UP050B153K-A-BZ Equivalent & Substitute Parts

Part Overview

The UP050B153K-A-BZ is a 0.015 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 maintains ROHS3 compliance and operates across the -25°C to 85°C temperature range, suitable for general-purpose applications in legacy and new designs requiring this specific capacitance value.

Key Parameters

Parameter	Value	Criticality for Substitution
Capacitance	0.015 µF	Critical Match Required
Voltage Rating	50V	Critical Match Required
Tolerance	±10%	Critical Match Required
Mounting Type	Through Hole Axial	Critical Match Required
Temperature Coefficient	B	Functional Consideration
Operating Temperature Range	-25°C ~ 85°C	Application Dependent
RoHS Status	ROHS3 Compliant	Compliance Requirement
Moisture Sensitivity Level	1 (Unlimited)	Handling Consideration

Substitute Part Grouping Explanation

Substitution of the UP050B153K-A-BZ is determined by strict equivalence across electrical and mechanical parameters. The following criteria establish valid substitution:

Mandatory Equivalence Parameters:

Capacitance value: 0.015 µF (no tolerance deviation acceptable)
Voltage rating: 50V minimum
Tolerance: ±10%
Mounting configuration: Through-hole axial
Lead style: Straight

Functional Compatibility Parameters:

Temperature coefficient classification (B or superior stability such as X7R)
Operating temperature range must encompass or exceed the original specification
RoHS3 compliance required for regulatory alignment

The substitute part A153K15X7RF5UAA meets all mandatory equivalence criteria while providing enhanced temperature stability through X7R coefficient and extended operating range (-55°C to 125°C), making it functionally superior while maintaining electrical compatibility.

Parameter Comparison

Parameter	UP050B153K-A-BZ (Original)	A153K15X7RF5UAA (Substitute)	Compatibility
Manufacturer	Taiyo Yuden	Vishay Beyschlag/Draloric/BC Components	Different Source
Capacitance	0.015 µF	0.015 µF	Exact Match
Tolerance	±10%	±10%	Exact Match
Voltage Rating	50V	50V	Exact Match
Temperature Coefficient	B	X7R	Enhanced Stability
Operating Temperature	-25°C ~ 85°C	-55°C ~ 125°C	Extended Range
Mounting Type	Through Hole	Through Hole	Exact Match
Package / Case	Axial	Axial	Exact Match
Lead Style	Straight	Straight	Exact Match
Size / Dimension	0.087" Dia x 0.126" L (2.20mm x 3.20mm)	0.098" Dia x 0.150" L (2.50mm x 3.80mm)	Slightly Larger
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Compliant
Product Status	Obsolete	Active	Active Source Available

Engineering Selection Recommendations

The A153K15X7RF5UAA serves as a direct functional substitute for the obsolete UP050B153K-A-BZ based on the following engineering criteria:

Electrical Equivalence: Both components provide identical capacitance (0.015 µF), voltage rating (50V), and tolerance (±10%), ensuring circuit performance equivalence in general-purpose applications.

Compliance Status: Both parts maintain ROHS3 compliance, satisfying regulatory requirements for new production and legacy system support.

Product Availability: The substitute part maintains active production status with documented inventory availability (623 pcs), whereas the original part is obsolete. This transition ensures supply chain continuity.

Temperature Performance: The X7R temperature coefficient of the substitute provides superior stability across a wider operating range (-55°C to 125°C) compared to the original B coefficient specification (-25°C to 85°C). This enhancement is functionally compatible with applications designed for the original part.

Physical Compatibility: The substitute exhibits slightly larger physical dimensions (0.098" Dia x 0.150" L versus 0.087" Dia x 0.126" L). PCB layout verification is required to confirm clearance in space-constrained applications, though standard through-hole axial mounting remains compatible.

Frequently Asked Questions (FAQ)

Q: Can the A153K15X7RF5UAA directly replace the UP050B153K-A-BZ in existing designs?

A: Yes, for electrical function. The substitute provides identical capacitance, voltage rating, and tolerance. Physical dimensions are slightly larger; PCB layout must be verified to confirm adequate clearance around the component footprint.

Q: What is the significance of the temperature coefficient change from B to X7R?

A: The X7R coefficient provides superior capacitance stability across temperature variations compared to B coefficient. This represents an enhancement rather than a limitation. Applications designed for B coefficient operation will function correctly with X7R components.

Q: Are there any compliance concerns with substitution?

A: No. Both components maintain ROHS3 compliance. The substitute additionally carries REACH Unaffected status, providing expanded regulatory coverage.

Q: Why is the substitute part larger in physical size?

A: Physical dimensions vary between manufacturers based on design and manufacturing processes. Both components maintain standard axial through-hole configuration with straight leads, ensuring compatibility with standard PCB mounting practices. Verify PCB layout clearances before implementation.

Q: What is the moisture sensitivity difference between the parts?

A: The original part specifies MSL 1 (Unlimited), indicating no moisture sensitivity constraints. The substitute lists MSL as Not Applicable, which is consistent with ceramic capacitor construction and presents no functional difference.

Q: Is the substitute part currently available?

A: Yes. The A153K15X7RF5UAA maintains active production status with 623 pcs documented in inventory, providing reliable supply chain access compared to the obsolete original part.

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