Nexperia USA Inc. PZT4401,115

Overview

PZT4401 from Nexperia is an NPN bipolar junction transistor (BJT) designed for medium-power switching and linear amplification, featuring a maximum collector current of 600 mA, V_CEO of 40 V, and V_CBO of 60 V. It is housed in a thermally enhanced SOT223 surface-mount package with dual collector terminals (pins 2 and 4), and is commonly used in industrial power control circuits, consumer appliance motor drivers, and DC-DC converter switch stages.

For engineers reviewing the PZT4401 datasheet, PZT4401 pinout, PZT4401 application, or PZT4401 equivalent, key selection considerations include its DC current gain (h_FE = 100–300 at I_C = 150 mA), low V_CE(sat) (≤750 mV at I_C = 500 mA), thermal resistance (R_{th j-a} = 109 K/W), and SOT223 mounting requirements for reliable power dissipation.

Technical Context

The PZT4401 operates as a general-purpose NPN BJT with a single emitter-base-collector structure optimized for switching duty cycles up to 2% (pulse test conditions). Its h_FE varies significantly with collector current - from 20 at 0.1 mA to 300 at 150 mA - requiring bias network design that accounts for gain nonlinearity across operating range.

Switching performance is characterized by fast turn-on (t_on = 35 ns) and moderate turn-off (t_off = 250 ns), supported by low storage time (t_s = 200 ns) and a transition frequency f_T of 250 MHz at I_C = 20 mA/V_CE = 10 V, confirming suitability for low-to-moderate frequency (<5 MHz) digital and analog signal control.

Key Specifications

Pinout & Package

The PZT4401 is supplied in a plastic surface-mounted SOT223 (SC-73) package with four leads and an exposed collector pad for enhanced thermal conduction. The package measures 6.7 × 3.7 × 1.8 mm and features a 1 cm² copper mounting area recommended for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN switching transistor applications.

Compared with NSS40301MR6T1G and DXT4401-13, the PZT4401 offers the lowest V_CE(sat) among SOT223 NPNs rated for 600 mA, making it optimal for thermally constrained, high-efficiency switching where gain variation is manageable via circuit design.

Availability

PZT4401 is available at Aetrix Electronics and suitable for industrial motor control, consumer appliance power stages, and DC-DC converter switches requiring stable component supply and long-term manufacturability.

Supply support for PZT4401 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 semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-volume, high-reliability components for automotive, industrial, and consumer markets.

The PZT4401 belongs to Nexperia's legacy General Purpose Transistor product line, engineered for cost-effective, thermally robust switching in space-constrained PCBs where SOT223's thermal pad delivers superior power handling versus smaller packages.

FAQ

What is the maximum continuous collector current for PZT4401?

The PZT4401 is rated for a maximum DC collector current of 600 mA under standard mounting conditions (1 cm² copper pad, T_amb ≤ 25 °C). At higher ambient temperatures or with reduced copper area, derating is required per the thermal resistance R_{th j-a} = 109 K/W and maximum junction temperature of 150 °C.

Is PZT4401 pin-compatible with PZT4403?

No - PZT4401 (NPN) and PZT4403 (PNP) share the same SOT223 package and pinout numbering (pin 1 = base, pins 2&4 = collector/emitter reversed), but their polarity and biasing requirements differ fundamentally. Direct substitution without circuit redesign will cause functional failure.

Can PZT4401 be used in linear amplifier configurations?

Yes - the PZT4401 supports linear operation with h_FE specified from 0.1 mA to 150 mA and V_CE up to 40 V. However, its gain variation across current and temperature requires careful bias network design; it is not optimized for high-fidelity audio but suitable for precision current sources or sensor interface stages.

Does PZT4401 require a heatsink in typical applications?

Not typically - the SOT223 package's exposed collector pad provides sufficient thermal conduction when soldered to ≥1 cm² of 1-oz copper. With P_tot = 1150 mW and R_{th j-a} = 109 K/W, junction temperature rise is ~125 K at full power, so heatsinking is only needed if ambient exceeds 25 °C or power dissipation exceeds 900 mW continuously.