UP050B104K-A-BZ Equivalent & Substitute Parts

Part Overview

The UP050B104K-A-BZ is a 0.1 µF ceramic capacitor rated for 50V with axial through-hole mounting, manufactured by Taiyo Yuden. This component features a B temperature coefficient and operates across -25°C to 85°C. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain the same capacitance value, voltage rating, and tolerance while accommodating different mounting technologies and temperature characteristics.

Substiute Parts

UP050B104K-A-BZ

Taiyo YudenIn Stock: 3943UP050B104K-A-BZ Datasheet

Current PartRFQ

UMK105B7104KV-FR

Taiyo YudenIn Stock: 10029UMK105B7104KV-FR Datasheet

SimilarRFQ

A104K15X7RF5TAA

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 8386A104K15X7RF5TAA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the UP050B104K-A-BZ is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 0.1 µF
• Voltage Rating: 50V
• Tolerance: ±10%
• RoHS3 Compliance

Flexible Parameters (Application-Dependent):

• Temperature Coefficient: B (original) vs. X7R (substitute options)
• Mounting Type: Through Hole (original) vs. Surface Mount (alternative)
• Operating Temperature Range: -25°C ~ 85°C (original) vs. -55°C ~ 125°C (substitute options)

Two substitute categories are identified:

1. Direct Axial Substitute (A104K15X7RF5TAA): Maintains through-hole axial mounting with identical capacitance, voltage, and tolerance. Offers extended temperature range (-55°C ~ 125°C) and X7R temperature coefficient with active product status.

2. Surface Mount Alternative (UMK105B7104KV-FR): Provides identical electrical specifications in 0402 (1005 Metric) surface-mount package. Suitable for applications requiring compact form factor and automated assembly.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Through-Hole Axial Applications):

The A104K15X7RF5TAA is the primary substitute for the UP050B104K-A-BZ. Both components maintain axial through-hole mounting with identical electrical specifications (0.1 µF, ±10%, 50V). The A104K15X7RF5TAA carries active product status, ensuring long-term availability and supply chain stability. The X7R temperature coefficient provides superior temperature stability across -55°C ~ 125°C compared to the original B coefficient range of -25°C ~ 85°C. ROHS3 compliance is maintained. This substitute is suitable for legacy circuit board designs requiring through-hole component compatibility.

For New Design Implementations (Surface Mount):

The UMK105B7104KV-FR offers equivalent electrical performance in a compact 0402 surface-mount package. This component maintains identical capacitance, voltage rating, and tolerance specifications. The X7R temperature coefficient and extended operating range (-55°C ~ 125°C) provide enhanced performance margins. Surface-mount technology enables automated assembly and reduced board space. Product status is listed as "Not For New Designs," indicating this part may have limited future availability; however, it remains suitable for applications where surface-mount technology is required and component sourcing is confirmed.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and EAR99 export classification, matching the original component's regulatory status.

Frequently Asked Questions (FAQ)

Q: Can the A104K15X7RF5TAA directly replace the UP050B104K-A-BZ in existing circuit boards?

A: Yes. Both components are axial through-hole capacitors with identical capacitance (0.1 µF), tolerance (±10%), and voltage rating (50V). Physical dimensions differ slightly (0.098" Dia x 0.150" L vs. 0.087" Dia x 0.126" L), but both fit standard through-hole spacing. The A104K15X7RF5TAA's X7R temperature coefficient provides wider operating range (-55°C ~ 125°C) compared to the original B coefficient (-25°C ~ 85°C).

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

A: Temperature coefficient defines capacitance variation across operating temperature ranges. B coefficient (original part) specifies behavior within -25°C ~ 85°C. X7R coefficient (substitute parts) specifies behavior within -55°C ~ 125°C with tighter tolerance specifications. X7R provides more stable capacitance across wider temperature extremes.

Q: Is the UMK105B7104KV-FR suitable for new product designs?

A: The UMK105B7104KV-FR is classified as "Not For New Designs." While electrically equivalent, this designation indicates potential future discontinuation. For new designs requiring surface-mount 0.1 µF 50V capacitors, alternative active-status components should be evaluated. The A104K15X7RF5TAA is recommended for new through-hole designs due to its active product status.

Q: What are the physical mounting differences between axial and surface-mount packages?

A: The UP050B104K-A-BZ and A104K15X7RF5TAA use axial through-hole mounting, requiring insertion into drilled holes on printed circuit boards with manual or wave soldering. The UMK105B7104KV-FR uses surface-mount technology (0402 package), requiring placement on board surface with reflow soldering. Axial components suit legacy boards; surface-mount components suit modern automated assembly.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The UP050B104K-A-BZ, A104K15X7RF5TAA, and UMK105B7104KV-FR are all ROHS3 compliant, meeting lead-free and hazardous substance restrictions.

Q: What is Moisture Sensitivity Level (MSL) and why does it differ between parts?

A: MSL indicates component sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited) means the component has no moisture sensitivity restrictions. The A104K15X7RF5TAA lists "Not Applicable," indicating through-hole ceramic components do not require MSL classification. The UMK105B7104KV-FR lists MSL 1, consistent with surface-mount ceramic capacitors.