Equivalent & Substitute Parts for D1240-10 Solid State Relay

Part Overview

The D1240-10 is a Sensata-Crydom solid state relay (SSR) with SPST-NO (1 Form A) configuration in a hockey puck package. This active product operates as an AC output relay with a 40A load current capacity and 24-140V load voltage range. The relay features screw terminal connections and chassis mount configuration, making it suitable for industrial switching applications requiring solid state reliability.

Substitute parts are identified based on matching circuit topology (SPST-NO), output type (AC), package style (hockey puck), termination method (screw terminal), and mounting configuration (chassis mount), while accommodating variations in load current capacity and voltage ratings within acceptable operational parameters.

Key Parameters

Parameter	D1240-10 Specification
Manufacturer	Sensata-Crydom
Circuit Configuration	SPST-NO (1 Form A)
Output Type	AC
Input Voltage	3 ~ 32VDC
Load Voltage	24 V ~ 140 V
Load Current	40 A
Package / Case	Hockey Puck
Termination Style	Screw Terminal
Mounting Type	Chassis Mount
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the D1240-10 are qualified based on the following criteria:

Core Compatibility Requirements:

Circuit configuration: SPST-NO (1 Form A)
Output type: AC
Package style: Hockey puck
Termination: Screw terminal
Mounting: Chassis mount

Allowable Parameter Variations:

Load current: Equal to or greater than 40A
Load voltage range: Must encompass or exceed the 24-140V range of the main part
Input voltage: 3-32VDC or 4-32VDC acceptable
Product status: Active only

Three substitute parts meet these criteria with different electrical ratings and manufacturer sources.

Parameter Comparison

Parameter	D1240-10	84134220	84137320N	ASR-SI240D40RW-L
Manufacturer	Sensata-Crydom	Sensata-Crydom	Crouzet	Altran Magnetics, LLC
Series	1	GN	GN	SI
Circuit Configuration	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)	SPST-NO (1 Form A)
Output Type	AC	AC	AC	AC
Input Voltage	3 ~ 32VDC	3 ~ 32VDC	4 ~ 32VDC	4 ~ 32VDC
Load Voltage	24 V ~ 140 V	24 V ~ 280 V	48 V ~ 660 V	48 V ~ 280 V
Load Current	40 A	50 A	50 A	40 A
Package / Case	Hockey Puck	Hockey Puck	Hockey Puck	Hockey Puck
Termination Style	Screw Terminal	Screw Terminal	Screw Terminal	Screw Terminal
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

84134220 (Sensata-Crydom GN Series) This part maintains the same manufacturer and input voltage range (3-32VDC) as the D1240-10. It provides increased load current capacity (50A vs 40A) and extended load voltage range (24-280V vs 24-140V). ROHS3 compliance and REACH Affected status match the main part. This substitute offers direct compatibility with enhanced electrical specifications.

84137320N (Crouzet GN Series) This part provides the highest load voltage range (48-660V) and 50A current capacity. Input voltage minimum is 4VDC. RoHS compliance is confirmed, and REACH Unaffected status indicates no regulatory substance restrictions. This substitute is suitable for applications requiring extended voltage operation beyond the main part's 140V maximum.

ASR-SI240D40RW-L (Altran Magnetics SI Series) This part matches the 40A load current of the D1240-10 while providing extended load voltage range (48-280V). Input voltage range is 4-32VDC. ROHS3 compliance and REACH Unaffected status are confirmed. This substitute maintains current rating parity with the main part while offering increased voltage capability.

All substitute parts maintain active product status and are packaged in hockey puck configuration with screw terminals and chassis mount orientation.

Frequently Asked Questions (FAQ)

Q: Can 84134220 be used as a direct replacement for D1240-10? A: Yes. Both parts are Sensata-Crydom products with identical circuit configuration (SPST-NO), output type (AC), package (hockey puck), termination (screw terminal), and mounting (chassis mount). The 84134220 has higher current capacity (50A vs 40A) and wider load voltage range (24-280V vs 24-140V), making it compatible for D1240-10 applications.

Q: What is the primary difference between 84137320N and the other substitutes? A: The 84137320N is manufactured by Crouzet and provides the widest load voltage range (48-660V). Its minimum input voltage is 4VDC instead of 3VDC. It is REACH Unaffected, whereas D1240-10 and 84134220 are REACH Affected.

Q: Is ASR-SI240D40RW-L suitable for low-voltage applications? A: The ASR-SI240D40RW-L has a minimum load voltage of 48V, compared to D1240-10's 24V minimum. Applications requiring operation below 48V load voltage should use D1240-10 or 84134220 instead.

Q: Do all substitute parts have the same input voltage range? A: No. D1240-10 and 84134220 accept 3-32VDC input. Both 84137320N and ASR-SI240D40RW-L require 4-32VDC input. Applications using 3VDC input must use D1240-10 or 84134220.

Q: What is the difference in packaging between these parts? A: D1240-10 and all substitutes use hockey puck package with screw terminal connections and chassis mount configuration. D1240-10 is supplied in bulk packaging, while 84137320N and ASR-SI240D40RW-L are supplied in box packaging. 84134220 is supplied in bulk packaging.

Q: Are all parts RoHS compliant? A: Yes. D1240-10, 84134220, and ASR-SI240D40RW-L are ROHS3 Compliant. 84137320N is RoHS Compliant. All meet RoHS requirements.

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