Phoenix Contact 1966431 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1966431 is a 4-position terminal block plug with female sockets, 0.400" (10.16mm) pitch, designed for 180° free-hanging in-line applications. This component features screw-type rising cage clamp termination and is rated for 41A (IEC) / 50A (UL) operation at 1 kV (IEC) / 600V (UL). The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

1966431

Phoenix ContactIn Stock: 11991966431 Datasheet

Current PartRFQ

1970359

Phoenix ContactIn Stock: 7541970359 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the Phoenix Contact 1966431 is determined by the following critical parameters that must remain consistent:

Fixed Parameters (Must Match Exactly):

• Number of positions: 4
• Pitch: 0.400" (10.16mm)
• Type: Plug with female sockets
• Plug wire entry orientation: 180°
• Mounting type: Free hanging (in-line)
• Termination style: Screw - rising cage clamp
• Housing material: Polyamide (PA), Nylon
• Contact mating finish: Silver
• Screw size: M4
• Flammability rating: UL94 V-0

Allowable Parameter Variations:

• Current ratings may increase (IEC and UL)
• Voltage ratings may remain equal or increase
• Wire gauge range may expand to accommodate larger or smaller conductors
• Torque specifications may vary with improved designs
• Product status may transition from obsolete to active
• Compliance certifications may be updated (RoHS to ROHS3, REACH status)

The Phoenix Contact 1966431 has one identified substitute: 1970359.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 1970359 is a direct functional substitute for the 1966431. Both components share identical mechanical and electrical interface specifications, including pitch, position count, wire entry orientation, and termination method.

The 1970359 offers enhanced electrical performance with increased current ratings (76A IEC vs. 41A IEC; 55A UL vs. 50A IEC) and expanded wire gauge compatibility (6-20 AWG vs. 8-20 AWG; 0.75-16mm² vs. 0.5-10mm²). These improvements represent design evolution within the COMBICON PC series and do not introduce incompatibility.

The 1970359 maintains active product status with current compliance certifications (ROHS3 Compliant, REACH Unaffected), whereas the 1966431 is obsolete. For new designs and ongoing procurement, the 1970359 is the appropriate selection. For legacy system maintenance requiring exact electrical performance matching, the 1966431 specifications must be verified against actual circuit requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1970359 be used as a direct replacement for the 1966431 in existing applications?

A: Yes. The 1970359 maintains identical mechanical and electrical interface specifications. The increased current ratings and expanded wire gauge range of the 1970359 are compatible with applications designed for the 1966431. Verify that your application does not depend on the specific current or voltage limitations of the original part.

Q: What are the key differences between these two parts?

A: The primary differences are current ratings (1970359 rated higher), wire gauge range (1970359 accommodates larger conductors), product status (1970359 is active), and compliance certifications (1970359 is ROHS3 compliant). All mechanical and electrical interface parameters remain identical.

Q: Why is the 1966431 listed as obsolete?

A: The 1966431 has been superseded by the 1970359 within the Phoenix Contact product line. The 1970359 provides equivalent functionality with enhanced electrical performance and current compliance certifications.

Q: Are there any packaging differences between these parts?

A: The 1966431 packaging is listed as unspecified. The 1970359 is supplied in bulk packaging. Verify packaging requirements for your procurement process.

Q: What is the wire gauge compatibility range for each part?

A: The 1966431 accepts 8-20 AWG (0.5-10mm²). The 1970359 accepts 6-20 AWG (0.75-16mm²), providing compatibility with larger gauge conductors down to 6 AWG.

Q: Do these parts require different torque specifications during installation?

A: Yes. The 1966431 requires 1.2-1.5 Nm (10.6-13.3 Lb-In) screw torque. The 1970359 requires 1.7-1.8 Nm (15-15.9 Lb-In). Apply the appropriate torque specification for the part being installed.