BB149A,115 Nexperia Diode (Small Outline Diode) In Stock
The Nexperia BB149A,115 is a compact UMD varactor diode engineered for voltage-controlled frequency tuning applications. It delivers an 8.45:1 tuning ratio with capacitance ranging from 18.22 pF minimum, rated for 30 V reverse bias operation. This high-performance component is stocked worldwide with same-day shipping.
- Manufacturer
- Nexperia
- Package
- Small Outline Diode
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- BB149A,115 Datasheet PDF
- Category
- Diode
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8.45:1 tuning ratio for wide frequency modulation range
- 18.22 pF minimum capacitance in compact UMD package
- 30 V reverse bias rating for robust circuit protection
Applications
The BB149A,115 excels in VCO (voltage-controlled oscillator) circuits, FM modulators, and phase-locked loop filters where precise frequency tuning is critical. Its small form factor and high tuning ratio make it ideal for compact RF and microwave receiver designs requiring 50–1000 MHz operation windows.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the capacitance range and tuning ratio of the Nexperia BB149A,115 at 30 V reverse bias?
The BB149A,115 provides a minimum capacitance of 18.22 pF with an 8.45:1 tuning ratio across its 30 V reverse bias rating. This wide tuning range enables frequency shifts from approximately 50 MHz to over 1000 MHz in VCO designs, making it suitable for broad-band RF applications where dynamic frequency control is essential.
How does the UMD package design benefit compact PCB layouts in RF oscillator circuits?
The UMD (ultra-miniature diode) package offers a 2-pin configuration with minimal parasitic inductance, reducing trace routing overhead and enabling tight PCB routing. Compared to through-hole varactors, the UMD package reduces occupied PCB area by approximately 70 % and simplifies multi-layer board design for high-frequency oscillators operating above 500 MHz.
When should the BB149A,115 be selected over bipolar junction transistor-based tuning in FM modulator design?
The BB149A,115 is preferred when monotonic capacitance–voltage response and linear frequency deviation are critical; its 8.45:1 ratio and 18.22 pF minimum ensure predictable FM modulation indices. BJT-based tuning introduces nonlinear gain variations, making varactor-based designs superior for wideband FM systems requiring ±75 kHz deviation within a 30 V control range.
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