LC242 Solid State Relay SPST-NO 2A 12-280V Equivalent & Substitute Parts

Part Overview

The LC242 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 a 12V to 280V AC output range. The device operates with a 4-10VDC input signal and features zero-cross switching for AC loads. The LC242 is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

LC242

Sensata-CrydomIn Stock: 822LC242 Datasheet

Current PartRFQ

ASO242

Sensata TechnologiesIn Stock: 1299ASO242 Datasheet

DirectRFQ

SSRA-240D2

TE Connectivity Potter & Brumfield RelaysIn Stock: 739SSRA-240D2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LC242 is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPST-NO)
• Output type (AC with zero-cross switching)
• Input voltage range (4-10VDC)
• Load current rating (2A)
• Package type (4-SIP)
• Termination style (PC Pin)
• Mounting method (Through Hole)

Two substitute parts meet these criteria with documented compatibility:

Direct Equivalent: ASO242 (Sensata Technologies) maintains identical electrical specifications and packaging.

Similar Equivalent: SSRA-240D2 (TE Connectivity Potter & Brumfield Relays) matches all critical parameters with a load voltage range of 24V-280V, representing a subset of the LC242's 12V-280V range.

Parameter Comparison

Engineering Selection Recommendations

ASO242 is the preferred direct substitute for LC242 replacement applications. Both parts are manufactured by Sensata entities with identical electrical and mechanical specifications. ASO242 carries active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs.

SSRA-240D2 is suitable for applications where the minimum load voltage requirement is 24V or higher. This part maintains all critical switching characteristics and current ratings but operates within a restricted load voltage window. SSRA-240D2 is manufactured by TE Connectivity with active status and ROHS3 compliance.

Selection between ASO242 and SSRA-240D2 depends solely on the minimum load voltage requirement of the application. If the circuit requires operation below 24V, ASO242 is mandatory. If minimum load voltage is 24V or above, both parts are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can ASO242 directly replace LC242 in existing designs? A: Yes. ASO242 maintains identical input voltage range (4-10VDC), load voltage range (12-280V), load current (2A), circuit configuration (SPST-NO), output type (AC zero-cross), package (4-SIP), and termination style (PC Pin). No circuit modifications are required.

Q: What is the key difference between ASO242 and SSRA-240D2? A: The load voltage range differs. ASO242 operates from 12V to 280V, while SSRA-240D2 operates from 24V to 280V. All other electrical and mechanical parameters are identical. Selection depends on whether the application requires operation below 24V load voltage.

Q: Are both substitute parts available in the same packaging? A: Both ASO242 and SSRA-240D2 use 4-SIP package with PC Pin termination, compatible with through-hole PCB mounting. ASO242 is supplied in Tube packaging, while SSRA-240D2 is supplied in Bulk packaging.

Q: Do the substitute parts meet current regulatory requirements? A: Yes. Both ASO242 and SSRA-240D2 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The LC242 status is not specified for these certifications.

Q: What is the inventory status of substitute parts? A: ASO242 has 1241 pieces in stock. SSRA-240D2 has 725 pieces in stock. Both are classified as active products with ongoing availability.