Sensata-Crydom S228 SSR Relay - Equivalent & Substitute Parts

Part Overview

The Sensata-Crydom S228 is a Solid State SPST-NO (1 Form A) relay module designed for AC load switching applications with zero-cross detection. This component operates with a 4.6–8VDC input and handles loads up to 8A at 40–280V. The S228 is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

S228

Sensata-CrydomIn Stock: 963S228 Datasheet

Current PartRFQ

EZ240D12

Sensata TechnologiesIn Stock: 900EZ240D12 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The EZ240D12 qualifies as a substitute for the S228 based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Circuit configuration: Both are SPST-NO (1 Form A) modules
• Output type: Both feature AC switching with zero-cross detection
• Load voltage range: Both support 40–280V operation (EZ240D12 extends to 24V minimum)
• Mounting type: Both are chassis-mount modules
• Termination style: Both use quick-connect terminals (connector size differs)
• Compliance: Both are REACH Unaffected

Differing Parameters:

• Input voltage: S228 operates 4.6–8VDC; EZ240D12 operates 3–15VDC
• Load current: S228 rated 8A; EZ240D12 rated 12A
• Connector size: S228 uses 0.187" (4.7mm); EZ240D12 uses 0.250" (6.3mm)
• Product status: S228 is obsolete; EZ240D12 is active
• RoHS compliance: EZ240D12 is ROHS3 compliant

Parameter Comparison

Engineering Selection Recommendations

The EZ240D12 is suitable as a substitute for the S228 in applications where the following conditions are met:

• The control circuit can supply input voltage within the 3–15VDC range of the EZ240D12
• The load current requirement does not exceed 12A (the EZ240D12 rating exceeds the S228 requirement of 8A)
• The load voltage range of 24–280V is acceptable (the S228 supports loads as low as 40V; the EZ240D12 extends to 24V)
• The connector size change from 0.187" to 0.250" quick-connect terminals can be accommodated through terminal adapter or harness modification
• Active product status and ROHS3 compliance of the EZ240D12 align with current manufacturing and regulatory requirements

Frequently Asked Questions (FAQ)

Q: Can the EZ240D12 directly replace the S228 without modifications?

A: Direct replacement requires connector adaptation. The S228 uses 0.187" (4.7mm) quick-connect terminals, while the EZ240D12 uses 0.250" (6.3mm) terminals. Harness modification or terminal adapters are necessary.

Q: What is the primary reason the S228 is being replaced?

A: The S228 is classified as obsolete. The EZ240D12 is an active product from the same manufacturer family, offering equivalent circuit functionality with enhanced current rating and extended input voltage range.

Q: Are there input voltage compatibility concerns?

A: The S228 operates at 4.6–8VDC, while the EZ240D12 operates at 3–15VDC. If the control circuit supplies voltage within 4.6–8VDC, both devices are compatible. If the control circuit supplies voltage above 8VDC but below 15VDC, only the EZ240D12 is suitable.

Q: Does the higher current rating of the EZ240D12 affect compatibility?

A: No. The EZ240D12 is rated for 12A, exceeding the S228 rating of 8A. In applications requiring 8A or less, the EZ240D12 operates within its specified range and is fully compatible.

Q: What is the significance of the load voltage range difference?

A: The S228 supports 40–280V loads; the EZ240D12 supports 24–280V loads. The EZ240D12 extends the lower voltage boundary to 24V, providing broader application coverage. Both devices support the full 40–280V range of the original S228.

Q: Are compliance certifications equivalent?

A: Both the S228 and EZ240D12 are REACH Unaffected. The EZ240D12 carries ROHS3 compliance, reflecting its active product status and alignment with current regulatory standards.