ECJ-1VB0J334K Equivalent & Substitute Parts

Part Overview

The ECJ-1VB0J334K is a 0.33 µF ceramic capacitor manufactured by Panasonic Electronic Components with X5R temperature coefficient, rated for 6.3V operation, and packaged in 0603 (1608 Metric) form factor. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. Substitute parts maintain the same capacitance, tolerance, voltage rating, and package specifications while offering active product status from alternative manufacturers.

Key Parameters

Parameter	Value
Capacitance	0.33 µF
Tolerance	±10%
Voltage Rating	6.3V
Temperature Coefficient	X5R
Package / Case	0603 (1608 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C ~ 85°C
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the ECJ-1VB0J334K are categorized based on electrical and mechanical compatibility. The primary substitution criterion is exact matching of capacitance (0.33 µF), tolerance (±10%), voltage rating (6.3V), temperature coefficient (X5R), and package form factor (0603/1608 Metric). Parts meeting these specifications are direct equivalents. Upgrade substitutes maintain the same capacitance, tolerance, and package but feature higher voltage ratings (10V, 16V, or 25V) or alternative temperature coefficients (X7R), providing enhanced performance margins while remaining mechanically and electrically compatible. All substitute parts maintain MSL 1 rating and surface mount configuration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Operating Temperature	Package	Product Status	RoHS Status
ECJ-1VB0J334K	Panasonic Electronic Components	0.33 µF	±10%	6.3V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Obsolete	Not specified
KGM15BR50J334KT	KYOCERA AVX	0.33 µF	±10%	6.3V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334J4RAC7867	KEMET	0.33 µF	±5%	16V	X7R	-55°C ~ 125°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334K4PAC7867	KEMET	0.33 µF	±10%	16V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334K4RAC7867	KEMET	0.33 µF	±10%	16V	X7R	-55°C ~ 125°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334K4RAL7867	KEMET	0.33 µF	±10%	16V	X7R	-55°C ~ 125°C	0603 (1608 Metric)	Active	RoHS non-compliant
C0603C334K8PAC7867	KEMET	0.33 µF	±10%	10V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334K8RAC7867	KEMET	0.33 µF	±10%	10V	X7R	-55°C ~ 125°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C0603C334K9RAC7867	KEMET	0.33 µF	±10%	6.3V	X7R	-55°C ~ 125°C	0603 (1608 Metric)	Active	ROHS3 Compliant
C1608X5R1C334K080AA	TDK Corporation	0.33 µF	±10%	16V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Not For New Designs	ROHS3 Compliant
C1608X5R1E334K080AC	TDK Corporation	0.33 µF	±10%	25V	X5R	-55°C ~ 85°C	0603 (1608 Metric)	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the obsolete ECJ-1VB0J334K, the KGM15BR50J334KT from KYOCERA AVX is the primary equivalent, matching all electrical specifications (0.33 µF, ±10%, 6.3V, X5R) and package form factor while offering active product status and ROHS3 compliance.

For applications requiring enhanced performance margins, KEMET C0603C334K4PAC7867 provides identical capacitance and tolerance with upgraded 16V rating and X5R temperature coefficient, maintaining the same operating temperature range and ROHS3 compliance. The C0603C334K4RAC7867 variant offers X7R temperature coefficient with extended operating range (-55°C ~ 125°C) and 16V rating for applications requiring superior temperature stability.

For designs operating at lower voltage levels, KEMET C0603C334K8PAC7867 and C0603C334K8RAC7867 provide 10V ratings with X5R and X7R coefficients respectively, both ROHS3 compliant and actively produced.

The KEMET C0603C334K9RAC7867 matches the original 6.3V rating with X7R temperature coefficient and extended operating range, suitable for applications requiring improved temperature performance at the original voltage specification.

TDK Corporation parts C1608X5R1C334K080AA and C1608X5R1E334K080AC are classified as "Not For New Designs" and should be avoided for new product development despite ROHS3 compliance.

The KEMET C0603C334K4RAL7867 is RoHS non-compliant and should be selected only when legacy compliance requirements apply.

Frequently Asked Questions (FAQ)

Q: Can KGM15BR50J334KT directly replace ECJ-1VB0J334K without circuit modification?

A: Yes. KGM15BR50J334KT is a direct equivalent with identical capacitance (0.33 µF), tolerance (±10%), voltage rating (6.3V), temperature coefficient (X5R), and 0603 package form factor. No circuit changes are required.

Q: What is the difference between X5R and X7R temperature coefficients?

A: X5R maintains capacitance within ±15% across -55°C to 85°C. X7R maintains capacitance within ±15% across -55°C to 125°C, providing superior temperature stability over a wider operating range. X7R parts are suitable for applications requiring extended temperature performance.

Q: Can I use a 16V rated capacitor in place of the 6.3V original part?

A: Yes. Higher voltage ratings provide additional safety margin and are electrically compatible in circuits designed for lower voltages. KEMET C0603C334K4PAC7867 (16V, X5R) and C0603C334K4RAC7867 (16V, X7R) are suitable upgrades.

Q: Are all substitute parts ROHS3 compliant?

A: Most active substitutes are ROHS3 compliant. The exception is KEMET C0603C334K4RAL7867, which is RoHS non-compliant. TDK parts are ROHS3 compliant but classified as "Not For New Designs."

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture baking requirements. All listed parts maintain MSL 1 rating, ensuring consistent handling and storage procedures.

Q: Why are TDK parts marked "Not For New Designs"?

A: This designation indicates the manufacturer is phasing out these products. While functionally equivalent and compliant, they should not be selected for new product development. Active alternatives from KEMET and KYOCERA AVX are preferred.

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