DC100A40C Equivalent & Substitute Parts

Part Overview

The DC100A40C is a solid-state relay (SSR) manufactured by Sensata-Crydom, configured as a SPST-NO (1 Form A) device in a hockey puck package. This component is rated for 40A load current with an input voltage range of 90–140VAC and output voltage capability from 1V to 72V. The product is currently obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and component procurement.

Substiute Parts

DC100A40C

Sensata-CrydomIn Stock: 1082DC100A40C Datasheet

Current PartRFQ

DC100D40C

Sensata-CrydomIn Stock: 873DC100D40C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DC100A40C is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A)
• Output Type: Must be DC
• Load Current Rating: Must be 40 A
• Load Voltage Range: Must support 1 V – 72 V
• On-State Resistance: Must not exceed 7 mOhms
• Package / Case: Must be Hockey Puck
• Mounting Type: Must be Chassis Mount
• Termination Style: Must be Screw Terminal

The DC100D40C meets all these criteria and is identified as the manufacturer-recommended substitute. While the input voltage specification differs (4–32VDC versus 90–140VAC), this represents a different control signal interface rather than a functional incompatibility, as both devices deliver identical load-switching performance.

Parameter Comparison

Engineering Selection Recommendations

The DC100D40C is the direct substitute for the DC100A40C. Both devices are manufactured by Sensata-Crydom within the PowerPlus DC series and maintain identical electrical and mechanical specifications for load switching performance. The DC100D40C is currently in active production status, whereas the DC100A40C is obsolete. The DC100D40C carries ROHS3 compliance certification, providing additional regulatory alignment for new designs and procurement cycles. The primary design consideration is the input voltage interface: the DC100A40C accepts 90–140VAC control signals, while the DC100D40C requires 4–32VDC control signals. System integration must account for this control signal difference during component replacement.

Frequently Asked Questions (FAQ)

Q: Can the DC100D40C directly replace the DC100A40C in existing assemblies?

A: The DC100D40C is electrically and mechanically equivalent for load-switching functions. However, the control signal input differs: DC100A40C requires 90–140VAC, while DC100D40C requires 4–32VDC. Replacement requires verification that the control circuit can supply the appropriate input voltage.

Q: Are there any package or mounting differences between these parts?

A: No. Both devices use the hockey puck package and chassis mount configuration with screw terminals. Physical and electrical interfaces are identical.

Q: What is the significance of the product status difference?

A: The DC100A40C is obsolete and no longer manufactured. The DC100D40C is in active production, ensuring long-term availability and supply chain continuity.

Q: Does the DC100D40C meet current regulatory requirements?

A: Yes. The DC100D40C is ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.

Q: Are the load current and voltage ratings identical?

A: Yes. Both devices are rated for 40A load current and support load voltages from 1V to 72V with a maximum on-state resistance of 7 mOhms.