S228C Solid State Relay SPST-NO Module

Part Overview

The S228C is a solid state relay (SSR) module manufactured by Sensata-Crydom, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a 1 Form A circuit configuration. This chassis-mounted module is rated for 8A load current at 40-280V AC output with zero-cross switching capability. The product is currently obsolete, making identification of suitable substitute components necessary for ongoing maintenance, repair, and new design applications where equivalent functionality is required.

Substiute Parts

S228C

Sensata-CrydomIn Stock: 1152S228C Datasheet

Current PartRFQ

EZ240D12

Sensata TechnologiesIn Stock: 900EZ240D12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S228C is determined by compatibility across the following critical parameters:

• Circuit Configuration: Both main and substitute parts must maintain SPST-NO (1 Form A) topology to ensure identical switching behavior
• Output Characteristics: AC output with zero-cross switching capability must be preserved
• Load Voltage Range: The substitute must cover the required 40-280V operating window
• Load Current Capacity: The substitute must meet or exceed the 8A requirement
• Input Control Voltage: The substitute input range must accommodate the control signal source
• Mounting and Termination: Chassis mount configuration with quick-connect termination ensures mechanical and electrical compatibility

The EZ240D12 qualifies as a substitute based on these parameters, offering enhanced specifications while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The EZ240D12 is the identified substitute for the obsolete S228C based on functional and electrical equivalence. Selection should be based on the following factors:

Electrical Compatibility: The EZ240D12 maintains identical circuit topology (SPST-NO), output characteristics (AC, zero-cross), and load voltage range coverage. The expanded input voltage range (3-15VDC versus 4.6-8VDC) and increased current capacity (12A versus 8A) provide operational margin without compromising compatibility.

Product Status and Availability: The S228C is obsolete with no ongoing production. The EZ240D12 is an active product with current manufacturing and documented inventory availability.

Compliance and Certifications: Both parts share REACH Unaffected status and EAR99 ECCN classification. The EZ240D12 carries RoHS3 compliance, meeting current regulatory requirements.

Mechanical Considerations: The termination connector size differs (0.250" versus 0.187"). Applications using the S228C must evaluate whether existing quick-connect harnesses are compatible or require adaptation.

Frequently Asked Questions (FAQ)

Q: Can the EZ240D12 directly replace the S228C without any modifications?

A: The EZ240D12 is electrically equivalent and functionally compatible. However, the quick-connect termination size differs (0.250" versus 0.187"), requiring verification of connector compatibility with existing harnesses or mechanical adaptation.

Q: What is the significance of the expanded input voltage range in the EZ240D12?

A: The EZ240D12 input range of 3-15VDC encompasses the S228C range of 4.6-8VDC. This broader range provides flexibility for control circuits with varying supply voltages while maintaining compatibility with S228C control specifications.

Q: Does the higher current rating of the EZ240D12 (12A versus 8A) affect circuit behavior?

A: No. The 12A rating of the EZ240D12 represents increased capacity. Applications drawing 8A or less operate identically to the S228C. The higher rating does not alter switching characteristics or introduce incompatibility.

Q: Are there any compliance differences between the S228C and EZ240D12?

A: Both parts share REACH Unaffected and EAR99 classifications. The EZ240D12 additionally carries RoHS3 compliance, meeting current environmental standards. No compliance barriers exist for substitution.

Q: What load voltage range should be used for substitution planning?

A: Both parts operate across 40-280V. The EZ240D12 extends the lower limit to 24V, but applications using the S228C at 40-280V remain fully compatible.

Q: Is the EZ240D12 available in the same packaging as the S228C?

A: Both are module-type packages with chassis mount configuration. Termination connector size differs as noted. Verify mechanical fit within the application enclosure.