CASO242R Solid State Relay SPST-NO 2A 12-280V Equivalent & Substitute Parts

Part Overview

The CASO242R is a solid state relay (SSR) manufactured by Sensata-Crydom, configured as a single-pole single-throw normally open (SPST-NO) device rated for 2A load current across 12V to 280V AC output. This component features a 4-10VDC input control voltage and through-hole PC pin termination in a 4-SIP package configuration.

The CASO242R is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay architecture.

Substiute Parts

CASO242R

Sensata-CrydomIn Stock: 850CASO242R Datasheet

Current PartRFQ

ASO242R

Sensata-CrydomIn Stock: 1237ASO242R Datasheet

DirectRFQ

ASO242R

Sensata-CrydomIn Stock: 1237ASO242R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CASO242R is determined by strict equivalence across the following critical parameters:

• Circuit configuration: SPST-NO (1 Form A)
• Output type: AC
• Input voltage range: 4 ~ 10VDC
• Load voltage range: 12 V ~ 280 V
• Load current rating: 2 A
• Mounting type: Through Hole
• Termination style: PC Pin
• Package / Case: 4-SIP or compatible mini-SIP variant

The ASO242R, manufactured by Sensata-Crydom, meets all electrical and mechanical substitution criteria. This part maintains identical circuit topology, voltage ratings, current capacity, and physical form factor compatibility. The ASO242R is classified as active product status, providing ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The ASO242R is the direct functional equivalent for CASO242R applications. Both parts share identical electrical specifications across input control voltage, output load voltage range, and current capacity. The ASO242R provides the additional advantage of active product status, ensuring continued manufacturer support and supply availability.

The ASO242R carries ROHS3 compliance certification, meeting current environmental and regulatory standards. The CASO242R does not specify RoHS status. For new designs or systems requiring regulatory compliance documentation, the ASO242R is the appropriate selection.

Both parts maintain REACH Unaffected status and EAR99 export classification. The package form factor difference (4-SIP versus 4-Mini SIP) does not affect electrical performance or through-hole mounting compatibility on standard PCB layouts designed for 4-SIP footprints.

Frequently Asked Questions (FAQ)

Q: Can ASO242R directly replace CASO242R in existing circuit designs?

A: Yes. The ASO242R meets all electrical and mechanical specifications required for CASO242R applications. Input voltage, output voltage range, current rating, circuit topology, and physical mounting are identical. PCB footprints designed for 4-SIP through-hole mounting accommodate the ASO242R without modification.

Q: What is the difference between 4-SIP and 4-Mini SIP packaging?

A: Both designations refer to 4-pin single in-line package configurations with through-hole PC pin termination. The Mini SIP variant maintains the same electrical interface and pin spacing as standard 4-SIP, ensuring compatibility with existing PCB layouts and socket designs.

Q: Why is CASO242R classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. The ASO242R represents the active equivalent within the Sensata-Crydom product line, providing identical functionality with ongoing production and supply chain support.

Q: Does ASO242R require any circuit modifications for CASO242R replacement?

A: No circuit modifications are required. Electrical specifications, control voltage thresholds, load current capacity, and output voltage range are identical. Direct pin-for-pin substitution is applicable.

Q: What compliance certifications apply to ASO242R?

A: ASO242R carries ROHS3 compliance certification and maintains REACH Unaffected status. Both parts share EAR99 export classification. Compliance documentation should be obtained from the manufacturer for specific regulatory requirements.