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

onsemi MPSW01ARLRA

Name: MPSW01ARLRA
Brand: onsemi
SKU: MPSW01ARLRA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSW01ARLRA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPSW01ARLRA.pdf

Description:: TRANS NPN 40V 1A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPSW01ARLRA from onsemi is an NPN silicon bipolar junction transistor (BJT) in a TO-92 package, rated for 1.0 W at T_A = 25°C and 2.5 W at T_C = 25°C, with V_CEO = 40 V, I_C = 1000 mA, and h_FE ≥ 50 at I_C = 1000 mA - used in low-voltage DC motor drivers and relay interface circuits.

For engineers reviewing the MPSW01ARLRA datasheet, pinout, applications, or equivalent options, key selection criteria include its 40 V V_CEO, 1000 mA continuous collector current capability, 0.5 V V_CE(sat) at I_C/I_B = 10, Pb-free TO-92 packaging, and suitability for high-current switching in industrial control modules.

Technical Context

The MPSW01ARLRA is a general-purpose NPN BJT optimized for medium-power linear and switching applications. It features a minimum h_FE of 50 at I_C = 1000 mA and V_CE = 1.0 V, V_CE(sat) ≤ 0.5 V under same conditions, and f_T = 50 MHz - confirming usable gain-bandwidth for audio-frequency switching and low-speed digital logic interfacing.

Thermal design is supported by R_JA = 125 °C/W and R_JC = 50 °C/W, enabling operation up to +150 °C junction temperature. Its V_BRCBO = 50 V and V_BREBO = 5.0 V define safe biasing limits for emitter-base reverse blocking and collector-base overvoltage protection in inductive load circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum collector-emitter voltage before breakdown; sets upper rail limit for 24 V DC control systems.
I_C (continuous)	1000 mA - Sustained collector current capacity; supports driving 500–800 mA loads with 2× safety margin.
V_CE(sat)	≤ 0.5 V at I_C = 1000 mA, I_B = 100 mA - Low saturation voltage minimizes power loss and heat generation in switching mode.
h_FE	≥ 50 at I_C = 1000 mA, V_CE = 1.0 V - Ensures reliable base drive sizing for predictable turn-on in saturated switch designs.
f_T	50 MHz - Enables stable operation up to ~5–10 MHz switching frequencies with adequate gain margin.
R_JC	50 °C/W - Allows direct heatsinking via case contact; enables 2.5 W dissipation with <25 °C case-to-ambient rise.

Pinout & Package

Package: TO-92 (Case 29-10), straight-lead or bent-lead configuration, Pb-free, 1 W power rating at ambient, 2.5 W at case. Marking: "MPSW01A" followed by date code; pin 1 = Base, pin 2 = Emitter, pin 3 = Collector (Style 2 per onsemi mechanical drawing).

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Current-controlled input terminal	Receives base drive current to saturate or cut off the transistor; requires ≥100 mA for full 1 A collector conduction.
2 (Emitter)	Common reference node for BJT operation	Connected to ground or low-side return path; carries full emitter current (I_C + I_B) in common-emitter configuration.
3 (Collector)	High-current output terminal	Switches load between supply rail and emitter; handles up to 1000 mA continuous with <0.5 V drop in saturation.

Key Features

Feature	Design Value
Pb-free TO-92 package	Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles and automated assembly.
1000 mA continuous collector current	Supports direct drive of solenoids, small relays, and LED arrays without external driver stages.
V_CE(sat) ≤ 0.5 V @ I_C/I_B = 10	Reduces conduction loss to <500 mW at full load, easing thermal management in compact enclosures.
−55 °C to +150 °C operating range	Validated for use in automotive under-hood, industrial PLC I/O modules, and outdoor equipment.
f_T = 50 MHz	Provides sufficient bandwidth for PWM-based dimming, motor speed control, and signal amplification up to 5 MHz.

Applications

DC Motor Control	Relay Driver Interface
Use Scenario: Driving 12 V, 800 mA brushed DC motors in HVAC actuators and robotic joints. IC Role / Device Role / Timing Role: NPN BJT switch controlling motor direction and enable state in half-H-bridge configurations. Use Value: Low V_CE(sat) reduces heat buildup during continuous duty; 40 V V_CEO accommodates back-EMF spikes up to 30 V.	Use Scenario: Interfacing microcontroller GPIOs to 24 V industrial relays with coil resistance ~200 Ω. IC Role / Device Role / Timing Role: Single-transistor level shifter and current amplifier enabling logic-level control of higher-voltage loads. Use Value: h_FE ≥ 50 ensures 20 mA MCU output can reliably switch 1 A relay coil current with margin.
LED Array Switching	Power Supply Enable Circuit
Use Scenario: Switching 5 V, 1 A LED strips in signage and architectural lighting systems. IC Role / Device Role / Timing Role: High-current low-side switch turning on/off multiple parallel LED strings. Use Value: TO-92 package allows dense PCB layout; 1000 mA rating covers peak inrush and steady-state current simultaneously.	Use Scenario: Enabling 5 V standby rails in embedded power management subsystems using microcontroller wake signals. IC Role / Device Role / Timing Role: Controlled pass element activating downstream LDOs or DC-DC converters. Use Value: Fast turn-on (f_T = 50 MHz) ensures sub-microsecond enable response; R_JC = 50 °C/W supports brief 2.5 W surges during startup.

DC Motor Control

Relay Driver Interface

Use Scenario: Driving 12 V, 800 mA brushed DC motors in HVAC actuators and robotic joints.

IC Role / Device Role / Timing Role: NPN BJT switch controlling motor direction and enable state in half-H-bridge configurations.

Use Value: Low V_CE(sat) reduces heat buildup during continuous duty; 40 V V_CEO accommodates back-EMF spikes up to 30 V.

Use Scenario: Interfacing microcontroller GPIOs to 24 V industrial relays with coil resistance ~200 Ω.

IC Role / Device Role / Timing Role: Single-transistor level shifter and current amplifier enabling logic-level control of higher-voltage loads.

Use Value: h_FE ≥ 50 ensures 20 mA MCU output can reliably switch 1 A relay coil current with margin.

LED Array Switching

Power Supply Enable Circuit

Use Scenario: Switching 5 V, 1 A LED strips in signage and architectural lighting systems.

IC Role / Device Role / Timing Role: High-current low-side switch turning on/off multiple parallel LED strings.

Use Value: TO-92 package allows dense PCB layout; 1000 mA rating covers peak inrush and steady-state current simultaneously.

Use Scenario: Enabling 5 V standby rails in embedded power management subsystems using microcontroller wake signals.

IC Role / Device Role / Timing Role: Controlled pass element activating downstream LDOs or DC-DC converters.

Use Value: Fast turn-on (f_T = 50 MHz) ensures sub-microsecond enable response; R_JC = 50 °C/W supports brief 2.5 W surges during startup.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-current switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT4401LT1G	V_CEO = 40 V, I_C = 600 mA, V_CE(sat) = 0.75 V @ I_C/I_B = 10 - lower current rating and higher saturation voltage.	Not suitable for 1 A continuous loads; limited to ≤500 mA switching with higher conduction loss.	Select when board space is constrained (SOT-23) and load current ≤600 mA.
PN2222A PBFREE	V_CEO = 30 V, I_C = 800 mA, h_FE = 100 min @ I_C = 10 mA - lower voltage rating and reduced current headroom.	Requires derating below 24 V systems; marginal for 1 A inductive loads due to lower I_C and thermal limits.	Choose only for legacy designs where 30 V max and <800 mA loads are acceptable.

Compared with MMBT4401LT1G and PN2222A PBFREE, MPSW01ARLRA delivers superior 1000 mA continuous current handling, lower 0.5 V V_CE(sat), and higher 2.5 W case-rated power dissipation - making it the preferred choice for robust, thermally demanding 24 V industrial switching.

Availability

MPSW01ARLRA is available at Aetrix Electronics and suitable for DC motor control, relay driver interfaces, and LED array switching requiring stable component supply across industrial automation, building controls, and embedded power management programs.

Supply support for MPSW01ARLRA 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, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The MPSW01ARLRA belongs to onsemi's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability discrete switching in industrial control, appliance, and power interface circuits.

FAQ

What is the maximum continuous collector current rating for MPSW01ARLRA?

The MPSW01ARLRA is rated for 1000 mA (1 A) continuous collector current at T_A = 25°C. This rating assumes proper PCB copper area for heat dissipation and is validated per onsemi's datasheet test conditions. Derating applies above 25°C ambient, with thermal resistance R_JA = 125 °C/W defining the slope.

Is MPSW01ARLRA pin-compatible with standard TO-92 NPN transistors like the 2N2222?

No - MPSW01ARLRA uses Style 2 pinout (pin 1 = Base, pin 2 = Emitter, pin 3 = Collector), whereas 2N2222 typically follows Style 1 (pin 1 = Emitter, pin 2 = Base, pin 3 = Collector). Swapping them without verifying pin mapping risks circuit malfunction or device damage.

What is the typical V_CE(sat) of MPSW01ARLRA under full-load conditions?

The MPSW01ARLRA has a maximum V_CE(sat) of 0.5 V when I_C = 1000 mA and I_B = 100 mA (I_C/I_B = 10), per onsemi's Electrical Characteristics table. This value is guaranteed across temperature and process variation, enabling accurate power loss calculation in switch-mode designs.

Does MPSW01ARLRA support Pb-free soldering processes?

Yes - MPSW01ARLRA is explicitly marked as Pb-free in the ordering information and conforms to JEDEC J-STD-020 moisture sensitivity level (MSL) requirements. Its TO-92 package is qualified for standard lead-free reflow profiles with peak temperatures up to 260°C.

Can MPSW01ARLRA be used in linear amplifier applications?

While the MPSW01ARLRA exhibits f_T = 50 MHz and h_FE ≥ 50, it is optimized for switching - not linear amplification. Its SOA curve shows second-breakdown limitations in active region, and thermal performance favors pulsed/saturated operation. For linear use, dedicated RF or audio transistors with broader safe operating area are recommended.

MPSW01ARLRA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1 A

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

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

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 100mA, 1V

Power - Max:: 1 W

Frequency - Transition:: 50MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

MPSW01ARLRA FAQ

1.How can I place an order for MPSW01ARLRA through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSW01ARLRA 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 MPSW01ARLRA reliable?

The price and inventory of MPSW01ARLRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSW01ARLRA is usually 5 days.

3.What payment methods are accepted for MPSW01ARLRA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSW01ARLRA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSW01ARLRA?

MPSW01ARLRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSW01ARLRA 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 MPSW01ARLRA?

For technical support, including MPSW01ARLRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSW01ARLRA requirements.

6.How does Aetrix verify that MPSW01ARLRA is sourced from the original manufacturer or authorized distributors?

All MPSW01ARLRA 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 MPSW01ARLRA meets industry standards.

7.What is the process for return or replacement of MPSW01ARLRA?

All MPSW01ARLRA units undergo pre-shipment inspection (PSI). If there is an issue with MPSW01ARLRA, 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 MPSW01ARLRA part is unused and in its original packaging.

Return procedure for MPSW01ARLRA:

1.Submit a request within 90 days.

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

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