ELFH18250 Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The ELFH18250 is an 18-position terminal block header manufactured by Amphenol PCD, designed for vertical through-hole mounting with 5.08mm pitch spacing. This shrouded male pin header operates at 300V UL and 15A UL current rating, suitable for industrial control and signal distribution applications. The component is actively produced and RoHS compliant, making it suitable for modern electronic assemblies. Substitute parts may be required due to inventory constraints, regional availability, or specific application requirements where alternative electrical or mechanical parameters are acceptable.

Substiute Parts

ELFH18250

Amphenol PCDIn Stock: 1134ELFH18250 Datasheet

Current PartRFQ

1755668

Phoenix ContactIn Stock: 10411755668 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELFH18250 is based on the following critical parameters that must remain compatible:

• Position Count: 18 positions maintained across all substitutes
• Pitch Tolerance: 5.08mm (0.200") primary specification; 5.00mm (0.197") pitch represents a 0.08mm variance, acceptable within standard PCB layout tolerances for terminal block headers
• Header Type: Male pins with 4-side shrouding required for mechanical and electrical safety
• Orientation: Vertical through-hole mounting maintained
• Termination: Solder termination for PCB assembly compatibility
• Voltage Rating: Minimum 300V UL required; substitute meets this specification
• Current Rating: Minimum 12A acceptable where 15A primary specification is not mandatory; Phoenix Contact 1755668 provides 12A UL rating
• Compliance: RoHS compliance required; substitute meets RoHS3 compliance

The Phoenix Contact 1755668 qualifies as a functional substitute based on these parameters. The 0.08mm pitch variance is within acceptable PCB layout tolerances for standard terminal block applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: ELFH18250 (Amphenol PCD) is the specified component and should be used when available. Active product status and full parameter documentation support direct application without design modification.

Substitute Selection: Phoenix Contact 1755668 is acceptable as a functional equivalent under the following conditions:

• PCB layout accommodates the 0.08mm pitch variance (5.00mm vs. 5.08mm). Standard PCB design tolerances typically allow this variance without requiring layout revision.
• Application current requirement does not exceed 12A UL rating. If the circuit requires the full 15A capacity of the primary part, substitution is not appropriate.
• Housing material change from PBT to polyamide (PA/nylon) is acceptable for the application environment. Both materials meet UL94 V-0 flammability requirements.
• Increased insulation height (12.00mm vs. 8.10mm) does not create mechanical interference with adjacent components or enclosure constraints.

Both components maintain RoHS compliance and tin contact mating finish, ensuring solder joint reliability and environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1755668 be used as a direct drop-in replacement for the ELFH18250?

A: The 0.08mm pitch difference (5.00mm vs. 5.08mm) requires PCB layout verification. If the PCB was designed for 5.08mm spacing, the 5.00mm pitch component will fit within standard manufacturing tolerances but should be confirmed against your specific PCB design. The increased insulation height (12.00mm vs. 8.10mm) must also be checked for mechanical clearance.

Q: What is the impact of the reduced current rating (12A vs. 15A) on substitution?

A: The Phoenix Contact 1755668 is rated for 12A UL current. If your application requires continuous current above 12A, this substitute is not suitable. For applications operating at or below 12A, the substitute meets the electrical requirement.

Q: Are there material compatibility concerns with the housing material change?

A: The primary part uses PBT (Polybutylene Terephthalate) while the substitute uses polyamide (PA/nylon). Both materials meet UL94 V-0 flammability classification. Material selection should be verified against your specific environmental conditions, including temperature extremes, chemical exposure, and humidity requirements.

Q: Does the pitch variance affect solder joint reliability?

A: The 0.08mm pitch variance is within standard PCB manufacturing tolerances. Solder joint reliability is not compromised by this variance if the PCB was designed with appropriate pad spacing tolerances. Verify your PCB design specifications.

Q: Are both components RoHS compliant?

A: Yes. The ELFH18250 is RoHS Compliant, and the Phoenix Contact 1755668 is ROHS3 Compliant. Both meet current RoHS requirements for new designs.

Q: What should be verified before implementing the substitute in production?

A: Verify PCB layout compatibility with the 5.00mm pitch, confirm current requirements do not exceed 12A, check mechanical clearance for the increased insulation height, and validate that the polyamide housing material is suitable for your application environment.