onsemi MPSA93G

Overview

MPSA93G from onsemi is a PNP silicon high-voltage general-purpose transistor in TO-92 package, rated for −200 V_CEO, −200 V_CBO, and −5 V_EBO, with continuous collector current of −500 mA and DC current gain (h_FE) ≥25 at −1.0 mA I_C. It operates across −55°C to +150°C and is used in high-voltage switching and linear amplification circuits such as CRT deflection, relay drivers, and HV power supply controls.

For engineers reviewing the MPSA93G datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CEO/V_CBO ratings, h_FE consistency across temperature, C_cb capacitance at 1 MHz, safe operating area (SOA) limits, and Pb-free TO-92 mechanical compatibility.

Technical Context

The MPSA93G is a discrete PNP bipolar junction transistor optimized for high-voltage switching and medium-current linear operation. Its −200 V_CEO and −200 V_CBO ratings enable use in circuits with elevated collector potentials, while its 83.3°C/W junction-to-case thermal resistance supports reliable power dissipation up to 1.5 W at T_C = 25°C.

It exhibits f_T = 50 MHz at I_C = −10 mA, V_CE = −20 V, indicating usable RF capability in low-frequency amplifier stages. Its C_cb = 8.0 pF at V_CB = −20 V enables predictable high-frequency response in tuned or broadband designs.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11), Pb-free, through-hole, straight or bent lead options. Dimensions per ON Semiconductor specification: A = 4.45–5.20 mm, B = 4.32–5.33 mm, C = 3.18–4.19 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA92G and BC639, the MPSA93G uniquely balances −200 V capability with proven thermal robustness and consistent h_FE across temperature-making it optimal for industrial HV switching where reliability trumps marginal voltage headroom or raw gain.

Availability

MPSA93G is available at Aetrix Electronics and suitable for CRT deflection circuits, industrial relay drivers, high-voltage power supply regulation, and analog signal amplification requiring stable component supply and long-term manufacturability.

Supply support for MPSA93G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MPSA92/MPSA93 family was designed specifically for high-voltage linear and switching applications in legacy and modern industrial electronics, emphasizing ruggedness, thermal stability, and Pb-free compliance in through-hole packages.

FAQ

What is the maximum collector-emitter voltage rating for the MPSA93G?

The MPSA93G has a maximum collector-emitter voltage (V_CEO) rating of −200 Vdc, verified per ON Semiconductor's official datasheet (Publication Order Number: MPSA92/D, Rev. 6). This rating applies under specified test conditions (I_C = −1.0 mAdc, I_B = 0) and defines the absolute upper limit for safe DC operation. Exceeding this voltage risks avalanche breakdown and permanent device failure. The MPSA93G must not be substituted in circuits requiring >−200 V blocking without redesign validation.

Does the MPSA93G have Pb-free packaging and RoHS compliance?

Yes, the MPSA93G is supplied in a Pb-free TO-92 package compliant with the EU RoHS Directive 2011/65/EU. ON Semiconductor explicitly marks "G" suffix variants (e.g., MPSA93G) as Pb-free in the Ordering Information table. Soldering profiles follow the ON Semiconductor Soldering and Mounting Techniques Reference Manual (SOLDERRM/D), supporting both wave and reflow processes without lead contamination risk.

What is the DC current gain (h_FE) of the MPSA93G at different collector currents?

The MPSA93G guarantees h_FE ≥25 at I_C = −1.0 mAdc, V_CE = −10 Vdc, and ≥25 at I_C = −30 mAdc, V_CE = −10 Vdc per the Electrical Characteristics table. At I_C = −10 mAdc, h_FE is also ≥25. These values are minimums measured at T_A = 25°C; actual gain varies with temperature and operating point, and design margin must account for −55°C to +125°C variation shown in Figure 1.

Can the MPSA93G replace the MPSA92G in a circuit?

The MPSA93G is not a drop-in replacement for the MPSA92G due to its lower −200 V_CEO/V_CBO rating versus −300 V for the MPSA92G. While both share identical TO-92 pinout and package dimensions, substituting MPSA93G in a −300 V design violates maximum ratings and risks catastrophic failure. Use MPSA93G only where circuit analysis confirms peak collector voltage remains ≤−200 V.

What is the thermal resistance junction-to-case (R_JC) for the MPSA93G?

The MPSA93G has a thermal resistance junction-to-case (R_JC) of 83.3°C/W, as specified in the Thermal Characteristics table of the official datasheet. This value enables calculation of junction temperature rise above case temperature (T_J = T_C + P_D × R_JC). For example, at 1.0 W dissipation and T_C = 60°C, T_J = 143.3°C - within the −55°C to +150°C operating range if properly heatsinked.