Sensata-Crydom A2450 SSR Relay SPST-NO 50A 24-280V Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom A2450 is a solid-state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 50A load current and 24-280V operation. This hockey puck-style relay is designed for chassis mount applications with screw terminal connections and AC zero-cross output switching. The part is currently active in production with ROHS3 compliance and REACH affected status. Equivalent and substitute parts are identified when electrical specifications, mechanical form factor, and regulatory compliance align with the original component requirements.

Substiute Parts

A2450

Sensata-CrydomIn Stock: 1144A2450 Datasheet

Current PartRFQ

84134021

Sensata-CrydomIn Stock: 93884134021 Datasheet

DirectRFQ

84137121N

CrouzetIn Stock: 101484137121N Datasheet

MFR RecommendedRFQ

SSR-240A50

TE Connectivity Potter & Brumfield RelaysIn Stock: 1159SSR-240A50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A2450 is determined by strict alignment of electrical and mechanical parameters. The critical parameters that define substitutability are: circuit configuration (SPST-NO), load current rating (50A), load voltage range (24-280V minimum), input voltage range (90-280VAC minimum), output type (AC zero-cross), package form factor (hockey puck), mounting type (chassis mount), and termination style (screw terminal).

Substitute parts are grouped into two categories:

Direct Electrical & Mechanical Equivalents: Parts that match all critical electrical specifications and physical form factor without deviation.

Manufacturer-Recommended Alternatives: Parts that maintain functional equivalence within the specified parameter ranges, approved by original equipment manufacturers for cross-application use.

Parameter Comparison

Engineering Selection Recommendations

Sensata-Crydom 84134021: This part is a direct substitute for the A2450, manufactured by the same supplier with identical electrical specifications and form factor. Both parts maintain ROHS3 compliance and REACH affected status. The 84134021 is designated as Series GN and represents an equivalent alternative within the Sensata-Crydom product line.

Crouzet 84137121N: This part is a manufacturer-recommended alternative approved for cross-application use. While it maintains the same circuit configuration, load current rating, and hockey puck form factor, the load voltage range extends to 660V (compared to 280V maximum for the A2450) and the input voltage range is 20-265VAC. The Crouzet part carries RoHS compliance but is REACH unaffected, which may be relevant for specific regulatory environments. Packaging is supplied in box format rather than bulk.

TE Connectivity SSR-240A50: This part is a manufacturer-recommended substitute with identical electrical specifications to the A2450, including 50A load current, 24-280V load voltage range, and 90-280VAC input voltage range. The SSR-240A50 maintains ROHS3 compliance and REACH affected status. This part is designated as Series SSR and represents the TE Connectivity equivalent within the Potter & Brumfield Relays product family.

All three substitute parts are active products with current manufacturing status and meet the core functional requirements of the A2450.

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 84137121N be used as a direct replacement for the A2450 in all applications?

A: The Crouzet 84137121N maintains functional equivalence for SPST-NO 50A AC zero-cross switching applications. However, the extended load voltage range (48-660V) and different input voltage range (20-265VAC) must be verified against your specific circuit requirements. The REACH unaffected status may also be a consideration depending on regulatory requirements in your market.

Q: What is the difference between the Sensata-Crydom A2450 and 84134021?

A: Both parts are manufactured by Sensata-Crydom with identical electrical specifications, form factor, and regulatory compliance. The primary difference is the series designation (Series 1 for A2450 versus Series GN for 84134021). Both are suitable for direct substitution in applications requiring 50A SPST-NO AC zero-cross switching at 24-280V load voltage.

Q: Are all substitute parts available in the same packaging format?

A: No. The A2450 and SSR-240A50 are supplied in bulk packaging, while the Crouzet 84137121N is supplied in box packaging. Packaging format may affect procurement lead times and minimum order quantities.

Q: Do all substitute parts have the same RoHS and REACH compliance status?

A: The A2450, 84134021, and SSR-240A50 are all ROHS3 compliant and REACH affected. The Crouzet 84137121N is RoHS compliant but REACH unaffected. Compliance status should be verified against your product's regulatory requirements before selection.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided that the electrical specifications (load voltage range, input voltage range, and current rating) match your application requirements. The hockey puck form factor and screw terminal connections are consistent across all parts, enabling mechanical interchangeability in chassis mount applications.