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

onsemi MPS2222

Name: MPS2222
Brand: onsemi
SKU: MPS2222
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPS2222

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPS2222.pdf

Description:: TRANS NPN 30V 0.6A TO92

Quantity:: RFQ Add To RFQ list

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Inventory:5,800

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Product details

Overview

MPS2222 from onsemi is an NPN silicon general-purpose transistor in TO-92 package, rated for 30 V_CEO, 600 mA continuous collector current, and 625 mW power dissipation at T_A = 25°C; used in low-voltage switching and amplification circuits such as relay drivers and signal buffering.

For engineers reviewing the MPS2222 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal behavior, switching timing (where specified), package dimensions, and direct alternatives - all confirmed for the exact MPS2222 variant, not the MPS2222A.

Technical Context

The MPS2222 operates as a medium-speed, low-power NPN bipolar junction transistor with DC current gain (h_FE) ranging from 35 to 300 depending on operating point, and f_T of 250 MHz at I_C = 20 mA, V_CE = 20 V. It exhibits V_CE(sat) ≤ 1.6 V at I_C = 150 mA / I_B = 15 mA and V_BE(sat) ≤ 2.6 V under same conditions.

Thermal resistance is R_θJA = 200°C/W (free-air) and R_θJC = 83.3°C/W (case), supporting operation from –55°C to +150°C junction temperature. Switching characteristics are documented only for MPS2222A; no official td/tr/ts/tf data is published for MPS2222.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum safe collector-emitter voltage before breakdown under open-base condition; defines upper rail limit in switching designs.
I_C Continuous	600 mA - Absolute maximum DC collector current; derating required above 25°C ambient per 5.0 mW/°C.
P_D @ T_A	625 mW - Max power dissipation at 25°C free-air; limits usable I_C×V_CE product without heatsinking.
h_FE Range	35–300 - DC current gain varies significantly with I_C; design must accommodate min/max spread across production lots.
f_T	250 MHz - Transition frequency at I_C = 20 mA, V_CE = 20 V; sets upper bound for small-signal amplification bandwidth.
R_θJA	200°C/W - Junction-to-ambient thermal resistance in standard TO-92 mounting; dictates temperature rise under load.

Pinout & Package

Package: TO-92 (Case 29–11), through-hole, epoxy-molded plastic with 3 leads. Standard lead form per Style 1: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path for majority carriers	Connected to circuit ground or low-impedance return; base-emitter junction forward-biased during conduction.
2 (Base)	Control terminal for carrier injection	Receives drive current to modulate collector current; requires current-limiting resistor in most switch applications.
3 (Collector)	Current entry path and output node	Connected to load and supply rail; carries full switched current and dissipates most power in saturation.

Key Features

Feature	Design Value
NPN silicon planar structure	Enables consistent gain and reliable switching in cost-sensitive consumer and industrial control circuits.
TO-92 package compatibility	Supports manual assembly and wave soldering; footprint matches industry-standard through-hole transistor layouts.
–55°C to +150°C operating range	Validated for use in automotive under-hood, industrial motor controls, and outdoor equipment without derating.
Low leakage (I_CBO ≤ 10 µA)	Minimizes standby current in battery-powered logic interfaces and sensor front-ends.

Applications

Relay Driver Circuit	DC Motor Speed Control
Use Scenario: Driving 12 V, 200 mA electromagnetic relay coil from microcontroller GPIO. IC Role / Device Role / Timing Role: NPN switch providing current gain to interface low-current logic with high-current inductive load. Use Value: V_CE(sat) ≤ 1.6 V ensures minimal power loss and coil voltage drop; h_FE ≥ 35 guarantees sufficient drive margin at 5 mA base current.	Use Scenario: PWM-based speed regulation of small brushed DC motors in portable tools. IC Role / Device Role / Timing Role: Low-side switching element controlled by MCU PWM output. Use Value: 600 mA I_C rating supports peak motor currents up to 400 mA; TO-92 thermal profile allows sustained 25% duty cycle at ambient 70°C.
LED Current Sink	Signal Level Shifting
Use Scenario: Constant-current sink for indicator LEDs in industrial panel displays. IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter resistor feedback. Use Value: h_FE stability over temperature enables ±5% LED brightness tolerance; 625 mW P_D permits 20 mA × 12 V operation with adequate margin.	Use Scenario: Translating 3.3 V logic signals to 5 V or 12 V domains in mixed-supply systems. IC Role / Device Role / Timing Role: Active pull-down stage in open-collector level-shifting configuration. Use Value: f_T = 250 MHz supports clean edge transitions up to ~10 MHz; low C_ibo = 30 pF minimizes capacitive loading on source driver.

Relay Driver Circuit

DC Motor Speed Control

Use Scenario: Driving 12 V, 200 mA electromagnetic relay coil from microcontroller GPIO.

IC Role / Device Role / Timing Role: NPN switch providing current gain to interface low-current logic with high-current inductive load.

Use Value: V_CE(sat) ≤ 1.6 V ensures minimal power loss and coil voltage drop; h_FE ≥ 35 guarantees sufficient drive margin at 5 mA base current.

Use Scenario: PWM-based speed regulation of small brushed DC motors in portable tools.

IC Role / Device Role / Timing Role: Low-side switching element controlled by MCU PWM output.

Use Value: 600 mA I_C rating supports peak motor currents up to 400 mA; TO-92 thermal profile allows sustained 25% duty cycle at ambient 70°C.

LED Current Sink

Signal Level Shifting

Use Scenario: Constant-current sink for indicator LEDs in industrial panel displays.

IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter resistor feedback.

Use Value: h_FE stability over temperature enables ±5% LED brightness tolerance; 625 mW P_D permits 20 mA × 12 V operation with adequate margin.

Use Scenario: Translating 3.3 V logic signals to 5 V or 12 V domains in mixed-supply systems.

IC Role / Device Role / Timing Role: Active pull-down stage in open-collector level-shifting configuration.

Use Value: f_T = 250 MHz supports clean edge transitions up to ~10 MHz; low C_ibo = 30 pF minimizes capacitive loading on source driver.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
PN2222A	V_CEO = 40 V, h_FE min = 100 at I_C = 150 mA, tighter gain distribution vs. MPS2222.	Preferred where higher voltage margin or guaranteed minimum gain at medium current is required.	Select PN2222A if design requires >30 V rail headroom or needs guaranteed h_FE ≥ 100 at 150 mA.
BC547B	V_CEO = 45 V, I_C = 100 mA, lower power rating (500 mW), different gain binning (h_FE = 200–450).	Suitable for low-power signal amplification but not for 600 mA switching loads.	Choose BC547B only for sub-100 mA analog or digital logic applications; not a functional replacement for MPS2222 in power switching.

Compared with PN2222A and BC547B, the MPS2222 offers the highest continuous collector current (600 mA) among these three, making it uniquely suitable for medium-power switching where both voltage headroom up to 30 V and current capability are simultaneously required - while maintaining TO-92 compatibility and cost efficiency.

Availability

MPS2222 is available at Aetrix Electronics and suitable for relay driving, LED current sinking, low-voltage motor control, and signal-level translation requiring stable component supply and long-term industrial availability.

Supply support for MPS2222 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 specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MPS2222 belongs to onsemi's legacy general-purpose bipolar transistor family, designed for cost-sensitive, high-volume applications demanding reliability, wide temperature operation, and proven manufacturability in TO-92 packaging.

FAQ

What is the maximum collector-emitter voltage rating for MPS2222?

The MPS2222 has a maximum collector-emitter voltage (V_CEO) rating of 30 Vdc at T_A = 25°C, as specified in the official onsemi datasheet. This rating applies under open-base conditions and must be derated for elevated temperatures or inductive load switching transients. Exceeding 30 V risks avalanche breakdown and permanent device failure.

Does MPS2222 support switching applications, and what are its key timing parameters?

The MPS2222 is qualified for general-purpose switching, but official switching timing data (td, tr, ts, tf) is published only for the MPS2222A variant - not for the MPS2222. Designers should rely on V_CE(sat) ≤ 1.6 V and f_T = 250 MHz to estimate performance; actual turn-on/off times depend heavily on external drive strength and load conditions.

What is the thermal resistance of MPS2222, and how does it affect PCB layout?

The MPS2222 has a junction-to-ambient thermal resistance (R_θJA) of 200°C/W in standard TO-92 mounting. To maintain T_J ≤ 150°C at 625 mW dissipation, ambient temperature must stay below 25°C - so PCB layout must include adequate copper area around the emitter pad and avoid heat-trapping enclosures. Derating is mandatory above 25°C ambient.

Is MPS2222 pin-compatible with MPS2222A, and can they be interchanged on the same PCB?

Yes, MPS2222 and MPS2222A share identical TO-92 package (Style 1), pinout (Emitter-Base-Collector), and mechanical dimensions - making them physically interchangeable on the same PCB. However, electrical differences exist: MPS2222A offers higher V_CEO (40 V), improved h_FE consistency, and documented switching specs, while MPS2222 remains valid where 30 V rating suffices.

What are the storage and operating temperature limits for MPS2222?

The MPS2222 is rated for junction and storage temperature from –55°C to +150°C, per onsemi's datasheet. This wide range supports deployment in harsh environments including automotive engine bays, industrial motor drives, and outdoor instrumentation - provided PCB layout and system-level thermal management keep actual junction temperature within bounds.

MPS2222 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 1.6V @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 10V

Power - Max:: 625 mW

Frequency - Transition:: 250MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

MPS2222 FAQ

1.How can I place an order for MPS2222 through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS2222 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 MPS2222 reliable?

The price and inventory of MPS2222 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS2222 is usually 5 days.

3.What payment methods are accepted for MPS2222?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS2222 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS2222?

MPS2222 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS2222 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 MPS2222?

For technical support, including MPS2222 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS2222 requirements.

6.How does Aetrix verify that MPS2222 is sourced from the original manufacturer or authorized distributors?

All MPS2222 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 MPS2222 meets industry standards.

7.What is the process for return or replacement of MPS2222?

All MPS2222 units undergo pre-shipment inspection (PSI). If there is an issue with MPS2222, 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 MPS2222 part is unused and in its original packaging.

Return procedure for MPS2222:

1.Submit a request within 90 days.

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

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