Equivalent & Substitute Parts for Eaton A400303CW Terminal Block

Part Overview

The Eaton A400303CW is a 3-circuit barrier block connector from the Magnum® A4000 series, designed for chassis and panel mounting applications. This component features a 0.562" (14.27mm) pitch with screw termination and captive plate assembly, rated for 50A at 150V with wire gauge compatibility of 8-16 AWG.

The A400303CW is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system compatibility, ensure continued availability, and support ongoing maintenance and replacement requirements for installed equipment.

Substiute Parts

A400303CW

Eaton - Electronics DivisionIn Stock: 1072A400303CW Datasheet

Current PartRFQ

A400303

Eaton - Electronics DivisionIn Stock: 1162A400303 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A400303CW is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: 3 circuits with matching pitch of 0.562" (14.27mm)
• Electrical Ratings: 50A current capacity and 150V voltage rating
• Termination Method: Screw termination with captive plate assembly
• Barrier Configuration: 2 Wall (Dual) barrier type
• Temperature Performance: -40°C ~ 105°C operating range
• Insulation Material: Thermoplastic construction
• Safety Certification: UL94 V-0 flammability rating

The substitute part A400303 meets all these criteria and is therefore electrically and mechanically interchangeable with the A400303CW.

Parameter Comparison

Engineering Selection Recommendations

The A400303 serves as the direct active substitute for the obsolete A400303CW. Both components are manufactured by Eaton - Electronics Division within the Magnum® A4000 series and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status and regulatory compliance. The A400303CW is obsolete, while the A400303 maintains active production status. Additionally, the A400303 achieves ROHS3 compliance and REACH unaffected status, whereas the A400303CW is RoHS non-compliant.

For new designs, maintenance applications, or system replacements, the A400303 is the appropriate selection. The active production status ensures continued availability and supply chain reliability. The improved regulatory compliance of the A400303 aligns with current environmental and safety standards.

Frequently Asked Questions (FAQ)

Q: Can the A400303 directly replace the A400303CW in existing installations?

A: Yes. The A400303 is electrically and mechanically equivalent to the A400303CW. All critical parameters including circuit count, pitch, current rating, voltage rating, termination method, and operating temperature range are identical. Direct substitution is supported.

Q: What is the difference between A400303CW and A400303?

A: The primary differences are product status and regulatory compliance. The A400303CW is obsolete, while the A400303 is in active production. The A400303 is ROHS3 compliant and REACH unaffected, whereas the A400303CW is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Why is the A400303CW classified as obsolete?

A: The A400303CW has been superseded by the A400303, which maintains the same functional specifications while offering improved regulatory compliance and active manufacturing support.

Q: Are there packaging differences between these parts?

A: The A400303CW is supplied in standard packaging, while the A400303 is supplied in bulk packaging. This distinction does not affect component functionality or interchangeability.

Q: What certifications apply to both parts?

A: Both the A400303CW and A400303 carry UL94 V-0 flammability rating and are classified under ECCN EAR99 and HTSUS 8536.90.4000. The A400303 additionally holds ROHS3 compliance and REACH unaffected status.

Q: Can I use the A400303 in applications previously designed for the A400303CW?

A: Yes. The A400303 maintains full compatibility with all applications designed for the A400303CW. No circuit modifications or design changes are required.