Sensata-Crydom 84134121 SSR Relay SPST-NO 50A 48-660V Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom 84134121 is a solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50A load current and 48V to 660V output voltage range. This chassis-mount hockey puck package device operates with AC zero-cross output and accepts 90-280VAC input. The part is currently active in production status with 710 units in stock. Equivalent and substitute parts are identified to provide procurement flexibility, support supply chain continuity, and accommodate specific application requirements or regional availability constraints.

Substiute Parts

84134121

Sensata-CrydomIn Stock: 72184134121 Datasheet

Current PartRFQ

84137121N

CrouzetIn Stock: 101484137121N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Sensata-Crydom 84134121 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Load Current Rating: Must be 50 A minimum
• Load Voltage Range: Must support 48 V – 660 V
• Output Type: Must be AC with zero-cross capability
• Package Type: Must be Hockey Puck chassis mount
• Termination Style: Must be Screw Terminal

The substitute part 84137121N (Crouzet) meets all functional and mechanical requirements. The primary difference is the input voltage range specification (20-265VAC versus 90-280VAC), which represents a broader input acceptance window. Both parts maintain identical load ratings, output voltage ranges, circuit topology, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

Both the Sensata-Crydom 84134121 and Crouzet 84137121N are active production parts with full compliance certifications. Selection between these parts should be based on the following factors:

Sensata-Crydom 84134121: Select this part when the application input voltage range is constrained to 90-280VAC and ROHS3 compliance is a specific requirement. This part is REACH Affected, which may require additional documentation in certain regulatory jurisdictions.

Crouzet 84137121N: Select this part when the application requires broader input voltage acceptance (20-265VAC), providing greater flexibility for variable input conditions. This part is REACH Unaffected, which may simplify compliance documentation in REACH-regulated markets. RoHS compliance is maintained.

Both parts are functionally equivalent for load switching applications within the specified 48-660V range at 50A capacity with zero-cross AC output control.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84137121N be used as a direct replacement for the Sensata-Crydom 84134121?

A: Yes, the Crouzet 84137121N is functionally equivalent. Both parts share identical circuit configuration (SPST-NO), load current rating (50A), load voltage range (48-660V), output type (AC zero-cross), package type (hockey puck), and termination style (screw terminal). The primary difference is the input voltage range specification.

Q: What is the significance of the different input voltage ranges?

A: The Sensata-Crydom 84134121 accepts 90-280VAC input, while the Crouzet 84137121N accepts 20-265VAC input. The Crouzet part has a lower minimum threshold, allowing operation with lower input voltages. Applications with input voltages below 90VAC require the Crouzet part.

Q: Are there packaging differences between these parts?

A: Yes. The Sensata-Crydom 84134121 is supplied in bulk packaging, while the Crouzet 84137121N is supplied in box packaging. Both maintain identical physical hockey puck form factor and screw terminal configuration.

Q: What is the difference between ROHS3 and RoHS compliance?

A: Both designations indicate RoHS compliance. ROHS3 refers to the third iteration of the RoHS directive. Both parts meet RoHS requirements; the designation difference reflects the compliance standard version applicable at the time of certification.

Q: Does REACH status affect part selection?

A: REACH status indicates regulatory applicability in European markets. The Sensata-Crydom 84134121 is REACH Affected, requiring REACH compliance documentation. The Crouzet 84137121N is REACH Unaffected. Selection may depend on end-market regulatory requirements and documentation availability.

Q: Are both parts currently available?

A: Yes. The Sensata-Crydom 84134121 has 710 units in stock, and the Crouzet 84137121N has 969 units in stock, both listed as new original inventory.