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

onsemi MPSW01

Name: MPSW01
Brand: onsemi
SKU: MPSW01
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSW01

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPSW01.pdf

Description:: TRANS NPN 30V 1A TO92

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

MPSW01 from Fairchild Semiconductor is an NPN general-purpose amplifier transistor rated for 30 V V_CEO, 1.0 A continuous collector current, and 1.0 W total power dissipation at 25°C, designed for medium-power linear amplification in industrial control and signal conditioning circuits.

For engineers reviewing the MPSW01 datasheet, pinout, applications, or equivalent options, key selection considerations include its 50 MHz f_T, 55–60 h_FE at 10 mA, V_CE(sat) ≤ 0.5 V at 1.0 A/100 mA drive, thermal resistance R_θJA = 125°C/W on FR-4, and suitability for Class-A/B audio and DC motor driver stages.

Technical Context

The MPSW01 operates as a silicon NPN bipolar junction transistor with a maximum junction temperature of 150°C and specified steady-state absolute ratings. Its electrical behavior is defined under DC bias conditions including V_CE = 1.0 V and IC up to 1.0 A, with gain (h_FE) varying across current levels-55 min at 10 mA, 60 min at 100 mA, and 50 min at 1.0 A.

Small-signal performance includes f_T = 50 MHz at IC = 50 mA, V_CE = 10 V, and 20 MHz test frequency, alongside C_cb = 20 pF at V_CB = 10 V. Off-state leakage is tightly controlled: ICBO ≤ 0.1 µA at V_CB = 30 V and IEBO ≤ 0.1 µA at V_EB = 3.0 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - Maximum safe collector-emitter voltage before breakdown under open-base condition
I_C (continuous)	1.0 A - Continuous DC collector current capability without thermal derating at 25°C
P_D	1.0 W - Total power dissipation limit on FR-4 PCB with specified mounting pad area
h_FE	55–60 - DC current gain range at low-to-moderate collector currents (10–100 mA), enabling predictable bias design
f_T	50 MHz - Unity-gain frequency indicating usable bandwidth for RF and wideband amplification
V_CE(sat)	≤ 0.5 V - Low saturation voltage at I_C = 1.0 A / I_B = 100 mA, minimizing conduction loss in switching applications
R_θJA	125°C/W - Junction-to-ambient thermal resistance on standard FR-4 board, defining required heatsinking margin

Pinout & Package

Package: TO-92 (Plastic, 3-lead, through-hole). Standard JEDEC TO-92 outline with emitter-collector-base pin configuration verified per Fairchild MPSW01 Rev. A datasheet Figure 1.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal for NPN operation	Connected to ground or low-side reference; determines current path direction and bias polarity
Collector (C)	Current source terminal for NPN operation	Drives load toward positive supply; requires voltage headroom ≥ V_CEO = 30 V
Base (B)	Control input for minority-carrier injection	Receives forward-biased current (I_B ≈ I_C/h_FE) to enable amplification or saturation

Key Features

Feature	Design Value
Medium-power amplification capability	Supports 1.0 A I_C and 1.0 W P_D, enabling use in driver stages for relays, solenoids, and small motors
Stable DC current gain across operating range	h_FE ≥ 50 at 1.0 A ensures reliable active-mode biasing in high-current linear amplifiers
Low V_CE(sat) at full load	0.5 V saturation voltage reduces power loss and self-heating during switching or saturated-region operation
Controlled leakage performance	ICBO ≤ 0.1 µA at 30 V supports stable operation in high-impedance bias networks and low-power standby circuits
Thermally characterized mounting	R_θJA = 125°C/W defined on standardized FR-4 layout (36 mm × 18 mm × 1.5 mm), enabling repeatable thermal simulation

Applications

Audio Pre-amplifier Stage	DC Motor Driver (Small)
Use Scenario: Amplifying line-level analog signals prior to power amplification in portable audio equipment. IC Role / Device Role / Timing Role: NPN transconductance amplifier operating in Class-A or Class-AB mode with fixed emitter degeneration. Use Value: 50 MHz f_T and 55–60 h_FE ensure flat frequency response up to 20 kHz and low distortion at 10–100 mA collector bias.	Use Scenario: Driving brushed DC motors rated ≤ 24 V, 500 mA in industrial actuators and lab instrumentation. IC Role / Device Role / Timing Role: Single-ended switch or linear current regulator controlling motor winding current via base-driven saturation. Use Value: V_CEO = 30 V provides 6 V margin above 24 V rail; V_CE(sat) ≤ 0.5 V limits resistive loss to < 250 mW at 500 mA.
Relay Driver Circuit	Signal-Level Voltage Shifter
Use Scenario: Interfacing microcontroller GPIO outputs to 5–12 V relay coils requiring 20–100 mA hold current. IC Role / Device Role / Timing Role: Low-side switch turning relay coil on/off using saturated NPN operation with base resistor biasing. Use Value: I_C = 1.0 A rating accommodates relay inrush current spikes; h_FE ≥ 55 ensures reliable turn-on with ≤ 2 mA MCU drive.	Use Scenario: Translating 3.3 V logic signals to 5 V or 12 V levels for legacy peripheral interfacing. IC Role / Device Role / Timing Role: Emitter-follower or common-emitter level translator with defined output swing and current sourcing capability. Use Value: V_EBO = 5.0 V enables safe 3.3 V base drive; V_CEO = 30 V supports 12 V output rails with margin.

Audio Pre-amplifier Stage

DC Motor Driver (Small)

Use Scenario: Amplifying line-level analog signals prior to power amplification in portable audio equipment.

IC Role / Device Role / Timing Role: NPN transconductance amplifier operating in Class-A or Class-AB mode with fixed emitter degeneration.

Use Value: 50 MHz f_T and 55–60 h_FE ensure flat frequency response up to 20 kHz and low distortion at 10–100 mA collector bias.

Use Scenario: Driving brushed DC motors rated ≤ 24 V, 500 mA in industrial actuators and lab instrumentation.

IC Role / Device Role / Timing Role: Single-ended switch or linear current regulator controlling motor winding current via base-driven saturation.

Use Value: V_CEO = 30 V provides 6 V margin above 24 V rail; V_CE(sat) ≤ 0.5 V limits resistive loss to < 250 mW at 500 mA.

Relay Driver Circuit

Signal-Level Voltage Shifter

Use Scenario: Interfacing microcontroller GPIO outputs to 5–12 V relay coils requiring 20–100 mA hold current.

IC Role / Device Role / Timing Role: Low-side switch turning relay coil on/off using saturated NPN operation with base resistor biasing.

Use Value: I_C = 1.0 A rating accommodates relay inrush current spikes; h_FE ≥ 55 ensures reliable turn-on with ≤ 2 mA MCU drive.

Use Scenario: Translating 3.3 V logic signals to 5 V or 12 V levels for legacy peripheral interfacing.

IC Role / Device Role / Timing Role: Emitter-follower or common-emitter level translator with defined output swing and current sourcing capability.

Use Value: V_EBO = 5.0 V enables safe 3.3 V base drive; V_CEO = 30 V supports 12 V output rails with margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MPSW42	V_CEO = 30 V, I_C = 500 mA, h_FE = 100 min at 150 mA - lower current rating, higher gain at mid-current	Better suited for low-power signal amplification; not recommended for 1 A loads	Select MPSW42 only when load current remains ≤ 500 mA and higher h_FE improves bias stability
STMicroelectronics BD139	V_CEO = 80 V, I_C = 1.5 A, P_D = 1.25 W, TO-126 package - higher voltage/current, larger footprint	Used in higher-voltage motor drivers and power supply error amplifiers where 80 V headroom is needed	Choose BD139 when system voltage exceeds 30 V or thermal budget allows TO-126 mounting

Compared with MPSW42 and BD139, the MPSW01 offers optimal balance of 30 V/1.0 A rating, TO-92 compatibility, and 50 MHz bandwidth for cost-sensitive medium-power amplification-neither over-specified nor under-rated for 24 V industrial signal chains.

Availability

MPSW01 is available at Aetrix Electronics and suitable for industrial control panels, audio signal conditioning modules, and DC motor driver boards requiring stable component supply and long-term obsolescence management.

Supply support for MPSW01 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 devices before its acquisition by ON Semiconductor in 2016.

The MPSW01 belongs to Fairchild's general-purpose bipolar transistor product line, engineered for robust, cost-effective amplification and switching in industrial and consumer equipment where reliability and thermal predictability are essential.

FAQ

What is the maximum continuous collector current rating for the MPSW01?

The MPSW01 has a maximum continuous collector current (I_C) rating of 1.0 A at T_A = 25°C, as specified in the Absolute Maximum Ratings table. This rating assumes proper PCB thermal management per the datasheet's FR-4 mounting conditions (36 mm × 18 mm × 1.5 mm board with ≥6 cm² collector pad). Derating applies above 25°C ambient.

Does the MPSW01 have a documented f_T (transition frequency) value, and under what conditions is it measured?

Yes, the MPSW01 has a typical f_T of 50 MHz, measured under the conditions IC = 50 mA, V_CE = 10 V, and f = 20 MHz, as stated in the Small Signal Characteristics section. This value reflects the device's usable bandwidth for RF and wideband amplification applications when biased within its linear region.

What is the V_CE(sat) specification for the MPSW01, and how does it impact switching efficiency?

The MPSW01 specifies V_CE(sat) ≤ 0.5 V at I_C = 1.0 A and I_B = 100 mA. This low saturation voltage minimizes conduction loss-e.g., 500 mW dissipation at full load-making the MPSW01 efficient in saturated-switching roles like relay or LED driver stages where power loss must be constrained.

Is the MPSW01 suitable for use in audio amplifier output stages?

The MPSW01 can be used in low-power audio pre-amplifier or driver stages (e.g., line-level gain blocks or headphone drivers), but it is not intended for high-fidelity power output stages due to its 1.0 W dissipation limit and moderate f_T. For such applications, the MPSW01 delivers acceptable THD and bandwidth up to 20 kHz when operated within its linear region with appropriate heat sinking.

What package type does the MPSW01 use, and is it compatible with standard through-hole PCB assembly?

The MPSW01 uses the industry-standard TO-92 plastic package with three leads (Emitter, Collector, Base), fully compatible with manual and automated through-hole PCB assembly. Pinout follows JEDEC TO-92 configuration (flat side facing viewer: E-B-C), confirmed in Fairchild's MPSW01 Rev. A datasheet diagrams and mechanical drawings.

MPSW01 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):: 1 A

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 100mA, 1A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 50 @ 1A, 1V

Power - Max:: 1 W

Frequency - Transition:: 50MHz

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

MPSW01 FAQ

1.How can I place an order for MPSW01 through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSW01 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 MPSW01 reliable?

The price and inventory of MPSW01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSW01 is usually 5 days.

3.What payment methods are accepted for MPSW01?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSW01 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSW01?

MPSW01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSW01 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 MPSW01?

For technical support, including MPSW01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSW01 requirements.

6.How does Aetrix verify that MPSW01 is sourced from the original manufacturer or authorized distributors?

All MPSW01 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 MPSW01 meets industry standards.

7.What is the process for return or replacement of MPSW01?

All MPSW01 units undergo pre-shipment inspection (PSI). If there is an issue with MPSW01, 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 MPSW01 part is unused and in its original packaging.

Return procedure for MPSW01:

1.Submit a request within 90 days.

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

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