BB145,115 Varactor Diode Equivalent & Substitute Parts

Part Overview

The BB145,115 is a single varactor diode manufactured by NXP USA Inc., designed for voltage-controlled capacitance applications in the 6V range. It features a Surface Mount SOD-523 package and operates across the temperature range of -55°C to 150°C. This part is classified as Obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The BB145,115 delivers a capacitance of 3.25pF at 4V (1MHz) with a capacitance ratio of 2.0 (C1/C4), meeting ROHS3 compliance and unlimited moisture sensitivity requirements.

Substiute Parts

BB145,115

NXP USA Inc.In Stock: 944BB145,115 Datasheet

Current PartRFQ

BB145B,115

NXP USA Inc.In Stock: 15186BB145B,115 Datasheet

DirectRFQ

BBY5302VH6327XTSA1

Infineon TechnologiesIn Stock: 2215BBY5302VH6327XTSA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BB145,115 is determined by the following critical parameters:

• Package Compatibility: All substitutes must use SC-79 or SOD-523 Surface Mount packages to ensure PCB footprint compatibility
• Voltage Rating: Maximum reverse voltage must be 6V or greater
• Diode Configuration: Single diode type only
• Mounting Type: Surface Mount required
• Compliance: ROHS3 compliance and MSL 1 rating mandatory
• Capacitance Range & Ratio: Substitutes must operate within acceptable capacitance values at specified bias voltages and maintain comparable capacitance ratios for circuit performance

Based on these criteria, two substitute parts are identified:

Direct Substitute (Same Manufacturer): BB145B,115 from NXP USA Inc. maintains identical package, voltage rating, and compliance specifications with active product status.

Cross-Manufacturer Substitute: BBY5302VH6327XTSA1 from Infineon Technologies provides equivalent package and voltage specifications with active product status, though with different capacitance characteristics and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

BB145B,115 is the primary substitute for the obsolete BB145,115. Both parts are manufactured by NXP USA Inc. and share identical package, voltage rating, temperature range, and compliance certifications. The BB145B,115 maintains active product status with significantly higher inventory availability (15,100 pcs vs. 853 pcs), ensuring long-term supply continuity. Capacitance variation (2.95pF vs. 3.25pF at 4V) and capacitance ratio difference (2.2 vs. 2.0) are within acceptable substitution parameters for varactor applications.

BBY5302VH6327XTSA1 from Infineon Technologies serves as a cross-manufacturer alternative when NXP supply is constrained. This part maintains SC-79/SOD-523 package compatibility and 6V voltage rating with active product status. The operating temperature range is reduced to -55°C to 125°C (versus 150°C maximum for the original), which may limit suitability for high-temperature applications. Capacitance characteristics differ (3.1pF @ 3V with 2.6 ratio), requiring circuit-level evaluation for specific tuning range requirements.

All three parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can BB145B,115 be used as a direct drop-in replacement for BB145,115?

A: Yes. Both parts share identical SC-79/SOD-523 package footprints, 6V voltage rating, -55°C to 150°C operating temperature range, and compliance certifications. Capacitance values differ slightly (2.95pF vs. 3.25pF at 4V), which is acceptable for varactor substitution within typical circuit tolerances.

Q: What are the key differences between the NXP and Infineon substitutes?

A: BB145B,115 (NXP) maintains identical operating temperature range (-55°C to 150°C) and capacitance measurement conditions (4V, 1MHz). BBY5302VH6327XTSA1 (Infineon) operates to 125°C maximum and measures capacitance at 3V rather than 4V, with a higher capacitance ratio (2.6 vs. 2.0-2.2). Package and voltage ratings remain compatible across both options.

Q: Are there packaging differences between these substitutes?

A: All three parts use SC-79/SOD-523 Surface Mount packages. BB145B,115 is available in Cut Tape (CT) and Digi-Reel® packaging. BBY5302VH6327XTSA1 uses PG-SC79-2 supplier device package designation but maintains the same physical SC-79/SOD-523 footprint. Verify packaging format availability with your supplier for production requirements.

Q: Which substitute should be selected for high-temperature applications above 125°C?

A: BB145B,115 is the appropriate choice, as it maintains the full -55°C to 150°C operating range of the original BB145,115. BBY5302VH6327XTSA1 is limited to 125°C maximum junction temperature and is unsuitable for applications requiring higher thermal operation.

Q: Do all substitutes meet the same compliance requirements?

A: Yes. BB145B,115 and BBY5302VH6327XTSA1 are both ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original BB145,115 specifications. Both parts are REACH Unaffected and carry EAR99 ECCN classification.