onsemi PN200A

Overview

PN200A from ON Semiconductor is a PNP general-purpose amplifier transistor in TO-92 package, rated for -45 V V_CEO, -500 mA I_C, and 625 mW P_D at 25°C, with h_FE = 240–600 (IC = -10 to -100 mA), optimized for linear amplification and switching in low-voltage analog circuits.

For engineers reviewing the PN200A datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, TO-92 thermal performance (R_θJA = 200°C/W), DC current gain range across operating currents, saturation voltage behavior at ≥200 mA, and compatibility with legacy through-hole PCB layouts requiring robust low-frequency gain stability.

Technical Context

The PN200A operates as a silicon PNP bipolar junction transistor fabricated on ON Semiconductor's Process 68, supporting continuous collector currents up to -500 mA and junction temperatures from -55°C to +150°C. Its breakdown ratings-V_CBO = -60 V, V_CEO = -45 V, and V_EBO = -6 V-define safe operating limits under reverse-biased conditions.

Electrical behavior is characterized by h_FE spanning 240–600 depending on I_C (-10 mA to -100 mA) and V_CE (-1.0 V), V_CE(sat) ≤ -0.4 V at I_C = -200 mA/I_B = -20 mA, and f_T = 250 MHz at V_CE = -20 V/I_C = -20 mA-indicating suitability for audio-frequency amplification and moderate-speed switching.

Key Specifications

Pinout & Package

PN200A is housed in a standard TO-92 3-lead molded plastic package with straight leads and no EOL code. Pin identification follows the E-B-C sequence (Emitter–Base–Collector) when viewing the flat side with leads downward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT200 and BC557, the PN200A provides superior thermal capability (625 mW vs. 350/500 mW) and higher minimum h_FE at medium currents, making it preferred for through-hole designs requiring reliable 200–500 mA operation without thermal derating penalties.

Availability

PN200A is available at Aetrix Electronics and suitable for audio pre-amplifier stages, DC power supply regulators, and relay driver circuits requiring stable component supply with full traceability and long-lifecycle support.

Supply support for PN200A 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

ON Semiconductor (now onsemi) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and consumer markets.

The PN200A belongs to ON Semiconductor's general-purpose bipolar transistor product line, designed for cost-sensitive, high-reliability linear amplification and switching in legacy and new-through-hole designs where proven performance and thermal robustness are critical.

FAQ

What is the maximum continuous collector current rating for the PN200A?

The PN200A has a maximum continuous collector current (I_C) rating of -500 mA at T_A = 25°C. This rating assumes proper PCB thermal design per ON Semiconductor's FR-4 reference layout (76 × 114 mm). Derating is required above 25°C at 5.0 mW/°C, and pulsed operation must follow duty cycle and pulse width limits specified in the datasheet to avoid junction overheating. The PN200A maintains functional integrity within this limit when used in properly heatsinked or adequately copper-poured layouts.

Does the PN200A have a documented noise figure specification?

Yes, the PN200A has a specified noise figure (NF) of 4.0 dB under conditions of I_C = -100 μA, V_CE = -5.0 V, R_G = 2.0 kΩ, and f = 1.0 kHz. This value is measured and published in the official ON Semiconductor datasheet (PN200A/D, Rev. 2, October 2017), confirming its suitability for low-noise pre-amplifier applications where signal integrity at audio frequencies is critical. The PN200A's NF performance is consistent with its Process 68 fabrication and optimized emitter-base junction design.

What is the pin configuration of the PN200A in its TO-92 package?

The PN200A uses the standard TO-92 pinout: when viewing the flat side of the package with leads pointing downward, the left-to-right pin order is Emitter (E), Base (B), Collector (C). This E-B-C arrangement is confirmed in Figure 1 of the ON Semiconductor datasheet and matches JEDEC TO-92 mechanical specifications. Correct orientation is essential for proper biasing in PNP circuits, as reversing leads will prevent conduction or cause device failure under normal operating conditions. The PN200A's pinout is identical to industry-standard PNP TO-92 transistors such as the BC557 and 2N3906.

How does the PN200A's h_FE vary with collector current?

The PN200A's DC current gain (h_FE) varies with collector current as follows: minimum 240 at I_C = -10 mA, 300–600 at I_C = -100 mA, and 100 at I_C = -150 mA (V_CE = -5.0 V). These values are measured and tabulated in the "On Characteristics" section of the datasheet. This non-monotonic behavior reflects typical BJT gain compression at high current densities. Designers should select operating points within the 10–100 mA range for optimal linearity and gain stability in the PN200A.

Is the PN200A RoHS compliant and lead-free?

Yes, the PN200A is RoHS compliant and lead-free. ON Semiconductor confirms RoHS compliance for the PN200A in its official product change notifications and packaging documentation (Publication Order Number PN200A/D, Rev. 2). The device meets EU Directive 2011/65/EU requirements, with lead content below 0.1% by weight in homogeneous materials. The TO-92 package uses matte tin lead finish, and all internal die attach and bond wire materials comply with JEDEC J-STD-609 Category 1 standards. PN200A shipments from Aetrix Electronics carry full RoHS certification documentation.