D2D40LK Solid State Relay - Equivalent & Substitute Parts

Part Overview

The D2D40LK is a solid state relay (SSR) manufactured by Sensata Technologies, configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with a 40A load capacity. This component is designed for DC switching applications with input voltage range of 4.6 to 32VDC and load voltage capability from 0V to 200V. The D2D40LK is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent substitute parts is necessary to ensure continued availability and supply chain continuity for applications currently utilizing this component.

Substiute Parts

D2D40LK

Sensata TechnologiesIn Stock: 1006D2D40LK Datasheet

Current PartRFQ

D2D40K

Sensata-CrydomIn Stock: 1122D2D40K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D2D40LK is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) to maintain identical switching functionality
• Load Current Rating: Must be rated for 40A minimum to handle the same load conditions
• Input Voltage Range: Must accommodate 4.6 ~ 32VDC control signal
• Load Voltage Range: Must support 0V to 200V DC switching
• Output Type: Must be DC output
• Mounting Type: Must be Chassis Mount for mechanical compatibility
• Termination Style: Must use Screw Terminal for connection compatibility

The D2D40K qualifies as a direct substitute based on these parameters. Both components share the same base product number (D2D40), identical circuit configuration, matching load current and voltage specifications, and compatible mounting and termination characteristics.

Parameter Comparison

Engineering Selection Recommendations

The D2D40K is a qualified substitute for the D2D40LK based on electrical parameter equivalence and regulatory compliance. Both components are RoHS Compliant and manufactured within the Sensata family of solid state relays.

The primary consideration for selection is the package form factor difference. The D2D40K uses a Hockey Puck package configuration, while the D2D40LK uses a standard chassis mount package. This difference requires verification of mechanical fit within the application's enclosure or mounting structure.

The D2D40K load voltage minimum specification of 1V (compared to 0V for the D2D40LK) is compatible with applications operating above 1V. Applications requiring switching at 0V load conditions must retain the D2D40LK or identify alternative components with 0V minimum load voltage capability.

The D2D40K is currently in active production status, ensuring ongoing availability and supply chain stability compared to the Last Time Buy status of the D2D40LK.

Frequently Asked Questions (FAQ)

Q: Can the D2D40K directly replace the D2D40LK in all applications?

A: The D2D40K is electrically equivalent for applications with load voltages of 1V or higher. The primary consideration is mechanical compatibility due to the Hockey Puck package form factor. Verify that the substitute's package dimensions and mounting configuration fit within your application's physical constraints.

Q: What is the difference between the load voltage ranges of 0V-200V and 1V-200V?

A: The D2D40LK supports switching at 0V load conditions, while the D2D40K minimum load voltage is 1V. For applications operating exclusively above 1V, both components are functionally equivalent. Applications requiring 0V switching capability must use the D2D40LK or identify alternative components.

Q: Are both parts RoHS Compliant?

A: Yes, both the D2D40LK and D2D40K are RoHS Compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What does the Hockey Puck package designation mean for the D2D40K?

A: The Hockey Puck package refers to the physical form factor of the solid state relay. This cylindrical or disc-shaped package differs from the standard chassis mount configuration of the D2D40LK. Verify mechanical compatibility with your application's mounting structure before substitution.

Q: Why is the D2D40LK marked as Last Time Buy?

A: Last Time Buy status indicates that the D2D40LK is no longer in active production. Sensata Technologies has transitioned to the D2D40K as the current production equivalent. Existing inventory of the D2D40LK remains available, but future procurement should transition to the D2D40K for supply chain continuity.

Q: Are the input voltage specifications identical between both parts?

A: Yes, both the D2D40LK and D2D40K accept input voltage in the range of 4.6 to 32VDC, ensuring control signal compatibility in applications using either component.