration: SPST-NO (1 Form A) topology must be maintained
• Load Current Rating: Minimum 50A capability required
• Package Type: Hockey puck form factor with chassis mount compatibility
• Termination: Screw terminal interface for direct connection compatibility
• Output Type: AC switching capability (zero-cross switching acceptable as enhancement)
• Load Voltage Range: Must accommodate the 48-660V operating window or equivalent industrial voltage range
• Input Control Voltage: Compatible control voltage range for system integration
• Compliance: RoHS compliance and active product status preferred for long-term availability

The Crouzet 84138123N qualifies as a manufacturer-recommended substitute based on matching load current (50A), identical package geometry (hockey puck), equivalent circuit configuration (SPST-NO), and compatible termination style (screw terminal). Differences in input voltage range and load voltage ceiling do not preclude substitution when application requirements fall within the substitute's operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the Sensata-Crydom 84137322 and Crouzet 84138123N are active products with RoHS compliance, ensuring regulatory alignment and long-term supply availability. The primary selection criterion depends on application load voltage requirements:

• Sensata-Crydom 84137322: Select when load voltage range extends to 660V or when input control voltage must remain within 18-36VAC specification.
• Crouzet 84138123N: Select when load voltage operates within 24-500V range and when flexible input control voltage (20-260VAC/DC) provides system integration advantages. The zero-cross switching feature offers enhanced noise immunity in AC applications.

Both parts maintain identical 50A load current capacity, hockey puck package geometry, and screw terminal interface, ensuring mechanical and electrical interchangeability within their respective voltage operating windows.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84138123N replace the Sensata-Crydom 84137322 in all applications?

A: Substitution is valid only when the application load voltage remains within the Crouzet part's 24-500V range. If the system requires operation above 500V or the input control voltage must be limited to 18-36VAC, the original Sensata-Crydom part is required.

Q: What is the significance of zero-cross switching in the Crouzet substitute?

A: Zero-cross switching synchronizes relay activation to the AC voltage zero-crossing point, reducing electromagnetic interference and switching transients. This is an enhancement feature that does not affect basic SPST-NO functionality or load current capacity.

Q: Are the hockey puck packages mechanically identical?

A: Yes. Both parts use identical hockey puck form factor with chassis mount configuration and screw terminal termination, ensuring direct mechanical compatibility in the same mounting footprint.

Q: What compliance certifications apply to both parts?

A: Both the Sensata-Crydom 84137322 and Crouzet 84138123N are RoHS compliant and carry ECCN EAR99 classification. The Crouzet part additionally carries REACH Unaffected status.

Q: How do input voltage ranges differ between the two parts?

A: The Sensata-Crydom 84137322 accepts 18-36VAC input control voltage. The Crouzet 84138123N accepts 20-260VAC/DC input, providing broader control voltage flexibility for systems with variable or DC control signals.

Q: Is the 50A load current rating identical for both parts?

A: Yes. Both parts are rated for 50A load current, ensuring equivalent switching capacity in AC applications.