Phoenix Contact 2858140 Terminal Block - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 2858140 is a 4-position feed-through terminal block connector rated for 10-20 AWG wire gauge (0.5-4mm²). This component features push-in spring termination with integrated diode protection and is constructed from polyamide (PA) nylon material with UL94 V-0 flammability rating. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system maintenance and new designs.

Substiute Parts

2858140

Phoenix ContactIn Stock: 8482858140 Datasheet

Current PartRFQ

2906851

Phoenix ContactIn Stock: 9212906851 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Phoenix Contact 2906851 is identified as a substitute part. However, a critical functional distinction exists: the 2858140 is a terminal block connector designed for direct wire termination, while the 2906851 is a transient voltage suppressor (TVS) module for circuit protection. These components serve different primary functions within electrical systems.

Substitution logic is based on the following parameters:

• Manufacturer: Phoenix Contact (common source)
• RoHS Compliance: Both parts maintain RoHS compliance standards
• Operating Environment: Both rated for industrial temperature ranges
• Mounting Compatibility: Both support standard industrial installation methods
• Voltage Protection Capability: The 2906851 provides transient suppression at voltage levels relevant to low-voltage control circuits

The 2906851 cannot directly replace the 2858140 as a terminal block connector. Instead, it serves as a complementary protection component that may be integrated into systems where the 2858140 was previously used for feed-through connections.

Parameter Comparison

Engineering Selection Recommendations

The 2858140 is obsolete and no longer manufactured. The 2906851 is an active Phoenix Contact product with current availability and full compliance certifications (cCSAus, CSA, UL). However, functional equivalence must be evaluated based on system requirements:

For applications requiring direct wire termination in a 4-position feed-through configuration, alternative active terminal block connectors from Phoenix Contact's current product lines should be consulted, as the 2906851 serves a different functional purpose (transient voltage suppression).

For applications where transient voltage protection is required in addition to terminal connectivity, the 2906851 may be integrated as a complementary component alongside an active terminal block connector.

Frequently Asked Questions (FAQ)

Q: Can the 2906851 directly replace the 2858140 in existing installations?

A: No. The 2906851 is a transient voltage suppressor module, not a terminal block connector. Direct replacement is not functionally equivalent. The 2858140 provides wire termination; the 2906851 provides circuit protection.

Q: Why is the 2858140 listed as obsolete?

A: The 2858140 has been discontinued by Phoenix Contact. Current designs should reference active product alternatives from the manufacturer's terminal block portfolio.

Q: What compliance standards apply to both parts?

A: Both parts are RoHS compliant and carry EAR99 export classification. The 2906851 additionally holds UL, CSA, and cCSAus approvals.

Q: Can these parts be used together in a system?

A: Yes. The 2906851 can be integrated as a protection component in systems that also employ terminal block connectors for wire termination, provided the voltage and current ratings align with system requirements.

Q: What is the wire gauge compatibility of the 2858140?

A: The 2858140 accepts wire gauges from 10-20 AWG (0.5-4mm²) using push-in spring termination.