A4875-10 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The A4875-10 is a Solid State Relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device in a Hockey Puck package. This relay is designed for AC load switching applications with a rated load current of 75A and operates across a load voltage range of 80V to 530V. The device features screw terminal connections and is RoHS compliant. As an active product with established inventory availability, substitute parts may be required due to supply chain constraints, application-specific performance needs, or regional sourcing preferences.

Substiute Parts

A4875-10

Sensata-CrydomIn Stock: 825A4875-10 Datasheet

Current PartRFQ

84138153N

CrouzetIn Stock: 92784138153N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A4875-10 is determined by the following critical parameters:

Circuit Configuration: The substitute must maintain SPST-NO (1 Form A) topology to ensure compatible control logic and switching behavior.

Package Type: The Hockey Puck form factor is mandatory for mechanical fit within existing chassis designs and thermal management requirements.

Termination Style: Screw terminal connections must be preserved for direct integration with existing wiring harnesses.

Load Current Rating: The substitute must meet or exceed the 75A load current requirement to handle the intended application load without derating.

Load Voltage Range: The substitute's voltage operating window must encompass or exceed the 80V to 530V range to maintain compatibility across all specified operating conditions.

Input Voltage Compatibility: The control input voltage range must be compatible with the system's control signal source.

Mounting Type: Chassis mount configuration is required for consistent mechanical installation.

Compliance Status: RoHS compliance is mandatory for regulatory adherence in target markets.

The Crouzet 84138153N meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (A4875-10): Recommended for applications requiring the specified 80V minimum load voltage threshold and 75A current capacity. Active product status ensures continued availability and manufacturer support.

Substitute Part (84138153N): The Crouzet 84138153N is a qualified substitute for applications where the load voltage range of 24V to 500V is acceptable. The higher 90A current rating provides additional margin for load transients. The zero-cross switching feature reduces EMI generation compared to standard AC switching. Both parts maintain RoHS compliance and identical mechanical form factors. The 84138153N supports a broader input voltage range (20 ~ 260VAC/DC), offering flexibility in control signal sourcing.

Selection between these parts should be based on specific application load voltage minimums and input control voltage requirements. Both parts are active products with established supply chain presence.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84138153N replace the A4875-10 in all applications?

A: The 84138153N is compatible with applications where the load voltage remains within its 24V to 500V operating range. If your application requires operation below 24V load voltage, the A4875-10 is the required choice. Both parts share identical circuit topology, package form factor, and termination style.

Q: What is the significance of the zero-cross switching feature in the 84138153N?

A: Zero-cross switching synchronizes relay activation to the AC voltage zero-crossing point, reducing inrush current and electromagnetic interference. This is an enhanced feature that does not affect basic substitution compatibility but may improve system performance in noise-sensitive applications.

Q: Are the Hockey Puck packages mechanically identical?

A: Both the A4875-10 and 84138153N use Hockey Puck form factors with screw terminal connections and chassis mount configurations. Mechanical compatibility is confirmed for direct replacement in existing designs.

Q: What input voltage range should I use for the substitute part?

A: The A4875-10 operates with 90 ~ 280VAC input control voltage. The 84138153N accepts 20 ~ 260VAC/DC input. If your control signal is within the 90 ~ 260VAC range, both parts are compatible. The 84138153N's broader input range (including DC capability) provides additional flexibility if control signal sourcing changes.

Q: Are both parts RoHS compliant?

A: Yes, both the A4875-10 and 84138153N are RoHS compliant and suitable for applications requiring regulatory adherence in target markets.

Q: What is the load current difference between these parts?

A: The A4875-10 is rated for 75A load current, while the 84138153N is rated for 90A. The higher rating of the substitute part provides additional thermal margin and transient current capacity without affecting substitution compatibility.