Phoenix Contact 2954277 SSR Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2954277 is a solid-state relay (SSR) module configured as SPST-NO (Single Pole Single Throw - Normally Open) with a 1 Form A circuit. This component is designed for AC load switching applications with input voltage of 120VAC and output load voltage range of 48V to 280V at 3A capacity. The module features DIN Rail mounting and screw terminal connections.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement, repair, and new installations where this legacy component is specified.

Substiute Parts

2954277

Phoenix ContactIn Stock: 11232954277 Datasheet

Current PartRFQ

2900372

Phoenix ContactIn Stock: 7362900372 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 2954277 is determined by the following critical parameters:

• Circuit Configuration: Must maintain SPST-NO (1 Form A) topology for direct functional replacement
• Output Type: AC output capability required for load switching applications
• Mounting Type: DIN Rail mounting ensures mechanical compatibility with existing installations
• Load Voltage Range: Substitute must accommodate the 48V to 280V operating window
• Load Current Capacity: Minimum 3A rating required; lower current ratings are not acceptable substitutes
• Input Voltage Compatibility: 120VAC input or dual voltage (120VAC/DC) input acceptable
• Termination Style: Screw terminal or spring terminal acceptable for connection compatibility
• Compliance: RoHS compliance required for regulatory alignment

The Phoenix Contact 2900372 qualifies as a substitute based on matching circuit configuration, output type, DIN Rail mounting, and RoHS compliance. However, critical differences exist in load current capacity and load voltage range that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2900372 is an active product with current manufacturing status and ROHS3 compliance, providing supply chain continuity for the obsolete 2954277. Both components share identical circuit topology (SPST-NO), output type (AC), and DIN Rail mounting architecture.

Selection of the 2900372 as a substitute requires evaluation of the following parameter deviations:

• Load Current Reduction: The 2900372 provides 750mA maximum load current versus 3A for the 2954277. Applications requiring the full 3A capacity cannot use this substitute.
• Load Voltage Range Reduction: The 2900372 operates across 24V to 253V, which does not fully cover the 48V to 280V range of the original part. Applications requiring operation above 253V or below 24V cannot use this substitute.
• Input Voltage Enhancement: The 2900372 accepts both 120VAC and DC input, providing greater flexibility than the 120VAC-only input of the 2954277.
• Termination Difference: Spring terminal connection on the 2900372 differs from screw terminal on the 2954277, requiring panel or wiring modifications.

The 2900372 is suitable only for applications where load current does not exceed 750mA and load voltage remains within the 24V to 253V range.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2900372 directly replace the 2954277 in all applications?

A: No. The 2900372 has reduced load current capacity (750mA vs. 3A) and a narrower load voltage range (24V–253V vs. 48V–280V). Direct replacement is only possible in applications that operate within these reduced specifications.

Q: What is the primary reason the 2954277 requires a substitute?

A: The 2954277 is classified as obsolete, meaning Phoenix Contact has discontinued manufacturing. The 2900372 is an active product that provides functional equivalence within its specified parameter limits.

Q: Are there any compatibility issues with termination style differences?

A: Yes. The 2954277 uses screw terminals while the 2900372 uses spring terminals. This requires modification to the connection method and may necessitate panel rewiring or adapter solutions.

Q: Does the 2900372 meet the same compliance standards?

A: Both parts are RoHS compliant. The 2900372 carries ROHS3 certification, which represents a more current compliance standard than the RoHS Compliant designation of the 2954277.

Q: Can the 2900372 accept DC input like the 2954277?

A: The 2954277 is specified for 120VAC input only. The 2900372 accepts both 120VAC and DC input, providing broader input voltage flexibility.

Q: What should be verified before selecting the 2900372 as a substitute?

A: Confirm that the application load current does not exceed 750mA and that the load voltage operates within the 24V to 253V range. Verify that spring terminal connections are compatible with the installation method.