HA4825G Solid State Relay - Equivalent & Substitute Parts

Part Overview

The HA4825G 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 25A and operates across a load voltage range of 48V to 530V. The device features zero-cross switching capability and screw terminal connections for industrial and control applications. The HA4825G maintains Active product status and is RoHS Compliant, making it suitable for current procurement and long-term deployment in regulated environments.

Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical parameters including load current rating, voltage ranges, switching characteristics, and physical packaging, while meeting the same regulatory compliance standards.

Substiute Parts

HA4825G

Sensata-CrydomIn Stock: 1091HA4825G Datasheet

Current PartRFQ

84137111N

CrouzetIn Stock: 111584137111N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HA4825G is determined by strict alignment across the following critical parameters:

Load Current Rating: The substitute part must maintain a 25A load current capacity to ensure equivalent thermal and switching performance in the target application.

Circuit Configuration: Both the main part and substitute must be SPST-NO (1 Form A) to preserve the same switching logic and control interface.

Output Type: AC switching with zero-cross capability is required to maintain synchronization with AC line voltage and minimize electromagnetic interference.

Load Voltage Range: The substitute's load voltage range must encompass or exceed the 48V to 530V specification of the HA4825G. A substitute with a higher maximum voltage rating (such as 660V) remains compatible as it can safely operate within the lower voltage envelope.

Input Voltage Range: The substitute's input voltage range must be compatible with the control signal source. The HA4825G accepts 90–280VAC input; substitutes with overlapping or broader input ranges are acceptable.

Package and Mounting: Both parts must use the Hockey Puck package with Chassis Mount configuration to ensure mechanical fit and thermal management compatibility.

Termination Style: Screw terminal connections are required for direct compatibility with existing wiring harnesses and control panels.

Regulatory Compliance: RoHS Compliance status ensures the substitute meets the same environmental and material restrictions as the original part.

Parameter Comparison

Engineering Selection Recommendations

The 84137111N (Crouzet) is a qualified substitute for the HA4825G (Sensata-Crydom) based on the following engineering criteria:

Functional Equivalence: Both parts are SPST-NO solid state relays with 25A load current capacity and AC zero-cross switching. The electrical switching behavior and control interface are functionally identical.

Voltage Compatibility: The 84137111N supports a load voltage range of 48V to 660V, which fully encompasses the HA4825G's 48V to 530V specification. The substitute can safely operate across all load voltages specified for the original part.

Input Signal Compatibility: The 84137111N input voltage range (20–265VAC) overlaps with the HA4825G range (90–280VAC). Applications using input signals within the 90–265VAC window are directly compatible.

Physical and Mechanical Compatibility: Both relays use identical Hockey Puck packaging, Chassis Mount configuration, and screw terminal termination, ensuring direct mechanical and electrical integration into existing control panels and assemblies.

Regulatory Compliance: Both parts are RoHS Compliant and maintain Active product status, confirming current manufacturing support and compliance with environmental regulations.

Packaging Consideration: The HA4825G is supplied in Bulk packaging, while the 84137111N is supplied in Box packaging. This difference does not affect functional compatibility but may influence procurement logistics and inventory management.

Frequently Asked Questions (FAQ)

Q: Can the 84137111N replace the HA4825G in all applications?

A: The 84137111N is functionally equivalent for applications where the control input voltage falls within the 90–265VAC range. If your application requires input voltages below 90VAC or above 265VAC, the HA4825G must be used. Both parts are otherwise electrically and mechanically compatible.

Q: Why does the 84137111N have a higher maximum load voltage (660V vs. 530V)?

A: The 84137111N is rated for a broader load voltage envelope. This higher rating does not affect compatibility; the substitute can safely operate at any voltage within the HA4825G's 48–530V specification. The higher rating provides additional design margin and flexibility for future applications.

Q: Are the Hockey Puck packages identical between these two relays?

A: Yes. Both the HA4825G and 84137111N use the same Hockey Puck package with Chassis Mount configuration and screw terminal connections. Direct mechanical substitution is possible without modifications to mounting hardware or wiring harnesses.

Q: What is the significance of zero-cross switching in these relays?

A: Zero-cross switching synchronizes relay activation with the AC line voltage zero-crossing point, reducing inrush current and electromagnetic interference. Both the HA4825G and 84137111N feature this capability, ensuring identical switching behavior and noise characteristics.

Q: Are both parts RoHS Compliant?

A: Yes. Both the HA4825G and 84137111N are RoHS Compliant, meeting the same environmental and material restriction standards. They are suitable for use in regulated industries and applications requiring RoHS certification.

Q: What is the difference between Bulk and Box packaging?

A: Bulk packaging typically indicates loose components supplied in larger quantities for high-volume manufacturing, while Box packaging indicates individual or smaller-quantity packaging for distribution. This difference does not affect the electrical or mechanical performance of the relay.

Q: Can I use the 84137111N if my application requires input voltages below 90VAC?

A: No. The 84137111N input range begins at 20VAC, which is lower than the HA4825G's 90VAC minimum. However, if your application requires input voltages below 90VAC, the 84137111N would be the appropriate choice. Verify your control signal voltage before selecting either part.