Phoenix Contact 1937583 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937583 is an 11-position terminal block header with male pins, shrouded design, and 4.6mm pitch in a 90° right-angle through-hole configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates at 8A per position (IEC) and 250V (IEC), with UL ratings of 8A and 300V, suitable for industrial control and power distribution applications.

Substiute Parts

1937583

Phoenix ContactIn Stock: 11951937583 Datasheet

Current PartRFQ

1788686

Phoenix ContactIn Stock: 11471788686 Datasheet

SimilarRFQ

0395021011

MolexIn Stock: 23260395021011 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937583 is determined by strict alignment with the following critical parameters:

• Electrical Compatibility: Current rating of 8A minimum (IEC or UL), voltage rating of 250V minimum (IEC) or 300V (UL)
• Physical Compatibility: 11 positions, 4.6mm pitch, 90° right-angle orientation, through-hole mounting
• Connector Type: Male pins with shrouded (4-side) design
• Termination: Solder termination only
• Regulatory Compliance: UL94 V-0 flammability rating, RoHS compliance

Both identified substitute parts meet these core substitution criteria. The Phoenix Contact 1788686 is an active-status variant within the same COMBICON MC series. The Molex 0395021011 represents a cross-manufacturer equivalent from the Eurostyle ESE 39502 series, offering functional and electrical equivalence with different housing material and mechanical dimensions.

Parameter Comparison

Engineering Selection Recommendations

Phoenix Contact 1788686 is the preferred substitute for direct replacement within existing Phoenix Contact COMBICON MC designs. This part maintains identical electrical ratings (8A IEC, 250V IEC, 8A UL, 300V UL), pitch, position count, and orientation. The primary differences are housing material (Liquid Crystal Polymer instead of glass-filled polyamide) and mechanical dimensions (contact tail length and insulation height). The 1788686 offers improved moisture sensitivity (MSL 1 versus MSL 3), indicating superior performance in humid environments. Active product status ensures long-term availability and supply chain continuity.

Molex 0395021011 serves as a cross-manufacturer equivalent for applications where Phoenix Contact supply is constrained. This part meets all UL electrical requirements (8A, 300V) and maintains identical pitch, position count, and orientation. The Molex part specifies operating temperature range (-40°C to 105°C), which is not documented for the Phoenix Contact variants. Housing material differs (PA66 nylon 6/6), and mechanical dimensions vary slightly. ROHS3 compliance and MSL 1 rating provide regulatory and environmental advantages. Selection of the Molex substitute requires verification of mechanical fit within the PCB layout due to dimensional variations in contact tail length and insulation height.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1788686 be used as a direct drop-in replacement for the 1937583?

A: The 1788686 is electrically and functionally equivalent with identical pitch, position count, and electrical ratings. Mechanical dimensions differ slightly (contact tail length: 0.102" versus 0.134"; insulation height: 0.272" versus 0.285"). PCB layout verification is required to confirm physical compatibility, particularly solder pad spacing and clearance requirements.

Q: What are the key differences between the Phoenix Contact 1788686 and Molex 0395021011?

A: Both parts share identical electrical specifications (8A UL, 300V UL), pitch (4.6mm), position count (11), and orientation (90° right-angle). Differences include manufacturer, series designation, housing material composition, contact tail length (0.102" versus 0.140"), insulation height (0.272" versus 0.270"), and operating temperature specification (not specified versus -40°C to 105°C for Molex). The Molex part offers documented temperature range, which may be required for specific applications.

Q: Is the Molex 0395021011 suitable for applications requiring IEC electrical ratings?

A: The Molex 0395021011 does not specify IEC current or voltage ratings in the provided data. Only UL ratings are documented (8A, 300V). Applications requiring IEC compliance (8A, 250V) should prioritize Phoenix Contact substitutes (1937583 or 1788686), which explicitly specify both IEC and UL ratings.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: The original 1937583 carries MSL 3 (168-hour floor life), while both substitutes carry MSL 1 (unlimited floor life). MSL 1 indicates superior moisture resistance and eliminates the requirement for baking or controlled storage conditions prior to soldering. This represents an improvement for manufacturing and supply chain handling.

Q: Are there any compatibility concerns with PCB layout when switching between these three parts?

A: Yes. Contact tail length and insulation height vary across the three parts. The 1937583 has a contact tail of 0.134" and insulation height of 0.285"; the 1788686 has 0.102" and 0.272" respectively; the Molex part has 0.140" and 0.270". These dimensional differences may affect solder pad design, clearance to adjacent components, and mechanical stability. PCB layout review is mandatory before substitution.

Q: Which substitute should be selected for new designs?

A: For new designs, the Phoenix Contact 1788686 is recommended due to active product status, identical series compatibility, and superior MSL rating. The Molex 0395021011 is suitable as a secondary source option or when cross-manufacturer qualification is acceptable. Both parts meet all core electrical and regulatory requirements.