Phoenix Contact 2794903 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2794903 is a feed-through terminal block connector with 3 positions, designed for wire gauges 10-26 AWG (0.2-4mm²). This component features screw termination, integrated varistor protection, and operates at 24V UL with a 30A current rating. The product is classified as obsolete, making identification of compatible substitute components essential for system maintenance and component sourcing.

Substiute Parts

2794903

Phoenix ContactIn Stock: 9512794903 Datasheet

Current PartRFQ

2906837

Phoenix ContactIn Stock: 9922906837 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2794903 integrates terminal block connectivity with transient voltage suppression through its built-in varistor feature. Substitute components must satisfy the following criteria:

Critical Substitution Parameters:

• Voltage rating: 24V UL minimum
• Current capacity: 30A minimum
• Protection mechanism: Varistor or equivalent transient suppression
• Compliance: ROHS3 and UL certifications
• Operating temperature range: Compatible with industrial applications

The identified substitute, Phoenix Contact 2906837 (TTC-6-MOV-C-24DC-UT-I), is a transient voltage suppressor module rated for 24VDC continuous operation with 30VDC maximum rating. This component provides the protective function integrated within the original terminal block through a dedicated module approach, suitable for applications requiring modular circuit protection architecture.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The Phoenix Contact 2906837 is suitable as a substitute when the application architecture permits transition from integrated terminal block protection to modular circuit protection. Both components are ROHS3 compliant and manufactured by Phoenix Contact, ensuring regulatory consistency.

Compliance Considerations:

• The 2906837 carries explicit UL approval alongside CSA certifications, providing documented compliance for North American and Canadian markets
• Both components maintain ROHS3 compliance status
• The 2906837 specifies operating temperature range (-40°C ~ 85°C), enabling verification of thermal compatibility with target applications

Architectural Differences: The 2794903 integrates protection within the terminal block assembly, while the 2906837 functions as a standalone DIN rail-mounted module. System design must accommodate this architectural change, including physical layout and electrical integration modifications.

Frequently Asked Questions (FAQ)

Q: Can the 2906837 directly replace the 2794903 in existing installations? A: Direct mechanical replacement is not possible due to different mounting types (screw terminal vs. DIN rail). Electrical substitution requires system redesign to accommodate modular protection architecture.

Q: What is the significance of the product status difference? A: The 2794903 is obsolete, indicating discontinued manufacturing and limited availability. The 2906837 is active production, ensuring long-term supply chain reliability and technical support.

Q: Are both components suitable for 24V DC applications? A: Yes. The 2794903 operates at 24V UL, and the 2906837 is rated for 30VDC maximum continuous operating voltage (MCOV 21VAC, 30VDC), providing compatible voltage specifications.

Q: What certifications apply to both components? A: Both are ROHS3 compliant. The 2906837 additionally specifies UL, CSA, and CSAus approvals. Verify specific certification requirements for your application jurisdiction.

Q: How do the protection mechanisms differ? A: The 2794903 uses an integrated varistor for transient suppression within the terminal block. The 2906837 is a dedicated transient voltage suppressor module, requiring separate installation in the circuit protection architecture.

Q: What packaging considerations apply? A: The 2794903 is supplied as a complete terminal block assembly. The 2906837 is supplied as a module-only form factor, requiring integration into a DIN rail-mounted enclosure or protection circuit.