Phoenix Contact 1937253 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The Phoenix Contact 1937253 is a 4-position terminal block header with male pins, shrouded design, and 90° right-angle orientation. This component features 0.200" (5.08mm) pitch spacing and solder termination for through-hole mounting. 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.

Substiute Parts

1937253

Phoenix ContactIn Stock: 10641937253 Datasheet

Current PartRFQ

1955057

Phoenix ContactIn Stock: 7831955057 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Phoenix Contact 1937253 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of positions: 4
• Pitch spacing: 0.200" (5.08mm)
• Header orientation: 90°, Right Angle
• Type: Header, Male Pins, Shrouded (4 Side)
• Termination style: Solder
• Mounting type: Through Hole
• Contact mating finish: Tin
• Material flammability rating: UL94 V-0
• RoHS compliance: Required

Allowable Variations:

• Housing material composition (Polyamide vs. Liquid Crystal Polymer)
• Contact tail length (within mechanical fit constraints)
• Insulation height (within mechanical fit constraints)
• Current ratings (IEC and UL specifications may differ)
• Moisture sensitivity level
• Series designation
• Product status (Active substitutes acceptable for Obsolete parts)
• Packaging format

The substitute part Phoenix Contact 1955057 meets all mandatory matching parameters while offering an active product status and improved moisture sensitivity characteristics.

Parameter Comparison

Engineering Selection Recommendations

The Phoenix Contact 1955057 is a qualified substitute for the obsolete 1937253 based on the following engineering criteria:

Compliance and Certification Alignment: Both parts maintain UL94 V-0 material flammability rating and RoHS compliance, ensuring regulatory requirements are met in applications requiring these certifications.

Electrical Performance: IEC current rating of 12A per position is maintained. The UL current rating decreases from 15A to 10A on the substitute part. Applications operating at or below 10A UL specification are fully compatible. Applications requiring 15A UL current capacity must evaluate the substitute against specific circuit requirements.

Product Status Advantage: The 1955057 carries Active product status, ensuring long-term availability and continued manufacturing support, whereas the 1937253 is Obsolete. For new designs or ongoing production, the 1955057 provides supply chain stability.

Mechanical Considerations: Contact tail length and insulation height differ slightly between parts. The 1955057 features a shorter contact tail (0.102" vs. 0.114") and reduced insulation height (0.339" vs. 0.350"). These dimensional variations are within typical PCB design tolerances for through-hole terminal block applications but must be verified against specific board layout constraints.

Material Composition: The substitute uses Liquid Crystal Polymer (LCP) housing versus Polyamide (PA) Nylon in the original part. LCP provides superior moisture resistance, reflected in the improved MSL rating (1 vs. 3), making the substitute suitable for high-humidity or moisture-sensitive environments.

Frequently Asked Questions (FAQ)

Q: Can the 1955057 be used as a direct replacement for the 1937253 in existing designs?

A: The 1955057 is mechanically and electrically compatible for applications operating within 10A UL specification. Verify that your circuit does not exceed this current limit. Confirm PCB layout accommodates the slightly shorter contact tail length (0.102" vs. 0.114") and reduced insulation height (0.339" vs. 0.350").

Q: What is the difference in housing material, and does it affect performance?

A: The 1937253 uses Polyamide (PA) Nylon, while the 1955057 uses Liquid Crystal Polymer (LCP). LCP provides better moisture resistance and thermal stability. For standard industrial applications, both materials are suitable. For high-humidity or moisture-critical environments, the LCP housing of the 1955057 offers improved performance.

Q: Why does the UL current rating differ between these parts?

A: The 1937253 supports 15A UL current, while the 1955057 supports 10A UL current. This difference reflects different design specifications within the Phoenix Contact product line. Select based on your application's actual current requirements. If your circuit requires 15A UL capacity, the 1937253 specification must be maintained.

Q: What does the MSL rating difference mean for component handling?

A: The 1937253 has MSL 3 (168 hours), requiring controlled storage and handling. The 1955057 has MSL 1 (Unlimited), meaning it has no moisture sensitivity restrictions. The 1955057 is easier to handle and store without special environmental controls.

Q: Are there packaging differences between these parts?

A: The 1937253 packaging is not specified in the data. The 1955057 is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Confirm packaging compatibility with your procurement and assembly requirements.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both parts are RoHS Compliant and carry UL94 V-0 material flammability rating, meeting standard industrial and consumer electronics regulatory requirements.