Phoenix Contact 1859577 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1859577 is an 8-position terminal block header with male pins, shrouded on four sides, featuring 0.200" (5.08mm) pitch spacing for vertical through-hole mounting. This component is part of the COMBICON EMSTBVA series and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from the active COMBICON product lines are available to maintain design compatibility and ensure continued supply chain availability.

Substiute Parts

1859577

Phoenix ContactIn Stock: 7361859577 Datasheet

Current PartRFQ

1755794

Phoenix ContactIn Stock: 370591755794 Datasheet

SimilarRFQ

1955918

Phoenix ContactIn Stock: 9931955918 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1859577 is determined by the following core parameters:

• Number of Positions: Must be 8
• Pitch: Must be 0.200" (5.08mm)
• Header Orientation: Must be Vertical
• Type: Must be Header with Male Pins, Shrouded (4 Side)
• Mounting Type: Must be Through Hole
• Electrical Performance: Current rating of 12A (IEC) and voltage rating of at least 300V (UL) or 320V (IEC)
• Material Flammability: UL94 V-0 rating
• Moisture Sensitivity: MSL 1 (Unlimited)

The substitute parts 1755794 and 1955918 meet these core substitution criteria. Variations in termination style (press-fit versus solder), housing material composition, and voltage ratings above the minimum threshold do not preclude substitution when the primary functional and electrical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Part 1755794 is the primary substitute for the Phoenix Contact 1859577. Both parts maintain identical pitch spacing (5.08mm), position count (8), and insulation height (12.00mm). The 1755794 is active in production with significantly higher inventory availability (36,949 units in stock versus 724 units for the obsolete 1859577). The primary design consideration is the termination style change from press-fit to solder, which requires PCB layout modification. The 1755794 offers enhanced voltage rating (630V IEC versus 320V IEC) and maintains full UL and IEC compliance with ROHS3 certification.

Part 1955918 serves as an alternative substitute when specific design constraints favor its characteristics. This part maintains the same 8-position, 5.08mm pitch configuration and meets all core electrical requirements. The 1955918 features a shorter contact tail length (2.60mm versus 3.90mm), which may be advantageous in space-constrained applications. However, the UL current rating is reduced to 10A compared to the 12A rating of the main part and 1755794. The housing material (Liquid Crystal Polymer) and black color differentiate this option for applications requiring specific material properties or visual identification.

Both substitute parts carry active product status, ensuring long-term supply chain stability and compliance with current regulatory standards (ROHS3, REACH Unaffected).

Frequently Asked Questions (FAQ)

Q: Can I directly replace Phoenix Contact 1859577 with 1755794 without PCB modifications?

A: No. The primary difference is termination style: 1859577 uses press-fit termination while 1755794 uses solder termination. Press-fit components require plated through-holes with specific hole diameters and tolerances, whereas solder termination requires standard PCB pads. PCB layout modification is necessary.

Q: What is the key difference between 1755794 and 1955918?

A: Both are solder-terminated 8-position headers with 5.08mm pitch. The 1755794 has a contact tail length of 3.90mm and maintains 12A UL current rating. The 1955918 has a shorter contact tail length of 2.60mm and a reduced UL current rating of 10A. Housing materials also differ: 1755794 uses Polyamide (PA/Nylon) while 1955918 uses Liquid Crystal Polymer (LCP).

Q: Are all three parts RoHS compliant?

A: Yes. The main part 1859577 is RoHS Compliant. Both substitute parts 1755794 and 1955918 are ROHS3 Compliant, which represents the current regulatory standard.

Q: Does the voltage rating difference affect substitution eligibility?

A: No. Both substitute parts exceed the minimum voltage requirements of the main part. The 1755794 provides 630V (IEC) and 1955918 provides 400V (IEC), both exceeding the original 320V (IEC) specification. All three parts meet the 300V (UL) requirement.

Q: What is the inventory status of these parts?

A: The main part 1859577 (obsolete) has 724 units in stock. Substitute 1755794 (active) has 36,949 units available. Substitute 1955918 (active) has 886 units available. The significantly higher inventory of 1755794 reflects its active production status.

Q: Can I use 1955918 if my application requires 12A current?

A: No. The 1955918 has a UL current rating of 10A, which is below the 12A requirement of the original part. Use 1755794 instead, which maintains the 12A UL current rating.

Q: Are there any compliance certifications I should verify before selection?

A: All three parts carry UL94 V-0 material flammability rating and MSL 1 (Unlimited) moisture sensitivity level. The substitute parts include REACH Unaffected status, confirming compliance with current chemical regulations. Verify your specific application requirements against the provided electrical ratings and material specifications.