NXP Semiconductors BAP65-05W,115

Overview

BAP65-05W from NXP Semiconductors is a dual-element silicon PIN diode in common-cathode configuration, housed in an SOT323 package. It delivers low diode capacitance (0.425 pF at 20 V), low forward resistance (0.35 Ω at 100 mA), and AEC-Q101 qualification for automotive-grade reliability - used as RF switch elements in mobile transmit/receive paths and TV tuner bandswitching.

For engineers reviewing the BAP65-05W datasheet, BAP65-05W pinout, BAP65-05W application, or BAP65-05W equivalent, key selection criteria include its 30 V reverse voltage rating, 100 mA continuous forward current capability, isolation performance up to 9.3 dB at 900 MHz, and SOT323 footprint compatibility with space-constrained RF front-end designs.

Technical Context

The BAP65-05W integrates two PIN diodes sharing a single cathode terminal, enabling compact series-shunt RF switching topologies without external interconnects. Its charge carrier lifetime of 0.17 μs supports fast RF switching transitions in cellular and broadcast frequency bands.

Designed for current-controlled RF resistance behavior, the device exhibits tunable insertion loss (0.06 dB at 900 MHz, 100 mA) and isolation (3.5 dB at 2450 MHz, zero bias), with diode capacitance varying from 0.7 pF (0 V) to 0.425 pF (20 V) - critical for impedance matching across 900 MHz to 2.45 GHz operation.

Key Specifications

Pinout & Package

SOT323 plastic surface-mounted package (3-lead, 1.35 mm × 1.15 mm footprint); thermal resistance R_th(j-sp) = 250 K/W supports power dissipation up to 240 mW at solder point ≤ 90 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-PIN diode RF switching applications.

Compared with BAR64-03W and MMBD6550, the BAP65-05W uniquely provides integrated common-cathode dual functionality in SOT323, reducing component count by 50% and eliminating inter-device parasitics - critical for sub-1 GHz to 2.5 GHz RF front-end miniaturization.

Availability

BAP65-05W is available at Aetrix Electronics and suitable for RF attenuators and switches, TV tuner bandswitching, and mobile communication transmit/receive switching requiring stable component supply and automotive-grade reliability.

Supply support for BAP65-05W 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 specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in RF, analog, and automotive electronics.

The BAP65-05W belongs to NXP's high-frequency PIN diode product line, engineered specifically for current-controlled RF switching and attenuation in automotive infotainment, broadcast tuners, and mobile infrastructure - emphasizing low capacitance, fast switching, and AEC-Q101 compliance.

FAQ

What is the maximum reverse voltage rating for the BAP65-05W?

The BAP65-05W has a maximum continuous reverse voltage (VR) rating of 30 V, as specified in the Absolute Maximum Ratings table. This allows reliable off-state blocking in RF signal paths operating up to 24 V supply rails. Exceeding this voltage risks permanent junction damage. The BAP65-05W must be biased within this limit during all operational and transient conditions to ensure long-term reliability.

How does the common-cathode configuration of the BAP65-05W affect PCB layout?

The common-cathode configuration of the BAP65-05W consolidates both diode cathodes into Pin 3, eliminating the need for external cathode interconnection and reducing parasitic inductance in high-frequency paths. This simplifies RF layout by enabling direct grounding of Pin 3 with minimal trace length, improving isolation and insertion loss consistency. The BAP65-05W thus supports tighter RF routing compared to discrete dual-diode solutions.

What is the typical diode capacitance of the BAP65-05W at 20 V reverse bias?

The typical diode capacitance (Cd) of the BAP65-05W at 20 V reverse bias is 0.425 pF, measured at 1 MHz. This low value ensures minimal capacitive loading on RF transmission lines, supporting broadband impedance matching from UHF through 2.5 GHz. The BAP65-05W maintains sub-1 pF capacitance across its full 0–20 V reverse bias range, critical for stable filter and matching network performance.

Is the BAP65-05W suitable for automotive applications?

Yes, the BAP65-05W is AEC-Q101 qualified, confirming its suitability for automotive applications including telematics antennas, digital radio tuners, and V2X communication modules. It operates across -40 °C to +85 °C ambient temperature and meets stress testing requirements for vibration, thermal cycling, and humidity. The BAP65-05W is explicitly rated for automotive use per its official NXP product data sheet Rev. 3.1.

What is the forward resistance of the BAP65-05W at 100 mA forward current?

The typical forward resistance (rD) of the BAP65-05W at 100 mA forward current is 0.35 Ω, measured at 100 MHz. This low resistance minimizes I²R losses and insertion loss in high-current RF on-states, directly contributing to efficient power transfer in transmit paths. The BAP65-05W maintains this performance across its rated junction temperature range, supporting robust operation in thermally demanding RF front-ends.