ECJ-2YF1E334Z Equivalent & Substitute Parts

Part Overview

The ECJ-2YF1E334Z is a 0.33 µF ceramic capacitor rated at 25V with Y5V temperature coefficient in 0805 (2012 Metric) surface mount package, manufactured by Panasonic Electronic Components. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Direct replacements and upgraded alternatives are available from multiple manufacturers with identical or enhanced electrical specifications.

Key Parameters

Parameter	Value
Capacitance	0.33 µF
Tolerance	-20%, +80%
Voltage Rating	25V
Temperature Coefficient	Y5V (F)
Operating Temperature Range	-30°C ~ 85°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for ECJ-2YF1E334Z is determined by strict equivalence across the following parameters: capacitance value (0.33 µF), tolerance band (-20%, +80%), temperature coefficient (Y5V), package format (0805), and mounting type (Surface Mount MLCC). Parts are grouped into two categories:

Direct Equivalents (25V Rating): Parts maintaining identical voltage rating of 25V with all other parameters matching the original specification. These provide one-to-one functional replacement.

Upgraded Alternatives (50V Rating): Parts with elevated voltage rating of 50V while maintaining all other electrical and mechanical parameters. These provide enhanced voltage margin within the same package footprint and are suitable for applications where higher voltage headroom is beneficial.

All substitute parts maintain MSL 1 classification, RoHS3 compliance, and REACH unaffected status where applicable.

Parameter Comparison

Manufacturer	Part Number	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness (Max)	Product Status
Panasonic	ECJ-2YF1E334Z	0.33 µF	-20%, +80%	25V	Y5V (F)	0805	0.049" (1.25mm)	Obsolete
KEMET	C0805C334Z3VAC7800	0.33 µF	-20%, +80%	25V	Y5V (F)	0805	0.035" (0.88mm)	Active
YAGEO	CC0805ZRY5V8BB334	0.33 µF	-20%, +80%	25V	Y5V (F)	0805	0.035" (0.90mm)	Active
Samsung Electro-Mechanics	CL21F334ZACNNNC	0.33 µF	-20%, +80%	25V	Y5V (F)	0805	0.037" (0.95mm)	Active
KYOCERA AVX	KGM21CV51E334ZU	0.33 µF	-20%, +80%	25V	Y5V (F)	0805	0.037" (0.95mm)	Active
YAGEO	CC0805ZRY5V9BB334	0.33 µF	-20%, +80%	50V	Y5V (F)	0805	0.057" (1.45mm)	Active
Samsung Electro-Mechanics	CL21F334ZBFNNNE	0.33 µF	-20%, +80%	50V	Y5V (F)	0805	0.053" (1.35mm)	Active
Samsung Electro-Mechanics	CL21F334ZBFNNNG	0.33 µF	-20%, +80%	50V	Y5V (F)	0805	0.053" (1.35mm)	Active
KYOCERA AVX	KGM21CV51H334ZU	0.33 µF	-20%, +80%	50V	Y5V (F)	0805	0.037" (0.95mm)	Active

Engineering Selection Recommendations

For Direct Replacement (25V Applications): Select from C0805C334Z3VAC7800 (KEMET), CC0805ZRY5V8BB334 (YAGEO), CL21F334ZACNNNC (Samsung Electro-Mechanics), or KGM21CV51E334ZU (KYOCERA AVX). All direct equivalents are active products with RoHS3 compliance and MSL 1 rating. KEMET and YAGEO options offer reduced thickness (0.035" and 0.90mm respectively), which may provide assembly advantages in space-constrained designs.

For Upgraded Voltage Rating (50V Applications): Select from CC0805ZRY5V9BB334 (YAGEO), CL21F334ZBFNNNE or CL21F334ZBFNNNG (Samsung Electro-Mechanics), or KGM21CV51H334ZU (KYOCERA AVX). Upgraded parts maintain identical capacitance, tolerance, and temperature coefficient while providing 50V rating. KYOCERA AVX KGM21CV51H334ZU offers the lowest profile thickness at 0.037" (0.95mm) among 50V options.

All substitute parts maintain compliance certifications and moisture sensitivity levels equivalent to or better than the original specification.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V rated capacitor in place of a 25V rated capacitor?

A: Yes. The 50V rated alternatives (CC0805ZRY5V9BB334, CL21F334ZBFNNNE, CL21F334ZBFNNNG, KGM21CV51H334ZU) are direct functional replacements for 25V applications. Higher voltage rating provides additional safety margin and does not degrade performance in lower voltage circuits.

Q: Are there thickness differences between substitute parts?

A: Yes. Direct 25V equivalents range from 0.035" to 0.049" thickness. Upgraded 50V parts range from 0.037" to 0.057" thickness. Verify PCB assembly clearance requirements before selection, particularly for KGM21CV51H334ZU (50V, 0.037") which offers the most compact profile among upgraded options.

Q: What is the significance of the Y5V temperature coefficient?

A: Y5V indicates the capacitor exhibits -82% to +22% capacitance change across the -30°C to +85°C operating range. This specification is maintained across all substitute parts, ensuring equivalent performance in temperature-variable environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed carry RoHS3 compliance certification. The original Panasonic ECJ-2YF1E334Z is obsolete; all recommended alternatives are currently active products with full compliance documentation.

Q: What packaging options are available?

A: Direct equivalents are available in Tape & Reel (TR) and standard packaging. Samsung Electro-Mechanics CL21F334ZBFNNNG offers Cut Tape (CT) & Digi-Reel® packaging. Verify procurement requirements with your supply chain before final selection.

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