DC100A20 Equivalent & Substitute Parts

Part Overview

The DC100A20 is a Solid State Relay (SSR) SPST-NO (1 Form A) in Hockey Puck configuration, rated for 20A load current with input voltage range of 90–140VAC and output voltage range of 1–72VDC. This component is classified as Obsolete, making identification of suitable substitutes essential for ongoing system support and procurement planning. The DC100D20 serves as the manufacturer-recommended equivalent, offering identical electrical performance with updated input specifications and Active product status.

Substiute Parts

DC100A20

Sensata-CrydomIn Stock: 1057DC100A20 Datasheet

Current PartRFQ

DC100D20

Sensata-CrydomIn Stock: 1160DC100D20 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The DC100D20 qualifies as a direct substitute for the DC100A20 based on the following critical parameters:

• Circuit Configuration: Both parts are SPST-NO (1 Form A)
• Load Current Rating: Both rated at 20 A
• Output Voltage Range: Both support 1 V – 72 V
• On-State Resistance: Both specify 12 mOhms maximum
• Package / Case: Both use Hockey Puck configuration
• Termination Style: Both employ Screw Terminal
• Mounting Type: Both are Chassis Mount

The primary difference lies in input voltage specification: DC100A20 accepts 90–140VAC input, while DC100D20 accepts 4–32VDC input. This distinction reflects different control signal sources but does not affect load-side compatibility. The DC100D20 is Active status, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

The DC100D20 is the appropriate substitute for the DC100A20 based on:

• Product Status: DC100D20 is Active, ensuring long-term availability and manufacturing support, whereas DC100A20 is Obsolete
• Regulatory Compliance: DC100D20 carries ROHS3 Compliant certification, meeting current environmental standards
• Electrical Equivalence: Load-side parameters (current, voltage range, on-state resistance) are identical
• Physical Compatibility: Identical package, mounting, and termination specifications ensure direct mechanical fit

Selection of DC100D20 requires verification that the control signal source provides 4–32VDC input, as this differs from the AC input requirement of the original DC100A20.

Frequently Asked Questions (FAQ)

Q: Can DC100D20 directly replace DC100A20 in all applications?

A: DC100D20 is electrically and mechanically compatible for load-side operation. However, the input voltage specification differs: DC100A20 requires 90–140VAC control signal, while DC100D20 requires 4–32VDC control signal. Substitution is valid only if the control circuit can supply the appropriate DC voltage.

Q: What are the critical parameters for SSR substitution?

A: For this product category, substitution validity depends on: circuit configuration (SPST-NO), load current rating (20 A), output voltage range (1–72V), on-state resistance (12 mOhms), package type (Hockey Puck), and termination style (Screw Terminal).

Q: Why is DC100A20 listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. DC100D20 represents the current-generation equivalent within the PowerPlus DC series.

Q: Are there compliance differences between the two parts?

A: DC100D20 is ROHS3 Compliant, meeting current environmental regulations. Compliance status for DC100A20 is not specified in available documentation.

Q: What is the inventory status for these parts?

A: DC100A20 has 957 pieces available as New Original stock. DC100D20 has 1085 pieces available as New Original stock in Bulk packaging.