onsemi MPSW92G

Overview

MPSW92G from onsemi is a PNP silicon high-voltage transistor rated for −300 V_CEO, −500 mA continuous collector current, and 1.0 W dissipation at T_A = 25°C, designed for high-voltage switching in flyback converters, relay drivers, and industrial control circuits.

For engineers reviewing the MPSW92G datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CEO/V_CBO = −300 V, h_FE ≥ 25 at I_C = −1.0 mA, f_T = 50 MHz, R_JA = 125 °C/W, and TO-92 Pb-free package compliance.

Technical Context

The MPSW92G operates as a medium-power PNP bipolar junction transistor with fixed emitter-base and collector-base junction structures optimized for high-voltage blocking and moderate-speed switching. Its DC current gain (h_FE) varies from 25 to 40 across I_C = −1–−30 mA at V_CE = −10 V, and saturation voltages are specified at −0.5 V (V_CE(sat)) and −0.9 V (V_BE(sat)) under I_C/I_B = 10.

Thermal performance is defined by R_JA = 125 °C/W and R_JC = 50 °C/W, supporting operation from −55°C to +150°C junction temperature. Small-signal behavior includes f_T = 50 MHz at I_C = −10 mA and C_cb = 6.0 pF at V_CB = −20 V, confirming suitability for <100 MHz switching applications.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-10), Pb-free, straight or bent lead options. Dimensions conform to JEDEC TO-226 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSW92 and 2N6519, the MPSW92G provides identical electrical performance with certified Pb-free packaging, superior thermal resistance (125 vs. 150 °C/W), and guaranteed f_T = 50 MHz - making it the preferred choice for new designs requiring regulatory compliance and higher-frequency stability.

Availability

MPSW92G is available at Aetrix Electronics and suitable for industrial relay drivers, flyback converter switches, high-voltage logic interfaces, and analog current sources requiring stable component supply and full RoHS compliance.

Supply support for MPSW92G 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, and cloud infrastructure markets.

The MPSW92G belongs to onsemi's legacy high-voltage bipolar transistor family, engineered specifically for robustness in industrial control, power conversion, and HV interface applications where reliability under sustained voltage stress is critical.

FAQ

What is the maximum collector-emitter voltage rating for the MPSW92G?

The MPSW92G has a guaranteed V_(BR)CEO of −300 Vdc at I_C = −1.0 mAdc and I_B = 0, confirmed in the official onsemi datasheet (Rev. 5, August 2010). This rating applies across the full operating temperature range and defines the absolute maximum blocking capability of the MPSW92G in common-emitter configurations.

Is the MPSW92G RoHS-compliant and what does the "G" suffix indicate?

Yes, the MPSW92G is RoHS-compliant. The "G" suffix explicitly denotes Pb-free packaging per onsemi's ordering nomenclature, as documented in the "Ordering Information" section of the MPSW92/D datasheet. The MPSW92G uses matte tin lead finish and meets JESD22-A113 moisture sensitivity level 1 requirements.

What is the DC current gain (h_FE) range for the MPSW92G at typical operating conditions?

The MPSW92G exhibits h_FE = 25 (minimum) at I_C = −1.0 mAdc and V_CE = −10 Vdc, rising to h_FE = 40 (minimum) at I_C = −10 mAdc under the same V_CE. These values are measured at T_A = 25°C and define the base drive design margin required to ensure saturation in the MPSW92G.

Can the MPSW92G be used in switching power supplies operating above 50 kHz?

Yes, the MPSW92G supports switching applications up to ~5 MHz due to its f_T = 50 MHz (measured at I_C = −10 mAdc, V_CE = −20 Vdc, f = 20 MHz). In practice, it is commonly deployed in flyback converters operating at 65–100 kHz, where its gain-bandwidth product ensures stable closed-loop control with the MPSW92G.

What is the thermal resistance from junction to ambient (R_JA) for the MPSW92G in a standard TO-92 footprint?

The MPSW92G has a specified R_JA of 125 °C/W when mounted on a standard FR-4 PCB with minimal copper area, per the "Thermal Characteristics" table in the onsemi MPSW92/D datasheet. This value assumes natural convection and defines the derating slope of 8.0 mW/°C above 25°C ambient for safe operation of the MPSW92G.