onsemi MPSA92

Overview

MPSA92 from onsemi is a PNP silicon high-voltage general-purpose transistor rated for −300 V_CEO, −300 V_CBO, and −5.0 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, relay drivers, and voltage amplifier stages in industrial power supplies and legacy analog systems.

For engineers reviewing the MPSA92 datasheet, pinout, applications, or equivalent options, key selection criteria include verified −300 V breakdown ratings, TO-92 package thermal resistance (R_JA = 200°C/W), h_FE consistency across temperature, V_CE(sat) ≤ −0.5 V at −20 mA/−2 mA drive, and Pb-free compliance per onsemi's marking code MPSA92ZL1G.

Technical Context

The MPSA92 is a discrete PNP bipolar junction transistor optimized for high-voltage linear and switching operation. Its structure supports stable gain (h_FE = 25–100) from −55°C to +125°C and exhibits low C_cb = 6.0 pF at −20 V_CB, enabling use in moderate-frequency amplification up to 50 MHz f_T.

It features a TO-92 (Case 29-11) package with emitter-base-collector pinout (Pin 1 = E, Pin 2 = C, Pin 3 = B), thermal resistance R_JC = 83.3°C/W, and safe operating area validated to 10 ms at 1 A/100 V. The device is not intended for RF power or Class-D audio output stages due to saturation voltage and bandwidth limitations.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11), Pb-free, straight-lead ammo pack variant (MPSA92ZL1G). Dimensions per onsemi spec: 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 PNP high-voltage transistor applications.

Compared with BC639 and PN2907A, the MPSA92 provides unique −300 V robustness essential for mains-referenced industrial interfaces, while its consistent h_FE and low C_cb support both precision analog and fast-switching roles not covered by either alternative.

Availability

MPSA92 is available at Aetrix Electronics and suitable for industrial relay drivers, legacy CRT deflection circuits, high-voltage logic level shifters, and analog signal amplifiers requiring stable component supply and long-term obsolescence management.

Supply support for MPSA92 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MPSA92 belongs to onsemi's legacy high-voltage discrete transistor family, designed specifically for reliability-critical analog and switching applications where extended voltage headroom and wide temperature operation are mandatory.

FAQ

What is the maximum collector-emitter voltage rating for the MPSA92?

The MPSA92 has a guaranteed minimum V_CEO rating of −300 Vdc at I_C = −1.0 mAdc and I_B = 0, verified per onsemi's datasheet MPSA92/D Rev. 6. This rating applies to the MPSA92ZL1G variant and defines the absolute upper limit for collector-to-emitter potential before breakdown occurs. Designers must maintain appropriate safety margins and consider transient overvoltage conditions when using the MPSA92 in real-world circuits.

Is the MPSA92ZL1G RoHS-compliant and lead-free?

Yes, the MPSA92ZL1G is a Pb-free (lead-free) variant confirmed by onsemi's ordering information and package marking code. It meets RoHS Directive 2011/65/EU requirements and is supplied in ammo pack format with JEDEC-standard TO-92 packaging. The "G" suffix in the part number explicitly denotes Pb-free construction, and thermal and electrical specifications remain identical to non-Pb-free versions.

What is the pin configuration of the MPSA92 in the TO-92 package?

The MPSA92 uses standard TO-92 pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - with leads viewed from the flat side of the package, left-to-right. This configuration is documented in Figure 5 of the onsemi MPSA92/D datasheet and applies to all TO-92 variants including MPSA92ZL1G. Incorrect orientation may result in circuit failure or device damage due to reversed PNP polarity.

Can the MPSA92 be used as a direct replacement for the MPSA93?

No, the MPSA92 is not a direct replacement for the MPSA93. While both share the same TO-92 package and PNP topology, the MPSA93 has V_CEO = −200 V and V_CBO = −200 V - 100 V lower than the MPSA92's −300 V ratings. Substituting MPSA92 for MPSA93 is generally safe if voltage margins allow, but replacing MPSA93 with MPSA92 requires verification of h_FE and C_cb impact on circuit timing and gain.

What is the typical DC current gain (h_FE) of the MPSA92 at different collector currents?

The MPSA92 exhibits h_FE ≥25 at I_C = −1.0 mAdc, V_CE = −10 Vdc; ≥25 at I_C = −10 mAdc; and ≥25 at I_C = −30 mAdc per onsemi's Electrical Characteristics table. Gain increases with temperature and collector current, reaching ~100 at I_C = −100 mA and T_J = +125°C (Figure 1). Designers should reference the full h_FE vs. I_C curve for bias point optimization in the MPSA92 datasheet.