NTD2405 Solid State Relay SPST-NO 5A 24-280V Equivalent & Substitute Parts

Part Overview

The NTD2405 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device with a 5A load current rating and 24-280V AC output capability. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. Substitute parts must maintain compatibility across input voltage, load voltage, circuit configuration, and termination specifications while accommodating the higher current ratings available in active product lines.

Substiute Parts

NTD2405

Sensata-CrydomIn Stock: 1079NTD2405 Datasheet

Current PartRFQ

D2410

Sensata-CrydomIn Stock: 3450D2410 Datasheet

DirectRFQ

84134000

Sensata-CrydomIn Stock: 109984134000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NTD2405 is determined by the following critical parameters:

Load Circuit Compatibility: All substitute parts must maintain SPST-NO (1 Form A) circuit configuration with AC, zero-cross output type to ensure functional equivalence in switching applications.

Voltage Specifications: Substitute parts must support the 24-280V load voltage range. Input voltage tolerance may exceed the original 4-15VDC specification, provided the substitute operates within its rated input range during system deployment.

Current Rating: The NTD2405 operates at 5A load current. Substitute parts with equal or higher current ratings (10A or greater) are acceptable, as they provide equivalent or superior switching capacity without compromising circuit protection.

Physical and Electrical Interface: All substitutes must maintain hockey puck package format with screw terminal connections to ensure mechanical and electrical compatibility with existing mounting and wiring infrastructure.

Manufacturer Consistency: Sensata-Crydom substitutes ensure design continuity and support consistency across the product family.

Parameter Comparison

Engineering Selection Recommendations

D2410 (Direct Manufacturer Substitute): This part is the primary equivalent for NTD2405 replacement. It maintains identical load voltage range (24-280V), circuit configuration (SPST-NO), and package format (hockey puck). The D2410 provides doubled load current capacity (10A versus 5A), expanded input voltage tolerance (3-32VDC), and active product status with ROHS3 compliance. This part is suitable for direct substitution in applications where the 5A load current requirement is met or where higher capacity provides system margin.

84134000 (Similar Manufacturer Substitute): This part offers equivalent electrical performance to D2410 with identical load voltage, circuit configuration, and current rating. The 84134000 maintains active product status and ROHS3 compliance. Selection between D2410 and 84134000 should be based on inventory availability and supply chain considerations, as both parts satisfy the NTD2405 functional requirements.

Both substitute parts are manufactured by Sensata-Crydom, ensuring design continuity and technical support alignment with the original component family.

Frequently Asked Questions (FAQ)

Q: Can the D2410 directly replace the NTD2405 in existing applications?

A: Yes. The D2410 maintains the same load voltage range (24-280V), circuit configuration (SPST-NO with zero-cross AC output), mounting type (chassis mount), and termination style (screw terminal). The expanded input voltage range (3-32VDC versus 4-15VDC) and increased current rating (10A versus 5A) provide enhanced operational flexibility without compromising compatibility.

Q: What is the functional difference between D2410 and 84134000?

A: Both parts provide identical electrical performance for NTD2405 substitution: SPST-NO circuit configuration, 24-280V load voltage, 10A current rating, and hockey puck package format. Selection between these parts should be based on availability and supply chain factors rather than technical performance differences.

Q: Does the higher current rating of substitute parts affect circuit protection?

A: No. The 10A rating of substitute parts represents maximum switching capacity. Applications requiring 5A operation remain fully protected, as the relay will not exceed its design limits at lower current levels. The higher rating provides system margin without introducing protection concerns.

Q: Are the substitute parts compatible with existing mounting and wiring infrastructure?

A: Yes. Both D2410 and 84134000 maintain the hockey puck package format and screw terminal connections of the NTD2405, ensuring direct mechanical and electrical compatibility with existing chassis mounts and terminal connections.

Q: What compliance advantages do the substitute parts offer?

A: Both D2410 and 84134000 are ROHS3 compliant and maintain active product status, ensuring long-term availability and regulatory alignment. The NTD2405, classified as obsolete, lacks these compliance certifications and faces supply discontinuation risk.