Phoenix Contact 1937240 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937240 is a 3-position terminal block header with male pins, shrouded design, and 90° right-angle orientation. This component features 0.200" (5.08mm) pitch spacing and through-hole solder termination, rated for 12A (IEC) and 15A (UL) current capacity. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	1937240
Manufacturer	Phoenix Contact
Category	Terminal Blocks
Series	COMBICON MSTBA
Number of Positions	3
Pitch	0.200" (5.08mm)
Header Orientation	90°, Right Angle
Type	Header, Male Pins, Shrouded (4 Side)
Termination Style	Solder
Mounting Type	Through Hole
Current - IEC	12A
Voltage - IEC	400 V
Current - UL	15 A
Voltage - UL	300 V
Housing Material	Polyamide (PA), Nylon
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937240 is determined by the following critical parameters:

Electrical Compatibility: Matching pitch (0.200"/5.08mm), number of positions (3), and voltage/current ratings within acceptable ranges
Mechanical Compatibility: Identical header orientation (90° right angle), male pin configuration, shrouded design, and through-hole mounting
Termination Method: Solder termination requirement
Regulatory Compliance: RoHS compliance and material flammability rating (UL94 V-0)

The Phoenix Contact 1955044 qualifies as a substitute based on these parameters. Both parts share identical pitch spacing, position count, orientation, and mounting method. Electrical ratings remain within compatible ranges for both IEC and UL standards. Both components maintain RoHS compliance and UL94 V-0 flammability certification.

Parameter Comparison

Parameter	1937240 (Main Part)	1955044 (Substitute)
Manufacturer	Phoenix Contact	Phoenix Contact
Number of Positions	3	3
Pitch	0.200" (5.08mm)	0.200" (5.08mm)
Header Orientation	90°, Right Angle	90°, Right Angle
Type	Header, Male Pins, Shrouded (4 Side)	Header, Male Pins, Shrouded (4 Side)
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
RoHS Status	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
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)

Engineering Selection Recommendations

The Phoenix Contact 1955044 is the designated substitute for the obsolete 1937240 model. Selection of the 1955044 is supported by the following factors:

Product Status: The 1955044 maintains active product status, ensuring continued availability and manufacturer support, whereas the 1937240 is obsolete.

Regulatory Compliance: Both components hold RoHS compliance certification and UL94 V-0 flammability rating, meeting equivalent safety and environmental standards.

Electrical Ratings: The 1955044 maintains IEC current and voltage ratings identical to the main part (12A, 400V). The UL current rating is 10A compared to 15A on the 1937240; this represents a reduction in UL capacity and must be evaluated against specific application requirements.

Mechanical Compatibility: Pitch spacing, position count, orientation, and mounting method are identical between both parts, ensuring direct mechanical interchangeability in PCB layouts and connector assemblies.

Material Difference: The 1955044 uses Liquid Crystal Polymer (LCP) housing versus Polyamide (PA) Nylon on the 1937240. Both materials meet UL94 V-0 requirements. Minor dimensional variations exist in contact tail length (0.102" vs 0.114") and insulation height (0.339" vs 0.350"), which remain within acceptable tolerance ranges for standard through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1955044 directly replace the 1937240 in existing designs?

A: Yes, for applications operating within the 1955044 electrical specifications. The 10A UL current rating of the 1955044 is lower than the 1937240's 15A rating. Verify that your application current requirements do not exceed 10A under UL standards. IEC ratings remain equivalent at 12A.

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

A: Both materials meet UL94 V-0 flammability certification. Liquid Crystal Polymer offers improved dimensional stability and chemical resistance compared to Polyamide. This change does not affect electrical performance or safety compliance for standard terminal block applications.

Q: Are the dimensional differences between contact tail length and insulation height critical for PCB layout?

A: The differences are minor (0.012" tail length reduction, 0.011" insulation height reduction). These variations fall within standard PCB design tolerances for through-hole components. Verify clearances in your specific PCB layout if space constraints exist.

Q: What packaging format is available for the 1955044?

A: The 1955044 is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The 1937240 was supplied without specified packaging format.

Q: Are both parts RoHS compliant?

A: Yes, both the 1937240 and 1955044 are RoHS compliant with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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