ECJ-2VB1C124K Equivalent & Substitute Parts

Part Overview

The ECJ-2VB1C124K is a 0.12 µF ±10% 16V ceramic capacitor in X7R temperature coefficient, 0805 (2012 Metric) package manufactured by Panasonic Electronic Components. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Capacitance	0.12 µF
Tolerance	±10%
Voltage Rating	16V
Temperature Coefficient	X7R
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C ~ 125°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ECJ-2VB1C124K is determined by strict equivalence in the following parameters: capacitance value (0.12 µF), tolerance (±10%), voltage rating (16V minimum), temperature coefficient (X7R), package format (0805), and mounting type (Surface Mount MLCC). All substitute parts must maintain the same operating temperature range (-55°C ~ 125°C) and moisture sensitivity level (MSL 1).

Parts are grouped into two categories:

Direct Equivalents (16V Rated): Parts meeting all primary specifications with identical voltage rating and tolerance.

Upgrade Options: Parts with enhanced specifications (higher voltage rating or tighter tolerance) that maintain full backward compatibility while providing improved performance margins.

Parameter Comparison

Manufacturer	Part Number	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Status	Thickness
Panasonic	ECJ-2VB1C124K	0.12 µF	±10%	16V	X7R	0805	Obsolete	0.037" (0.95mm)
KEMET	C0805C124K4RAC7800	0.12 µF	±10%	16V	X7R	0805	Active	0.035" (0.88mm)
KYOCERA AVX	KGM21NR71C124KM	0.12 µF	±10%	16V	X7R	0805	Active	0.039" (1.00mm)
KYOCERA AVX	KGM21NR71C124KT	0.12 µF	±10%	16V	X7R	0805	Active	0.039" (1.00mm)
Vishay Vitramon	VJ0805Y124KXJCW1BC	0.12 µF	±10%	16V	X7R	0805	Active	0.035" (0.90mm)
Vishay Vitramon	VJ0805Y124KXJPW1BC	0.12 µF	±10%	16V	X7R	0805	Active	0.035" (0.90mm)
KEMET	C0805C124J4RAC7800	0.12 µF	±5%	16V	X7R	0805	Active	0.035" (0.88mm)
KYOCERA AVX	KGM21ER71H124KU	0.12 µF	±10%	50V	X7R	0805	Active	0.053" (1.35mm)
KYOCERA AVX	KGM21NR71E124KT	0.12 µF	±10%	25V	X7R	0805	Active	0.039" (1.00mm)
KEMET	C0805C124J3RAC7800	0.12 µF	±5%	25V	X7R	0805	Active	0.035" (0.88mm)
KEMET	C0805C124J5RAC7800	0.12 µF	±5%	50V	X7R	0805	Active	0.039" (1.00mm)

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Choices):

C0805C124K4RAC7800 (KEMET) and VJ0805Y124KXJCW1BC (Vishay Vitramon) provide direct functional equivalence with active product status and RoHS3 compliance. Both maintain ±10% tolerance and 16V rating. KGM21NR71C124KM and KGM21NR71C124KT (KYOCERA AVX) are functionally equivalent with active status and RoHS3 compliance.

Upgrade Options (Enhanced Performance Margin):

C0805C124J4RAC7800 (KEMET) offers tighter ±5% tolerance at identical 16V rating with active status and RoHS3 compliance. KGM21NR71E124KT (KYOCERA AVX) provides 25V rating with ±10% tolerance, offering higher voltage margin. C0805C124J5RAC7800 (KEMET) delivers 50V rating with ±5% tolerance for maximum performance headroom.

KGM21ER71H124KU (KYOCERA AVX) provides 50V rating with ±10% tolerance but exhibits increased thickness (0.053"), requiring verification of PCB clearance constraints.

All recommended substitutes maintain MSL 1 rating, X7R temperature coefficient, and -55°C ~ 125°C operating range. All are RoHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can I use a 25V or 50V rated capacitor in place of the 16V ECJ-2VB1C124K?

A: Yes. Higher voltage-rated capacitors are functionally compatible in circuits designed for 16V operation. The capacitance value and tolerance remain the same; only the voltage safety margin increases. Verify PCB layout clearance, as some higher voltage options exhibit increased thickness.

Q: What is the difference between ±10% and ±5% tolerance parts?

A: Tolerance specifies the allowable deviation from the nominal 0.12 µF value. ±10% allows 0.108–0.132 µF; ±5% allows 0.114–0.126 µF. Tighter tolerance (±5%) provides better circuit performance in applications requiring precise capacitance values. Both are backward compatible.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does package thickness affect PCB design?

A: Yes. The ECJ-2VB1C124K has 0.037" (0.95mm) thickness. Substitute parts range from 0.035" to 0.053". Verify PCB clearance, particularly for KGM21ER71H124KU (0.053"), to ensure no interference with adjacent components or solder mask.

Q: Which substitute offers the best availability?

A: KGM21NR71E124KT (KYOCERA AVX) shows highest inventory (16,078 pcs). C0805C124K4RAC7800 (KEMET) and VJ0805Y124KXJPW1BC (Vishay Vitramon) also maintain substantial stock levels.

Q: Can I mix different manufacturers in production?

A: Yes. All listed substitutes meet identical electrical specifications and package requirements. Mixing manufacturers is acceptable provided each part meets the specified parameters. Document part selection for traceability.

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