ECJ-0EF1H103Z Equivalent & Substitute Parts

Part Overview

The ECJ-0EF1H103Z is a 10000 pF ceramic capacitor rated at 50V with Y5V temperature coefficient in 0402 (1005 Metric) surface mount package, manufactured by Panasonic Electronic Components. This part is currently obsolete, making equivalent and substitute components necessary for ongoing production, maintenance, and design continuity. The ECJ series has been discontinued, requiring engineers to identify compatible alternatives from active manufacturers while maintaining electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	10000 pF
Tolerance	-20%, +80%
Voltage - Rated	50V
Temperature Coefficient	Y5V (F)
Operating Temperature Range	-30°C ~ 85°C
Package / Case	0402 (1005 Metric)
Mounting Type	Surface Mount, MLCC
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)
Thickness (Max)	0.022" (0.55mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters: capacitance value (10000 pF), tolerance range (-20%, +80%), voltage rating (50V minimum), temperature coefficient (Y5V), package type (0402), and mounting configuration (Surface Mount, MLCC). All substitute parts must maintain identical or superior electrical ratings and physical dimensions to ensure drop-in compatibility.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalent (04025G103ZAT2A): Identical electrical specifications and package dimensions. Manufactured by KYOCERA AVX with active product status and full compliance certifications.

Parametric Equivalent (CC0402ZRY5V9BB103): Identical electrical specifications and package dimensions. Manufactured by YAGEO with active product status and full compliance certifications.

Similar Part with Voltage Derating (CC0402ZRY5V7BB103): Matches capacitance, tolerance, temperature coefficient, and package specifications. Voltage rating is 16V (lower than the 50V requirement). This part is suitable only for applications where the circuit voltage requirement does not exceed 16V.

Parameter Comparison

Parameter	ECJ-0EF1H103Z (Main)	04025G103ZAT2A (Direct Equivalent)	CC0402ZRY5V9BB103 (Parametric Equivalent)	CC0402ZRY5V7BB103 (Similar - Lower Voltage)
Manufacturer	Panasonic Electronic Components	KYOCERA AVX	YAGEO	YAGEO
Capacitance	10000 pF	10000 pF	10000 pF	10000 pF
Tolerance	-20%, +80%	-20%, +80%	-20%, +80%	-20%, +80%
Voltage - Rated	50V	50V	50V	16V
Temperature Coefficient	Y5V (F)	Y5V (F)	Y5V (F)	Y5V (F)
Operating Temperature	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)	0402 (1005 Metric)
Mounting Type	Surface Mount, MLCC	Surface Mount, MLCC	Surface Mount, MLCC	Surface Mount, MLCC
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)
Thickness (Max)	0.022" (0.55mm)	0.022" (0.56mm)	0.022" (0.55mm)	0.022" (0.55mm)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	Not specified	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Full Specification Compliance (50V Rating Required):

Select either 04025G103ZAT2A (KYOCERA AVX) or CC0402ZRY5V9BB103 (YAGEO). Both parts are active products with identical electrical and mechanical specifications to the obsolete ECJ-0EF1H103Z. Both manufacturers provide ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Inventory availability is substantial for both options (35,573 pcs and 13,895 pcs respectively), ensuring supply chain continuity.

For Applications with Lower Voltage Requirements (16V or Below):

CC0402ZRY5V7BB103 (YAGEO) is acceptable only when circuit design specifications confirm that the maximum operating voltage does not exceed 16V. This part maintains all other critical parameters including capacitance, tolerance, temperature coefficient, and package dimensions. Use of this part in circuits exceeding 16V violates electrical safety margins and component ratings.

Frequently Asked Questions (FAQ)

Q: Can I use CC0402ZRY5V7BB103 as a direct replacement for ECJ-0EF1H103Z?

A: No. CC0402ZRY5V7BB103 has a 16V voltage rating, while ECJ-0EF1H103Z is rated for 50V. Use this part only if your circuit operates at 16V or below. For applications requiring 50V rating, use 04025G103ZAT2A or CC0402ZRY5V9BB103.

Q: Are all substitute parts physically compatible with the original PCB layout?

A: Yes. All substitute parts use the 0402 (1005 Metric) package with identical footprint dimensions (0.039" L x 0.020" W). Maximum thickness specifications are within 0.01" variation (0.55mm to 0.56mm), which is within standard PCB assembly tolerances.

Q: What is the difference between a direct equivalent and a parametric equivalent?

A: Both 04025G103ZAT2A and CC0402ZRY5V9BB103 are parametric equivalents with identical electrical specifications. The distinction reflects manufacturer sourcing options. Both are equally suitable for replacement applications.

Q: Do the substitute parts meet current regulatory compliance?

A: Yes. Both 04025G103ZAT2A and CC0402ZRY5V9BB103 are ROHS3 compliant and REACH unaffected. The original ECJ-0EF1H103Z compliance status was not specified in available documentation.

Q: What is MSL 1 (Unlimited) and why does it matter?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. These parts do not require special dry-pack storage or baking procedures prior to assembly, simplifying logistics and manufacturing processes.

Q: Can I mix substitute parts from different manufacturers in the same production run?

A: Yes. Both KYOCERA AVX and YAGEO parts meet identical electrical and mechanical specifications. However, maintaining single-source components per design revision is recommended for traceability and quality control documentation.

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