Equivalent & Substitute Parts for Qualtek 853-03/003

Part Overview

The Qualtek 853-03/003 is a single-phase EMC/EMI line filter rated for 115V/250VAC at 3A with 50/60Hz operation. This chassis-mount filter features quick-connect termination and is designed for general-purpose applications requiring electromagnetic compatibility filtering. The part is currently active in production with 730 units in stock. Substitute parts may be required due to supply constraints, regional availability, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Substiute Parts

853-03/003

QualtekIn Stock: 794853-03/003 Datasheet

Current PartRFQ

3EK1

TE Connectivity Corcom FiltersIn Stock: 11093EK1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Qualtek 853-03/003 is determined by the following critical parameters:

• Filter Type & Configuration: Single-phase, single-stage topology
• Current Rating: 3 A minimum
• Voltage Rating: Must support 250VAC operation (the higher rated voltage of the main part)
• Frequency: 50/60Hz operation
• Mounting & Termination: Chassis mount with quick-connect interface
• Compliance: CSA, UR, VDE certifications required
• RoHS Status: ROHS3 compliance mandatory

The TE Connectivity Corcom Filters 3EK1 meets these core substitution criteria as a single-phase, single-stage line filter with 3A rating, 250VAC voltage support, 50/60Hz operation, chassis mounting, quick-connect termination, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity Corcom Filters 3EK1 is an approved substitute for the Qualtek 853-03/003 based on matching electrical specifications and compliance certifications. Both parts are ROHS3 compliant and carry CSA, UR, and VDE approvals, confirming suitability for equivalent applications.

The 3EK1 operates within a narrower temperature range (-10°C ~ 40°C) compared to the 853-03/003 (-25°C ~ 85°C). Applications requiring operation below -10°C or above 40°C must retain the original Qualtek part.

The inductance difference (1.76mH versus 3.2mH) reflects design variations between manufacturers. Both values are within acceptable ranges for single-stage EMC/EMI line filters at 3A, 250VAC operation. Circuit-level filtering performance may differ slightly; applications with specific attenuation requirements should verify performance characteristics against design specifications.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity Corcom 3EK1 replace the Qualtek 853-03/003 in all applications?

A: The 3EK1 is electrically and mechanically compatible for general-purpose applications operating within -10°C to 40°C. Applications requiring the extended temperature range of the original part (-25°C ~ 85°C) must use the Qualtek 853-03/003.

Q: What is the significance of the inductance difference between these parts?

A: Inductance affects filtering performance at specific frequency ranges. The 3EK1 (1.76mH) and 853-03/003 (3.2mH) have different attenuation characteristics. Both are designed for 3A, 250VAC single-stage filtering. Applications with specific EMI/EMC attenuation requirements should reference manufacturer filtering curves.

Q: Are both parts certified for the same regulatory standards?

A: Yes. Both the Qualtek 853-03/003 and TE Connectivity Corcom 3EK1 carry CSA, UR, and VDE approvals and are ROHS3 compliant, confirming equivalent regulatory acceptance.

Q: What is the voltage compatibility between these parts?

A: The Qualtek 853-03/003 is rated for 115V and 250VAC operation. The TE Connectivity Corcom 3EK1 is rated for 250VAC only. The 3EK1 is suitable for 250VAC applications. For 115VAC-only circuits, the original Qualtek part is required.

Q: How do the packaging formats differ?

A: The Qualtek 853-03/003 is supplied in standard packaging. The TE Connectivity Corcom 3EK1 is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.