Sensata-Crydom A4825 SSR Relay - Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom A4825 is an active solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 25A load current and 80-530V output voltage range. This chassis-mount hockey puck package device operates with AC zero-cross switching and accepts 90-280VAC input. Finding equivalent or substitute parts may be necessary due to inventory constraints, supply chain considerations, or application-specific requirements while maintaining functional compatibility.

Substiute Parts

A4825

Sensata-CrydomIn Stock: 869A4825 Datasheet

Current PartRFQ

84134111

Sensata-CrydomIn Stock: 116284134111 Datasheet

DirectRFQ

84137111N

CrouzetIn Stock: 111584137111N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A4825 are qualified based on the following critical parameters that determine functional interchangeability:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Load Current Rating: Must be 25 A
• Output Type: Must be AC with zero-cross switching
• Package / Case: Must be Hockey Puck
• Mounting Type: Must be Chassis Mount
• Termination Style: Must be Screw Terminal

The substitute parts listed below meet these core electrical and mechanical requirements. Variations in input voltage range, load voltage range, and compliance certifications are noted but do not preclude substitution when application parameters fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Sensata-Crydom 84134111: This direct substitute maintains identical input voltage specifications (90-280VAC) and load current (25A) as the A4825. The load voltage range extends to 660V maximum, providing broader application coverage than the A4825's 530V limit. Both parts are ROHS3 compliant and REACH affected. The 84134111 is classified as an active product with equivalent compliance status.

Crouzet 84137111N: This manufacturer-recommended substitute offers cross-manufacturer compatibility with identical load current and circuit configuration. The input voltage range (20-265VAC) is slightly narrower than the A4825 but covers standard industrial AC supply ranges. Load voltage capability extends to 660V. This part is RoHS compliant and REACH unaffected, which may be advantageous in certain regulatory environments. The 84137111N is an active product supplied in box packaging rather than bulk.

Selection between substitutes should be based on application-specific load voltage requirements, input supply voltage characteristics, and regulatory compliance needs for the end application.

Frequently Asked Questions (FAQ)

Q: Can the 84134111 directly replace the A4825 in all applications?

A: The 84134111 is electrically compatible when the application load voltage does not exceed 530V. If your application requires load voltages between 531V and 660V, the 84134111 provides extended capability. Both parts share identical input voltage range, load current rating, and circuit configuration.

Q: What is the difference between the Sensata-Crydom and Crouzet substitutes?

A: Both 84134111 (Sensata-Crydom) and 84137111N (Crouzet) meet the core electrical requirements. The primary differences are manufacturer origin, input voltage range (84134111: 90-280VAC; 84137111N: 20-265VAC), packaging format (bulk vs. box), and regulatory status (REACH affected vs. unaffected).

Q: Are all three parts housed in the same hockey puck package?

A: Yes. The A4825, 84134111, and 84137111N all use the hockey puck package with screw terminal connections and chassis mount configuration, ensuring mechanical compatibility in existing installations.

Q: Which substitute should I select if my application operates at 100V load voltage?

A: All three parts are suitable. The A4825 operates from 80V minimum, while both substitutes operate from 48V minimum, providing margin below your application requirement.

Q: Does REACH compliance status affect substitution eligibility?

A: REACH status indicates regulatory classification but does not determine electrical or mechanical compatibility. Selection should be based on your application's regulatory requirements. The A4825 and 84134111 are REACH affected; the 84137111N is REACH unaffected.