onsemi MPSL01

Overview

MPSL01 from Fairchild Semiconductor is an NPN general-purpose amplifier transistor designed for high-voltage amplification and gas discharge display driving. It features V_CEO = 120 V, I_C = 200 mA, h_FE = 50–300 at 10 mA, f_T = 60 MHz, and TO-92 package - enabling use in HV bias networks and segment drivers for neon/LED displays.

For engineers reviewing the MPSL01 datasheet, pinout, applications, or equivalent options, key selection criteria include its 120 V V_CEO, 60 MHz f_T, low V_CE(sat) (0.2 V @ 10 mA), thermal resistance of 200 °C/W, and compatibility with TO-92 footprint layouts in industrial display and signal conditioning circuits.

Technical Context

The MPSL01 is a silicon NPN bipolar junction transistor fabricated using Fairchild's Process 16, optimized for stable DC gain and high-voltage operation. Its breakdown ratings (V_CEO = 120 V, V_CBO = 140 V) and low leakage (I_CBO ≤ 1.0 µA) support reliable performance in open-collector switching and linear amplification up to 120 V collector swing.

With f_T = 60 MHz and h_fe = 30 at 1 mA/10 V, it supports medium-frequency small-signal amplification while maintaining robust saturation behavior (V_CE(sat) = 0.2 V @ I_C/I_B = 10 mA/1 mA). Its TO-92 thermal profile (R_θJA = 200 °C/W) suits ambient-temperature-stable discrete gain stages.

Key Specifications

Pinout & Package

Package: TO-92 (standard straight-lead, no lead clip, 2000 units per box). Pin identification follows JEDEC TO-92 outline: flat side facing viewer, leads down, left-to-right = Emitter (E), Base (B), Collector (C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN amplifier applications.

Compared with 2N5551 and BC547B, the MPSL01 uniquely balances 120 V breakdown, 200 mA current, and 60 MHz bandwidth in a standard TO-92 - making it optimal for cost-constrained, medium-speed, high-voltage discrete amplifier and driver roles where full 100 MHz f_T is unnecessary.

Availability

MPSL01 is available at Aetrix Electronics and suitable for neon display driving, industrial relay interfaces, and high-voltage bias amplification requiring stable component supply and long-term obsolescence management.

Supply support for MPSL01 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The MPSL01 belongs to Fairchild's general-purpose bipolar transistor family, engineered for reliability in high-voltage industrial and display applications where robustness and standardized packaging are essential.

FAQ

What is the maximum collector-emitter voltage rating for the MPSL01?

The MPSL01 has a maximum collector-emitter voltage (V_CEO) rating of 120 V at T_A = 25°C. This rating is based on a maximum junction temperature of 150°C and applies under continuous DC conditions. Exceeding this voltage risks irreversible breakdown, especially under pulsed or elevated-temperature operation - always consult Fairchild's original datasheet for derating curves and transient limits specific to the MPSL01.

Is the MPSL01 pin-compatible with the 2N5551?

Yes, the MPSL01 is pin-compatible with the 2N5551 in TO-92 packages: both follow the E-B-C pinout (flat side facing viewer, leads down). However, the MPSL01 datasheet explicitly references the 2N5551 for characteristics, confirming shared mechanical and electrical interface compatibility - though h_FE and f_T differ slightly. No PCB layout change is needed for substitution in most linear or switching designs.

What is the typical DC current gain (h_FE) of the MPSL01 at 10 mA collector current?

The MPSL01 exhibits a DC current gain (h_FE) ranging from 50 to 300 when measured at V_CE = 5.0 V and I_C = 10 mA. This wide gain spread reflects standard bipolar process variation and must be accounted for in bias network design - e.g., using emitter degeneration resistors to stabilize operating point. The MPSL01's gain specification is verified per Fairchild's published electrical characteristics table.

Can the MPSL01 be used in switching applications?

Yes, the MPSL01 is suitable for switching applications, particularly where high-voltage capability is required. Its V_CE(sat) = 0.2 V at I_C/I_B = 10 mA/1 mA and I_C(max) = 200 mA support efficient on-state operation in relay drivers and display segment switches. For faster switching, consider its f_T = 60 MHz and C_ob = 8.0 pF - but avoid exceeding 120 V or 625 mW dissipation in the MPSL01.

What is the thermal resistance from junction to ambient (R_θJA) for the MPSL01 in TO-92 package?

The MPSL01 has a junction-to-ambient thermal resistance (R_θJA) of 200 °C/W when mounted in free air on a standard TO-92 test board per JEDEC JESD51-2. This value assumes no heatsinking and defines the temperature rise above ambient per watt of dissipated power. At its rated 625 mW, junction temperature can rise up to 125°C above ambient - so operation near maximum ratings requires careful thermal design and derating above 25°C per the 5.0 mW/°C spec.