EM257524HC Terminal Block Header - Equivalent & Substitute Parts

Part Overview

The EM257524HC is a 24-position terminal block header manufactured by Eaton Electronics Division, part of the Euro-Mag EM2575 series. This component is a male pin, shrouded header with 0.200" (5.08mm) pitch spacing, designed for right-angle through-hole mounting and solder termination. The part is currently active in production with 888 units in stock.

Terminal block headers of this specification are essential in applications requiring reliable electrical interconnection between PCBs and external wiring. Equivalent and substitute parts become necessary when primary sourcing is unavailable, when managing multi-supplier strategies, or when addressing supply chain constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

EM257524HC

Eaton - Electronics DivisionIn Stock: 921EM257524HC Datasheet

Current PartRFQ

ELFH24210

Amphenol PCDIn Stock: 943ELFH24210 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EM257524HC is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 24
• Pitch: 0.200" (5.08mm)
• Header Orientation: 90° Right Angle
• Type: Header, Male Pins, Shrouded (4 Side)
• Termination Style: Solder
• Mounting Type: Through Hole
• Voltage - UL: 300 V
• Operating Temperature Range: -40°C ~ 105°C
• Contact Material: Brass
• Contact Mating Finish: Tin
• Material Flammability Rating: UL94 V-0

Allowable Variation Parameters:

• Current - UL: Substitute must meet or exceed 16 A (minimum requirement)
• Housing Material: May differ (thermoplastic vs. polybutylene terephthalate)
• Color: May differ
• Insulation Height: Minor dimensional variation acceptable within manufacturing tolerance
• RoHS Status: Both ROHS3 and RoHS Compliant are acceptable

The substitute part ELFH24210 (Amphenol PCD) meets all mandatory matching parameters and allowable variation criteria, qualifying it as a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: EM257524HC (Eaton Electronics Division)

The EM257524HC remains the primary specification for new designs and applications where Eaton sourcing is established. This part carries ROHS3 compliance and is actively produced with adequate inventory (888 units in stock).

Substitute Part: ELFH24210 (Amphenol PCD)

The ELFH24210 qualifies as an electrical and mechanical equivalent for the EM257524HC based on matching critical parameters across connector density, pitch, orientation, termination method, voltage rating, temperature range, and flammability compliance. Both parts are active products with current production status.

Critical Consideration - Current Rating:

The ELFH24210 carries a UL current rating of 15 A per contact, compared to 16 A for the EM257524HC. Applications operating at or near the 16 A maximum specification of the primary part should be evaluated to confirm that 15 A rating is acceptable for the intended use case. For applications operating below 15 A per contact, this difference is not a limiting factor.

Housing Material Difference:

The EM257524HC uses thermoplastic housing, while the ELFH24210 uses polybutylene terephthalate (PBT). Both materials meet UL94 V-0 flammability requirements. PBT offers enhanced chemical resistance and dimensional stability; thermoplastic provides standard performance. This difference does not affect electrical compatibility or mechanical fit.

Compliance Status:

Both parts satisfy RoHS requirements. The EM257524HC carries ROHS3 certification; the ELFH24210 carries RoHS compliance. Both are acceptable for applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can ELFH24210 be used as a direct replacement for EM257524HC in existing designs?

A: Yes, the ELFH24210 is mechanically and electrically compatible with the EM257524HC for applications where the 15 A current rating meets system requirements. Both parts share identical pitch (5.08mm), position count (24), orientation (90° right angle), termination method (solder), and mounting type (through hole). PCB footprints are compatible.

Q: What is the significance of the 1 A difference in current rating between these parts?

A: The EM257524HC is rated for 16 A per contact; the ELFH24210 is rated for 15 A per contact. This difference is relevant only for applications where individual contact current approaches or exceeds 15 A. For applications operating at 15 A or below per contact, this specification difference does not impact performance or reliability.

Q: Are the housing material differences between these parts significant?

A: Both housing materials (thermoplastic and polybutylene terephthalate) meet UL94 V-0 flammability standards. PBT offers superior chemical resistance and dimensional stability under thermal cycling. Thermoplastic provides standard performance. The choice between these materials depends on environmental exposure and mechanical stress requirements, not electrical compatibility.

Q: Do both parts meet RoHS requirements?

A: Yes. The EM257524HC carries ROHS3 compliance; the ELFH24210 carries RoHS compliance. Both satisfy RoHS directives and are acceptable for applications subject to hazardous substance restrictions.

Q: Are the insulation height differences between these parts a concern?

A: The EM257524HC has an insulation height of 0.327" (8.30mm); the ELFH24210 measures 0.319" (8.10mm). This 0.008" (0.20mm) difference falls within standard manufacturing tolerances and does not affect mechanical fit, mating with receptacles, or PCB clearance requirements.

Q: What is the inventory status for both parts?

A: The EM257524HC has 888 units in stock. The ELFH24210 has 858 units in stock. Both parts are actively produced and available for immediate procurement.

Q: Can these parts be mixed in the same assembly?

A: Yes. Both parts are mechanically and electrically compatible and can be used interchangeably within the same PCB assembly, provided that the 15 A current rating of the ELFH24210 is acceptable for all circuit branches.