ECQ-UBAF103KA Equivalent & Substitute Parts

Part Overview

The ECQ-UBAF103KA is a 10000 pF film capacitor manufactured by Panasonic Electronic Components, rated for 300V AC operation with polypropylene metallized dielectric. This component is designed for EMI and RFI suppression applications in through-hole configurations. The part carries a "Not For New Designs" product status, indicating that Panasonic has discontinued active development for this model. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Key Parameters

Parameter	Value
Capacitance	10000 pF (0.01 µF)
Tolerance	±10%
Voltage Rating - AC	300V
Dielectric Material	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C to 110°C
Mounting Type	Through Hole
Package / Case	Radial
Lead Spacing	0.591" (15.00 mm)
Physical Dimensions	0.728" L x 0.197" W (18.50 mm x 5.00 mm)
Height - Seated (Max)	0.394" (10.00 mm)
Termination	PC Pins
Applications	EMI, RFI Suppression
Ratings	X1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ECQ-UBAF103KA are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic requires exact matching of the following parameters:

Capacitance value: 10000 pF
Tolerance: ±10%
Voltage Rating - AC: 300V
Dielectric Material: Polypropylene (PP), Metallized
Operating Temperature Range: -40°C to 110°C
Mounting Type: Through Hole
Package / Case: Radial
Lead Spacing: 0.591" (15.00 mm)
Physical Dimensions: 0.728" L x 0.197" W
Height - Seated (Max): 0.394"
Termination: PC Pins
Ratings: X1
RoHS Compliance: ROHS3 Compliant

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Parameter	ECQ-UBAF103KA (Main Part)	ECQ-UBAF103K (Substitute)	Match Status
Manufacturer	Panasonic Electronic Components	Panasonic Electronic Components	Identical
Capacitance	10000 pF	10000 pF	Identical
Tolerance	±10%	±10%	Identical
Voltage Rating - AC	300V	300V	Identical
Dielectric Material	Polypropylene (PP), Metallized	Polypropylene (PP), Metallized	Identical
Operating Temperature Range	-40°C to 110°C	-40°C to 110°C	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Radial	Radial	Identical
Lead Spacing	0.591" (15.00 mm)	0.591" (15.00 mm)	Identical
Physical Dimensions	0.728" L x 0.197" W (18.50 mm x 5.00 mm)	0.728" L x 0.197" W (18.50 mm x 5.00 mm)	Identical
Height - Seated (Max)	0.394" (10.00 mm)	0.394" (10.00 mm)	Identical
Termination	PC Pins	PC Pins	Identical
Ratings	X1	X1	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Product Status	Not For New Designs	Not For New Designs	Identical

Engineering Selection Recommendations

The ECQ-UBAF103K serves as a direct parametric equivalent to the ECQ-UBAF103KA. Both parts are manufactured by Panasonic Electronic Components within the ECQUB series and share identical electrical specifications, mechanical dimensions, and compliance certifications.

Both the main part and substitute carry "Not For New Designs" status, indicating that neither part is recommended for new design implementations. For legacy system support and field replacements, the ECQ-UBAF103K is suitable for direct substitution in applications requiring 10000 pF capacitance at 300V AC with polypropylene metallized dielectric construction.

Both parts maintain ROHS3 compliance and are unaffected by REACH regulations. The identical lead spacing (0.591"), physical dimensions (0.728" L x 0.197" W), and radial through-hole mounting configuration ensure mechanical and electrical compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-UBAF103K replace the ECQ-UBAF103KA in existing designs?

A: Yes. The ECQ-UBAF103K is a parametric equivalent with identical capacitance (10000 pF), tolerance (±10%), voltage rating (300V AC), dielectric material (polypropylene metallized), operating temperature range (-40°C to 110°C), and physical dimensions. The lead spacing and radial through-hole mounting are identical, ensuring direct PCB compatibility.

Q: What is the difference between ECQ-UBAF103KA and ECQ-UBAF103K?

A: Both parts share the same base product number (ECQ-UBAF103) and are manufactured by Panasonic Electronic Components. The parts are parametrically identical across all electrical and mechanical specifications. The suffix variation reflects different packaging or inventory designations but does not affect functional performance or compatibility.

Q: Are both parts suitable for new designs?

A: No. Both the ECQ-UBAF103KA and ECQ-UBAF103K carry "Not For New Designs" product status. These parts are appropriate for legacy system maintenance, field replacements, and repair applications only.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching capacitance (10000 pF), tolerance (±10%), AC voltage rating (300V), dielectric material (polypropylene metallized), operating temperature range (-40°C to 110°C), mounting type (through hole), package type (radial), lead spacing (0.591"), physical dimensions (0.728" L x 0.197" W), and termination type (PC pins).

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8532.25.0020) classifications.

Q: What applications are these capacitors designed for?

A: Both parts are specified for EMI and RFI suppression applications with X1 ratings, indicating suitability for line-to-ground filtering in AC circuits.

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