Equivalent & Substitute Parts for 2220J2000684MXT

Part Overview

The 2220J2000684MXT is a 0.68 µF ceramic capacitor rated at 200V with X7R temperature coefficient, manufactured by Knowles Syfer in 2220 (5750 Metric) package format. This part is currently active in production with 782 units in stock. Substitute parts are necessary when the original manufacturer discontinues production, when design requirements change, or when alternative sourcing improves supply chain resilience while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	0.68 µF
Voltage Rating	200V
Temperature Coefficient	X7R
Tolerance	±20%
Package / Case	2220 (5750 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 2220J2000684MXT is determined by the following criteria:

Mandatory Parameters for Direct Substitution:

Capacitance: 0.68 µF (exact match required)
Package / Case: 2220 (5750 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Parameter Variations:

Voltage Rating: May be equal to or higher than 200V
Temperature Coefficient: X7R or X7T (both acceptable for general purpose applications)
Tolerance: May be ±10% or ±20%

Substitute parts are grouped into two categories: Upgrade substitutes (higher voltage rating or improved tolerance) and Manufacturer Recommended substitutes (higher voltage rating with different temperature coefficient).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage Rating	Temperature Coefficient	Tolerance	Package	Thickness (Max)	Product Status	Inventory
2220J2000684MXT	Knowles Syfer	0.68 µF	200V	X7R	±20%	2220 (5750 Metric)	0.098" (2.50mm)	Active	782 Pcs
C2220C684KARAC7800	KEMET	0.68 µF	250V	X7R	±10%	2220 (5750 Metric)	0.057" (1.45mm)	Active	1515 Pcs
C5750X7R2E684K230KA	TDK Corporation	0.68 µF	250V	X7R	±10%	2220 (5750 Metric)	0.098" (2.50mm)	Not For New Designs	1693 Pcs
C5750X7R2E684K230KM	TDK Corporation	0.68 µF	250V	X7R	±10%	2220 (5750 Metric)	0.098" (2.50mm)	Not For New Designs	1237 Pcs
C5750X7T2W684K200KA	TDK Corporation	0.68 µF	450V	X7T	±10%	2220 (5750 Metric)	0.087" (2.20mm)	Active	2150 Pcs
C5750X7T2W684M200KA	TDK Corporation	0.68 µF	450V	X7T	±20%	2220 (5750 Metric)	0.087" (2.20mm)	Not For New Designs	1304 Pcs

Engineering Selection Recommendations

For Active Production Designs: C2220C684KARAC7800 (KEMET) is the primary substitute. This part maintains X7R temperature coefficient matching, offers improved tolerance (±10%), and provides higher voltage rating (250V). Product status is Active, ensuring long-term availability. Thickness is reduced to 0.057" (1.45mm), which may require PCB layout verification for clearance.

C5750X7T2W684K200KA (TDK Corporation) is the manufacturer-recommended alternative for designs requiring higher voltage margin (450V). This part is Active in production with ±10% tolerance and X7T temperature coefficient. Thickness is 0.087" (2.20mm). The X7T coefficient provides wider temperature stability compared to X7R.

For Legacy or Existing Designs: C5750X7R2E684K230KA and C5750X7R2E684K230KM (both TDK Corporation) are electrically compatible but marked "Not For New Designs." These parts maintain X7R temperature coefficient and 250V rating. Use only when existing inventory must be maintained or design revision is not feasible.

C5750X7T2W684M200KA (TDK Corporation) is marked "Not For New Designs" and should be avoided for new applications despite Active inventory levels.

All substitute parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can C2220C684KARAC7800 be used as a direct replacement for 2220J2000684MXT? A: Yes. Both parts share identical capacitance (0.68 µF), package (2220), mounting type (Surface Mount MLCC), operating temperature range (-55°C ~ 125°C), and compliance certifications. The substitute offers higher voltage rating (250V vs 200V) and improved tolerance (±10% vs ±20%), making it functionally superior. PCB layout must accommodate the reduced thickness (0.057" vs 0.098").

Q: What is the difference between X7R and X7T temperature coefficients? A: Both X7R and X7T are acceptable temperature coefficients for this application. X7R provides ±15% capacitance change over -55°C to 125°C. X7T provides wider stability but is typically used in higher voltage applications. For general purpose use, either coefficient is acceptable.

Q: Why are some substitute parts marked "Not For New Designs"? A: Parts marked "Not For New Designs" indicate the manufacturer is phasing out production. These parts remain available from existing inventory but should not be selected for new product designs. Use only when maintaining existing production or when design revision is not feasible.

Q: Does the thickness difference between substitutes affect PCB assembly? A: Yes. C2220C684KARAC7800 has reduced thickness (0.057" vs 0.098"). Verify PCB layout clearance, solder reflow profile compatibility, and any mechanical constraints before substitution. Other substitutes maintain similar thickness to the original part.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original part's environmental and regulatory compliance.

Q: Which substitute offers the best long-term availability? A: C5750X7T2W684K200KA (TDK Corporation) is marked Active in production with the highest inventory (2150 Pcs). This part provides the strongest supply chain assurance for long-term designs.

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