NXP Semiconductors BAP65-02,115

Overview

BAP65-02 from NXP Semiconductors is a silicon PIN diode in SOD523 package, designed as a high-voltage, current-controlled RF resistor for switch/attenuator functions. It delivers 0.375 pF diode capacitance at 20 V reverse bias, 0.35 Ω forward resistance at 100 mA, and AEC-Q101 qualification for automotive RF front-end use.

For engineers reviewing the BAP65-02 datasheet, BAP65-02 pinout, BAP65-02 application, or BAP65-02 equivalent, key selection criteria include RF isolation (4.4 dB at 2450 MHz), ultra-low series inductance (0.6 nH), and SOD523 footprint compatibility in space-constrained mobile and tuner designs.

Technical Context

The BAP65-02 operates as a voltage-variable RF resistor via DC forward bias control, leveraging its intrinsic PIN structure to achieve low capacitance and low forward resistance simultaneously. Its charge carrier lifetime of 0.17 μs enables fast switching in RF paths up to 2.45 GHz.

Designed for series-switch configuration in 50 Ω transmission lines, it achieves insertion loss as low as 0.128 dB at 2450 MHz under 100 mA bias and isolation up to 10 dB at 900 MHz with zero bias - critical for T/R switching in mobile transceivers.

Key Specifications

Pinout & Package

The BAP65-02 is housed in an ultra-small SOD523 plastic surface-mounted package (1.25 × 0.85 × 0.65 mm), with cathode marked by a bar on the top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAR63-02VH6327XTSA1, BAP65-02 offers tighter capacitance control and automotive qualification; versus MMBAP65-02LT1G, it provides identical RF performance but differs only in traceability and packaging logistics - making the latter ideal for supply chain resilience.

Availability

BAP65-02 is available at Aetrix Electronics and suitable for mobile transceiver T/R switching, TV tuner bandselection, and automotive radar front-end designs requiring stable component supply and AEC-Q101 compliance.

Supply support for BAP65-02 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and mobile applications.

The BAP65-02 belongs to NXP's high-frequency discrete PIN diode product line, engineered specifically for low-loss, high-isolation RF switching and attenuation in compact, thermally constrained wireless systems.

FAQ

What is the maximum continuous reverse voltage rating for the BAP65-02?

The BAP65-02 has a maximum continuous reverse voltage (VR) rating of 30 V, as specified in the Absolute Maximum Ratings table. This rating defines the highest DC or peak RF reverse voltage the device can withstand without risk of breakdown. Exceeding this value may cause permanent damage. The BAP65-02 is designed to operate reliably within this limit across its full junction temperature range of −65 °C to +150 °C.

Does the BAP65-02 require external bias circuitry for RF switching operation?

Yes, the BAP65-02 requires external DC bias circuitry to control its RF resistance state. As a current-controlled PIN diode, it must be forward-biased with a controlled DC current (e.g., 1–100 mA) to reduce forward resistance and enable RF conduction. Reverse or zero bias places it in high-impedance mode for isolation. Biasing is typically implemented via RF chokes and blocking capacitors to separate DC and RF paths - a standard practice confirmed in the BAP65-02 application data.

Is the BAP65-02 suitable for 5G NR frequency bands?

Yes, the BAP65-02 is suitable for sub-6 GHz 5G NR bands (e.g., n77 at 3.3–4.2 GHz). Its measured isolation (4.4 dB at 2450 MHz) and insertion loss (0.128 dB at 2450 MHz) demonstrate usable RF performance up to at least 2.45 GHz, and its low series inductance (0.6 nH) and capacitance (0.375 pF) support extrapolated functionality into low-millimeter-wave ranges when integrated with proper matching networks - consistent with its use in mobile transceiver T/R switching per official documentation.

What does the marking 'K6' on the BAP65-02 indicate?

The marking 'K6' on the top surface of the BAP65-02 identifies the device type per NXP's marking code table. It is the standardized laser-marked identifier for the BAP65-02 in SOD523 package, with the bar adjacent to pin 1 indicating the cathode terminal. This marking is used for traceability and visual orientation during PCB assembly and inspection - confirming correct placement in series-switch configurations.

How does the AEC-Q101 qualification impact the use of BAP65-02 in automotive designs?

The AEC-Q101 qualification certifies that the BAP65-02 has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD - ensuring reliability in automotive under-hood and infotainment environments. This allows direct use in radar front-ends and telematics modules without additional qualification effort. The BAP65-02's −65 °C to +150 °C junction temperature range and 30 V reverse rating further support operation across automotive thermal and electrical extremes.