onsemi TN2219A_J05Z

Overview

TN2219A_J05Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for medium-power amplification and switching applications, with V_CEO = 40 V, I_C = 1.0 A continuous, h_FE ≥ 40 at I_C = 500 mA, and TO-5 metal-can package. It supports collector currents up to 500 mA in linear amplifier stages or saturated switch configurations in industrial control and power management circuits.

For engineers reviewing the TN2219A_J05Z datasheet, pinout, applications, or equivalent options, key selection criteria include its 40 V V_CEO, 1.0 A I_C rating, 125 °C/W R_θJC, TO-5 thermal performance, and verified h_FE behavior across 0.1–500 mA operating range.

Technical Context

The TN2219A_J05Z implements a silicon planar epitaxial NPN structure optimized for stable DC current gain and low saturation voltage in both analog amplification and digital switching modes. Its design targets operation at junction temperatures up to +150 °C with guaranteed V_(BR)CEO ≥ 40 V and V_(BR)CBO ≥ 75 V under specified test conditions.

Thermal performance is defined by R_θJC = 125 °C/W and R_θJA = 50 °C/W, enabling reliable heat dissipation in TO-5 metal-can mounting configurations. The device exhibits C_obo = 8.0 pF and C_ibo = 25 pF at 100 kHz, supporting moderate-frequency small-signal amplification with NF = 4.0 dB at 1 kHz.

Key Specifications

Pinout & Package

Package: TO-5 metal-can housing with glass-sealed leads, hermetic seal, and mechanical flat-side orientation indicator. Designed for through-hole mounting with optional heatsink interface via case contact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PN2222A and 2N2219, the TN2219A_J05Z offers superior voltage margin (40 V vs. 30 V) and higher continuous current (1.0 A vs. 600 mA), while matching 2N2219's TO-5 thermal performance-making it optimal for industrial switching where both voltage headroom and heatsink-compatible packaging are critical.

Availability

TN2219A_J05Z is available at Aetrix Electronics and suitable for industrial relay drivers, linear audio pre-amplifiers, DC motor speed controllers, and linear power supply pass transistors requiring stable component supply with hermetic packaging and proven thermal reliability.

Supply support for TN2219A_J05Z 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016. Its discrete transistor portfolio emphasized ruggedness, thermal stability, and industrial qualification.

The TN2219A_J05Z belongs to Fairchild's legacy NPN general-purpose amplifier family, engineered for medium-power linear amplification and switching in harsh-environment industrial systems where hermetic TO-5 packaging and guaranteed 150 °C junction operation were essential.

FAQ

What is the maximum collector-emitter voltage rating for TN2219A_J05Z?

The TN2219A_J05Z has a maximum collector-emitter voltage (V_CEO) rating of 40 V at T_A = 25 °C. This rating is guaranteed under open-base conditions with I_C = 10 mA. Exceeding this voltage risks irreversible breakdown. Derating is not specified beyond ambient temperature limits, so system-level voltage margins must account for transients and ripple in the TN2219A_J05Z application circuit.

Does TN2219A_J05Z have a documented h_FE range at 500 mA collector current?

Yes, the TN2219A_J05Z datasheet specifies h_FE ≥ 40 at I_C = 500 mA, V_CE = 10 V, and T_A = 25 °C. This minimum gain ensures predictable base drive sizing in saturated switching applications. At lower currents (e.g., I_C = 10 mA), h_FE rises to ≥75, confirming the device's dual-use capability in both switching and linear amplification roles using the same TN2219A_J05Z part.

What is the thermal resistance from junction to case (R_θJC) for TN2219A_J05Z?

The TN2219A_J05Z has a junction-to-case thermal resistance (R_θJC) of 125 °C/W, measured under standard test conditions. This value applies specifically to the TO-5 metal-can package and assumes direct thermal contact between the case and an external heatsink. It enables accurate junction temperature estimation in TN2219A_J05Z designs where power dissipation exceeds 0.5 W, especially in industrial ambient temperatures up to 75 °C.

Is TN2219A_J05Z supplied in tape-and-reel or bulk packaging?

TN2219A_J05Z is supplied in TO-5 metal-can packaging with EOL code J05Z, indicating "TO-5 OPTION STD, NO LEAD CLIP, 1.0 K / BOX" per Fairchild's packaging documentation. It is not offered in tape-and-reel format; instead, it ships in bulk boxes of 1000 units. This aligns with the mechanical handling requirements of hermetic metal packages and distinguishes TN2219A_J05Z from surface-mount variants like TO-226AE tape-and-reel versions.

How does the noise figure of TN2219A_J05Z compare to other general-purpose NPN transistors?

The TN2219A_J05Z has a noise figure (NF) of 4.0 dB at I_C = 100 µA, V_CE = 10 V, R_S = 1.0 kΩ, f = 1.0 kHz, and BW = 1.0 kHz. This places it among the lower-noise options in the general-purpose NPN class-comparable to 2N2222A (NF ≈ 4–5 dB) but significantly quieter than high-speed switches like 2N3904 (NF ≈ 5–6 dB). For low-level signal amplification, this makes TN2219A_J05Z a validated choice within its operating current range.