Curtis Industries 03ER33 Line Filter - Equivalent & Substitute Parts

Part Overview

The Curtis Industries 03ER33 is a single-phase EMC/EMI line filter rated for 250VAC at 3A with 50/60Hz operation and chassis mount configuration using wire leads. This component is classified as obsolete, making identification of suitable substitute parts essential for system maintenance and component replacement in applications requiring equivalent filtering performance.

Substiute Parts

03ER33

Curtis IndustriesIn Stock: 101203ER33 Datasheet

Current PartRFQ

F1399BB03

Curtis IndustriesIn Stock: 868F1399BB03 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 03ER33 is determined by strict equivalence across the following critical parameters:

• Single-phase filter topology
• Two-stage configuration
• 250VAC rated voltage
• 3A current rating
• 50/60Hz frequency compatibility
• Chassis mount form factor
• Wire lead termination
• General purpose application suitability

The Curtis Industries F1399BB03 meets all these criteria and is therefore classified as a direct substitute. This part maintains functional and electrical equivalence while offering improved product status (active vs. obsolete) and enhanced regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The F1399BB03 is the direct substitute for the obsolete 03ER33. Both parts share identical electrical and mechanical specifications across all critical parameters. The F1399BB03 offers additional advantages: active product status ensures ongoing availability and manufacturer support, expanded regulatory certifications (CE and TUV added to existing CSA and UR approvals), and ROHS3 compliance for applications requiring environmental compliance standards.

Selection of the F1399BB03 is appropriate for direct replacement in existing designs without circuit modification or re-qualification, provided the application does not specifically require the legacy RoHS non-compliant status of the original part.

Frequently Asked Questions (FAQ)

Q: Can the F1399BB03 directly replace the 03ER33 without design changes?

A: Yes. The F1399BB03 maintains identical electrical ratings (250VAC, 3A, 50/60Hz), filter configuration (single-phase, two-stage), and mechanical form factor (chassis mount, wire leads). Direct substitution is supported.

Q: What is the difference in regulatory compliance between these parts?

A: The 03ER33 carries CSA, UR, and VDE approvals with RoHS non-compliant status. The F1399BB03 includes CE and TUV certifications in addition to CSA and UR, and meets ROHS3 compliance requirements. Applications requiring environmental or regional compliance standards should use the F1399BB03.

Q: Why is the 03ER33 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The F1399BB03 is the active replacement part from Curtis Industries and is currently in production.

Q: Are there packaging differences between these parts?

A: The 03ER33 packaging is unspecified in available documentation. The F1399BB03 is supplied in box packaging. Verify packaging requirements for your application before ordering.

Q: What is the current inventory status?

A: The 03ER33 has 995 pieces in stock as new original inventory. The F1399BB03 has 802 pieces in stock as new original inventory. Both are available for immediate procurement.