onsemi MPSA92RL1

Overview

MPSA92RL1 from onsemi is a PNP silicon high-voltage general-purpose transistor in TO-92 package, rated for −300 V_CEO, −300 V_CBO, −5 V_EBO, −500 mA continuous collector current, and 625 mW power dissipation at T_A = 25°C. It serves as a high-voltage switching or amplification element in off-line power supplies, relay drivers, and voltage multiplier circuits.

For engineers reviewing the MPSA92RL1 datasheet, pinout, applications, or equivalent options, key selection criteria include its −300 V breakdown rating, TO-92 leaded package compatibility with through-hole assembly, DC current gain (h_FE ≥ 25 at I_C = −1.0 mA), V_CE(sat) ≤ −0.5 V, and f_T = 50 MHz small-signal bandwidth.

Technical Context

The MPSA92RL1 operates as a discrete PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures optimized for high-voltage blocking. Its safe operating area (SOA) supports pulsed operation up to 1 A at reduced V_CE, and thermal resistance R_JA = 200°C/W defines ambient-limited power handling.

It features low leakage (I_CBO ≤ −0.25 µA at V_CB = −200 V), stable h_FE across −55°C to +150°C junction temperature, and C_cb = 6.0 pF at V_CB = −20 V, enabling predictable high-frequency behavior in snubber and oscillator designs.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11), through-hole, Pb-free, straight or bent lead options. Dimensions per onsemi specification: 4.45–5.20 mm height, 4.32–5.33 mm width, 3.18–4.19 mm thickness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage PNP transistor applications.

Compared with MPSA92G and BC639, the MPSA92RL1 provides identical high-voltage performance in tape-and-reel format for automated assembly, while BC639 offers no voltage rating overlap-making it unsuitable as a drop-in replacement in mains-connected circuits.

Availability

MPSA92RL1 is available at Aetrix Electronics and suitable for switched-mode power supplies, relay driver modules, voltage multiplier circuits, and high-voltage bias generators requiring stable component supply and consistent TO-92 leaded packaging.

Supply support for MPSA92RL1 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MPSA92RL1 belongs to onsemi's high-voltage discrete transistor product line, designed specifically for robust, cost-effective switching and amplification in off-line and high-reliability power systems.

FAQ

What is the maximum collector-emitter voltage rating for MPSA92RL1?

The MPSA92RL1 has a guaranteed minimum V_CEO rating of −300 Vdc at I_C = −1.0 mA and T_A = 25°C. This rating allows the MPSA92RL1 to operate reliably in circuits exposed to peak rectified 230 VAC mains (≈325 V) with safety margin. Derating applies at elevated temperatures per the datasheet's SOA curve.

Is MPSA92RL1 compatible with standard TO-92 PCB footprints?

Yes, the MPSA92RL1 uses the industry-standard TO-92 (Case 29-11) package with defined pin 1 (emitter), pin 2 (collector), and pin 3 (base) layout. Its mechanical dimensions-including 4.45–5.20 mm height and 4.32–5.33 mm width-match JEDEC TO-92 specifications, ensuring full footprint compatibility with legacy and new designs using this package outline.

Does MPSA92RL1 have Pb-free construction?

Yes, the MPSA92RL1 is manufactured with Pb-free terminations and complies with RoHS Directive 2011/65/EU. The "G" suffix in ordering codes (e.g., MPSA92RL1G) explicitly denotes Pb-free packaging, and the device meets onsemi's Pb-free soldering and mounting guidelines documented in SOLDERRM/D.

What is the typical DC current gain (h_FE) of MPSA92RL1 at low collector current?

The MPSA92RL1 exhibits h_FE ≥ 25 at I_C = −1.0 mA, V_CE = −10 Vdc, and T_A = 25°C. This gain value is confirmed in the official onsemi datasheet and ensures predictable base current requirements for switching applications. Gain varies with temperature and current-Figure 1 in the MPSA92/D datasheet shows h_FE curves across −55°C to +125°C.

Can MPSA92RL1 be used in linear amplifier configurations?

Yes, the MPSA92RL1 supports linear operation within its safe operating area (SOA), with specified V_CE(sat) and f_T = 50 MHz enabling audio-frequency amplification. However, its primary design focus is high-voltage switching; for precision analog gain, dedicated low-noise PNP transistors with tighter h_FE tolerance and lower noise figures are recommended instead of the MPSA92RL1.