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

onsemi MPS651RLRA

Name: MPS651RLRA
Brand: onsemi
SKU: MPS651RLRA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPS651RLRA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPS651RLRA.pdf

Description:: TRANS NPN 60V 2A TO92

Quantity:: RFQ Add To RFQ list

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Inventory:3,128

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Product details

Overview

MPS651RLRA from onsemi is an NPN general-purpose amplifier transistor in TO-92 package, rated for 60 V_CEO, 2.0 A continuous collector current, and 1.5 W power dissipation at T_C = 25°C; it delivers h_FE ≥ 75 at I_C = 50 mA and supports switching and linear amplification in low-voltage power supply control circuits.

For engineers reviewing the MPS651RLRA datasheet, pinout, applications, or equivalent options, key selection considerations include its 60 V breakdown rating, 2.0 A saturation capability with V_CE(sat) ≤ 0.5 V, thermal resistance of 83.3°C/W (junction-to-case), and TO-92 leaded packaging for through-hole prototyping and industrial control board integration.

Technical Context

The MPS651RLRA is a silicon NPN bipolar junction transistor optimized for medium-power linear amplification and switching. It operates across −55°C to +150°C junction temperature range and exhibits stable DC current gain (h_FE ≥ 75) up to I_C = 500 mA, with f_T = 75 MHz enabling RF-capable small-signal performance.

Its safe operating area (SOA) is defined by wire bond, thermal, and second breakdown limits, supporting pulsed operation up to 100 µs at V_CE = 10 V and I_C = 2.0 A. The device uses standard TO-92 mechanical construction with emitter-base-collector pinout and Pb-free plating per onsemi's RoHS-compliant manufacturing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Supports rail voltages up to 48 V DC systems with 20% safety margin
I_C (cont.)	2.0 A - Enables direct drive of relays, solenoids, and LED arrays without external buffering
P_D @ T_C = 25°C	1.5 W - Allows high-current operation with heatsink mounting on PCB copper pour
h_FE	≥75 @ I_C = 50 mA - Ensures reliable base drive efficiency in Class-A amplifier stages
V_CE(sat)	≤0.5 V @ I_C = 2.0 A, I_B = 200 mA - Minimizes conduction loss in saturated-switch applications
f_T	75 MHz - Supports audio preamplifier and low-frequency RF front-end use up to 30 MHz

Pinout & Package

Package: TO-92 (Case 29−11), epoxy-molded, through-hole, 3-lead plastic package with standard EBC pinout orientation.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Reference node for biasing; connects to ground or low-side return path in common-emitter configurations
2	Base	Control input requiring ~1.0 V forward bias; drives with resistor-limited current to achieve target I_C
3	Collector	High-current output node; ties to load or positive rail in switching applications; requires thermal relief pad for 1.5 W dissipation

Key Features

Feature	Design Value
60 V V_CEO rating	Enables use in 48 V telecom power supplies and industrial 24–48 V control logic without derating
1.5 W P_D @ T_C = 25°C	Permits direct PCB copper heatsinking for sustained 1.5 A operation without external heatsink
h_FE ≥ 75 (I_C = 50 mA)	Reduces required base drive current by >30% versus lower-gain alternatives, easing MCU GPIO sourcing
TO-92 Pb-free variant	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 2a marking requirements

Applications

Industrial Relay Drivers	DC Power Supply Regulation
Use Scenario: Driving 24 VDC industrial relays with coil resistance 120 Ω in PLC output modules. IC Role / Device Role / Timing Role: NPN switch providing low-impedance path between relay coil and ground under microcontroller command. Use Value: V_CE(sat) ≤ 0.5 V ensures <0.5 W relay-coil power loss at 2.0 A, minimizing thermal stress on PCB traces.	Use Scenario: Pass transistor in linear adjustable 5–15 V, 1.5 A bench power supply. IC Role / Device Role / Timing Role: Series pass element controlled by op-amp feedback loop to regulate output voltage. Use Value: 1.5 W dissipation capability allows full 1.5 A load at 10 V dropout without forced air cooling.
Audio Pre-amplifier Stages	Automotive Body Control Modules
Use Scenario: First-stage voltage amplifier in battery-powered portable audio mixer with 3.3 V supply. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain stability. Use Value: f_T = 75 MHz supports flat frequency response up to 20 kHz with <1% THD at 1 V_pp output.	Use Scenario: Load switch for interior lighting control in 12 V automotive BCMs. IC Role / Device Role / Timing Role: High-side or low-side switch managing incandescent lamp current surges during cold start. Use Value: SOA-rated operation handles 10× inrush current (up to 2.0 A peak) for 100 µs without secondary breakdown.

Industrial Relay Drivers

DC Power Supply Regulation

Use Scenario: Driving 24 VDC industrial relays with coil resistance 120 Ω in PLC output modules.

IC Role / Device Role / Timing Role: NPN switch providing low-impedance path between relay coil and ground under microcontroller command.

Use Value: V_CE(sat) ≤ 0.5 V ensures <0.5 W relay-coil power loss at 2.0 A, minimizing thermal stress on PCB traces.

Use Scenario: Pass transistor in linear adjustable 5–15 V, 1.5 A bench power supply.

IC Role / Device Role / Timing Role: Series pass element controlled by op-amp feedback loop to regulate output voltage.

Use Value: 1.5 W dissipation capability allows full 1.5 A load at 10 V dropout without forced air cooling.

Audio Pre-amplifier Stages

Automotive Body Control Modules

Use Scenario: First-stage voltage amplifier in battery-powered portable audio mixer with 3.3 V supply.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain stability.

Use Value: f_T = 75 MHz supports flat frequency response up to 20 kHz with <1% THD at 1 V_pp output.

Use Scenario: Load switch for interior lighting control in 12 V automotive BCMs.

IC Role / Device Role / Timing Role: High-side or low-side switch managing incandescent lamp current surges during cold start.

Use Value: SOA-rated operation handles 10× inrush current (up to 2.0 A peak) for 100 µs without secondary breakdown.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN amplifier transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT651LT1G	SOT-23 package, 1.0 A I_C, 350 mW P_D, same V_CEO/h_FE specs	Surface-mount only; unsuitable for through-hole prototyping or high-current heatsinking	Select when board space is constrained and load current ≤ 1.0 A
2N5551	TO-92, 60 V V_CEO, but only 0.6 A I_C, 625 mW P_D, h_FE ≥ 80	Limited to sub-1 A loads; cannot replace MPS651RLRA in 2.0 A switching roles	Select for low-power signal amplification where gain consistency > current handling is prioritized

Compared with MMBT651LT1G and 2N5551, the MPS651RLRA uniquely combines TO-92 through-hole compatibility, 2.0 A current capacity, and 1.5 W thermal capability-making it the only option among the three suitable for production-grade 24–48 V industrial switching with passive heatsinking.

Availability

MPS651RLRA is available at Aetrix Electronics and suitable for industrial relay drivers, DC power supply regulation, audio pre-amplifier stages, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for MPS651RLRA 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 MPS651RLRA belongs to onsemi's legacy general-purpose bipolar transistor product line, designed specifically for cost-sensitive, medium-power analog and switching applications where reliability, thermal robustness, and TO-92 manufacturability are essential.

FAQ

What is the maximum continuous collector current rating for MPS651RLRA?

The MPS651RLRA is rated for 2.0 A continuous collector current (I_C) at T_C = 25°C. This rating assumes proper heatsinking via the collector lead and PCB copper; derating is required above 25°C case temperature per the 12 mW/°C thermal derating curve specified in the datasheet. At 75°C case temperature, the usable I_C reduces to approximately 1.4 A.

Is MPS651RLRA RoHS-compliant and lead-free?

Yes, the MPS651RLRA is a Pb-free (RoHS-compliant) device. Its ordering suffix "RLRA" denotes tape-and-reel packaging with lead-free plating, consistent with onsemi's Pb-Free strategy documented in their Soldering and Mounting Techniques Reference Manual. The device meets JEDEC J-STD-609A Class 2a marking requirements and is compatible with standard SnPb and lead-free reflow profiles.

What is the DC current gain (h_FE) of MPS651RLRA at typical operating conditions?

The MPS651RLRA guarantees h_FE ≥ 75 at I_C = 50 mA and V_CE = 2.0 V, with typical values reaching 100–150 in production lots. Gain remains ≥ 75 up to I_C = 500 mA, then decreases to ≥ 40 at I_C = 2.0 A. This wide h_FE range supports both precision biasing in linear amplifiers and robust switching in saturated-mode applications.

Can MPS651RLRA be used in switching power supplies?

The MPS651RLRA is not recommended for high-frequency switching power supplies (e.g., >100 kHz PWM converters) due to its 75 MHz f_T and relatively slow storage time. However, it is well-suited for low-frequency (<10 kHz), high-current switching roles such as relay driving, lamp dimming, and linear regulator pass elements where low V_CE(sat) and SOA robustness are more critical than switching speed.

What is the safe operating area (SOA) limit for MPS651RLRA at 100 µs pulse width?

At 100 µs pulse width and T_A = 25°C, the MPS651RLRA SOA supports up to 2.0 A collector current at V_CE = 10 V, bounded by second breakdown limits. This enables reliable handling of inductive kickback and cold-start surges in relay and lamp loads. The SOA curve is explicitly plotted in Figure 7 of the datasheet and must be consulted for non-resistive load designs.

MPS651RLRA 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):: 2 A

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 200mA, 2A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 75 @ 1A, 2V

Power - Max:: 625 mW

Frequency - Transition:: 75MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

MPS651RLRA FAQ

1.How can I place an order for MPS651RLRA through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS651RLRA 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 MPS651RLRA reliable?

The price and inventory of MPS651RLRA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS651RLRA is usually 5 days.

3.What payment methods are accepted for MPS651RLRA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS651RLRA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS651RLRA?

MPS651RLRA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS651RLRA 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 MPS651RLRA?

For technical support, including MPS651RLRA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS651RLRA requirements.

6.How does Aetrix verify that MPS651RLRA is sourced from the original manufacturer or authorized distributors?

All MPS651RLRA 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 MPS651RLRA meets industry standards.

7.What is the process for return or replacement of MPS651RLRA?

All MPS651RLRA units undergo pre-shipment inspection (PSI). If there is an issue with MPS651RLRA, 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 MPS651RLRA part is unused and in its original packaging.

Return procedure for MPS651RLRA:

1.Submit a request within 90 days.

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

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