EM257518VC Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The EM257518VC is an 18-position terminal block header manufactured by Eaton - Electronics Division, part of the Euro-Mag EM2575 series. This component is a male pin, shrouded (4-side) vertical through-hole terminal block with 0.200" (5.08mm) pitch spacing, designed for solder termination applications. The part maintains Active product status with 814 units currently in stock. Terminal block headers of this configuration are essential in applications requiring reliable electrical connections with mechanical strain relief and organized wire management in industrial control systems, power distribution modules, and modular electronic assemblies. Equivalent substitute parts may be required due to supply chain constraints, regional availability, or design standardization across manufacturing facilities.

Substiute Parts

EM257518VC

Eaton - Electronics DivisionIn Stock: 841EM257518VC Datasheet

Current PartRFQ

1755891

Phoenix ContactIn Stock: 10181755891 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EM257518VC is determined by strict equivalence across the following critical parameters:

Position and Pitch Compatibility: The substitute part must have exactly 18 positions arranged in a single level with 0.200" (5.08mm) pitch spacing. This ensures mechanical and electrical compatibility with existing PCB layouts and mating connectors.

Orientation and Mounting: The substitute must maintain vertical orientation with through-hole mounting to ensure compatibility with standard PCB assembly processes and mechanical mounting requirements.

Electrical Ratings: The substitute must meet or exceed the UL voltage rating of 300 V and UL current rating of 16 A to ensure safe operation within the intended application envelope.

Termination and Contact Configuration: The substitute must feature solder termination with male pins in a shrouded (4-side) configuration to maintain electrical isolation and mechanical robustness.

Compliance Standards: The substitute must maintain UL94 V-0 flammability rating and ROHS3 compliance to satisfy regulatory and safety requirements.

The Phoenix Contact 1755891 satisfies all these critical parameters and qualifies as a direct substitute for the EM257518VC.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - EM257518VC (Eaton): The EM257518VC maintains Active product status with established supply availability (814 units in stock). This part is the original specification and should be selected when supply permits and no design constraints exist.

Substitute Selection - 1755891 (Phoenix Contact): The Phoenix Contact 1755891 qualifies as a direct functional substitute based on matching critical electrical and mechanical parameters. Both parts are Active products with ROHS3 compliance and UL94 V-0 flammability certification. The Phoenix Contact alternative provides higher IEC voltage rating (630 V versus unspecified for Eaton) and equivalent UL voltage rating (300 V). The contact tail length difference (0.154" versus 0.177") requires verification against specific PCB pad layout and solder joint requirements, but this dimensional variance is within typical manufacturing tolerances for through-hole terminal block applications.

Compliance Basis: Both parts satisfy identical regulatory requirements under ROHS3 and maintain equivalent ECCN and HTSUS classifications, confirming substitution viability from a compliance perspective.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1755891 be used as a direct replacement for the EM257518VC in existing designs?

A: Yes, the 1755891 qualifies as a direct substitute based on matching position count (18), pitch spacing (5.08mm), orientation (vertical), mounting type (through-hole), termination style (solder), and electrical ratings (300 V UL, 12 A UL minimum). The contact tail length difference (3.90mm versus 4.50mm) is a minor dimensional variance that typically does not affect PCB compatibility in standard through-hole applications, but should be confirmed against specific board layout requirements.

Q: What is the significance of the different current ratings between the two parts?

A: The EM257518VC carries a UL current rating of 16 A, while the Phoenix Contact 1755891 is rated at 12 A (UL) and 12 A (IEC). For applications operating at or above 12 A, the EM257518VC provides higher current capacity. For applications operating below 12 A, both parts are suitable. The application's actual current requirements must be evaluated against these ratings.

Q: Are there any housing material differences that affect performance?

A: The EM257518VC uses thermoplastic housing, while the Phoenix Contact 1755891 uses polyamide (PA) nylon. Both materials achieve UL94 V-0 flammability rating and are suitable for the specified operating temperature range (-40°C to 105°C for Eaton; operating temperature not specified for Phoenix Contact). Both materials provide equivalent electrical insulation and mechanical robustness for terminal block applications.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the EM257518VC and 1755891 are ROHS3 compliant, carry UL94 V-0 flammability certification, and share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications. This confirms equivalent regulatory standing for procurement and use.

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

A: Verification should focus on: (1) PCB pad layout compatibility with the 3.90mm contact tail length of the 1755891 versus the 4.50mm of the EM257518VC; (2) confirmation that the 12 A current rating meets application requirements; (3) mechanical fit within the assembly enclosure, as housing material differences may affect dimensional tolerances; (4) solder joint formation characteristics, as different housing materials may exhibit different thermal profiles during reflow.

Q: Is the Phoenix Contact part available in equivalent inventory quantities?

A: The Phoenix Contact 1755891 shows 935 units in stock, compared to 814 units for the EM257518VC, indicating adequate availability for both immediate and sustained production requirements.