TA2425 Solid State Relay SPST-NO 25A 24-280V Equivalent & Substitute Parts

Part Overview

The TA2425 is a Sensata-Crydom solid state relay (SSR) with SPST-NO (1 Form A) configuration, rated for 25A load current and 24-280V output voltage range. This chassis-mount hockey puck relay operates with AC output and zero-cross switching capability. The part is currently in Last Time Buy status, making equivalent and substitute parts identification critical for procurement planning and long-term design continuity.

Substiute Parts

TA2425

Sensata-CrydomIn Stock: 949TA2425 Datasheet

Current PartRFQ

84134911

Sensata-CrydomIn Stock: 87784134911 Datasheet

DirectRFQ

A2425

Sensata-CrydomIn Stock: 1071A2425 Datasheet

DirectRFQ

84137011N

CrouzetIn Stock: 111684137011N Datasheet

SimilarRFQ

ASR-SI240A25ZY-LR

Altran Magnetics, LLCIn Stock: 975ASR-SI240A25ZY-LR Datasheet

SimilarRFQ

SSR-240A25

TE Connectivity Potter & Brumfield RelaysIn Stock: 1840SSR-240A25 Datasheet

SimilarRFQ

SSRT-240A25

TE Connectivity Potter & Brumfield RelaysIn Stock: 780SSRT-240A25 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TA2425 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: SPST-NO (1 Form A) only
• Load current rating: 25A minimum
• Load voltage range: 24-280V minimum coverage
• Input voltage range: 90-280VAC minimum coverage
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Package type: Hockey Puck

Substitute parts are classified into two categories:

Direct Substitutes: Parts meeting all electrical and mechanical parameters with identical or superior specifications.

Similar Substitutes: Parts meeting core electrical parameters but with minor deviations in input voltage range, output type characteristics, or compliance certifications that may require application-level verification.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Substitutes:

A2425 (Sensata-Crydom) meets all electrical and mechanical specifications with identical input/output voltage ranges and zero-cross switching. Active product status and ROHS3 compliance provide long-term availability and regulatory alignment.

SSRT-240A25 (TE Connectivity Potter & Brumfield Relays) provides full electrical equivalence with identical voltage ratings and load current. ROHS3 compliance and active status support sustained procurement.

Alternative Substitutes:

84134911 (Sensata-Crydom) maintains manufacturer continuity and active status. Output type specification lists AC without explicit zero-cross notation; verify zero-cross functionality requirement before selection.

84137011N (Crouzet) offers active status and zero-cross switching. Input voltage range (20-265VAC) provides lower minimum threshold than TA2425 (90VAC minimum); applications requiring 90VAC minimum input must confirm compatibility.

Not Recommended:

SSR-240A25 (TE Connectivity Potter & Brumfield Relays) carries RoHS non-compliant status, creating regulatory and procurement risk for new designs.

ASR-SI240A25ZY-LR (Altran Magnetics, LLC) specifies load voltage as 24-24V, which does not meet the 24-280V range requirement of the TA2425.

Frequently Asked Questions (FAQ)

Q: Can A2425 directly replace TA2425 in existing designs?

A: Yes. A2425 matches all critical electrical parameters (90-280VAC input, 24-280V load, 25A, SPST-NO, AC zero-cross) and mechanical specifications (chassis mount, screw terminal, hockey puck package). Both are Sensata-Crydom products with identical functional characteristics.

Q: What is the difference between TA2425 and 84134911?

A: Both are Sensata-Crydom SPST-NO 25A relays with identical voltage and current ratings. The primary difference is output type specification: TA2425 explicitly lists "AC, Zero Cross" while 84134911 lists "AC" without zero-cross notation. Confirm zero-cross switching requirement before substitution.

Q: Why is ASR-SI240A25ZY-LR not suitable?

A: ASR-SI240A25ZY-LR specifies load voltage as 24-24V, which does not cover the full 24-280V range required by TA2425. This part is limited to 24V load applications only.

Q: Can 84137011N be used if input voltage is below 90VAC?

A: 84137011N supports input voltage from 20-265VAC, providing lower minimum threshold than TA2425 (90VAC minimum). If your application requires operation below 90VAC input, 84137011N is compatible. For applications requiring 90VAC minimum input, both parts are functionally equivalent.

Q: What is the impact of RoHS compliance differences?

A: TA2425 is RoHS Compliant. A2425 and SSRT-240A25 are ROHS3 Compliant (newer standard). SSR-240A25 is RoHS non-compliant. For new designs and regulated applications, select ROHS3 compliant alternatives (A2425 or SSRT-240A25) to ensure regulatory alignment and long-term market acceptance.

Q: Are packaging differences between Bulk and Box significant?

A: Packaging format (Bulk vs. Box) affects logistics and storage but does not impact electrical or mechanical compatibility. Select based on procurement volume and inventory management requirements.