onsemi MPS4250ARLRMG

Overview

MPS4250ARLRMG from onsemi is a PNP silicon general-purpose amplifier transistor in TO-92 package, rated for −40 V V_CEO, −40 V V_CBO, −5.0 V V_EBO, 625 mW P_D at T_A = 25°C, and h_FE ≥ 250 at I_C = −1.0 mA, used in low-power linear amplification and switching circuits in consumer audio and signal conditioning stages.

For engineers reviewing the MPS4250ARLRMG datasheet, pinout, applications, or equivalent options, key selection criteria include its −40 V breakdown ratings, 250 minimum DC current gain, TO-92 Pb-free packaging, V_CE(sat) ≤ −0.25 V at −10 mA/−0.5 mA drive, and thermal resistance R_JA = 200°C/W for ambient-limited bias design.

Technical Context

This discrete PNP bipolar junction transistor operates in active, saturation, and cutoff regions with verified V_(BR)CEO(sus) = −40 V and V_BE(sat) = −0.9 V at I_C = −10 mA, supporting stable DC biasing in Class-A amplifiers and low-side switch configurations.

Its small-signal parameters include h_fe = 250–800 (1 kHz–20 MHz), C_ibo = 16 pF, and NF = 2.0 dB at I_C = −20 µA, confirming suitability for audio-frequency amplification where low noise and moderate bandwidth are required.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11, Style 1), Pb-free, through-hole mounting with standard lead spacing of 2.54 mm (0.100 inch).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Compared with BC557B and PN2907A, the MPS4250ARLRMG offers superior h_FE consistency at low I_C and lower noise figure-making it optimal for precision analog gain stages where signal integrity outweighs absolute voltage headroom.

Availability

MPS4250ARLRMG is available at Aetrix Electronics and suitable for audio preamplifiers, low-side switch drivers, DC bias reference circuits, and signal level shifters requiring stable component supply and RoHS-compliant TO-92 transistors.

Supply support for MPS4250ARLRMG 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 MPS4250 series belongs to onsemi's general-purpose bipolar transistor product line, designed for cost-sensitive, low-power linear amplification and switching in consumer electronics and industrial controls.

FAQ

What is the maximum collector-emitter voltage rating for MPS4250ARLRMG?

The MPS4250ARLRMG has a maximum collector-emitter voltage rating of −40 V (V_CEO) under open-base conditions at T_A = 25°C. This rating is confirmed in the "Maximum Ratings" table of the official onsemi datasheet (MPS4250/D, Rev. 2), and applies to both DC and pulsed operation within specified thermal limits. Exceeding this voltage risks irreversible breakdown of the MPS4250ARLRMG junction.

Is MPS4250ARLRMG RoHS-compliant and what does the 'G' suffix indicate?

Yes, MPS4250ARLRMG is RoHS-compliant. The 'G' suffix explicitly denotes a Pb-free (lead-free) TO-92 package, as stated in the "Ordering Information" section of the onsemi datasheet. This version uses matte tin lead plating and meets JEDEC J-STD-020 moisture sensitivity level 1 requirements, making MPS4250ARLRMG suitable for lead-free reflow assembly.

What is the DC current gain (h_FE) range for MPS4250ARLRMG at typical operating conditions?

The MPS4250ARLRMG guarantees a minimum h_FE of 250 at I_C = −1.0 mA and V_CE = −5.0 V, with no upper limit specified. At I_C = −10 mA and V_CE = −5.0 V, the same minimum h_FE of 250 applies. These values are measured and documented in the "Electrical Characteristics" table of the official MPS4250/D datasheet, ensuring predictable gain behavior in MPS4250ARLRMG-based amplifier designs.

Can MPS4250ARLRMG be used in audio-frequency amplification stages?

Yes, MPS4250ARLRMG is suitable for audio-frequency amplification due to its 2.0 dB noise figure at I_C = −20 µA and f = 1 kHz, combined with h_fe = 250–800 across 1 kHz–20 MHz. Its low C_ibo = 16 pF and stable h_FE support clean gain in preamp and driver stages. These characteristics are validated in the "Small-Signal Characteristics" section of the MPS4250/D datasheet, confirming MPS4250ARLRMG's utility in audio signal paths.

What is the thermal resistance from junction-to-ambient (R_JA) for MPS4250ARLRMG?

The thermal resistance from junction-to-ambient (R_JA) for MPS4250ARLRMG is 200°C/W, as specified in the "Thermal Characteristics" table of the onsemi MPS4250/D datasheet. This value assumes standard PCB mounting in still air and directly determines the temperature rise above ambient per milliwatt of dissipated power-critical for thermal design of MPS4250ARLRMG in unheatsinked TO-92 layouts.