FK18X5R0J106MR006 Equivalent & Substitute Parts

Part Overview

The FK18X5R0J106MR006 is a 10 µF ceramic capacitor rated at 6.3V with X5R temperature coefficient, manufactured by TDK Corporation. This component features radial through-hole mounting and is designed for general-purpose applications. The part carries a "Not For New Designs" status, indicating it has been superseded in TDK's product portfolio. Identifying equivalent substitute parts is necessary for ongoing maintenance, repair, and legacy system support where this capacitor specification remains functionally required.

Substiute Parts

FK18X5R0J106MR006

TDK CorporationIn Stock: 1035FK18X5R0J106MR006 Datasheet

Current PartRFQ

FG18X5R1E106MRT06

TDK CorporationIn Stock: 5248FG18X5R1E106MRT06 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FK18X5R0J106MR006 are identified based on the following critical parameters that determine functional compatibility:

• Capacitance Value: 10 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Temperature Coefficient: X5R (exact match required)
• Operating Temperature Range: -55°C ~ 85°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Physical Dimensions: 0.157" L x 0.098" W, 0.217" max height, 0.098" lead spacing (exact match required)
• Voltage Rating: May be equal to or higher than the original 6.3V rating

The substitute part FG18X5R1E106MRT06 meets all critical electrical and mechanical parameters. The voltage rating is increased from 6.3V to 25V, which is permissible as higher voltage-rated capacitors are functionally compatible in lower-voltage applications. The series designation changes from FK to FG, and packaging changes from Tape & Box to Cut Tape, reflecting product line evolution while maintaining electrical and physical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The FG18X5R1E106MRT06 is the qualified substitute for FK18X5R0J106MR006 based on the following engineering criteria:

Electrical Compatibility: Both parts share identical capacitance (10 µF), tolerance (±20%), temperature coefficient (X5R), and operating temperature range (-55°C ~ 85°C). The substitute's 25V rating exceeds the original 6.3V specification, ensuring safe operation in the original application circuit.

Mechanical Compatibility: Physical dimensions, lead spacing, and radial package configuration are identical, enabling direct board-level substitution without PCB redesign or mechanical rework.

Compliance & Status: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute carries "Active" product status, ensuring long-term availability and supply chain continuity compared to the original "Not For New Designs" designation.

Packaging Consideration: The substitute is supplied in Cut Tape (CT) packaging versus the original Tape & Box (TB) format. This represents a standard industry transition and does not affect component performance or compatibility.

Frequently Asked Questions (FAQ)

Q: Can FG18X5R1E106MRT06 directly replace FK18X5R0J106MR006 on the PCB?

A: Yes. Both parts are radial through-hole capacitors with identical physical dimensions (4.00mm x 2.50mm body, 5.50mm max height, 2.50mm lead spacing) and lead configuration. Direct board-level substitution is possible without modification.

Q: Why is the voltage rating different (6.3V vs 25V)?

A: The substitute part has a higher voltage rating. In circuit applications, using a capacitor with a higher voltage rating than required is standard practice and does not degrade performance. The 25V-rated part will function correctly in a 6.3V application.

Q: Are the electrical characteristics identical?

A: Yes. Both capacitors have 10 µF capacitance, ±20% tolerance, X5R temperature coefficient, and -55°C ~ 85°C operating temperature range. These parameters determine functional behavior in the circuit.

Q: What is the difference between Tape & Box and Cut Tape packaging?

A: Tape & Box (TB) and Cut Tape (CT) are supply format variations. Both deliver the same component; packaging format does not affect electrical or mechanical performance. Cut Tape is a standard industry format for active products.

Q: Is the substitute part RoHS compliant?

A: Yes. FG18X5R1E106MRT06 is ROHS3 compliant, matching the compliance status of the original part.

Q: Why is the original part marked "Not For New Designs"?

A: This designation indicates the FK series has been superseded by the FG series in TDK's product portfolio. The FG18X5R1E106MRT06 represents the current active equivalent, ensuring availability for both legacy support and new applications.