Phoenix Contact 1859593 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1859593 is a 10-position terminal block header with male pins, shrouded on four sides, featuring 0.200" (5.08mm) pitch spacing and vertical through-hole mounting. This component is part of the COMBICON EMSTBVA series and is currently classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for ongoing system maintenance, repair, and new design implementations where this connector type is required.

Substiute Parts

1859593

Phoenix ContactIn Stock: 8831859593 Datasheet

Current PartRFQ

1755817

Phoenix ContactIn Stock: 18711755817 Datasheet

SimilarRFQ

1955934

Phoenix ContactIn Stock: 7581955934 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1859593 is determined by the following critical parameters:

• Position Count & Pitch: All substitute parts must maintain 10 positions at 0.200" (5.08mm) pitch spacing to ensure mechanical and electrical compatibility with mating connectors.
• Header Type & Orientation: Vertical orientation with male pins and four-side shrouding is required for form-factor compatibility.
• Electrical Ratings: Substitute parts must meet or exceed the IEC and UL voltage and current specifications (320V IEC / 300V UL minimum, 12A minimum).
• Mounting Configuration: Through-hole mounting is mandatory for PCB integration compatibility.
• Flammability & Compliance: UL94 V-0 rating and RoHS compliance are baseline requirements for safety and regulatory adherence.

The two substitute parts identified—Phoenix Contact 1755817 and 1955934—satisfy these core substitution criteria while offering active product status and enhanced electrical performance in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

Phoenix Contact 1755817 is the primary substitute for the 1859593. This part maintains identical mechanical dimensions (contact tail length 0.154", insulation height 0.472"), identical electrical ratings under UL standards (12A, 300V), and exceeds IEC voltage specifications (630V versus 320V). The transition from press-fit to solder termination requires PCB design modification but is a standard engineering practice. Housing material changes from PBT to polyamide (PA/nylon), and the part holds active product status with ROHS3 compliance, ensuring long-term availability and supply chain stability.

Phoenix Contact 1955934 serves as a secondary substitute with enhanced IEC voltage rating (400V) and alternative housing material (liquid crystal polymer). However, this part features a reduced contact tail length (0.102" versus 0.154"), which may require PCB footprint adjustment. UL current rating is reduced to 10A, making this option suitable only for applications where the 12A UL specification is not a binding requirement. Active product status and RoHS compliance are maintained.

Selection between 1755817 and 1955934 depends on PCB layout constraints and specific electrical requirements. For direct replacement with minimal design changes, 1755817 is preferred. For applications with higher IEC voltage requirements and flexible PCB footprints, 1955934 is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 1859593 be directly replaced with 1755817 without PCB modifications?

A: Mechanical compatibility is maintained (identical pitch, position count, insulation height, and contact tail length). The primary design change is termination style: the 1859593 uses press-fit termination, while 1755817 requires solder termination. PCB pad design must be modified accordingly. Electrical specifications remain compatible under both IEC and UL standards.

Q: What is the difference between press-fit and solder termination?

A: Press-fit termination uses mechanical insertion into plated through-holes, while solder termination requires thermal bonding to PCB pads. Solder termination typically provides superior mechanical strength and is the industry standard for high-reliability applications. Press-fit termination offers faster assembly but is less common in modern designs.

Q: Is 1955934 compatible with the same PCB footprint as 1859593?

A: No. The 1955934 has a contact tail length of 0.102" compared to 0.154" for the 1859593. This 0.052" difference requires PCB pad repositioning. Insulation height remains identical at 0.472", so vertical clearance is unaffected.

Q: What are the electrical differences between the three parts?

A: All three parts meet the 300V UL and 12A UL baseline. The 1859593 and 1755817 are electrically equivalent under UL standards. The 1755817 exceeds IEC specifications (630V versus 320V). The 1955934 meets IEC 400V and UL 300V but has reduced UL current rating (10A versus 12A).

Q: Are there supply chain advantages to using 1755817 or 1955934?

A: Yes. Both substitute parts hold active product status, ensuring continued manufacturing and availability. The 1859593 is obsolete and subject to supply discontinuation. 1755817 has higher inventory levels (1762 pcs) compared to 1955934 (694 pcs), making it the more reliable long-term choice.

Q: Do housing material differences affect electrical performance?

A: Housing material changes (PBT to polyamide for 1755817, PBT to LCP for 1955934) do not affect core electrical ratings. All three materials maintain UL94 V-0 flammability compliance. Material selection impacts thermal properties and mechanical durability but not voltage or current capacity.