Nexperia USA Inc. PMBD353,215

Overview

PMBD353 from Nexperia is a planar Schottky barrier double diode in SOT23 package, configured as two independent diodes sharing a common terminal (anode of D1 and cathode of D2). It delivers low forward voltage (600 mV @ 10 mA), low capacitance (1 pF @ 0 V), and reverse voltage rating of 4 V per diode - optimized for UHF mixer and phase detection circuits in RF front-ends.

For engineers reviewing the PMBD353 datasheet, PMBD353 pinout, PMBD353 application, or PMBD353 equivalent, key selection criteria include its dual-diode topology with shared terminal, sub-1 pF junction capacitance at RF frequencies, 30 mA continuous forward current capability, and thermal resistance of 500 K/W under standard SOT23 mounting.

Technical Context

The PMBD353 integrates two Schottky diodes on a single silicon die with a common connection (Pin 3 = anode of D1 / cathode of D2), enabling compact balanced RF signal routing. Its low-barrier metal-semiconductor junction yields fast switching (<1 ns recovery) and minimal stored charge - critical for sampling and modulation at UHF frequencies.

Thermal performance is defined by R_{th j-a} = 500 K/W under standard SOT23 PCB mounting, and electrical behavior is characterized across −40 °C to +100 °C ambient, with VF drift <150 mV over that range at IF = 1 mA.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, 1.3 mm × 2.9 mm footprint, 1.1 mm height, standard JEDEC-compliant outline.

Key Features

Applications

Availability

PMBD353 is available at Aetrix Electronics and suitable for UHF mixer circuits, phase detection systems, sampling circuits, and modulator front-ends requiring stable component supply and consistent parametric performance across production lots.

Supply support for PMBD353 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, formed in 2017 following the spin-off of NXP's Standard Products business.

The PMBD353 belongs to Nexperia's Schottky diode portfolio, engineered specifically for high-frequency signal processing in automotive radar, wireless infrastructure, and consumer RF modules.

FAQ

What is the pin configuration of the PMBD353 and how is the common terminal used?

Pin 1 is cathode of Diode 1, Pin 2 is anode of Diode 2, and Pin 3 is the common terminal - electrically connecting anode of D1 and cathode of D2. This configuration enables compact balanced mixer and ring-modulator designs without external wiring, reducing parasitic inductance and improving UHF symmetry.

Can the PMBD353 be used in 2.4 GHz applications?

Yes - its 1 pF junction capacitance and Schottky construction support operation up to 2.4 GHz in sampling and detector roles, provided layout minimizes pad inductance and ground return impedance. Performance is verified in typical application curves up to 1 GHz; extrapolation to 2.4 GHz requires board-level validation of insertion loss and isolation.

How does the PMBD353 compare to the PMBD351 in terms of electrical performance?

The PMBD351 is a single Schottky diode in SOT23, while the PMBD353 integrates two diodes with a shared terminal. Electrically, both share identical VF (600 mV @ 10 mA) and Cd (1 pF), but the PMBD353 adds functional integration for differential or balanced topologies - eliminating one component and two solder joints in mixer designs.

Is the PMBD353 suitable for automotive-grade temperature operation?

It operates from −65 °C to +150 °C storage and up to +100 °C junction temperature. While not AEC-Q200 qualified, its thermal and electrical specs meet requirements for under-hood infotainment RF sections and body-control module sensor interfaces when derated per Nexperia's application notes.