UP050B273K-NACZ Equivalent & Substitute Parts

Part Overview

The UP050B273K-NACZ is a 0.027 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 production requirements. 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

UP050B273K-NACZ

Taiyo YudenIn Stock: 850UP050B273K-NACZ Datasheet

Current PartRFQ

A273K15X7RF5UAA

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 884A273K15X7RF5UAA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP050B273K-NACZ is determined by strict equivalence across electrical and mechanical parameters. The primary substitute identified is the A273K15X7RF5UAA from Vishay Beyschlag/Draloric/BC Components.

Substitution Criteria Met:

• Capacitance: Both parts rated 0.027 µF (exact match)
• Voltage Rating: Both rated 50V (equivalent)
• Tolerance: Both ±10% (equivalent)
• Mounting Type: Both through-hole axial configuration (compatible)
• Lead Style: Both straight leads (compatible)
• Temperature Coefficient: Substitute uses X7R (superior stability compared to B coefficient)
• Operating Temperature: Substitute range -55°C to 125°C exceeds original -25°C to 85°C requirement
• Product Status: Substitute is active production status, ensuring availability

The A273K15X7RF5UAA provides enhanced performance characteristics while maintaining full electrical and mechanical compatibility with the original UP050B273K-NACZ specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: A273K15X7RF5UAA

The A273K15X7RF5UAA is the qualified equivalent for the obsolete UP050B273K-NACZ. Selection of this substitute is based on the following engineering factors:

1. Electrical Equivalence: Identical capacitance (0.027 µF), tolerance (±10%), and voltage rating (50V) ensure direct functional replacement in circuit applications.

2. Enhanced Temperature Performance: The X7R temperature coefficient provides superior capacitance stability across the operating range compared to the B coefficient of the original part. The extended operating temperature range (-55°C to 125°C) exceeds the original specification (-25°C to 85°C), providing additional design margin.

3. Mechanical Compatibility: Both parts feature through-hole axial mounting with straight leads, enabling direct PCB substitution. Physical dimensions differ slightly (substitute is 0.098" Dia x 0.150" L versus original 0.087" Dia x 0.126" L); PCB layout verification is required to confirm clearance compatibility.

4. Regulatory Compliance: The substitute meets ROHS3 and REACH requirements, ensuring compliance with current environmental and safety standards. Both parts share identical EAR99 export classification.

5. Product Availability: The substitute maintains active production status with confirmed inventory (845 Pcs), addressing the obsolescence of the original part and ensuring long-term supply chain continuity.

6. Packaging: The substitute is supplied in Tape & Box (TB) format, standard for production environments.

Frequently Asked Questions (FAQ)

Q: Can the A273K15X7RF5UAA directly replace the UP050B273K-NACZ without circuit modification?

A: Yes. Both parts share identical electrical specifications (0.027 µF, ±10%, 50V). The substitute's superior temperature coefficient (X7R versus B) and extended operating range provide enhanced performance without requiring circuit redesign. Physical dimensions differ slightly; verify PCB layout clearance before implementation.

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

A: Temperature coefficient defines capacitance variation across operating temperature. B coefficient exhibits greater capacitance drift than X7R. The X7R coefficient in the substitute provides tighter capacitance stability, making it suitable for applications requiring consistent performance across temperature extremes.

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

A: The substitute (A273K15X7RF5UAA) is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original part's compliance status is not specified. Both parts carry identical EAR99 export classification and HTSUS codes within the ceramic capacitor category.

Q: What is the physical size difference, and does it affect PCB compatibility?

A: The substitute is slightly larger: 0.098" Dia x 0.150" L (2.50mm x 3.80mm) versus the original 0.087" Dia x 0.126" L (2.20mm x 3.20mm). Both are axial through-hole components with straight leads. PCB layout verification is required to confirm adequate clearance around the component footprint and adjacent circuitry.

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

A: The substitute is supplied in Tape & Box (TB) format, standard for production and automated assembly. The original part's packaging format is not specified. Confirm packaging requirements for your production process.

Q: Why is the original part classified as obsolete?

A: Obsolescence indicates the manufacturer (Taiyo Yuden) has discontinued production of the UP050B273K-NACZ. The A273K15X7RF5UAA remains in active production, ensuring continued availability for new designs and legacy system support.

Q: Can the substitute be used in applications requiring the specific B temperature coefficient?

A: The X7R coefficient provides superior stability compared to B. If the original design specifically requires B coefficient characteristics, circuit analysis is necessary to determine if X7R performance is acceptable. In most general-purpose applications, X7R is functionally superior and directly compatible.