Nexperia USA Inc. PXT2222A,115

Overview

PXT2222A from Nexperia is an NPN bipolar junction transistor (BJT) designed for medium-power switching and linear amplification in surface-mounted applications. It delivers 600 mA continuous collector current, supports 40 V collector-emitter voltage, and achieves DC current gain (h_FE) of 100–300 at 150 mA/10 V. Its SOT89 package enables efficient thermal transfer via die pad mounting-commonly used in DC-DC converter switching stages and LED driver current control circuits.

For engineers reviewing the PXT2222A datasheet, PXT2222A pinout, PXT2222A application, or PXT2222A equivalent, key selection criteria include verified saturation voltage (V_CEsat ≤ 1.2 V at I_C = 150 mA), pulsed switching performance (t_on ≤ 35 ns, t_off ≤ 250 ns), thermal resistance (R_th(j-a) = 113 K/W with 6 cm² copper pad), and compatibility with standard FR4 PCB reflow profiles.

Technical Context

The PXT2222A operates as a general-purpose NPN BJT with base-controlled current amplification. Its design targets discrete switching functions where low V_CEsat and fast turn-on/off times are required-particularly in non-isolated buck regulators and load-switching circuits operating below 40 V.

It features a planar epitaxial die structure optimized for stable h_FE across temperature (−55 °C to 150 °C) and exhibits low leakage (I_CBO ≤ 10 nA at 25 °C). The SOT89 package integrates a large collector die pad to support power dissipation up to 1.1 W with adequate PCB copper area.

Key Specifications

Pinout & Package

The PXT2222A is housed in a SOT89 (SC-62/TO-243) plastic surface-mounted package with a thermally enhanced die pad connected to the collector terminal. Dimensions: 4.6 mm × 2.6 mm × 1.8 mm (L × W × H); lead pitch: 1.5 mm; recommended reflow footprint per Fig. 13.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT2222ALT1G, the PXT2222A provides 2.2× higher continuous current and 2.7× better thermal resistance-making it superior for power-dense switching. Versus ZTX653, it trades 20 V V_CEO margin for faster turn-off and tighter h_FE consistency, favoring high-frequency digital control.

Availability

PXT2222A is available at Aetrix Electronics and suitable for DC-DC converter switching stages, LED constant-current drivers, industrial relay drivers, and microcontroller GPIO expander circuits requiring stable component supply and consistent SOT89 thermal performance.

Supply support for PXT2222A 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 semiconductor expert specializing in high-volume, high-reliability discrete and logic devices, with roots in NXP's standard product division and independent operation since 2017.

The PXT2222A belongs to Nexperia's medium-power bipolar transistor family, engineered for cost-sensitive industrial and consumer power management applications where robustness, thermal performance, and manufacturability are prioritized over ultra-high-speed or RF optimization.

FAQ

What is the maximum continuous collector current for PXT2222A under standard PCB conditions?

The PXT2222A supports 600 mA continuous collector current when mounted on an FR4 PCB with a 6 cm² copper mounting pad for the collector terminal, achieving 1.1 W total power dissipation at 25 °C ambient. With smaller pads (1 cm² or standard footprint), derating applies per Figure 1 in the datasheet.

Can PXT2222A replace BC847B in a 5 V logic interface circuit?

No-BC847B is a low-current general-purpose transistor (100 mA I_C, SOT23), while PXT2222A is a medium-power device (600 mA, SOT89) with different gain profile, saturation behavior, and thermal requirements. Substitution would require PCB redesign, drive strength reassessment, and thermal validation.

Does PXT2222A have automotive qualification?

No-the PXT2222A is not AEC-Q101 qualified. Nexperia explicitly states in Section 15.3 of the datasheet that non-automotive qualified products are unsuitable for automotive use unless separately validated by the customer. It lacks automotive-grade screening, test reports, and guaranteed PPAP documentation.

What is the recommended base resistor value for switching a 300 mA load at 5 V supply?

With h_FE(min) = 100 and target I_B = I_C/10 = 30 mA, and V_BEsat ≈ 1.0 V (from Table 7), the base resistor should be R_B = (5 V − 1.0 V)/30 mA = 133 Ω. A standard 120 Ω ±5% resistor ensures reliable saturation while limiting base current to 33 mA within IBM rating.