onsemi PN2222ARLRA

Overview

PN2222ARLRA from onsemi is an NPN silicon general-purpose transistor in TO-92 package, rated for 40 V_CEO, 600 mA continuous collector current, and 625 mW power dissipation at T_A = 25°C. It delivers DC current gain (h_FE) of 100–300 at I_C = 10 mA, V_CE = 10 V, and supports switching applications with t_d ≤ 10 ns, t_r ≤ 25 ns, and f_T = 300 MHz - commonly used in low-voltage amplifier stages and digital logic interface circuits.

For engineers reviewing the PN2222ARLRA datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO/V_CBO ratings, h_FE consistency across temperature, saturation voltage at defined I_C/I_B ratios, thermal resistance (R_θJA = 200°C/W), and TO-92 mechanical compatibility with legacy through-hole PCB layouts.

Technical Context

The PN2222ARLRA operates as a medium-speed, low-power NPN bipolar junction transistor optimized for linear amplification and saturated switching. Its design emphasizes stable h_FE over –55°C to +150°C, low leakage (I_CBO ≤ 0.01 µA, I_CEX ≤ 10 nA), and predictable V_CE(sat) ≤ 0.3 V at I_C = 150 mA/I_B = 15 mA.

It features f_T = 300 MHz at I_C = 20 mA/V_CE = 20 V, C_obo ≤ 8.0 pF, and noise figure NF ≤ 4.0 dB at I_C = 100 µA - confirming suitability for audio preamplifier and RF front-end biasing where gain stability and low-noise operation are required.

Key Specifications

Pinout & Package

PN2222ARLRA uses the industry-standard TO-92 (Case 29, Style 1) plastic package with 3 leads, 5.2 mm max height, and 2.54 mm lead pitch. The package is compatible with wave soldering and manual prototyping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with MMBT2222ALT1G and BC547C, PN2222ARLRA offers verified through-hole manufacturability, guaranteed switching timing parameters, and preferred-device lifecycle assurance - making it optimal for cost-sensitive, repairable, or mixed-technology designs requiring proven reliability.

Availability

PN2222ARLRA is available at Aetrix Electronics and suitable for audio preamplifier stages, microcontroller GPIO interfaces, and DC motor speed control applications requiring stable component supply, long-term obsolescence management, and consistent parametric performance across production batches.

Supply support for PN2222ARLRA 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

PN2222ARLRA belongs to onsemi's legacy general-purpose transistor product line, engineered for broad compatibility, ease of use, and long-lifecycle support in cost-sensitive, high-volume applications ranging from consumer electronics to industrial controls.

FAQ

What is the maximum operating temperature for PN2222ARLRA?

The PN2222ARLRA has a specified operating junction temperature range of –55°C to +150°C. Its thermal resistance R_θJA is 200°C/W, so sustained operation above 85°C ambient requires careful power derating or heatsinking. The device remains functional up to its absolute maximum T_J of +150°C, but long-term reliability is best maintained below +125°C junction temperature. Always verify thermal design using actual PCB layout and airflow conditions.

Is PN2222ARLRA pin-compatible with the original PN2222?

Yes, PN2222ARLRA is mechanically and electrically pin-compatible with PN2222 - both use TO-92 package with identical pinout (Emitter=1, Base=2, Collector=3). However, PN2222ARLRA is the PN2222A variant, offering improved specifications: higher V_CEO (40 V vs. 30 V), higher V_CBO (75 V vs. 60 V), and tighter h_FE distribution. No PCB changes are needed for drop-in replacement.

What does the "RLRA" suffix mean in PN2222ARLRA?

The "RLRA" suffix in PN2222ARLRA indicates tape-and-reel packaging: "R" = reel, "L" = 2000 units per reel, "RA" = standard onsemi tape-and-reel specification for TO-92 devices. This format supports automated insertion equipment and ensures consistent orientation and spacing for high-volume assembly. It does not affect electrical characteristics - PN2222ARLRA shares identical silicon and performance with PN2222A in bulk or ammo-pack formats.

Can PN2222ARLRA be used in linear regulator pass transistor applications?

PN2222ARLRA is not recommended as a pass transistor in linear regulators due to its limited power dissipation (625 mW at 25°C ambient) and relatively high V_CE(sat) under high-current conditions. While it can handle brief transient loads up to 500 mA, sustained operation above 200 mA risks thermal runaway without aggressive heatsinking. For linear regulator use, dedicated pass transistors with higher P_D, lower R_θJC, and SOA-rated safe operating area are preferred.

Does PN2222ARLRA meet RoHS and REACH compliance requirements?

Yes, PN2222ARLRA is RoHS-compliant and REACH-conformant per onsemi's published environmental documentation. It contains no lead in solderable terminations (lead-free matte tin plating), and all substances of concern are below threshold limits defined in Directive 2011/65/EU and Regulation (EC) No. 1907/2006. Full compliance data, including material declarations and conflict minerals statements, is available via onsemi's official product page for PN2222ARLRA.