NXP Semiconductors BAP63-05W,115

Overview

BAP63-05W,115 from NXP Semiconductors is a silicon PIN diode in common-cathode dual configuration, designed for high-frequency RF switching up to 3 GHz. It delivers low diode capacitance (0.3–0.4 pF at 1 MHz), low forward resistance (0.9–3.5 Ω at 100 MHz), and fast charge carrier lifetime (310 ns), enabling precise RF attenuator and switch control in compact SOT323 packages.

For engineers reviewing the BAP63-05W,115 datasheet, BAP63-05W,115 pinout, BAP63-05W,115 application, or BAP63-05W,115 equivalent, key selection criteria include reverse voltage rating (50 V), forward current capability (100 mA), thermal resistance (250 K/W), isolation performance (7–14.5 dB across 900–2450 MHz), and SOT323 package compatibility with high-density RF layouts.

Technical Context

The BAP63-05W,115 integrates two planar PIN diodes sharing a single cathode terminal, forming a compact dual-diode structure optimized for series-mode RF signal routing. Its low series inductance (1.5 nH) and minimal parasitic capacitance support stable impedance matching in 50 Ω stripline circuits.

Operation relies on forward-bias conduction to minimize insertion loss (as low as 0.11 dB at 900 MHz/100 mA) and reverse-bias blocking to maximize isolation (up to 14.5 dB at 900 MHz). Charge carrier lifetime of 310 ns enables predictable turn-off timing in pulsed RF control applications.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), 3-lead surface-mount plastic package with dimensions 2.2 × 1.35 × 1.15 mm (L × W × H), optimized for RF layout density and thermal dissipation via soldering point.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SKY13314-374LF and BAP64-05W,115, the BAP63-05W,115 offers optimal balance of dual-diode integration, 310 ns switching speed, and 0.3 pF capacitance at 20 V - making it uniquely suited for space-constrained, multi-path RF switch designs requiring common-cathode simplicity.

Availability

BAP63-05W,115 is available at Aetrix Electronics and suitable for cellular front-end modules, Wi-Fi band-selection circuits, and RF test equipment requiring stable component supply, consistent parametric performance, and long-term SOT323 package availability.

Supply support for BAP63-05W,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 specializing in high-performance RF, analog, and mixed-signal solutions for communications, automotive, and industrial markets.

The BAP63-05W,115 belongs to NXP's discrete RF PIN diode product line, engineered specifically for GHz-range signal routing, attenuation, and switching in compact wireless infrastructure and portable radio systems.

FAQ

What is the maximum operating frequency of the BAP63-05W,115?

The BAP63-05W,115 is characterized for operation up to 3 GHz, with measured isolation and insertion loss data provided at 900 MHz, 1800 MHz, and 2450 MHz. Its low capacitance (0.3 pF) and series inductance (1.5 nH) maintain stable RF performance through this range, making the BAP63-05W,115 suitable for cellular, Wi-Fi, and Bluetooth front-end applications.

How is the common cathode configuration used in circuit design?

The common cathode configuration of the BAP63-05W,115 allows both anodes (Pins 1 and 2) to be independently biased while sharing a single return path (Pin 3). This simplifies DC bias network layout and enables compact dual-path RF switching - for example, in antenna diversity or band-select filter architectures - without requiring separate cathode traces. The BAP63-05W,115 thus reduces PCB area and parasitic coupling versus discrete diode solutions.

What thermal considerations apply to the BAP63-05W,115 under full-rated current?

With a junction-to-soldering-point thermal resistance of 250 K/W and 240 mW total power dissipation limit, the BAP63-05W,115 can sustain 100 mA forward current only if the soldering point temperature remains ≤90 °C. At ambient temperatures near 70 °C, board-level copper pour and thermal vias are recommended to maintain safe junction temperature. The BAP63-05W,115 datasheet specifies Tj limits of −65 to +150 °C, but sustained operation above 125 °C degrades reliability.

Can the BAP63-05W,115 replace the BAP64-05W,115 in existing designs?

Yes - the BAP63-05W,115 and BAP64-05W,115 share identical SOT323 packaging, pinout, and dual-anode/common-cathode topology. While the BAP63-05W,115 exhibits slightly lower forward resistance (0.9–3.5 Ω vs. 1.1–4.0 Ω) and marginally lower capacitance (0.3–0.4 pF vs. 0.32–0.42 pF), it is a functional and mechanically compatible alternative where tighter RF loss specs are beneficial. The BAP63-05W,115 does not require PCB changes.

What is the significance of the 310 ns charge carrier lifetime in practical use?

The 310 ns charge carrier lifetime of the BAP63-05W,115 directly determines its turn-off speed in RF switching applications. When biased from 10 mA forward to 6 mA reverse, the BAP63-05W,115 achieves 90% off-state recovery within this timeframe - critical for meeting guard intervals in LTE TDD and TD-SCDMA systems. This parameter ensures predictable timing margins without overshoot or ringing in fast-switched RF paths.