D2440D-10 Equivalent & Substitute Parts

Part Overview

The D2440D-10 is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with dual form A circuits in a hockey puck package. This component is designed for AC load switching applications with a 40A load current capacity across a 24V to 280V operating range. The device is actively produced and RoHS3 compliant, making it suitable for industrial control and switching applications where electromechanical relays are being replaced with solid state technology.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or when design requirements permit operation within the specified electrical and mechanical parameter ranges.

Substiute Parts

D2440D-10

Sensata-CrydomIn Stock: 20372D2440D-10 Datasheet

Current PartRFQ

84140300

Sensata TechnologiesIn Stock: 96684140300 Datasheet

DirectRFQ

D2425D

Sensata-CrydomIn Stock: 1391D2425D Datasheet

MFR RecommendedRFQ

84140631N

CrouzetIn Stock: 71584140631N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D2440D-10 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO (1 Form A) x 2
• Output type: AC switching capability
• Input voltage range: Must accommodate 4 ~ 15VDC control signal
• Load voltage range: Must support minimum 24V to 280V operation
• Load current capacity: Must equal or exceed 40A
• Termination compatibility: Quick Connect or equivalent mechanical interface
• Mounting type: Chassis Mount configuration

Substitute Categories:

Direct Equivalent (84140300): Identical electrical specifications and package type. Manufactured by Sensata Technologies under the GN2 series. Meets all primary compatibility criteria with equivalent load current (40A) and voltage ranges.

Manufacturer Recommended - Reduced Current (D2425D): Sensata-Crydom part with identical circuit configuration, voltage ranges, and package type. Load current reduced to 25A. Suitable for applications where 40A capacity is not required. Includes zero-cross switching feature.

Manufacturer Recommended - Enhanced Specifications (84140631N): Crouzet-manufactured part with higher load current (50A) and extended load voltage range (24V ~ 510V). Input voltage range expanded to 4 ~ 32VDC. Package type changed to Module with screw terminal termination. Suitable for applications requiring higher current capacity or voltage range, with mechanical interface modification required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (84140300): Select this part when identical electrical and mechanical specifications are required. This substitute maintains full compatibility with existing circuit designs and mechanical mounting interfaces. Both the D2440D-10 and 84140300 are active products with current manufacturing status and RoHS3 compliance, ensuring long-term availability and regulatory alignment.

For Current-Limited Applications (D2425D): Select this part when the application load current does not exceed 25A. This Sensata-Crydom part maintains identical package geometry, termination style, and voltage specifications as the D2440D-10. The addition of zero-cross switching capability provides enhanced performance in certain AC load applications. RoHS3 compliance and active product status ensure regulatory and supply chain continuity.

For Enhanced Capacity Applications (84140631N): Select this part when load current requirements exceed 40A or when load voltage must extend beyond 280V to 510V. The expanded input voltage range (4 ~ 32VDC) accommodates broader control signal specifications. Note that this substitute requires mechanical interface modification due to screw terminal termination and module package type, necessitating circuit board or mounting structure redesign. RoHS3 compliance and active product status are maintained.

Frequently Asked Questions (FAQ)

Q: Can 84140300 be used as a direct drop-in replacement for D2440D-10?

A: Yes. The 84140300 maintains identical electrical specifications (40A load current, 24V ~ 280V load voltage, 4 ~ 15VDC input), circuit configuration (SPST-NO x 2), package type (hockey puck), and termination style (quick connect 0.250"). No circuit or mechanical modifications are required.

Q: When should D2425D be selected instead of the D2440D-10?

A: Select D2425D when the application load current requirement is 25A or less. This part is electrically and mechanically compatible with D2440D-10 designs but operates at reduced current capacity. The zero-cross switching feature may provide performance benefits in specific AC load applications.

Q: What modifications are necessary to use 84140631N as a substitute?

A: The 84140631N requires mechanical interface modification. The termination style changes from quick connect (0.250") to screw terminal, and the package changes from hockey puck to module format. Circuit board or mounting structure redesign is necessary. The expanded input voltage range (4 ~ 32VDC) and load voltage range (24V ~ 510V) may require verification against existing control and load specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The D2440D-10 (ROHS3), 84140300 (RoHS), D2425D (ROHS3), and 84140631N (ROHS3) all meet RoHS compliance requirements. The D2440D-10, D2425D, and 84140631N are specifically ROHS3 compliant.

Q: What is the difference between the D2440D-10 and D2425D output types?

A: The D2440D-10 specifies AC output type. The D2425D specifies AC with zero-cross switching capability. Zero-cross switching synchronizes relay activation with the AC voltage waveform zero-crossing point, reducing electromagnetic interference and improving load switching performance in certain applications.

Q: Can 84140631N be used in applications requiring the exact 24V ~ 280V load voltage range?

A: Yes. The 84140631N load voltage range (24V ~ 510V) encompasses the D2440D-10 specification (24V ~ 280V). However, the expanded range does not indicate enhanced performance within the original 24V ~ 280V window. The primary advantage of 84140631N is the higher load current capacity (50A) and extended voltage capability for applications exceeding 280V.