Nexperia USA Inc. BAT17,235

Overview

BAT17 from Nexperia is a planar Schottky barrier diode in SOT23 package, designed for high-frequency signal routing in UHF mixer and sampling circuits. It delivers 4 V reverse voltage rating, 30 mA forward current capability, 1 pF capacitance at 1 MHz/0 V, 600 mV forward voltage at 10 mA, and 0.25 µA reverse leakage at 3 V - enabling low-loss RF detection and phase-sensitive applications.

For engineers reviewing the BAT17 datasheet, BAT17 pinout, BAT17 application, or BAT17 equivalent, key selection criteria include its 1 pF junction capacitance, 15 Ω forward resistance at 5 mA, 8 dB noise figure at 900 MHz, low 350–600 mV VF range, and SOT23-compatible footprint for compact RF layout integration.

Technical Context

The BAT17 operates as a zero-bias detector diode with minimal junction capacitance and low series resistance, optimized for signal demodulation below 1 GHz. Its planar Schottky construction ensures fast carrier response and stable performance across −40 °C to +100 °C junction temperature.

With no internal connection on Pin 2, the device implements a two-terminal active structure in a three-pin SOT23 outline - simplifying PCB layout while maintaining mechanical robustness and thermal dissipation via the standard SOT23 pad pattern.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), plastic surface-mounted, 3-lead outline per JEDEC MO-215AA. Standard thermal resistance R_{th j-a} = 500 K/W under recommended mounting conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HSMS-2850 and 1N5711, BAT17 uniquely balances ultra-low capacitance (1 pF), moderate forward voltage (600 mV), and SOT23 scalability - making it optimal for cost-sensitive, space-constrained UHF sampling and mixer designs where leakage and layout parasitics dominate performance.

Availability

BAT17 is available at Aetrix Electronics and suitable for UHF mixer design, RF sampling circuit development, and phase-sensitive detector implementation requiring stable component supply across industrial and consumer wireless programs.

Supply support for BAT17 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

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.

The BAT17 belongs to Nexperia's RF Schottky diode product line, engineered specifically for low-capacitance, low-noise signal detection and mixing in sub-1 GHz wireless infrastructure and portable electronics.

FAQ

Is BAT17 suitable for use as a zero-bias detector?

Yes. The BAT17 is explicitly characterized for zero-bias operation in UHF mixer and sampling applications. Its low 350 mV forward voltage at 0.1 mA and 1 pF capacitance enable reliable RF detection without external bias, as confirmed in the datasheet's noise figure and forward voltage curves at microampere-level currents.

What is the thermal resistance of BAT17 and how does it affect layout?

The BAT17 has a junction-to-ambient thermal resistance of 500 K/W under standard SOT23 mounting conditions. This value assumes minimal copper area; designers should use thermal vias and ≥10 mm² copper pour under the exposed pad (if applicable) to maintain Tj ≤100 °C at 30 mA continuous current.

Can Pin 2 be grounded or left floating in PCB layout?

Pin 2 is internally not connected and must remain unconnected on the PCB - neither grounded nor tied to any net. Connecting it risks mechanical stress on the bond wire or unintended coupling; the datasheet explicitly labels it "n.c." and shows no internal die connection in Fig.1.

How does BAT17's noise figure compare to other Schottky diodes in its class?

At 900 MHz, BAT17 exhibits an 8 dB noise figure - measured with a 2 mA local oscillator current. This is competitive with industry-standard RF Schottky diodes like HSMS-2850 (7.5 dB) and superior to general-purpose types such as 1N5711 (>15 dB), confirming its suitability for receiver front-end detection where SNR preservation is critical.