Phoenix Contact 1705728 Terminal Block: Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1705728 is a 9-position wire-to-board terminal block with 0.150" (3.81mm) pitch, designed for horizontal board mounting using press-fit technology. This component belongs to the COMBICON EMKDS series and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Manufacturer	Phoenix Contact
Part Number	1705728
Category	Terminal Blocks
Series	COMBICON EMKDS
Positions	9
Pitch	0.150" (3.81mm)
Mating Orientation	Horizontal with Board
Current Rating	10 A
Voltage Rating	300 V
Wire Gauge	14-30 AWG
Mounting Type	Press Fit
Wire Termination	Screw - Rising Cage Clamp
Housing Material	Polyamide (PA), Nylon
Screw Thread	M2
Torque Specification	0.22-0.25 Nm (1.9-2.2 Lb-In)
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 1705728 is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Current rating (10 A), voltage rating (300 V), and wire gauge compatibility (14-30 AWG) must remain unchanged
Physical Configuration: 9 positions, 0.150" (3.81mm) pitch, and horizontal board mating orientation are non-negotiable
Termination Method: Screw-based rising cage clamp wire termination must be preserved
Material and Compliance: Polyamide housing, RoHS compliance, and MSL rating must be maintained

The primary distinction among equivalent parts lies in the mounting technology: press-fit versus through-hole PCB attachment. Both mounting methods provide equivalent electrical and mechanical performance within the specified parameter ranges, with the difference being the physical board interface mechanism.

Parameter Comparison

Parameter	1705728 (Main Part)	1705618 (Substitute)	Compatibility
Manufacturer	Phoenix Contact	Phoenix Contact	Identical
Positions	9	9	Identical
Pitch	0.150" (3.81mm)	0.150" (3.81mm)	Identical
Mating Orientation	Horizontal with Board	Horizontal with Board	Identical
Current Rating	10 A	10 A	Identical
Voltage Rating	300 V	300 V	Identical
Wire Gauge	14-30 AWG	14-30 AWG	Identical
Wire Termination	Screw - Rising Cage Clamp	Screw - Rising Cage Clamp	Identical
Housing Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Identical
Screw Thread	M2	M2	Identical
Torque Specification	0.22-0.25 Nm (1.9-2.2 Lb-In)	0.22-0.25 Nm (1.9-2.2 Lb-In)	Identical
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
Mounting Type	Press Fit	Through Hole	Different - Board Interface Only
Series	COMBICON EMKDS	COMBICON MKDSD	Different Series - Same Product Line
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The Phoenix Contact 1705618 is the direct functional equivalent for the obsolete 1705728. Selection between these parts is determined solely by PCB design requirements:

Use 1705618 (Through Hole) when the PCB design accommodates through-hole mounting technology. This part is currently in active production status with 1100 units in stock, ensuring long-term availability and supply chain stability.

Use 1705728 (Press Fit) only if existing PCB designs are committed to press-fit mounting and component availability permits. This part is obsolete and inventory is limited to 688 units.

Both parts maintain identical electrical performance, mechanical interface dimensions, and compliance certifications. The substitution is valid across all electrical and thermal operating conditions within the specified parameter ranges. No design modifications to wire termination, screw torque procedures, or electrical circuit integration are required when transitioning between these parts.

Frequently Asked Questions (FAQ)

Q: Can 1705618 be used as a direct replacement for 1705728 in existing designs?

A: Yes, provided the PCB design can accommodate through-hole mounting instead of press-fit. All electrical, mechanical, and compliance parameters are identical. Only the board interface method differs.

Q: What is the primary difference between these two parts?

A: The mounting technology. The 1705728 uses press-fit pins for direct insertion into plated PCB holes without solder. The 1705618 uses through-hole pins that require solder attachment. Both achieve equivalent electrical and mechanical performance.

Q: Are there any compatibility issues with wire gauge or termination torque?

A: No. Both parts accept 14-30 AWG wire and require identical screw torque of 0.22-0.25 Nm (1.9-2.2 Lb-In). Wire termination procedures are identical.

Q: Why is 1705728 listed as obsolete?

A: The part is no longer in active production. The 1705618 (through-hole variant) has replaced it in the active product line. Existing inventory of 1705728 remains available but is limited.

Q: Do these parts have different electrical ratings?

A: No. Both parts are rated for 10 A at 300 V with identical wire gauge compatibility and voltage/current handling characteristics.

Q: Are both parts RoHS compliant?

A: Yes. Both 1705728 and 1705618 are RoHS compliant with MSL rating 1 (unlimited moisture sensitivity level).

Q: Can I mix these parts in the same assembly?

A: Yes, if the PCB design includes both press-fit and through-hole mounting positions. However, this is not typical. Standard practice is to use one mounting method per design.

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