Equivalent & Substitute Parts for 90SST240

Part Overview

The 90SST240 is a solid state relay (SSR) manufactured by Sensata Technologies, configured as a SPST-NO (1 Form A) device in a hockey puck package. This component is designed for AC load switching applications with a rated load current of 90 A and load voltage range of 180 V to 280 V. The product is classified as obsolete, making identification of suitable substitute components necessary for ongoing system maintenance and new procurement requirements.

Substiute Parts

90SST240

Sensata TechnologiesIn Stock: 98090SST240 Datasheet

Current PartRFQ

ASO241

Sensata-CrydomIn Stock: 1255ASO241 Datasheet

MFR RecommendedRFQ

MCST2490CS

Sensata-CrydomIn Stock: 835MCST2490CS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 90SST240 is determined by the following critical parameters:

• Circuit configuration (SPST-NO)
• Load current capacity (90 A minimum)
• Load voltage range (180 V – 280 V minimum coverage)
• Input voltage compatibility (4.6 V – 10 VDC range)
• Mounting type (chassis mount)
• Package form factor (hockey puck)
• Output type (AC switching capability)

The substitute parts identified are:

MCST2490CS – Direct functional equivalent with identical load current (90 A) and voltage specifications. Maintains chassis mount hockey puck form factor with screw terminal termination. Classified as "Not For New Designs" but functionally compatible.

ASO241 – Functionally limited substitute. While it maintains SPST-NO configuration and AC output capability, the load current rating (1.5 A) is significantly below the 90 A requirement of the main part. This component is suitable only for applications requiring substantially lower current switching.

Parameter Comparison

Engineering Selection Recommendations

MCST2490CS is the primary substitute for direct replacement applications. This component maintains identical load current (90 A) and voltage specifications (180 V – 280 V), identical mounting type (chassis mount), and identical package form factor (hockey puck). The primary differences are termination style (screw terminal versus quick connect) and product status classification (Not For New Designs). The screw terminal termination requires mechanical interface modification. RoHS compliance status is available for this substitute.

ASO241 is not suitable as a direct substitute due to insufficient load current capacity (1.5 A versus 90 A requirement). This component is applicable only to applications with substantially different current requirements and should not be considered for systems designed around the 90 A specification of the 90SST240.

For new design implementations, MCST2490CS remains the only functionally equivalent option within the provided substitute list, despite its "Not For New Designs" classification. ASO241 represents a different product category due to its current rating limitation.

Frequently Asked Questions (FAQ)

Q: Can ASO241 replace the 90SST240 in existing applications?

A: No. The ASO241 has a maximum load current rating of 1.5 A, while the 90SST240 is rated for 90 A. Using ASO241 in a 90 A application would result in component failure. ASO241 is applicable only to applications with substantially lower current requirements.

Q: What is the primary difference between 90SST240 and MCST2490CS?

A: Both components have identical electrical specifications (90 A load current, 180 V – 280 V load voltage range, SPST-NO configuration, AC output). The primary differences are: termination style (quick connect versus screw terminal), product status (obsolete versus not for new designs), and RoHS compliance documentation. Mechanical interface modification is required to accommodate the different termination styles.

Q: Does MCST2490CS require circuit modifications for installation?

A: The screw terminal termination of MCST2490CS differs from the quick connect termination of 90SST240. Mechanical interface adaptation is necessary. Electrical specifications remain compatible.

Q: Are there compliance differences between these components?

A: MCST2490CS is RoHS Compliant. The 90SST240 does not specify RoHS status in available documentation. Both components are classified as REACH Unaffected or REACH Affected respectively, and both carry ECCN classification EAR99.

Q: What is the significance of the "Not For New Designs" status of MCST2490CS?

A: This classification indicates the component is available for replacement and maintenance applications but is not recommended for new product development. For legacy system maintenance where 90SST240 is no longer available, MCST2490CS remains the functionally equivalent option.