Phoenix Contact 1780558 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1780558 is an 8-position terminal block plug with female sockets, 0.098" (2.50mm) pitch, designed for 180° free-hanging in-line applications. This component features IDC (Insulation Displacement Contact) termination and supports 4A at 125V per IEC standards. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and new designs requiring equivalent functionality.

Substiute Parts

1780558

Phoenix ContactIn Stock: 10081780558 Datasheet

Current PartRFQ

1778890

Phoenix ContactIn Stock: 10291778890 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1780558 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 8
• Pitch: 0.098" (2.50mm)
• Plug Wire Entry: 180°
• Mounting Type: Free Hanging (In-Line)
• Type: Plug, Female Sockets
• Manufacturer: Phoenix Contact

Allowable Parameter Variations:

• Termination Style: IDC substitutes may be replaced with Screwless - Spring Cage or Tension Clamp termination methods, provided mechanical and electrical compatibility is maintained
• Current Rating: Substitute parts may exceed the 4A IEC rating, as higher current capacity does not compromise system operation at lower current levels
• Voltage Rating: Substitute parts may exceed the 125V IEC rating, as higher voltage withstand capability does not compromise system operation at lower voltages
• Wire Gauge Range: Substitute parts with expanded wire gauge ranges (20-26 AWG or 0.14-0.5mm²) are compatible, provided the original wire gauge specification (22-24 AWG / 0.25-0.34mm²) falls within the substitute's range

The Phoenix Contact 1778890 meets all mandatory matching parameters and provides enhanced electrical ratings and termination flexibility, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 1778890 is the qualified substitute for the obsolete 1780558 based on the following engineering criteria:

Compliance and Regulatory Status: The 1778890 maintains RoHS3 compliance, exceeding the RoHS compliance level of the original part. Both components are classified under ECCN EAR99 and HTSUS 8536.90.4000, ensuring consistent export and tariff classification.

Product Lifecycle: The 1780558 is obsolete, creating supply chain risk. The 1778890 is active and maintains current manufacturing status, ensuring long-term availability and supply continuity.

Electrical Performance: The 1778890 provides enhanced electrical ratings (6A IEC / 320V IEC) compared to the 1780558 (4A IEC / 125V IEC). These increased ratings do not introduce incompatibility; systems designed for the original part's electrical specifications operate within the substitute's safe operating envelope.

Termination Technology: The 1778890 employs Screwless - Spring Cage, Tension Clamp termination, replacing the IDC termination of the original part. Both termination methods achieve equivalent mechanical and electrical connection integrity for the specified wire gauge range.

Wire Gauge Compatibility: The 1778890 accepts 20-26 AWG (0.14-0.5mm²), which encompasses the original specification of 22-24 AWG (0.25-0.34mm²). Existing wire harnesses designed for the 1780558 are compatible with the 1778890.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1778890 directly replace the 1780558 in existing applications?

A: Yes. The 1778890 matches all critical mechanical parameters (8 positions, 2.50mm pitch, 180° wire entry, free-hanging mounting) and maintains female socket configuration. The enhanced electrical ratings and active product status make it suitable for direct substitution in systems originally designed for the 1780558.

Q: What is the primary difference between the 1780558 and 1778890?

A: The main difference is termination technology. The 1780558 uses IDC (Insulation Displacement Contact) termination, while the 1778890 uses Screwless - Spring Cage, Tension Clamp termination. Both methods provide secure wire connections within the specified wire gauge range.

Q: Are there wire gauge compatibility concerns when substituting the 1778890 for the 1780558?

A: No. The 1780558 specifies 22-24 AWG (0.25-0.34mm²), and the 1778890 accepts 20-26 AWG (0.14-0.5mm²). The original wire gauge specification is fully contained within the substitute's acceptable range.

Q: Does the higher current and voltage rating of the 1778890 affect compatibility?

A: No. The 1778890 is rated for 6A at 320V (IEC), compared to the 1780558's 4A at 125V. Higher electrical ratings do not compromise operation at lower current and voltage levels. Systems designed for the original part operate safely within the substitute's specifications.

Q: What is the packaging difference between these parts?

A: The 1780558 is listed with no specified packaging designation, while the 1778890 is supplied in bulk packaging. This difference does not affect functional compatibility; it relates only to order quantity and delivery format.

Q: Is the 1778890 RoHS compliant?

A: Yes. The 1778890 is ROHS3 compliant, meeting current regulatory requirements. The original 1780558 is RoHS compliant, and the substitute maintains or exceeds this compliance level.

Q: Why is the 1780558 classified as obsolete?

A: The 1780558 is part of the COMBICON HD series, which has been superseded by newer Phoenix Contact terminal block families such as the COMBICON PTSM series (represented by the 1778890). Obsolescence reflects product lifecycle management and the availability of improved alternatives.