Phoenix Contact 1937648 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937648 is a 6-position vertical terminal block header with 4.6mm pitch, designed for solder termination in through-hole applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates at 8A per position (IEC) and 320V (IEC), with a shrouded 4-side design for enhanced safety and reliability in industrial control and power distribution circuits.

Key Parameters

Parameter	Value
Manufacturer Part Number	1937648
Manufacturer	Phoenix Contact
Category	Terminal Blocks
Series	COMBICON MCV
Number of Positions	6
Pitch	0.138" (4.60mm)
Header Orientation	Vertical
Type	Header, Male Pins, Shrouded (4 Side)
Termination Style	Solder
Mounting Type	Through Hole
Current - IEC	8A per Position
Voltage - IEC	320V
Current - UL	8A
Voltage - UL	300V
Material Flammability Rating	UL94 V-0
Housing Material	Polyamide (PA), Nylon, Glass Filled
Contact Mating Finish	Tin
Contact Tail Length	0.134" (3.40mm)
Insulation Height	0.362" (9.20mm)
Color	Black
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the Phoenix Contact 1937648 is determined by strict alignment of the following critical parameters:

Number of Positions: 6 (exact match required)
Pitch: 0.138" (4.60mm) (exact match required)
Header Orientation: Vertical (exact match required)
Type: Header, Male Pins, Shrouded (4 Side) (exact match required)
Termination Style: Solder (exact match required)
Mounting Type: Through Hole (exact match required)
Material Flammability Rating: UL94 V-0 (exact match required)
Current Rating - UL: 8A minimum (equal or greater acceptable)
Voltage Rating - UL: 300V minimum (equal or greater acceptable)

All substitute parts listed below meet these criteria. Variations in housing material composition, contact finish (tin vs. gold), color, and contact tail length represent acceptable engineering tolerances within the same functional category.

Parameter Comparison

Parameter	1937648 (Phoenix Contact)	0395011006 (Molex)	0395011506 (Molex)	0395016006 (Molex)	0395016506 (Molex)	OQ0612500000G (Amphenol Anytek)
Number of Positions	6	6	6	6	6	6
Pitch	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)	0.138" (4.60mm)
Header Orientation	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
Termination Style	Solder	Solder	Solder	Solder	Solder	Solder
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Current - UL	8A	8A	8A	8A	8A	10A
Voltage - UL	300V	300V	300V	300V	300V	300V
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Mating Finish	Tin	Tin	Gold	Tin	Gold	Tin
Housing Material	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Thermoplastic Resin
Contact Tail Length	0.134" (3.40mm)	0.140" (4.66mm)	0.140" (4.66mm)	0.140" (4.66mm)	0.140" (4.66mm)	0.138" (4.60mm)
Insulation Height	0.362" (9.20mm)	0.360" (9.14mm)	0.360" (9.14mm)	0.360" (9.14mm)	0.360" (9.14mm)	0.362" (9.20mm)
Operating Temperature	Not specified	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 115°C
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing support, addressing the obsolescence status of the Phoenix Contact 1937648. Selection among substitutes should be based on the following criteria:

Molex Eurostyle ESE 39501 series parts (0395011006, 0395011506, 0395016006, 0395016506) provide direct functional equivalence with established supply chain availability. These parts are ROHS3 compliant and offer operating temperature range of -40°C to 105°C. Contact finish selection between tin and gold depends on application requirements; gold-plated contacts (0395011506, 0395016506) provide enhanced corrosion resistance in high-humidity or harsh environments, while tin-plated contacts (0395011006, 0395016006) are suitable for standard industrial applications. Housing color (black vs. green) does not affect electrical performance.

The Amphenol Anytek OQ0612500000G offers the highest current rating at 10A per position and extended operating temperature range to 115°C, making it suitable for applications requiring enhanced thermal performance. This part maintains identical pitch, position count, and shrouded design specifications.

All substitute parts maintain UL94 V-0 flammability rating and meet or exceed the voltage and current specifications of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 10-position terminal block as a substitute for the 6-position Phoenix Contact 1937648?

A: No. The number of positions is a critical substitution parameter. The 10-position variant (Phoenix Contact 1843680) is not functionally equivalent and would require circuit redesign. Only 6-position headers are acceptable substitutes.

Q: What is the difference between tin and gold contact finishes?

A: Contact finish affects corrosion resistance and contact reliability. Tin-plated contacts (0395011006, 0395016006) are suitable for standard industrial environments. Gold-plated contacts (0395011506, 0395016506) provide superior corrosion resistance in high-humidity, salt-spray, or chemically aggressive environments. Both finishes meet the electrical requirements of the original part.

Q: Are there dimensional differences between substitute parts?

A: Minor variations exist in contact tail length (0.134" to 0.140") and insulation height (0.360" to 0.362"). These tolerances are within standard engineering practice for terminal block headers and do not affect PCB mounting or connector mating. Verify PCB footprint compatibility during design review.

Q: Which substitute part has the best thermal performance?

A: The Amphenol Anytek OQ0612500000G operates to 115°C, compared to 105°C for Molex parts. This extended range provides additional margin in high-temperature applications. However, all parts meet the electrical specifications of the original Phoenix Contact 1937648.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes are ROHS3 compliant, meeting current environmental regulations. The original Phoenix Contact 1937648 is RoHS compliant (earlier standard). Substitution does not introduce RoHS compliance risk.

Q: Can I mix substitute parts from different manufacturers in the same circuit?

A: Yes. All substitute parts meet identical electrical and mechanical specifications for pitch, position count, voltage, and current ratings. Mixed-manufacturer designs are acceptable from an engineering standpoint. However, standardizing on a single manufacturer part number per design is recommended for supply chain consistency and inventory management.

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