Phoenix Contact 2902970 SSR Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2902970 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 DIN rail mounting and operates with a 24VDC input signal to control DC loads between 4V and 30V at 50mA maximum current. The part is classified as obsolete, making identification of suitable substitute components essential for system maintenance and new design implementations.

Substiute Parts

2902970

Phoenix ContactIn Stock: 11132902970 Datasheet

Current PartRFQ

2902974

Phoenix ContactIn Stock: 9182902974 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 2902970 is determined by the following critical parameters:

• Circuit configuration must remain SPST-NO (1 Form A)
• Output type must be DC
• Input voltage must be 24VDC
• Load current rating must be 50mA
• Mounting type must be DIN Rail
• Termination style must be Spring Terminal
• Series must be PLC-OPT

The Phoenix Contact 2902974 qualifies as a substitute based on these criteria. The primary difference is the load voltage range specification: the 2902974 operates within 14V ~ 30V versus the original 4V ~ 30V. This represents a narrower operating window that is compatible with applications requiring minimum load voltages of 14V or higher.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2902974 is the designated substitute for the obsolete 2902970 within the PLC-OPT series. The 2902974 maintains active product status and meets current ROHS3 compliance requirements, making it suitable for new installations and system replacements.

Selection of the 2902974 is appropriate when the application load voltage requirement is 14V or higher. The narrower voltage range of the 2902974 does not impact functionality in systems designed for this minimum threshold. Both components share identical input voltage, load current, circuit configuration, and mechanical mounting specifications.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 2902974 replace the 2902970 in all applications?

A: The 2902974 is a suitable substitute provided the load voltage in your application is 14V or higher. If your system requires operation below 14V, the 2902974 will not function as intended. The original 2902970 supports loads as low as 4V.

Q: What is the primary difference between these two parts?

A: The load voltage operating range differs. The 2902970 operates from 4V to 30V, while the 2902974 operates from 14V to 30V. All other electrical and mechanical specifications are identical.

Q: Why is the 2902970 listed as obsolete?

A: The 2902970 has been discontinued by Phoenix Contact. The 2902974 represents the current active product offering within the PLC-OPT series for this relay configuration.

Q: Are there any compliance differences between these parts?

A: The 2902970 is RoHS Compliant, while the 2902974 is ROHS3 Compliant, representing updated environmental compliance standards. The 2902974 also carries REACH Affected status.

Q: Do both parts use the same mounting and termination methods?

A: Yes. Both the 2902970 and 2902974 mount on DIN rail and use spring terminal connections, ensuring mechanical compatibility in existing installations.

Q: What load current do these relays support?

A: Both the 2902970 and 2902974 are rated for a maximum load current of 50mA at the specified voltage ranges.