Phoenix Contact 2794974 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2794974 is a feed-through terminal block connector designed for 3-position applications with screw termination. This component operates at 60V UL and 30A current capacity, accommodating wire gauges from 10-26 AWG (0.2-4mm²). The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations.

Substiute Parts

2794974

Phoenix ContactIn Stock: 12292794974 Datasheet

Current PartRFQ

2906839

Phoenix ContactIn Stock: 7482906839 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2794974 terminal block is identified with substitute part number 2906839. However, a critical distinction exists in product categorization and functional design:

The main part (2794974) is classified as a Terminal Block connector with screw termination for direct wire connection in multi-position applications.

The substitute part (2906839) is classified as a Transient Voltage Suppressor (TVS) module designed for circuit protection on DIN rail mounting.

Substitution between these parts is not valid based on functional equivalence. The 2906839 serves a fundamentally different purpose—transient voltage suppression and circuit protection—rather than terminal block connectivity. The voltage and current parameters, while present in both parts, serve different operational contexts: the terminal block handles continuous operating conditions, while the TVS module addresses transient overvoltage events.

Key Parameters for Valid Substitution:

• Number of Positions / Poles
• Termination method (screw vs. module-based)
• Mounting configuration (panel vs. DIN rail)
• Continuous operating voltage and current ratings
• Wire gauge compatibility

The provided substitute does not align with these criteria.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 2794974 is obsolete. Direct functional replacement requires a terminal block connector with equivalent specifications:

• 3-position feed-through configuration
• Screw termination for 10-26 AWG wire
• 60V UL / 30A current rating
• 6.2mm terminal width
• Polyamide insulation with UL94 V-2 rating
• RoHS compliance

The listed substitute (2906839) does not fulfill these requirements due to fundamental category and functional differences. Selection of an alternative terminal block should prioritize matching the electrical ratings, wire gauge range, termination method, and mounting configuration of the original part.

For applications requiring both terminal connectivity and transient voltage protection, separate components—a terminal block and a TVS module—should be evaluated in series or parallel configuration as appropriate to the circuit design.

Frequently Asked Questions (FAQ)

Q: Can the 2906839 TVS module directly replace the 2794974 terminal block?

A: No. The 2906839 is a transient voltage suppressor module designed for DIN rail mounting and circuit protection, not a terminal block connector. It cannot perform the wire termination function of the 2794974.

Q: What makes a valid substitute for the 2794974?

A: A valid substitute must be a 3-position feed-through terminal block with screw termination, rated for 60V and 30A, accepting 10-26 AWG wire, with equivalent mechanical dimensions and insulation properties.

Q: Why is the 2794974 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Phoenix Contact. Existing inventory may be available through authorized distributors, but long-term availability is not guaranteed.

Q: Can the 2906839 be used alongside the 2794974 for enhanced protection?

A: Yes, if circuit design requires transient voltage suppression, the 2906839 TVS module can be integrated as a separate protective component. However, this represents a circuit enhancement, not a direct substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both the 2794974 and 2906839 are RoHS compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: What is the significance of the varistor feature in the 2794974?

A: The integrated varistor provides basic transient voltage suppression within the terminal block itself, offering localized protection at the connection point without requiring a separate protective module.