CTD2410 Solid State Relay SPST-NO 10A 24-280V Equivalent & Substitute Parts

Part Overview

The CTD2410 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 10A load current across 24V to 280V AC output. The unit features a hockey puck form factor with screw terminal connections and zero-cross switching capability for AC loads. The CTD2410 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for ongoing applications and new designs.

Substiute Parts

CTD2410

Sensata-CrydomIn Stock: 779CTD2410 Datasheet

Current PartRFQ

84134900

Sensata-CrydomIn Stock: 112884134900 Datasheet

DirectRFQ

CSW2410

Sensata TechnologiesIn Stock: 798CSW2410 Datasheet

DirectRFQ

D2410

Sensata-CrydomIn Stock: 3450D2410 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CTD2410 is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: All substitutes must maintain SPST-NO (1 Form A) topology
• Load Current Rating: Minimum 10A capacity required
• Load Voltage Range: Must support 24V to 280V AC operation
• Output Type: AC switching with zero-cross capability preferred for load compatibility
• Package / Case: Hockey puck form factor required for mechanical fit
• Termination Style: Screw terminal connections required for installation compatibility
• Mounting Type: Chassis mount orientation must be maintained

The three identified substitute parts—84134900, CSW2410, and D2410—satisfy these core electrical and mechanical requirements. Variations in input voltage range, product status, and compliance certifications are secondary considerations that do not affect functional substitutability within the specified load parameters.

Parameter Comparison

Engineering Selection Recommendations

D2410 is the primary recommended substitute for new designs and ongoing applications. This part maintains active product status with Sensata-Crydom, carries ROHS3 compliance certification, and demonstrates the highest inventory availability (3400 units). The D2410 provides identical electrical performance to the CTD2410 across all critical load parameters while offering extended input voltage tolerance (3–32 VDC versus 3.5–15 VDC).

CSW2410 serves as a secondary substitute option. Manufactured by Sensata Technologies, this part retains zero-cross switching capability and ROHS3 compliance. However, CSW2410 carries a Last Time Buy product status, indicating limited future availability. This part is suitable for applications requiring immediate substitution where D2410 supply is constrained.

84134900 is a tertiary option. While manufactured by Sensata-Crydom and carrying active product status, this part omits zero-cross switching capability (AC output only), which may affect performance in applications sensitive to switching transients. The 84134900 is appropriate only when zero-cross functionality is not required by the application circuit.

Frequently Asked Questions (FAQ)

Q: Can D2410 directly replace CTD2410 in existing assemblies?

A: Yes. The D2410 maintains identical circuit configuration (SPST-NO), load current rating (10A), load voltage range (24–280V AC), package form factor (hockey puck), and termination style (screw terminal). The expanded input voltage range (3–32 VDC) provides additional design flexibility without affecting compatibility.

Q: What is the significance of zero-cross switching in these SSR relays?

A: Zero-cross switching synchronizes relay activation to the AC waveform zero-crossing point, reducing electromagnetic interference and switching transients. The CTD2410, CSW2410, and D2410 all incorporate this feature. The 84134900 lacks zero-cross capability and should be selected only when this feature is not required by the application.

Q: Why is the CTD2410 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and no longer supports this part number. Active substitutes (D2410, 84134900) and Last Time Buy alternatives (CSW2410) are available to fulfill equivalent functional requirements.

Q: Are there compliance differences between substitute parts?

A: All substitute parts carry ROHS3 compliance certification. The CTD2410 is listed as REACH Unaffected, while D2410, CSW2410, and 84134900 are REACH Affected. REACH Affected status indicates the part contains substances of very high concern (SVHC) and requires compliance documentation for European Union applications. Verify REACH compliance requirements for your specific end-use application.

Q: What is the difference between the input voltage ranges?

A: The CTD2410 accepts 3.5–15 VDC input, while D2410, CSW2410, and 84134900 accept 3–32 VDC input. The expanded range in substitute parts provides greater flexibility for control circuit designs but does not affect load-side performance. Existing designs operating within the 3.5–15 VDC window remain fully compatible with all substitute parts.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: These SSR relays are designed for AC load switching with zero-cross capability. They are not suitable for high-frequency switching applications. Consult application-specific requirements and relay switching frequency specifications before selection.