NXP Semiconductors BB131,115

Overview

BB131,115 from NXP Semiconductors is a VHF variable capacitance diode (varactor) fabricated in planar technology and housed in an SOD323 (SC-76) surface-mount package. It delivers a capacitance range of 8–17 pF at 0.5 V reverse bias and 0.7–1.055 pF at 28 V, with a minimum capacitance ratio of 12:1 and series resistance ≤3 Ω at 470 MHz - enabling precise electronic tuning in satellite tuner front-ends.

For engineers reviewing the BB131,115 datasheet, BB131,115 pinout, BB131,115 application, or BB131,115 equivalent, key selection criteria include its VHF capacitance linearity, low-series-resistance performance at RF frequencies, SOD323 footprint compatibility, and thermal stability across −55 °C to +125 °C junction operation.

Technical Context

The BB131,115 operates as a reverse-biased junction varactor, where applied DC voltage modulates depletion-layer width to control capacitance. Its planar silicon construction ensures repeatable C–V characteristics with typical temperature coefficient <1×10⁴ K⁻¹ across 0–85 °C.

Designed for VHF-band tuning, it supports continuous reverse voltages up to 30 V and exhibits ≤10 nA leakage at 30 V/25 °C. The device's 2-pin SOD323 package places cathode (Pin 1) and anode (Pin 2) on a 2.3 mm × 1.35 mm footprint with 0.65 mm lead pitch.

Key Specifications

Pinout & Package

Package: SOD323 (SC-76), plastic surface-mounted, 2-lead, 2.3 mm × 1.35 mm body, 0.65 mm lead pitch. Marking bar denotes cathode (Pin 1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Compared with BB204,115 and SMV1232-011, the BB131,115 uniquely balances VHF capacitance range, linearity, and thermal stability - making it the preferred varactor for satellite tuner front-ends where 100–1000 MHz coverage and ±20 ppm/°C C–V drift must coexist.

Availability

BB131,115 is available at Aetrix Electronics and suitable for satellite tuners, VCO-based frequency synthesizers, and tunable RF coupling networks requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BB131,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company delivering high-performance mixed-signal and standard products, with leadership in RF, analog, and power management technologies.

The BB131,115 belongs to NXP's discrete RF varactor family, engineered specifically for electronic tuning in broadcast and satellite reception systems where precision C–V linearity and SMD manufacturability are essential.

FAQ

What is the maximum reverse voltage rating for BB131,115?

The BB131,115 has a maximum continuous reverse voltage (VR) rating of 30 V, per IEC 60134 Absolute Maximum Ratings. Operation beyond this voltage risks permanent junction damage. At VR = 28 V, the device achieves its specified minimum capacitance of 0.7 pF, confirming safe operation near the limit while maintaining functional C–V behavior.

How does BB131,115 differ from BB132 in practical circuit use?

The BB131,115 and BB132 share the SOD323 package but differ in capacitance range: BB131,115 offers 8–17 pF at 0.5 V, while BB132 provides 4–8 pF. This makes BB131,115 better suited for lower-VHF tuning (e.g., FM radio front-ends), whereas BB132 targets higher-frequency VCOs needing tighter C-range control. Both exhibit identical series resistance and thermal specs.

Is BB131,115 suitable for automotive applications?

No - the BB131,115 is not automotive-qualified. Per NXP's product status documentation, it is designated for general industrial and consumer applications only. It lacks AEC-Q200 stress testing, and its qualification data applies to commercial temperature range (−55 °C to +125 °C) without automotive-grade reliability validation or PPAP support.

What is the typical capacitance temperature coefficient of BB131,115?

The BB131,115 exhibits a typical capacitance temperature coefficient (TC_C) of <1×10⁴ K⁻¹ across 0–85 °C at fixed reverse bias, as shown in Figure 4 of its datasheet. This low drift ensures stable tuning accuracy in satellite receivers exposed to ambient temperature swings, with measured C-shift <±0.5% over the full operating range.

Can BB131,115 be used in place of BB109 in an existing design?

BB131,115 is not a direct replacement for BB109: BB109 uses SOD123 packaging (3.7 × 1.6 mm) and has different C–V characteristics (C_0.5V = 27–40 pF). While both are NXP varactors, BB131,115's smaller SOD323 footprint and narrower capacitance range require PCB layout revision and retuning of associated LC networks to maintain target frequency response.