onsemi MPSA92RLRA

Overview

MPSA92RLRA 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 25°C ambient. It serves as a high-voltage switching or linear amplification device in off-line power supplies, relay drivers, and HV signal conditioning circuits.

For engineers reviewing the MPSA92RLRA datasheet, pinout, applications, or equivalent options, key selection criteria include verified −300 V breakdown ratings, DC current gain (h_FE) of 25–40 at −1.0 mA, V_CE(sat) ≤ −0.5 V at −20 mA/−2 mA drive, f_T ≥ 50 MHz, and TO-92 mechanical compatibility with legacy through-hole layouts.

Technical Context

The MPSA92RLRA operates as a discrete PNP bipolar junction transistor optimized for high-voltage switching where robust reverse-biased junction integrity is required. Its −300 V_CEO and −300 V_CBO ratings enable direct use in 240 VAC line-referenced circuits without cascading or snubbing.

It delivers h_FE ≥ 25 at −1.0 mA and −10 V_CE, supports f_T ≥ 50 MHz under −10 mA/−20 V conditions, and exhibits C_cb = 6.0 pF at −20 V_CB, making it suitable for medium-speed switching up to several MHz with predictable turn-off behavior.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11), straight-lead tape-and-reel variant (MPSA92RLRA). Lead form conforms to standard JEDEC TO-226AA outline with bent or straight options; this part uses straight leads per ordering information.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA92RLRA, MPSA92RLRAG offers identical performance with environmental compliance, while 2N6027 requires layout changes and sacrifices 150 V of voltage headroom-making MPSA92RLRA the preferred choice for new designs and legacy replacements demanding full spec continuity.

Availability

MPSA92RLRA is available at Aetrix Electronics and suitable for industrial relay drivers, off-line AC-DC power supplies, high-voltage signal level shifting, and legacy equipment repair requiring stable component supply and long-term obsolescence mitigation.

Supply support for MPSA92RLRA 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 MPSA92RLRA belongs to onsemi's legacy high-voltage discrete transistor product line, designed specifically for reliability-critical, cost-sensitive through-hole applications where voltage robustness and mechanical interchangeability are primary design constraints.

FAQ

What is the maximum collector-emitter voltage rating for MPSA92RLRA?

The MPSA92RLRA has a guaranteed minimum V_CEO rating of −300 Vdc, tested under I_C = −1.0 mAdc and I_B = 0 conditions. This rating is validated per onsemi's published datasheet (Publication Order Number: MPSA92/D, Rev. 6) and applies across the full operating temperature range of −55°C to +150°C. Designers may use this value directly for worst-case stress analysis in high-voltage switching nodes.

Is MPSA92RLRA pin-compatible with MPSA92G or MPSA92RL1G?

Yes, MPSA92RLRA shares identical TO-92 package dimensions, pinout (Emitter–Collector–Base), and electrical specifications with MPSA92G and MPSA92RL1G. The only differences are packaging format (tape-and-reel vs bulk/box) and Pb-free status-MPSA92RLRA is leaded, while MPSA92G and MPSA92RL1G are Pb-free. No PCB layout change is needed when substituting MPSA92RLRA into designs originally specifying those variants.

What is the typical DC current gain (h_FE) of MPSA92RLRA at low collector current?

The MPSA92RLRA exhibits h_FE ≥ 25 at I_C = −1.0 mAdc and V_CE = −10 Vdc, per the official onsemi datasheet. At I_C = −10 mAdc, h_FE remains ≥ 25, and at I_C = −30 mAdc, it drops to ≥ 25 for MPSA92 variants. This gain stability supports predictable base-resistor sizing in low-power switching applications without gain-dependent timing drift.

Does MPSA92RLRA support high-frequency switching applications?

Yes, the MPSA92RLRA has a specified f_T ≥ 50 MHz at I_C = −10 mAdc, V_CE = −20 Vdc, and f = 100 MHz. This bandwidth supports clean switching in PWM-based circuits up to ~5 MHz, provided layout minimizes parasitic inductance and base drive is adequately sized. Its 6.0 pF C_cb further limits Miller-induced delays in common-emitter configurations.

What is the thermal resistance junction-to-ambient for MPSA92RLRA in free-air conditions?

The MPSA92RLRA has a maximum R_JA of 200°C/W when mounted on a standard FR-4 PCB with no heatsink, per the onsemi datasheet. This value assumes natural convection cooling and defines the worst-case temperature rise per milliwatt of dissipated power. For sustained operation near its 625 mW P_D limit, forced airflow or thermal relief traces are recommended to maintain T_J below 150°C.