Sensata-Crydom A1240E Solid State Relay - Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom A1240E is an active, production-status solid state relay (SSR) configured as SPST-NO (1 Form A) in a hockey puck package. This component functions as an AC zero-cross relay with a 40 A load capacity and operates across a 24 V to 140 V load voltage range. The A1240E is RoHS compliant and suitable for chassis mount applications requiring screw terminal connections. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, application-specific voltage requirements, or design optimization needs.

Substiute Parts

A1240E

Sensata-CrydomIn Stock: 1011A1240E Datasheet

Current PartRFQ

84137122N

CrouzetIn Stock: 80684137122N Datasheet

MFR RecommendedRFQ

84137122N

CrouzetIn Stock: 80684137122N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Crouzet 84137122N is identified as a manufacturer-recommended substitute for the A1240E based on the following substitution criteria:

Both parts share identical electrical control characteristics: SPST-NO circuit configuration, AC zero-cross output type, and matching 18 ~ 36 VAC input voltage specification. Both components are housed in hockey puck packages with chassis mount orientation and screw terminal connections, ensuring mechanical and installation compatibility.

The primary distinction between these parts is load current capacity and load voltage range. The A1240E supports 40 A at 24 ~ 140 V, while the 84137122N supports 50 A at 48 ~ 660 V. The 84137122N provides higher current handling and extended voltage range, making it suitable for applications requiring greater load capacity or higher voltage operation. Both parts maintain RoHS compliance and active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the A1240E and 84137122N are active, production-status components with RoHS compliance certification. Selection between these parts depends on application load requirements. The A1240E is appropriate for applications operating within 24 ~ 140 V load voltage and requiring 40 A maximum current. The 84137122N is suitable for applications requiring load voltages up to 660 V or load currents up to 50 A. Both parts are certified for equivalent control signal input (18 ~ 36 VAC) and share identical mechanical form factors, enabling direct substitution in chassis mount installations with screw terminal connections.

Frequently Asked Questions (FAQ)

Q: Can the 84137122N replace the A1240E in all applications?

A: The 84137122N is mechanically and electrically compatible for control signal input. However, substitution is appropriate only when the application load voltage does not exceed 660 V and load current does not exceed 50 A. If the application operates within the A1240E's specified range (24 ~ 140 V, 40 A maximum), either part is suitable.

Q: What is the significance of the load voltage range difference?

A: The A1240E operates with load voltages from 24 V to 140 V. The 84137122N extends this range to 48 V ~ 660 V. Applications requiring load voltages above 140 V must use the 84137122N. Applications with load voltages below 48 V may use either part within their respective ranges.

Q: Are the hockey puck packages identical between these parts?

A: Both parts use hockey puck package types with chassis mount orientation and screw terminal connections. Mechanical compatibility is confirmed for direct installation in existing mounting configurations.

Q: Do both parts require the same input control voltage?

A: Yes. Both the A1240E and 84137122N operate with identical input voltage specifications of 18 ~ 36 VAC, ensuring control circuit compatibility.

Q: What is the difference in load current capacity?

A: The A1240E is rated for 40 A maximum load current. The 84137122N is rated for 50 A maximum load current. Applications requiring current handling above 40 A must use the 84137122N.