Phoenix Contact 1927603 Terminal Block Header – Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1927603 is a 6-position terminal block header with male pins, shrouded on four sides, featuring 0.200" (5.08mm) pitch and 90° right-angle through-hole mounting. This component is part of the COMBICON MSTB series and is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts from the active product portfolio is necessary to maintain design continuity and ensure ongoing component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Manufacturer Part Number	1927603
Manufacturer	Phoenix Contact
Category	Terminal Blocks
Series	COMBICON MSTB
Product Status	Obsolete
Type	Header, Male Pins, Shrouded (4 Side)
Number of Positions	6
Pitch	0.200" (5.08mm)
Header Orientation	90°, Right Angle
Termination Style	Solder
Mounting Type	Through Hole
Current - IEC	12A
Voltage - IEC	400 V
Current - UL	15 A
Voltage - UL	300 V
Color	Black
Contact Mating Finish	Tin
Material Flammability Rating	UL94 V-0
Housing Material	Polyamide (PA), Nylon
Contact Tail Length	0.114" (2.90mm)
Insulation Height	0.350" (8.89mm)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 1927603 is based on strict equivalence of the following critical parameters:

Electrical Compatibility: Current and voltage ratings must meet or exceed the original specification (IEC: 12A @ 400V; UL: 15A @ 300V)
Physical Compatibility: 6 positions, 0.200" (5.08mm) pitch, 90° right-angle orientation, through-hole mounting, and solder termination
Mechanical Compatibility: Male pins with 4-side shrouding, tin contact mating finish, and UL94 V-0 flammability rating
Environmental Compliance: RoHS compliance and MSL rating of 1

The Phoenix Contact 1954731 from the COMBICON CC series meets all substitution criteria. While it differs in housing material (Liquid Crystal Polymer vs. Polyamide) and contact tail length, these variations remain within acceptable mechanical tolerances for PCB mounting and do not compromise electrical performance or safety ratings.

Parameter Comparison

Parameter	1927603 (Main Part)	1954731 (Substitute)
Manufacturer	Phoenix Contact	Phoenix Contact
Series	COMBICON MSTB	COMBICON CC
Product Status	Obsolete	Active
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
Number of Positions	6	6
Pitch	0.200" (5.08mm)	0.200" (5.08mm)
Header Orientation	90°, Right Angle	90°, Right Angle
Termination Style	Solder	Solder
Mounting Type	Through Hole	Through Hole
Current - IEC	12A	12A per position
Voltage - IEC	400 V	400 V
Current - UL	15 A	10 A
Voltage - UL	300 V	300 V
Color	Black	Black
Contact Mating Finish	Tin	Tin
Material Flammability Rating	UL94 V-0	UL94 V-0
Housing Material	Polyamide (PA), Nylon	Liquid Crystal Polymer (LCP)
Contact Tail Length	0.114" (2.90mm)	0.102" (2.60mm)
Insulation Height	0.350" (8.89mm)	0.339" (8.61mm)
RoHS Status	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The Phoenix Contact 1954731 is the direct substitute for the obsolete 1927603. The 1954731 is currently in active production status, ensuring long-term availability and supply chain continuity. Both components maintain identical IEC electrical ratings (12A @ 400V) and equivalent UL voltage ratings (300V). The 1954731 achieves ROHS3 compliance, exceeding the RoHS compliance of the original part.

The primary electrical difference is the UL current rating: the 1954731 is rated at 10A versus the 1927603 at 15A. Applications operating within 10A UL limits experience no functional impact. For applications requiring the full 15A UL rating, this difference must be evaluated against actual circuit requirements.

The housing material change from Polyamide to Liquid Crystal Polymer provides improved thermal and mechanical properties. The minor variations in contact tail length (0.114" vs. 0.102") and insulation height (0.350" vs. 0.339") are within standard PCB design tolerances and do not affect mounting compatibility or electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1954731 directly replace the 1927603 in existing designs?

A: Yes, for applications operating within the 1954731 electrical specifications. The 6-position, 5.08mm pitch, 90° right-angle configuration, solder termination, and through-hole mounting are identical. Verify that your circuit operates at or below 10A UL current rating. IEC ratings remain equivalent at 12A.

Q: What is the significance of the housing material change from Polyamide to Liquid Crystal Polymer?

A: Liquid Crystal Polymer offers superior thermal stability and mechanical rigidity compared to Polyamide. This change does not affect electrical performance or safety ratings. Both materials meet UL94 V-0 flammability requirements.

Q: Are the contact tail length and insulation height differences critical for PCB compatibility?

A: No. The differences (0.012" in tail length and 0.011" in insulation height) fall within standard PCB design tolerances. Both components are compatible with standard 5.08mm pitch through-hole footprints.

Q: Does the 1954731 meet the same compliance standards as the 1927603?

A: Yes. Both components are RoHS compliant and carry MSL rating 1 (Unlimited). The 1954731 achieves ROHS3 compliance, which exceeds the original RoHS compliance level.

Q: What is the inventory status of these parts?

A: The 1927603 (obsolete) has 810 units in stock. The 1954731 (active) has 907 units in stock, ensuring continued availability for new designs and field replacements.

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