UP050B183K-B-BZ Equivalent & Substitute Parts

Part Overview

The UP050B183K-B-BZ is a 0.018 µF ceramic capacitor rated for 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 maintains general-purpose application suitability with straight lead configuration and MSL 1 rating.

Substiute Parts

UP050B183K-B-BZ

Taiyo YudenIn Stock: 996UP050B183K-B-BZ Datasheet

Current PartRFQ

A183K15X7RF5UAA

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP050B183K-B-BZ is determined by strict equivalence across the following parameters:

Mandatory Matching Criteria:

• Capacitance value: 0.018 µF (exact match required)
• Voltage rating: 50V minimum
• Tolerance: ±10% or tighter
• Mounting type: Through-hole axial configuration
• Lead style: Straight leads

Compatible Variation Criteria:

• Temperature coefficient: X7R is acceptable as it provides superior temperature stability compared to B coefficient, with wider operating range (-55°C ~ 125°C versus -25°C ~ 85°C)
• Physical dimensions: Minor variations in diameter and length are acceptable provided the component fits within PCB hole spacing and clearance constraints
• Packaging format: Tape & Box (TB) is compatible with bulk component handling

The substitute part A183K15X7RF5UAA meets all mandatory criteria and provides enhanced performance characteristics through X7R temperature coefficient specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: A183K15X7RF5UAA

The A183K15X7RF5UAA is the direct functional equivalent for the obsolete UP050B183K-B-BZ. Selection of this substitute is based on the following engineering factors:

Product Status Consideration: The main part is classified as obsolete, while the substitute is actively manufactured. This ensures long-term availability and supply chain continuity for new designs and production runs.

Electrical Equivalence: Both components share identical capacitance (0.018 µF), tolerance (±10%), and voltage rating (50V). The substitute's X7R temperature coefficient provides superior temperature stability across a wider operating range (-55°C ~ 125°C) compared to the main part's B coefficient range (-25°C ~ 85°C).

Compliance and Certifications: The substitute meets ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements for electronic components. Both parts carry EAR99 export classification.

Physical Compatibility: Both components feature through-hole axial mounting with straight leads. The substitute exhibits slightly larger physical dimensions (0.098" Dia x 0.150" L versus 0.087" Dia x 0.126" L). PCB hole spacing and clearance must be verified during design integration to ensure mechanical fit.

Moisture Sensitivity: The substitute carries no MSL restriction, eliminating moisture sensitivity concerns present in the main part's MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can the A183K15X7RF5UAA directly replace the UP050B183K-B-BZ in existing designs?

A: Yes, the A183K15X7RF5UAA is electrically equivalent with identical capacitance, tolerance, and voltage rating. Physical dimensions are slightly larger; verify PCB hole spacing and component clearance before implementation.

Q: What is the significance of the temperature coefficient difference (B versus X7R)?

A: Temperature coefficient defines capacitance variation across temperature ranges. X7R provides tighter capacitance tolerance across temperature extremes (-55°C ~ 125°C) compared to B coefficient (-25°C ~ 85°C). For applications operating within the original -25°C ~ 85°C range, both coefficients are functionally acceptable. X7R offers superior performance margin for designs requiring extended temperature operation.

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

A: The substitute meets ROHS3 and REACH requirements, while the main part's compliance status is not specified. Both carry identical EAR99 export classification. HTSUS codes differ due to different temperature coefficient classifications (8532.23.0040 versus 8532.24.0040).

Q: What physical considerations apply when substituting this component?

A: The substitute is 0.011" larger in diameter and 0.024" longer than the main part. Verify PCB hole spacing, lead-to-lead clearance, and component-to-component spacing before PCB layout finalization. Straight lead configuration remains identical between both parts.

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

A: The substitute is supplied in Tape & Box (TB) packaging, suitable for automated assembly and bulk component handling. The main part packaging format is not specified in available documentation.

Q: Why is the main part classified as obsolete?

A: Obsolescence classification indicates the manufacturer has discontinued production. The substitute remains in active production, ensuring procurement availability for current and future applications.