Phoenix Contact 5451679 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 5451679 is an 8-position terminal block plug with female sockets, 0.200" (5.08mm) pitch, and 270° free-hanging in-line mounting. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new designs requiring compatible connectivity solutions.

The 5451679 operates at 12A (IEC) / 12A (UL) and 630V (IEC) / 300V (UL), supporting wire gauges from 12-30 AWG (0.2-2.5mm²). Its screw termination design and UL94 V-0 flammability rating make it suitable for industrial control and power distribution applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	5451679
Manufacturer	Phoenix Contact
Category	Terminal Blocks
Description	TERM BLOCK PLUG 8POS 5.08MM
Type	Plug, Female Sockets
Number of Positions	8
Pitch	0.200" (5.08mm)
Plug Wire Entry	270°
Termination Style	Screw
Mounting Type	Free Hanging (In-Line)
Current - IEC	12A
Voltage - IEC	630V
Current - UL	12A
Voltage - UL	300V
Wire Gauge - AWG	12-30 AWG
Wire Gauge - mm²	0.2-2.5mm²
Color	Green
Contact Mating Finish	Tin
Material Flammability Rating	UL94 V-0
Housing Material	Polyamide (PA), Nylon
Insulation Height	1.024" (26.01mm)
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 5451679 is determined by strict equivalence across the following critical parameters:

Position and Pitch Compatibility: The substitute must maintain 8 positions at 0.200" (5.08mm) pitch to ensure mechanical and electrical compatibility with existing mating connectors and PCB layouts.

Electrical Ratings: The substitute must support minimum current and voltage ratings equal to or exceeding the original: 12A (IEC) and 630V (IEC). UL ratings of 12A and 300V establish the baseline for North American applications.

Termination and Mounting: The substitute must employ screw-based termination and free-hanging in-line mounting to maintain installation compatibility.

Wire Gauge Compatibility: Support for 12-30 AWG (0.2-2.5mm²) wire gauges ensures the substitute accepts the same conductor sizes as the original.

Material and Safety Compliance: UL94 V-0 flammability rating and polyamide housing material are required for equivalent safety performance. RoHS compliance status must be maintained or upgraded.

Connector Type: Female socket configuration is mandatory for mating with standard male pin headers.

The Phoenix Contact 1834961 meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Parameter	5451679 (Original)	1834961 (Substitute)
Manufacturer	Phoenix Contact	Phoenix Contact
Type	Plug, Female Sockets	Plug, Female Sockets
Number of Positions	8	8
Pitch	0.200" (5.08mm)	0.200" (5.08mm)
Plug Wire Entry	270°	270°
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)
Current - IEC	12A	12A
Voltage - IEC	630V	630V
Current - UL	12A	15A
Voltage - UL	300V	300V
Wire Gauge - AWG	12-30 AWG	12-30 AWG
Wire Gauge - mm²	0.2-2.5mm²	0.2-2.5mm²
Color	Green	Green
Contact Mating Finish	Tin	Tin
Material Flammability Rating	UL94 V-0	UL94 V-0
Housing Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Insulation Height	1.024" (26.01mm)	1.024" (26.01mm)
RoHS Status	RoHS Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The Phoenix Contact 1834961 is the qualified substitute for the obsolete 5451679. Both components share identical mechanical and electrical specifications across all critical parameters: 8-position configuration, 5.08mm pitch, 270° wire entry, free-hanging mounting, and equivalent current/voltage ratings for IEC applications.

The 1834961 offers enhanced UL current rating (15A versus 12A) and upgraded RoHS3 compliance status, providing improved regulatory alignment for new designs while maintaining full backward compatibility with existing installations.

The transition from the obsolete 5451679 to the active 1834961 eliminates supply chain risk and ensures long-term component availability. Both components employ identical housing materials (polyamide/nylon), flammability ratings (UL94 V-0), and wire gauge compatibility (12-30 AWG / 0.2-2.5mm²).

Frequently Asked Questions (FAQ)

Q: Can the 1834961 directly replace the 5451679 in existing installations?

A: Yes. Both components maintain identical mechanical pitch (5.08mm), position count (8), wire entry angle (270°), and mounting configuration (free-hanging in-line). Electrical ratings are equivalent for IEC applications (12A, 630V). The 1834961 is fully backward compatible.

Q: What is the difference in termination style between these parts?

A: The 5451679 uses standard screw termination. The 1834961 employs screw-based rising cage clamp termination, which provides improved wire retention and contact reliability while maintaining the same screw interface.

Q: Are there packaging differences between these parts?

A: The 5451679 is supplied in standard packaging. The 1834961 is available in bulk packaging, which may affect procurement quantities and lead times.

Q: Does the higher UL current rating of the 1834961 (15A vs. 12A) affect compatibility?

A: No. Higher current ratings indicate improved capability and do not affect compatibility. The 1834961 remains fully compatible with systems designed for the 5451679's 12A rating.

Q: Are both parts RoHS compliant?

A: Yes. The 5451679 is RoHS Compliant. The 1834961 is ROHS3 Compliant, representing an upgraded compliance status suitable for current regulatory requirements.

Q: What wire gauges are supported by the substitute?

A: Both the 5451679 and 1834961 support identical wire gauge ranges: 12-30 AWG or 0.2-2.5mm².

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