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 MPS4250

Name: MPS4250
Brand: onsemi
SKU: MPS4250
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPS4250

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: MPS4250.pdf

Description:: TRANSISTOR PNP GP SS 40V TO-92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:25,000

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

Product details

Overview

MPS4250 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, −50 mA I_C, 625 mW power dissipation at T_A = 25°C, h_FE ≥ 250 at I_C = −1.0 mA, and TO−92 package. It is commonly used in signal conditioning stages of sensor interfaces and discrete logic level translators.

For engineers reviewing the MPS4250 datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, −40 V breakdown rating, low saturation voltage (V_CE(sat) ≤ −0.25 V), thermal resistance (R_JA = 200 °C/W), and compatibility with through-hole PCB assembly workflows.

Technical Context

The MPS4250 operates as a medium-gain, low-current PNP BJT optimized for linear amplification and saturated switching in ambient-temperature-stable environments. Its h_FE remains ≥250 across I_C = −1.0 to −10 mA, and V_BE(sat) is specified at −0.9 V under I_C = −10 mA / I_B = −0.5 mA conditions.

Thermal performance is defined by R_JA = 200 °C/W (free-air) and R_JC = 83.3 °C/W (case-mounted), supporting operation from −55°C to +150°C junction temperature. Cutoff leakage is tightly controlled: I_CBO ≤ −10 nA at V_CB = −50 V and I_EBO ≤ −20 nA at V_EB = −3.0 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum safe collector-emitter reverse bias before breakdown in common-emitter configuration
I_C	−50 mA - Continuous DC collector current limit; defines maximum load drive capability in switching mode
P_D @ T_A = 25°C	625 mW - Total power dissipation limit with no heatsink; derates 5.0 mW/°C above 25°C ambient
h_FE	≥250 - DC current gain at I_C = −1.0 mA, V_CE = −5.0 V; ensures reliable base drive sizing for gain-critical stages
V_CE(sat)	≤ −0.25 V - Collector-emitter saturation voltage at I_C = −10 mA / I_B = −0.5 mA; minimizes conduction loss in switch applications
T_J Range	−55°C to +150°C - Validated operating junction temperature range; supports industrial and automotive under-hood ambient exposure

Pinout & Package

Package: TO−92 (Case 29−10), through-hole, 1 W rated, Pb−Free (MPS4250G variant). Standard straight-lead or bent-lead orientation per onsemi packaging specification BRD8011/D.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal for PNP device; connects to higher-potential rail in typical common-emitter switch configuration
2	Base	Control input; negative current injection turns device ON; requires current-limiting resistor in series with driving source
3	Collector	Current entry terminal; connects to load and supply return path; most negative node in circuit when active

Key Features

Feature	Design Value
Pb−Free construction	Complies with RoHS Directive 2011/65/EU; eliminates lead contamination risk in rework and end-of-life recycling
High h_FE consistency	Minimum h_FE = 250 at I_C = −1.0 mA ensures predictable base current requirements across production lots
Low V_CE(sat)	≤ −0.25 V enables <100 mW conduction loss at 40 mA load, critical for battery-powered signal switching
Controlled leakage	I_CBO ≤ −10 nA at −50 V supports stable biasing in high-impedance amplifier inputs over temperature

Applications

Industrial Sensor Signal Conditioning	Discrete Logic Level Translation
Use Scenario: Amplifying low-level output from thermistor or RTD bridges into ADC input range. IC Role / Device Role / Timing Role: PNP BJT configured as emitter-follower or common-emitter amplifier stage. Use Value: High h_FE ≥250 and low noise figure (NF ≤ 2.0 dB) preserve SNR in sub-mV signal paths.	Use Scenario: Converting 5 V TTL logic outputs to −5 V compatible levels for legacy analog comparators. IC Role / Device Role / Timing Role: Saturated PNP switch acting as active-low level shifter. Use Value: V_CE(sat) ≤ −0.25 V ensures minimal voltage drop and fast edge transitions (<100 ns propagation).
Linear Voltage Regulator Pass Element	LED Driver for Indicator Circuits
Use Scenario: Low-current pass transistor in adjustable 3-terminal regulator designs requiring <100 mA output. IC Role / Device Role / Timing Role: Series-pass element controlled by error amplifier feedback loop. Use Value: 625 mW power rating and R_JA = 200 °C/W allow stable operation without heatsink up to ~150 mW dissipation.	Use Scenario: Driving single-color indicator LEDs from microcontroller GPIO pins with inverted logic. IC Role / Device Role / Timing Role: Low-side PNP switch sinking current from LED anode to V_CC. Use Value: −50 mA I_C rating supports up to 20 mA LED current with 2.5× safety margin and thermal headroom.

Industrial Sensor Signal Conditioning

Discrete Logic Level Translation

Use Scenario: Amplifying low-level output from thermistor or RTD bridges into ADC input range.

IC Role / Device Role / Timing Role: PNP BJT configured as emitter-follower or common-emitter amplifier stage.

Use Value: High h_FE ≥250 and low noise figure (NF ≤ 2.0 dB) preserve SNR in sub-mV signal paths.

Use Scenario: Converting 5 V TTL logic outputs to −5 V compatible levels for legacy analog comparators.

IC Role / Device Role / Timing Role: Saturated PNP switch acting as active-low level shifter.

Use Value: V_CE(sat) ≤ −0.25 V ensures minimal voltage drop and fast edge transitions (<100 ns propagation).

Linear Voltage Regulator Pass Element

LED Driver for Indicator Circuits

Use Scenario: Low-current pass transistor in adjustable 3-terminal regulator designs requiring <100 mA output.

IC Role / Device Role / Timing Role: Series-pass element controlled by error amplifier feedback loop.

Use Value: 625 mW power rating and R_JA = 200 °C/W allow stable operation without heatsink up to ~150 mW dissipation.

Use Scenario: Driving single-color indicator LEDs from microcontroller GPIO pins with inverted logic.

IC Role / Device Role / Timing Role: Low-side PNP switch sinking current from LED anode to V_CC.

Use Value: −50 mA I_C rating supports up to 20 mA LED current with 2.5× safety margin and thermal headroom.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC557	V_CEO = −45 V, h_FE = 110–800 (wide spread), P_D = 500 mW	Higher max V_CEO but lower guaranteed h_FE min and reduced power handling	Preferred where higher breakdown margin is needed and gain variation is acceptable
PN2907A	V_CEO = −60 V, h_FE = 100–300, P_D = 400 mW, TO−92 package	Higher voltage rating but lower power dissipation and narrower h_FE range than MPS4250	Selected when >−40 V blocking is required and thermal budget allows lower P_D

Compared with BC557 and PN2907A, the MPS4250 provides tighter h_FE minimum (250 vs. 110/100), higher power rating (625 mW vs. 500/400 mW), and lower V_CE(sat) (−0.25 V vs. −0.3 to −0.4 V), making it preferable for precision gain-critical or higher-efficiency low-power switching.

Availability

MPS4250 is available at Aetrix Electronics and suitable for industrial sensor interfaces, discrete logic level translation, and LED indicator driver circuits requiring stable component supply and long-term manufacturing continuity.

Supply support for MPS4250 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 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 industrial and consumer equipment.

FAQ

What is the maximum collector-emitter voltage rating for the MPS4250?

The MPS4250 has a maximum collector-emitter voltage rating of −40 V (V_CEO). This value is verified under test condition I_C = −5.0 mA and applies to the common-emitter configuration. Exceeding this rating risks avalanche breakdown and permanent device damage, even for short-duration transients.

Does the MPS4250 have Pb−Free packaging?

Yes, the MPS4250G variant is explicitly designated as Pb−Free and complies with RoHS Directive 2011/65/EU. The "G" suffix indicates lead-free termination, and the device uses matte tin plating on leads. Standard marking includes "MPS4250" followed by date code and Pb−Free indicator per onsemi's generic marking diagram.

What is the typical DC current gain (h_FE) of the MPS4250 at low collector current?

The MPS4250 guarantees h_FE ≥ 250 at I_C = −1.0 mA and V_CE = −5.0 V. This minimum value is tested and binned during production, ensuring consistent base drive requirements in amplifier and switch bias networks without need for design margining beyond datasheet limits.

Can the MPS4250 be used in surface-mount designs?

No, the MPS4250 is only offered in the through-hole TO−92 (Case 29−10) package. It lacks SMT-compatible variants such as SOT−23 or SC−70. For surface-mount alternatives, engineers should evaluate functionally similar PNP transistors like the MMBT4403 or DXT4403, which require separate qualification for pinout, gain, and thermal behavior.

What is the thermal resistance from junction to ambient (R_JA) for the MPS4250 in free-air conditions?

The thermal resistance from junction to ambient (R_JA) for the MPS4250 is 200 °C/W under standard free-air mounting conditions per JEDEC JESD51−2. This value assumes no heatsink or board copper area enhancement and defines the worst-case temperature rise per watt of dissipated power at T_A = 25°C.

MPS4250 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: -

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

MPS4250 FAQ

1.How can I place an order for MPS4250 through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS4250 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 MPS4250 reliable?

The price and inventory of MPS4250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS4250 is usually 5 days.

3.What payment methods are accepted for MPS4250?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS4250 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS4250?

MPS4250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS4250 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 MPS4250?

For technical support, including MPS4250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS4250 requirements.

6.How does Aetrix verify that MPS4250 is sourced from the original manufacturer or authorized distributors?

All MPS4250 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 MPS4250 meets industry standards.

7.What is the process for return or replacement of MPS4250?

All MPS4250 units undergo pre-shipment inspection (PSI). If there is an issue with MPS4250, 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 MPS4250 part is unused and in its original packaging.

Return procedure for MPS4250:

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…