NTA2425 Solid State Relay SPST-NO 25A 24-280V Equivalent & Substitute Parts

Part Overview

The NTA2425 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 25A load current with input voltage range of 90-140VAC and load voltage range of 24-280V. The device features zero-cross switching for AC output control and employs a hockey puck form factor with screw terminal connections suitable for chassis mount applications.

The NTA2425 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and new design implementations.

Substiute Parts

NTA2425

Sensata-CrydomIn Stock: 920NTA2425 Datasheet

Current PartRFQ

84134011

Sensata TechnologiesIn Stock: 103484134011 Datasheet

DirectRFQ

A2425

Sensata-CrydomIn Stock: 1071A2425 Datasheet

DirectRFQ

SSR-240A25

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NTA2425 are classified based on electrical and mechanical parameter alignment:

Direct Substitutes maintain identical or compatible electrical specifications across all critical parameters: circuit configuration (SPST-NO), load current (25A), load voltage range (24-280V), output type (AC with zero-cross switching), mounting type (chassis mount), termination style (screw terminal), and package form factor (hockey puck).

Similar Substitutes meet the same functional requirements and electrical specifications but may originate from different manufacturers or product series, requiring verification of mechanical fit and terminal compatibility within the application context.

The following parameters determine substitution eligibility:

• Circuit configuration: SPST-NO (1 Form A)
• Load current rating: 25 A
• Load voltage range: 24 V ~ 280 V
• Output switching type: AC, Zero Cross
• Physical form factor: Hockey Puck
• Termination: Screw Terminal
• Mounting: Chassis Mount

Parameter Comparison

Engineering Selection Recommendations

84134011 (Sensata Technologies) is the primary direct substitute. This part is currently in active production status, offers expanded input voltage range (90-280VAC versus the original 90-140VAC), maintains all critical electrical and mechanical parameters, and carries RoHS Compliant certification. This part represents the most direct replacement path from the obsolete NTA2425.

A2425 (Sensata-Crydom) is a direct substitute from the original manufacturer. This part is active in production, expands input voltage range to 90-280VAC, maintains all functional specifications, and carries ROHS3 Compliant certification. Selection of this part maintains the original manufacturer relationship while providing an active alternative.

SSR-240A25 (TE Connectivity Potter & Brumfield Relays) is a similar substitute from an alternative manufacturer. This part is active in production and meets all electrical and mechanical specifications. However, this part carries RoHS non-compliant status and REACH Affected designation, requiring compliance evaluation within the target application context.

Selection should prioritize parts with active production status and compliance certifications appropriate to the application regulatory environment.

Frequently Asked Questions (FAQ)

Q: Can the NTA2425 be directly replaced with 84134011?

A: Yes. The 84134011 maintains identical circuit configuration (SPST-NO), load current rating (25A), load voltage range (24-280V), output type (AC, zero-cross), mounting type (chassis mount), termination style (screw terminal), and package form factor (hockey puck). The 84134011 offers expanded input voltage range (90-280VAC) and is in active production status.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes originate from the same manufacturer (Sensata-Crydom/Sensata Technologies) and maintain the original product series lineage. Similar substitutes meet identical electrical and mechanical specifications but originate from alternative manufacturers. All listed parts meet the functional requirements of the NTA2425.

Q: Are there compliance differences between substitute options?

A: Yes. The 84134011 carries RoHS Compliant certification. The A2425 carries ROHS3 Compliant certification. The SSR-240A25 is RoHS non-compliant. Selection should align with application-specific regulatory requirements.

Q: Does the expanded input voltage range of substitute parts affect compatibility?

A: No. The substitute parts with expanded input voltage range (90-280VAC) are backward compatible with applications designed for the original NTA2425 input range (90-140VAC). The expanded range provides additional flexibility for future applications without compromising existing designs.

Q: Are mechanical dimensions and terminal spacing identical across all substitute parts?

A: All listed parts share the hockey puck form factor and screw terminal configuration. Physical verification is recommended prior to installation in space-constrained applications to confirm mounting clearance and terminal accessibility.