ECQ-UBAF333KA Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECQ-UBAF333KA is a 0.033 µF film capacitor manufactured by Panasonic Electronic Components, designed for EMI and RFI suppression applications. This radial polypropylene metallized film capacitor operates at 300V AC with a ±10% tolerance and is rated for X1 applications. The part is currently in active production status with 820 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, ensuring direct functional replacement without circuit redesign.

Substiute Parts

ECQ-UBAF333KA

Panasonic Electronic ComponentsIn Stock: 856ECQ-UBAF333KA Datasheet

Current PartRFQ

ECQ-UBAF333K

Panasonic Electronic ComponentsIn Stock: 1103ECQ-UBAF333K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECQ-UBAF333KA are identified based on strict parametric equivalence within the Panasonic ECQUB series. The substitution logic is based on the following critical parameters that must remain identical:

• Capacitance Value: 0.033 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating (AC): 300V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C ~ 110°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Radial (exact match required)
• Lead Spacing: 0.591" (15.00mm) (exact match required)
• Physical Dimensions: 0.728" L x 0.236" W (18.50mm x 6.00mm) (exact match required)
• Termination: PC Pins (exact match required)
• Application Category: EMI, RFI Suppression (exact match required)
• Ratings Classification: X1 (exact match required)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Variations in packaging quantity or inventory levels do not affect substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ECQ-UBAF333KA and ECQ-UBAF333K are active production parts manufactured by Panasonic Electronic Components within the ECQUB series. Selection between these parts is based on the following engineering criteria:

Compliance and Certification: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Both are classified under HTSUS code 8532.25.0020. These certifications are maintained across both part numbers, ensuring regulatory compliance in all applications.

Electrical and Mechanical Equivalence: The ECQ-UBAF333K provides complete parametric equivalence to the ECQ-UBAF333KA across all electrical specifications (0.033 µF capacitance, ±10% tolerance, 300V AC rating) and mechanical characteristics (radial through-hole configuration, 15.00mm lead spacing, identical physical dimensions).

Availability Consideration: The ECQ-UBAF333K maintains higher inventory availability (1070 units) compared to the ECQ-UBAF333KA (820 units), both classified as new original stock. This difference in inventory levels does not affect functional equivalence or substitution eligibility.

Application Suitability: Both parts are rated for X1 classification and designated for EMI and RFI suppression applications. The identical operating temperature range (-40°C ~ 110°C) and polypropylene metallized dielectric ensure equivalent performance in target applications.

Frequently Asked Questions (FAQ)

Q: Can ECQ-UBAF333K be used as a direct replacement for ECQ-UBAF333KA?

A: Yes. The ECQ-UBAF333K is a parametric equivalent substitute. All electrical parameters (capacitance, tolerance, voltage rating, dielectric material), mechanical specifications (dimensions, lead spacing, mounting type), and compliance certifications are identical. Direct substitution is supported without circuit modification.

Q: Are there differences in the physical package between these two parts?

A: No. Both parts share identical radial through-hole package specifications. Physical dimensions are 0.728" L x 0.236" W (18.50mm x 6.00mm), with maximum seated height of 0.433" (11.00mm). Lead spacing is 0.591" (15.00mm) for both parts. PCB layout and mounting requirements are identical.

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

A: Yes. Both ECQ-UBAF333KA and ECQ-UBAF333K maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. HTSUS classification is identical (8532.25.0020). Regulatory requirements are satisfied by either part number.

Q: What is the difference between these part numbers?

A: The part numbers differ only in their suffix designation (KA versus K). This distinction does not reflect electrical or mechanical differences. Both parts are manufactured by Panasonic Electronic Components within the ECQUB series and maintain active production status.

Q: Are the operating temperature ranges identical?

A: Yes. Both parts operate across the identical temperature range of -40°C to 110°C. Thermal performance and derating characteristics are equivalent.

Q: Can these parts be used interchangeably in EMI and RFI suppression circuits?

A: Yes. Both parts are rated for X1 classification and designated for EMI and RFI suppression applications. Electrical performance in these applications is equivalent due to identical capacitance, tolerance, voltage rating, and dielectric material specifications.

Q: Is there a preferred part number for new designs?

A: Selection between ECQ-UBAF333KA and ECQ-UBAF333K is based on availability and supply chain requirements. Both parts are active production items with equivalent specifications. Inventory levels may influence procurement decisions, with ECQ-UBAF333K currently showing higher stock availability.