Phoenix Contact 1805944 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1805944 is a 4-position terminal block header with male pins, featuring a shrouded design and 0.138" (4.60mm) pitch for vertical through-hole mounting. This component is classified as obsolete, making identification of compatible alternatives essential for ongoing system maintenance and new design implementations. The part operates at 8A (IEC/UL) and 160V (IEC) / 300V (UL), designed for press-fit termination in the COMBICON EMCV series.

Substiute Parts

1805944

Phoenix ContactIn Stock: 9081805944 Datasheet

Current PartRFQ

1843635

Phoenix ContactIn Stock: 15181843635 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for terminal block headers is determined by the following critical parameters:

• Pitch (0.138" / 4.60mm): Must match exactly to ensure mechanical and electrical compatibility with mating connectors and PCB layouts
• Header Orientation (Vertical): Determines mounting configuration and spatial requirements
• Type (Male Pins, Shrouded 4 Side): Ensures proper mating interface and EMC shielding characteristics
• Mounting Type (Through Hole): Confirms PCB assembly compatibility
• Current Rating (8A minimum): Electrical capacity for circuit operation
• Voltage Rating (160V IEC minimum / 300V UL): Insulation and safety compliance thresholds
• Contact Mating Finish (Tin): Ensures reliable electrical contact and corrosion resistance

The Phoenix Contact 1843635 shares the same pitch, header orientation, shrouded male pin configuration, through-hole mounting, and electrical ratings (8A / 300V UL). However, it differs in position count (5 vs. 4), termination style (solder vs. press-fit), series designation (COMBICON MCV vs. EMCV), and product status (active vs. obsolete). These differences require engineering evaluation for specific application contexts.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 1805944 is obsolete, while the 1843635 is active and in current production. For new designs or system replacements, the 1843635 represents the current Phoenix Contact offering in the COMBICON terminal block family.

Electrical Compatibility: Both parts meet the 8A current requirement and 300V UL voltage specification. The 1843635 exceeds the IEC voltage rating (250V vs. 160V), providing additional safety margin for IEC-regulated applications.

Compliance and Certifications: The 1843635 includes RoHS3 compliance and UL94 V-0 flammability certification, meeting modern regulatory requirements. The 1805944 specifications do not include these certifications.

Mechanical and Dimensional Factors: Pitch, orientation, shrouded design, and insulation height are identical between both parts. The contact tail length difference (0.150" vs. 0.134") is minor and typically accommodated by standard PCB through-hole tolerances. However, this should be verified against specific PCB design specifications.

Termination Method Difference: The 1805944 uses press-fit termination, while the 1843635 uses solder termination. This represents a fundamental assembly process difference that must align with manufacturing capabilities and design intent.

Position Count Variance: The 1843635 provides 5 positions versus the 1805944's 4 positions. Applications requiring exactly 4 positions may require design modification or use of only 4 of the 5 available positions, depending on circuit requirements and mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1843635 directly replace the 1805944 in existing designs?

A: Direct replacement requires verification of three factors: (1) PCB layout accommodation of the 5-position header versus the original 4-position design, (2) assembly process compatibility with solder termination versus press-fit, and (3) mechanical fit validation of the 0.134" contact tail length against PCB specifications. Electrical ratings are compatible.

Q: What is the significance of the pitch specification in terminal block substitution?

A: Pitch (0.138" / 4.60mm) determines the spacing between contact positions and is critical for mating connector compatibility. Any deviation prevents proper mating and creates electrical and mechanical failure risk. Both parts share identical pitch, ensuring connector compatibility.

Q: Does the color difference between black (1805944) and green (1843635) affect functionality?

A: Color is a visual identifier and does not affect electrical or mechanical performance. However, color coding may be used in system documentation or assembly procedures, requiring process updates if substitution occurs.

Q: Why is the 1843635 rated at 250V IEC while the 1805944 is rated at 160V IEC?

A: The higher IEC voltage rating reflects design improvements or different insulation specifications in the newer COMBICON MCV series. This provides additional safety margin for IEC-regulated applications and does not create compatibility issues for circuits designed for 160V operation.

Q: What does "obsolete" status mean for the 1805944?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through authorized distributors, but long-term supply cannot be guaranteed. The 1843635 represents the current production alternative within the Phoenix Contact COMBICON terminal block portfolio.

Q: Are there any compliance differences between the two parts?

A: The 1843635 includes RoHS3 compliance and UL94 V-0 flammability certification. The 1805944 specifications do not document these certifications. For applications requiring RoHS or flammability compliance, the 1843635 is the appropriate selection.

Q: How does the termination style difference affect PCB assembly?

A: Press-fit termination (1805944) uses mechanical insertion without solder, while solder termination (1843635) requires thermal reflow or wave soldering. Manufacturing equipment, process parameters, and quality control procedures differ between these methods. Assembly capability must be confirmed before substitution.