A4890-10 Solid State Relay SPST-NO 90A Equivalent & Substitute Parts

Part Overview

The A4890-10 is a solid state relay (SSR) manufactured by Sensata-Crydom, designed for AC load switching applications requiring 90A capacity across a wide voltage range (80–530V). This SPST-NO (Single Pole Single Throw, Normally Open) relay features a hockey puck form factor with screw terminal connections and is classified as an active product with RoHS compliance. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits functional alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

A4890-10

Sensata-CrydomIn Stock: 1196A4890-10 Datasheet

Current PartRFQ

84138153N

CrouzetIn Stock: 92784138153N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A4890-10 is permissible when the alternative part meets the following critical parameters:

• Circuit Configuration: SPST-NO (1 Form A) topology required for direct functional equivalence
• Load Current Rating: Minimum 90 A to support specified load requirements
• Load Voltage Range: Must accommodate 80–530 V operation; substitute ranges of 24–500 V satisfy this requirement
• Input Voltage Compatibility: Substitute input voltage ranges (20–260 VAC/DC) are compatible with the primary part's 90–280 VAC specification
• Package Form Factor: Hockey puck chassis mount configuration ensures mechanical and thermal compatibility
• Termination: Screw terminal connections maintain installation compatibility
• Compliance: RoHS compliance required for regulatory alignment

The Crouzet 84138153N meets all substitution criteria. While it includes zero-cross switching capability (an enhancement not present in the A4890-10), this feature does not compromise compatibility and may provide operational benefits in certain applications.

Parameter Comparison

Engineering Selection Recommendations

Both the A4890-10 and 84138153N are active products with RoHS compliance and equivalent electrical ratings for 90 A AC load switching. Selection between these parts should be based on:

• Availability: The A4890-10 (1120 units in stock) and 84138153N (878 units in stock) are both readily available
• Supply Chain Requirements: Either part satisfies regulatory compliance (RoHS, EAR99 ECCN classification)
• Application-Specific Considerations: The 84138153N includes zero-cross switching, which reduces EMI and switching transients in AC applications; this feature is beneficial but not mandatory for functional equivalence
• Thermal and Mechanical Fit: Both parts use identical hockey puck form factors and screw terminal connections, ensuring drop-in compatibility in existing designs

No additional testing or design modification is required when substituting between these parts within their specified electrical operating ranges.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84138153N directly replace the Sensata-Crydom A4890-10?

A: Yes. Both parts are SPST-NO solid state relays rated for 90 A AC output, operate within compatible input and load voltage ranges, use identical hockey puck chassis mount packages with screw terminals, and maintain RoHS compliance. No circuit modification is necessary.

Q: What is the difference between the A4890-10 and 84138153N?

A: The primary difference is that the 84138153N includes zero-cross switching capability, which synchronizes relay closure to the AC voltage zero-crossing point. This reduces electromagnetic interference and switching stress. The A4890-10 does not specify this feature. Both parts meet the same load current and voltage specifications.

Q: Are the input voltage ranges compatible?

A: Yes. The A4890-10 accepts 90–280 VAC input, while the 84138153N accepts 20–260 VAC/DC input. The 84138153N's lower minimum (20 V) and DC capability provide broader flexibility, while the overlap at 90–260 VAC ensures full compatibility in standard AC control circuits.

Q: Do these relays require the same mounting hardware?

A: Yes. Both parts use chassis mount hockey puck form factors with screw terminal connections. Existing mounting brackets, heat sinks, and terminal connections are compatible without modification.

Q: What compliance certifications apply to both parts?

A: Both the A4890-10 and 84138153N are RoHS compliant and classified under ECCN EAR99 for export control purposes. Both carry HTSUS code 8536.49.0080 for tariff classification.

Q: Can these relays be used interchangeably in new designs?

A: Yes. Either part can be selected for new designs requiring 90 A SPST-NO AC switching across 80–530 V load ranges with 90–280 VAC control input. The choice between them depends on design preference regarding zero-cross switching and component availability.