A2440-10 Solid State Relay SPST-NO 40A 24-280V

Part Overview

The A2440-10 is an active, RoHS-compliant solid state relay (SSR) manufactured by Sensata-Crydom. This SPST-NO (1 Form A) relay operates as a hockey puck chassis-mount component with screw terminal connections. It is designed for AC output switching applications with input voltage range of 90–280VAC and load voltage capability from 24V to 280V at 40A continuous current. The part is currently in active production status with 887 units available in bulk packaging.

Equivalent and substitute parts are identified when they maintain functional compatibility across critical electrical parameters while meeting the same mechanical and environmental standards.

Substiute Parts

A2440-10

Sensata-CrydomIn Stock: 921A2440-10 Datasheet

Current PartRFQ

84137321N

CrouzetIn Stock: 91084137321N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Crouzet 84137321N is identified as a manufacturer-recommended substitute for the A2440-10. Substitution eligibility is determined by the following criteria:

Electrical Compatibility:

• Both parts maintain SPST-NO (1 Form A) circuit configuration
• Both support AC output switching
• Both operate within overlapping input voltage ranges (90–260VAC for the substitute vs. 90–280VAC for the main part)
• Both support load voltage operation within the 24V–280V window
• The substitute's 50A current rating exceeds the main part's 40A requirement, ensuring adequate capacity

Mechanical and Environmental Compatibility:

• Both use hockey puck package format
• Both feature chassis mount configuration
• Both employ screw terminal termination
• Both are RoHS compliant
• Both carry EAR99 ECCN classification and identical HTSUS code (8536.49.0080)

The substitute part is suitable for applications where the A2440-10 is specified, provided that the load voltage requirement does not exceed 280V and the input voltage does not exceed 260VAC.

Parameter Comparison

Engineering Selection Recommendations

Both the A2440-10 and 84137321N are active production components with RoHS compliance and identical regulatory classifications (EAR99, HTSUS 8536.49.0080). Selection between these parts should be based on application-specific voltage and current requirements:

Select A2440-10 when:

• Input voltage requirement extends to 280VAC
• Load voltage requirement is below 48V
• 40A current capacity is sufficient

Select 84137321N when:

• Input voltage requirement does not exceed 260VAC
• Load voltage requirement exceeds 280V or falls within the 48V–660V range
• Higher current capacity (50A) provides design margin

Both parts are suitable for direct substitution in SPST-NO AC switching applications with compatible voltage and current specifications.

Frequently Asked Questions (FAQ)

Q: Can the 84137321N replace the A2440-10 in all applications?

A: The 84137321N is suitable for replacement when the application input voltage does not exceed 260VAC and the load voltage requirement falls within the 48V–660V range. If your application requires input voltage up to 280VAC or load voltage below 48V, the A2440-10 is the appropriate choice.

Q: What is the significance of the different load voltage ranges?

A: The A2440-10 supports load voltages from 24V to 280V, while the 84137321N supports 48V to 660V. The substitute part has a higher minimum load voltage (48V vs. 24V) and higher maximum load voltage (660V vs. 280V). Verify that your application load voltage falls within the selected part's range.

Q: Are both parts mechanically interchangeable?

A: Yes. Both parts use identical hockey puck package format, chassis mount configuration, and screw terminal termination. Physical installation is identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the A2440-10 and 84137321N are RoHS compliant and carry the same ECCN (EAR99) and HTSUS (8536.49.0080) classifications.

Q: What is the current rating difference, and does it matter?

A: The A2440-10 is rated for 40A continuous current, while the 84137321N is rated for 50A. The substitute part's higher current rating provides additional capacity margin. If your application requires exactly 40A, either part is acceptable; the 50A rating of the substitute does not create a compatibility issue.

Q: Are there any input voltage limitations when using the substitute?

A: Yes. The 84137321N input voltage range is 90–260VAC, which is narrower than the A2440-10 range of 90–280VAC. If your application requires input voltage between 260VAC and 280VAC, the A2440-10 must be used.