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

onsemi MPSW05

Name: MPSW05
Brand: onsemi
SKU: MPSW05
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPSW05

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPSW05.pdf

Description:: TRANS NPN 60V 0.5A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPSW05 from onsemi is an NPN silicon bipolar junction transistor (BJT) designed for general-purpose low-power amplification and switching in discrete analog circuits. It delivers 1.0 W total device dissipation at TA = 25°C, supports V_CEO = 60 Vdc and I_C = 500 mAdc continuous, and operates across −55°C to +150°C junction temperature range - commonly used in audio preamplifier stages, relay drivers, and low-frequency signal conditioning.

For engineers reviewing the MPSW05 datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-92 package thermal resistance (R_JA = 125°C/W), DC current gain (h_FE ≥ 80 at I_C = 50 mA), saturation voltage (V_CE(sat) ≤ 0.4 V), f_T = 50 MHz bandwidth capability, and Pb-free availability in bulk and tape-and-reel formats.

Technical Context

The MPSW05 is a single NPN BJT optimized for linear amplification and saturated switching in low-to-moderate frequency applications up to 50 MHz. Its design emphasizes stable h_FE across temperature (−55°C to +125°C), low V_BE(sat) (≤1.2 V), and robust secondary breakdown immunity per Figure 7's SOA curve.

It features fixed terminal assignment (Emitter–Base–Collector on pins 1–2–3), operates with V_EBO = 4.0 Vdc maximum, and exhibits C_obo = 12 pF at V_CB = 10 V - enabling predictable small-signal behavior in emitter-follower and common-emitter configurations without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 Vdc - Maximum collector-emitter voltage before breakdown; sets safe operating headroom in 48 V rail or automotive 12 V systems with transients.
I_C (continuous)	500 mAdc - Continuous collector current rating; supports relay coils, LED arrays, and Class-A amplifier stages up to ~500 mW output.
P_D @ T_A = 25°C	1.0 W - Total power dissipation limit at ambient; requires heatsinking or derating above 25°C (8.0 mW/°C).
h_FE	≥80 at I_C = 50 mAdc, V_CE = 1.0 V - Sufficient DC gain for single-stage amplification without feedback instability.
f_T	50 MHz - Current-gain bandwidth product; enables reliable operation in audio and sub-RF signal paths (e.g., IF stages up to 10 MHz).
R_JA	125°C/W - Junction-to-ambient thermal resistance in free-air; defines minimum PCB copper area needed for thermal management.

Pinout & Package

Package: TO-92 (Case 29-10, Style 1), 3-lead through-hole plastic package with bent leads. Pb-free variant marked "MPSW05G".

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink node; connects to ground or low-impedance return path; base-emitter junction forward-biased during conduction.
2	Base	Control input; requires current-limited drive (e.g., 10 mA max for 250 mA I_C) to ensure saturation without overdrive loss.
3	Collector	Current source node; connects to load and positive supply; handles full I_C and V_CE stress during switching or amplification.

Key Features

Feature	Design Value
1.0 W power handling at T_A = 25°C	Enables use in compact, non-heatsinked amplifier and driver circuits where space limits thermal mass.
V_CEO = 60 Vdc rating	Supports operation in 24 V industrial control rails and 48 V telecom interfaces with margin against voltage spikes.
h_FE ≥ 80 (I_C = 50 mA)	Reduces required base drive current and simplifies bias network design in discrete gain stages.
f_T = 50 MHz	Permits stable small-signal amplification up to mid-audio frequencies without peaking or phase shift issues.
Pb-free packaging (MPSW05G)	Meets RoHS compliance requirements for consumer, industrial, and medical electronics without requalification.

Applications

Audio Preamp Stage	Relay Driver Circuit
Use Scenario: Low-noise voltage amplification of microphone or line-level signals prior to ADC sampling. IC Role / Device Role / Timing Role: Discrete NPN BJT configured in common-emitter topology for 20–20 kHz analog gain. Use Value: Delivers >30 dB voltage gain with <1% THD at 1 kHz using resistive biasing and no external compensation.	Use Scenario: Driving 12 VDC coil relays in PLC I/O modules requiring fast turn-on/turn-off and flyback protection. IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current up to 400 mA with minimal V_CE(sat). Use Value: Achieves <100 µs turn-on and <200 µs turn-off with 10 mA base drive, reducing relay chatter and contact wear.
LED Current Regulator	Low-Frequency Oscillator
Use Scenario: Constant-current source for indicator LEDs or status lighting in embedded instrumentation panels. IC Role / Device Role / Timing Role: Emitter-follower configured BJT with sense resistor to regulate LED current independent of supply variation. Use Value: Maintains ±3% LED brightness over 9–15 V input range and −40°C to +85°C ambient due to stable h_FE and V_BE.	Use Scenario: Astable multivibrator core in timing circuits for power-on reset, blinker control, or clock generation below 100 kHz. IC Role / Device Role / Timing Role: Cross-coupled NPN pair generating square wave via RC time constants and transistor switching thresholds. Use Value: Provides jitter-free 1–50 kHz output with <5% duty cycle variation across temperature using standard 1% resistors and capacitors.

Audio Preamp Stage

Relay Driver Circuit

Use Scenario: Low-noise voltage amplification of microphone or line-level signals prior to ADC sampling.

IC Role / Device Role / Timing Role: Discrete NPN BJT configured in common-emitter topology for 20–20 kHz analog gain.

Use Value: Delivers >30 dB voltage gain with <1% THD at 1 kHz using resistive biasing and no external compensation.

Use Scenario: Driving 12 VDC coil relays in PLC I/O modules requiring fast turn-on/turn-off and flyback protection.

IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current up to 400 mA with minimal V_CE(sat).

Use Value: Achieves <100 µs turn-on and <200 µs turn-off with 10 mA base drive, reducing relay chatter and contact wear.

LED Current Regulator

Low-Frequency Oscillator

Use Scenario: Constant-current source for indicator LEDs or status lighting in embedded instrumentation panels.

IC Role / Device Role / Timing Role: Emitter-follower configured BJT with sense resistor to regulate LED current independent of supply variation.

Use Value: Maintains ±3% LED brightness over 9–15 V input range and −40°C to +85°C ambient due to stable h_FE and V_BE.

Use Scenario: Astable multivibrator core in timing circuits for power-on reset, blinker control, or clock generation below 100 kHz.

IC Role / Device Role / Timing Role: Cross-coupled NPN pair generating square wave via RC time constants and transistor switching thresholds.

Use Value: Provides jitter-free 1–50 kHz output with <5% duty cycle variation across temperature using standard 1% resistors and capacitors.

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
BC547B	V_CEO = 45 Vdc, P_D = 500 mW, h_FE = 200–450 (typical), TO-92 package	Lower voltage/power rating; higher h_FE but narrower SOA; not suitable for 60 V transient environments	Select when lower base drive and tighter gain tolerance are prioritized over voltage headroom and power handling.
2N3904	V_CEO = 40 Vdc, P_D = 625 mW, f_T = 300 MHz, TO-92 package	Higher f_T but lower V_CEO and thermal robustness; more sensitive to second breakdown under pulse loads	Prefer for high-speed switching (<100 ns) or RF detector roles where bandwidth outweighs voltage margin.

Compared with BC547B and 2N3904, the MPSW05 offers superior voltage standoff and thermal capability for industrial relay driving and audio amplification, while trading off some DC gain linearity and RF performance - making it optimal where reliability under sustained load and transient conditions is critical.

Availability

MPSW05 is available at Aetrix Electronics and suitable for audio preamplifier stages, relay driver circuits, and LED current regulator designs requiring stable component supply, RoHS-compliant packaging, and consistent parametric performance across production batches.

Supply support for MPSW05 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 manufacturer specializing in energy-efficient power, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.

The MPSW05 belongs to onsemi's legacy general-purpose transistor family, engineered for cost-sensitive, high-reliability discrete amplification and switching in industrial controls, instrumentation, and legacy audio equipment.

FAQ

What is the maximum continuous collector current rating for the MPSW05?

The MPSW05 has a maximum continuous collector current (I_C) rating of 500 mAdc at T_A = 25°C. This rating assumes proper PCB thermal relief and derating per the 8.0 mW/°C slope above ambient temperature. Exceeding this current without adequate heat sinking risks thermal runaway or permanent degradation of h_FE. The MPSW05 datasheet confirms this value in the Maximum Ratings table under "Collector Current – Continuous".

Does the MPSW05 support Pb-free assembly processes?

Yes, the MPSW05G variant is explicitly designated as Pb-free and complies with RoHS Directive 2011/65/EU. It uses matte tin lead finish and is qualified for standard reflow profiles including J-STD-020D. The "G" suffix in the part marking (e.g., MPSW05G) and ordering codes (5000 Units/Bulk) confirms Pb-free status - distinct from legacy MPSW05 variants without the suffix.

What is the typical DC current gain (h_FE) of the MPSW05 at operating conditions?

The MPSW05 specifies a minimum h_FE of 80 at I_C = 50 mAdc and V_CE = 1.0 Vdc, with typical values ranging from 100 to 200 under those conditions. This gain remains stable across −55°C to +125°C per Figure 1, supporting predictable biasing in temperature-varying environments. The MPSW05 datasheet lists this in the "ON CHARACTERISTICS" section.

Can the MPSW05 be used in switching applications requiring fast turn-on and turn-off?

Yes, the MPSW05 achieves V_CE(sat) ≤ 0.4 V at I_C = 250 mAdc and I_B = 10 mAdc, enabling efficient saturated switching. Its f_T = 50 MHz and low C_obo = 12 pF support clean edges up to ~5 MHz. However, for sub-100 ns transitions, devices like the 2N3904 may offer faster recovery - the MPSW05 is best suited for <100 kHz switching with moderate speed requirements.

What is the thermal resistance from junction to ambient (R_JA) for the MPSW05 in free-air conditions?

The MPSW05 has a specified R_JA of 125°C/W under free-air conditions (no heatsink, minimal PCB copper). This value is measured per JEDEC JESD51-2 and defines the worst-case thermal gradient between junction and ambient air. To maintain T_J ≤ 150°C at 1.0 W dissipation, ambient must stay below 50°C - or additional copper area/heatsinking must reduce effective R_JA. The MPSW05 datasheet reports this in the Thermal Characteristics table.

MPSW05 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):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 10mA, 250mA

Current - Collector Cutoff (Max):: 500nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 250mA, 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)

MPSW05 FAQ

1.How can I place an order for MPSW05 through Aetrix?

Please submit a Request for Quotation (RFQ) for MPSW05 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 MPSW05 reliable?

The price and inventory of MPSW05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPSW05 is usually 5 days.

3.What payment methods are accepted for MPSW05?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPSW05 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPSW05?

MPSW05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPSW05 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 MPSW05?

For technical support, including MPSW05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPSW05 requirements.

6.How does Aetrix verify that MPSW05 is sourced from the original manufacturer or authorized distributors?

All MPSW05 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 MPSW05 meets industry standards.

7.What is the process for return or replacement of MPSW05?

All MPSW05 units undergo pre-shipment inspection (PSI). If there is an issue with MPSW05, 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 MPSW05 part is unused and in its original packaging.

Return procedure for MPSW05:

1.Submit a request within 90 days.

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

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