UP050B183K-KFCZ Equivalent & Substitute Parts

Part Overview

The UP050B183K-KFCZ is a 0.018 µF ceramic capacitor rated at 50V with B temperature coefficient, manufactured by Taiyo Yuden in axial through-hole configuration. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part features ±10% capacitance tolerance and operates across -25°C to 85°C temperature range, suitable for general-purpose applications in legacy and new designs requiring compatible specifications.

Substiute Parts

UP050B183K-KFCZ

Taiyo YudenIn Stock: 910UP050B183K-KFCZ Datasheet

Current PartRFQ

A183K15X7RF5UAA

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1071A183K15X7RF5UAA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP050B183K-KFCZ is determined by strict equivalence across electrical and mechanical parameters. The primary substitute identified is the A183K15X7RF5UAA from Vishay Beyschlag/Draloric/BC Components.

Substitution Criteria Met:

• Capacitance Value: Both parts specify 0.018 µF
• Voltage Rating: Both rated at 50V
• Tolerance: Both maintain ±10% tolerance
• Mounting Configuration: Both are through-hole axial components with straight leads
• Temperature Coefficient: Substitute uses X7R (superior stability) versus original B coefficient; X7R encompasses the B operating range and provides enhanced temperature stability
• Operating Temperature: Substitute range of -55°C to 125°C exceeds the original -25°C to 85°C requirement
• Product Status: Substitute is active production, ensuring long-term availability

The A183K15X7RF5UAA qualifies as a direct functional equivalent with improved environmental performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: A183K15X7RF5UAA

The A183K15X7RF5UAA is the qualified equivalent for the obsolete UP050B183K-KFCZ. Selection of this substitute is supported by the following engineering factors:

• Electrical Equivalence: Identical capacitance, voltage rating, and tolerance specifications ensure circuit performance parity
• Enhanced Reliability: X7R temperature coefficient provides superior capacitance stability across the operating temperature range compared to B coefficient
• Extended Operating Range: The -55°C to 125°C operating window exceeds original specifications, providing design margin for thermal extremes
• Active Production Status: The substitute is in active production, eliminating obsolescence risk and ensuring long-term supply chain stability
• Regulatory Compliance: ROHS3 and REACH compliance certifications meet current environmental and chemical safety requirements
• Physical Compatibility: Axial through-hole configuration with straight leads maintains PCB insertion compatibility; dimensional increase (0.098" Dia x 0.150" L versus 0.087" Dia x 0.126" L) requires verification of board layout clearance

Implementation Consideration: Confirm PCB layout accommodates the slightly larger physical dimensions of the substitute before design release.

Frequently Asked Questions (FAQ)

Q: Can the A183K15X7RF5UAA directly replace the UP050B183K-KFCZ without circuit modification?

A: Yes. Both components share identical electrical specifications (0.018 µF, 50V, ±10% tolerance) and mounting configuration (through-hole axial). The substitute's X7R temperature coefficient provides superior performance within the original operating range. Physical dimensions differ slightly; PCB layout clearance must be confirmed.

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

A: B coefficient specifies capacitance change of ±15% across -25°C to 85°C. X7R specifies ±15% change across -55°C to 125°C, providing wider temperature stability. X7R is functionally superior for the original application range.

Q: Are there any compliance differences between the original and substitute?

A: The original UP050B183K-KFCZ compliance status is not specified in available documentation. The substitute A183K15X7RF5UAA is ROHS3 compliant and REACH unaffected, meeting current environmental and chemical safety standards. This represents an improvement for new designs and regulatory compliance.

Q: What is the impact of the dimensional difference?

A: The substitute is 0.011" larger in diameter and 0.024" longer. This difference is within typical PCB layout tolerances for axial components but requires verification of board clearance, particularly in high-density layouts or near adjacent components.

Q: Is the substitute available in the same packaging format?

A: The original part is specified with "-" packaging notation. The substitute is supplied in Tape & Box (TB) format, standard for active production components. This packaging is suitable for both manual and automated assembly processes.

Q: Can the substitute be used in legacy equipment repair?

A: Yes. The electrical and mechanical equivalence of the A183K15X7RF5UAA makes it suitable for repair and rework of equipment originally designed with the UP050B183K-KFCZ. The enhanced temperature stability and extended operating range provide improved reliability in legacy applications.