Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi MPS4250ARLRM

Name: MPS4250ARLRM
Brand: onsemi
SKU: MPS4250ARLRM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPS4250ARLRM

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: MPS4250ARLRM.pdf

Description:: TRANS PNP 40V 0.05A TO92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,068

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MPS4250ARLRM from onsemi is a PNP silicon bipolar junction transistor (BJT) designed for general-purpose amplification and switching in low-power analog and digital circuits. It features −40 V V_CEO, 625 mW power dissipation at T_A = 25°C, h_FE ≥ 250 at I_C = −1.0 mA, V_CE(sat) ≤ −0.25 V, and TO-92 package. It is commonly used in discrete amplifier stages, level shifters, and low-current driver circuits.

For engineers reviewing the MPS4250ARLRM datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, −40 V breakdown rating, DC current gain consistency across I_C = −1–−10 mA, saturation voltage under defined drive conditions, and thermal resistance (R_JA = 200°C/W) for ambient-limited designs.

Technical Context

The MPS4250ARLRM operates as a medium-gain, low-voltage PNP BJT optimized for linear amplification and saturated switching. Its h_FE remains stable between 250–800 depending on bias (I_C = −0.5 to −1.0 mA), and small-signal h_fe extends to 20 MHz, supporting audio-frequency and low-speed digital applications.

It exhibits low output capacitance (C_obo ≤ 6.0 pF) and input capacitance (C_ibo ≤ 16 pF), enabling fast turn-off and minimal Miller effect in switching configurations. Noise figure is specified at 2.0 dB under two distinct test conditions, confirming suitability for low-noise preamplifier use in sensor interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum safe collector-emitter voltage before breakdown; defines upper rail limit in PNP switch or amplifier stage.
h_FE	≥250 @ I_C = −1.0 mA - Ensures reliable current amplification with modest base drive in linear operation.
V_CE(sat)	≤ −0.25 V @ I_C = −10 mA, I_B = −0.5 mA - Enables low conduction loss in saturated switching applications.
P_D (T_A)	625 mW @ 25°C - Sets maximum continuous power handling without heatsinking in still-air environments.
R_JA	200°C/W - Indicates thermal sensitivity; requires derating by 5.0 mW/°C above 25°C ambient for safe operation.
C_obo	≤6.0 pF @ V_CB = −5 V - Limits high-frequency feedback and supports stable gain up to ~20 MHz.

Pinout & Package

Package: TO-92 (Case 29-11, Style 1), through-hole, Pb-free compliant. Standard lead configuration with Emitter (Pin 1), Base (Pin 2), Collector (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP device	Connected to most positive supply node in common-emitter or common-base configurations.
2 (Base)	Control electrode for minority-carrier injection	Receives reverse-biased current to regulate collector current; requires current-limiting resistor in most designs.
3 (Collector)	Current sink terminal	Typically tied to load and ground reference; voltage swing limited by V_CEO = −40 V rating.

Key Features

Feature	Design Value
High DC current gain	h_FE ≥ 250 ensures robust amplification with low base drive current, reducing loading on preceding stages.
Low saturation voltage	V_CE(sat) ≤ −0.25 V minimizes power loss and heat generation when used as a saturated switch.
Low noise performance	NF = 2.0 dB at I_C = −20 µA enables use in sensitive preamplifier front-ends for sensors and audio signals.
Stable high-frequency response	h_fe = 800 @ f = 20 MHz supports wideband amplification up to audio and low-RF frequencies.

Applications

Audio Preamp Stage	Discrete Level Shifter
Use Scenario: Amplifying low-level microphone or piezoelectric sensor outputs prior to ADC sampling. IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide voltage gain and impedance transformation. Use Value: High h_FE and low NF = 2.0 dB ensure signal integrity and SNR preservation at microamp-level input currents.	Use Scenario: Translating logic levels between +5 V and +12 V domains in legacy industrial control interfaces. IC Role / Device Role / Timing Role: PNP switch operating in saturation/cutoff to invert and shift TTL-compatible signals. Use Value: V_CE(sat) ≤ −0.25 V and fast C_ibo/C_obo enable clean transitions with <100 ns propagation delay.
LED Driver (Low-Side)	Current Mirror Reference
Use Scenario: Driving indicator LEDs from microcontroller GPIO pins with current limiting via base resistor. IC Role / Device Role / Timing Role: Saturated PNP switch sourcing current to LED anode while emitter connects to V_CC. Use Value: Guaranteed h_FE ≥ 250 allows precise current setting with minimal base current overhead.	Use Scenario: Building matched current sources in analog IC test fixtures or discrete op-amp bias networks. IC Role / Device Role / Timing Role: One leg of a two-transistor mirror where identical process and packaging minimize V_BE mismatch. Use Value: Tight V_(BR)EBO = −5.0 V and consistent h_FE support stable mirroring accuracy within ±5% over temperature.

Audio Preamp Stage

Discrete Level Shifter

Use Scenario: Amplifying low-level microphone or piezoelectric sensor outputs prior to ADC sampling.

IC Role / Device Role / Timing Role: PNP BJT configured in common-emitter topology to provide voltage gain and impedance transformation.

Use Value: High h_FE and low NF = 2.0 dB ensure signal integrity and SNR preservation at microamp-level input currents.

Use Scenario: Translating logic levels between +5 V and +12 V domains in legacy industrial control interfaces.

IC Role / Device Role / Timing Role: PNP switch operating in saturation/cutoff to invert and shift TTL-compatible signals.

Use Value: V_CE(sat) ≤ −0.25 V and fast C_ibo/C_obo enable clean transitions with <100 ns propagation delay.

LED Driver (Low-Side)

Current Mirror Reference

Use Scenario: Driving indicator LEDs from microcontroller GPIO pins with current limiting via base resistor.

IC Role / Device Role / Timing Role: Saturated PNP switch sourcing current to LED anode while emitter connects to V_CC.

Use Value: Guaranteed h_FE ≥ 250 allows precise current setting with minimal base current overhead.

Use Scenario: Building matched current sources in analog IC test fixtures or discrete op-amp bias networks.

IC Role / Device Role / Timing Role: One leg of a two-transistor mirror where identical process and packaging minimize V_BE mismatch.

Use Value: Tight V_(BR)EBO = −5.0 V and consistent h_FE support stable mirroring accuracy within ±5% over temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP BJT amplification and switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPSA92	Higher V_CEO = −300 V; lower h_FE (min 50); larger R_JA = 270°C/W	Better suited for high-voltage switching (e.g., relay drivers), less optimal for low-noise preamps	Select MPSA92 only when >−40 V breakdown is required; MPS4250ARLRM preferred for gain/noise-critical roles.
BC557B	Same V_CEO = −45 V; h_FE = 200–450; slightly higher V_CE(sat) = −0.3 V; TO-92 compatible	Functionally interchangeable in most linear and switching roles, but marginally noisier (NF ≈ 3.5 dB)	BC557B is a direct-fit alternative with minor trade-offs in saturation loss and noise; verify layout compatibility.

Compared with MPSA92 and BC557B, the MPS4250ARLRM delivers superior DC gain stability and lower noise-critical for precision analog front-ends-while maintaining identical TO-92 footprint and −40 V rating, making it the preferred choice for gain-sensitive, low-power PNP applications.

Availability

MPS4250ARLRM is available at Aetrix Electronics and suitable for audio preamplifiers, discrete level shifters, LED drivers, and current mirror references requiring stable component supply and Pb-free compliance.

Supply support for MPS4250ARLRM 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MPS4250 series belongs to onsemi's general-purpose bipolar transistor product line, engineered for reliability and consistency in discrete analog signal conditioning and low-power switching across commercial and industrial temperature ranges.

FAQ

What is the maximum collector-emitter voltage rating for the MPS4250ARLRM?

The MPS4250ARLRM has a guaranteed minimum V_(BR)CEO of −40 V at I_C = −5.0 mA. This rating applies under DC and pulsed conditions per the datasheet's "Maximum Ratings" table and must not be exceeded to avoid device breakdown. The same −40 V value is specified for V_(BR)CES and V_(BR)CBO, confirming symmetrical voltage tolerance across all major junctions in the MPS4250ARLRM.

Is the MPS4250ARLRM RoHS-compliant and Pb-free?

Yes, the MPS4250ARLRM is a Pb-free device, as confirmed by the "Pb−Free Package" designation in the ordering information and the "*For additional information on our Pb−Free strategy…" footnote in the datasheet. It meets RoHS Directive 2011/65/EU requirements and is supplied in tape-and-ammo packaging with full material declaration traceability for the MPS4250ARLRM.

What is the typical DC current gain (h_FE) of the MPS4250ARLRM at different operating points?

The MPS4250ARLRM specifies h_FE ≥ 250 at both I_C = −1.0 mA and I_C = −10 mA (V_CE = −5.0 V, T_A = 25°C). At lighter bias (I_C = −0.5 mA), small-signal h_fe reaches up to 800 at 20 MHz, indicating strong gain retention into higher frequencies. These values are measured and guaranteed per the "Electrical Characteristics" table in the official MPS4250/D datasheet for the MPS4250ARLRM.

Can the MPS4250ARLRM be used in low-noise amplifier designs?

Yes-the MPS4250ARLRM is characterized with NF = 2.0 dB under two standard conditions (I_C = −20 µA and −250 µA), confirming its suitability for low-noise preamplifier stages. Its low C_ibo (≤16 pF) and high h_FE further support high-input-impedance, low-distortion configurations. Designers should operate the MPS4250ARLRM within its recommended I_C range and maintain stable V_CE to preserve this noise performance.

What is the thermal resistance (R_JA) of the MPS4250ARLRM in free-air conditions?

The MPS4250ARLRM has a maximum R_JA of 200°C/W when mounted on a standard PCB with no heatsink and operated in still air. This value is specified in the "Thermal Characteristics" table and governs derating: power dissipation must decrease by 5.0 mW for every 1°C rise above 25°C ambient. R_JC is 83.3°C/W, indicating efficient die-to-case conduction for potential heatsink use in the MPS4250ARLRM.

MPS4250ARLRM Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 50 mA

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 500µA, 10mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 10mA, 5V

Power - Max:: 625 mW

Frequency - Transition:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

MPS4250ARLRM FAQ

1.How can I place an order for MPS4250ARLRM through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS4250ARLRM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MPS4250ARLRM reliable?

The price and inventory of MPS4250ARLRM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS4250ARLRM is usually 5 days.

3.What payment methods are accepted for MPS4250ARLRM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS4250ARLRM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS4250ARLRM?

MPS4250ARLRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS4250ARLRM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MPS4250ARLRM?

For technical support, including MPS4250ARLRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS4250ARLRM requirements.

6.How does Aetrix verify that MPS4250ARLRM is sourced from the original manufacturer or authorized distributors?

All MPS4250ARLRM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPS4250ARLRM meets industry standards.

7.What is the process for return or replacement of MPS4250ARLRM?

All MPS4250ARLRM units undergo pre-shipment inspection (PSI). If there is an issue with MPS4250ARLRM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MPS4250ARLRM part is unused and in its original packaging.

Return procedure for MPS4250ARLRM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…