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

onsemi MPS751G

Name: MPS751G
Brand: onsemi
SKU: MPS751G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPS751G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MPS751G.pdf

Description:: TRANS PNP 60V 2A TO92

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPS751G from onsemi is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching in low-to-medium power linear and digital circuits. It features V_CEO = 60 V, I_C = 2.0 A continuous, h_FE ≥ 75 at I_C = 50 mA, V_CE(sat) ≤ 0.5 V at I_C = 2.0 A / I_B = 200 mA, and TO-92 package - commonly used in relay drivers, power supply control, and discrete logic interface stages.

For engineers reviewing the MPS751G datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, 60 V V_CEO, 2.0 A collector current capability, saturation voltage under high drive, and TO-92 thermal performance in ambient-constrained designs.

Technical Context

The MPS751G operates as a medium-power PNP BJT with fixed gain structure optimized for DC-coupled amplification and saturated-switching operation. Its V_CB = 80 V and V_EB = 5.0 V ratings support robust reverse-bias margin in emitter-follower or complementary pair configurations.

Thermal design is constrained by R_θJA = 200°C/W (ambient) and R_θJC = 83.3°C/W (case), requiring careful PCB copper area planning when operating near 1.5 W P_D @ T_C = 25°C. Safe Operating Area (SOA) curves confirm stable operation up to 2.0 A at V_CE ≤ 1.0 V under pulsed conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum collector-emitter voltage before breakdown; enables use in 48 V rail switching and higher-voltage analog stages.
I_C (cont.)	2.0 A - Continuous collector current rating; supports relay coils, LED arrays, and small solenoid loads without forced cooling.
h_FE	≥75 @ I_C = 50 mA - Sufficient DC gain for single-stage amplifier biasing and base-drive simplification in low-speed switches.
V_CE(sat)	≤0.5 V @ I_C = 2.0 A / I_B = 200 mA - Low saturation voltage minimizes conduction loss and self-heating during high-current switching.
f_T	75 MHz - Transition frequency suitable for audio-frequency amplification and sub-MHz digital signal switching, not RF.
P_D @ T_C	1.5 W - Power dissipation limit at case temperature 25°C; requires heatsinking or derating above 25°C at 12 mW/°C.

Pinout & Package

Package: TO-92 (Case 29-11), straight or bent lead, Pb-free, through-hole mounting. Dimensions per ANSI Y14.5M: body height ~5.2 mm, lead pitch 1.27 mm, max width 4.45 mm.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP device	Connected to higher potential (e.g., V_CC) in common-emitter switch; sets reference for base bias network.
2 (Base)	Control input for minority-carrier injection	Requires current-limited drive (typically 5–10% of I_C) to ensure saturation; sensitive to ESD due to thin oxide layer.
3 (Collector)	Current sink terminal	Connected to load and ground return path; carries full switched current; thermally coupled to package backside.

Key Features

Feature	Design Value
Pb-Free TO-92 package	Complies with RoHS Directive 2011/65/EU; compatible with standard SnPb and lead-free reflow profiles.
High V_CB = 80 V	Enables safe operation in inductive load flyback scenarios where collector voltage spikes exceed supply rail.
Low V_BE(sat) = 1.2 V	Reduces base drive power loss and eases compatibility with 3.3 V or 5 V microcontroller GPIO outputs.
Wide T_J range: −55°C to +150°C	Validated for automotive under-hood, industrial motor control, and outdoor power equipment environments.

Applications

Relay Driver Stage	Linear Voltage Regulator Pass Element
Use Scenario: Driving 12 V/500 mA electromagnetic relay coil from a microcontroller GPIO pin via base resistor. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, sinking relay coil current to ground when base is pulled low. Use Value: V_CE(sat) ≤ 0.5 V ensures <0.25 W dissipation at full load, eliminating need for heatsink; h_FE ≥ 75 allows 20 mA base drive to switch 2 A.	Use Scenario: Discrete pass transistor in adjustable 3-terminal linear regulator supplying 5 V/1.2 A to FPGA core rails. IC Role / Device Role / Timing Role: Series pass element controlling output voltage via feedback loop; operates in active region with constant V_CE ≈ 3–5 V. Use Value: 60 V V_CEO headroom accommodates 24 V input; 2.0 A I_C rating supports peak transient loads without dropout.
Complementary BJT Pair	DC Motor H-Bridge Low-Side Switch
Use Scenario: Paired with NPN MPS651G to form Class AB audio output stage in 5 W amplifier. IC Role / Device Role / Timing Role: PNP half of push-pull emitter-follower output stage; delivers negative half-cycle current to speaker load. Use Value: Matched f_T (75 MHz) and h_FE profile with MPS651G minimizes crossover distortion; TO-92 symmetry simplifies PCB layout.	Use Scenario: Low-side switch controlling direction and enable of 24 V/1.5 A brushed DC motor in robotic actuator. IC Role / Device Role / Timing Role: Saturated switch in common-emitter configuration; turned ON/OFF by PWM signal applied to base through current-limiting resistor. Use Value: 2.0 A I_C rating exceeds motor stall current; V_CE(sat) ≤ 0.5 V limits conduction loss to <0.75 W at full load.

Relay Driver Stage

Linear Voltage Regulator Pass Element

Use Scenario: Driving 12 V/500 mA electromagnetic relay coil from a microcontroller GPIO pin via base resistor.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, sinking relay coil current to ground when base is pulled low.

Use Value: V_CE(sat) ≤ 0.5 V ensures <0.25 W dissipation at full load, eliminating need for heatsink; h_FE ≥ 75 allows 20 mA base drive to switch 2 A.

Use Scenario: Discrete pass transistor in adjustable 3-terminal linear regulator supplying 5 V/1.2 A to FPGA core rails.

IC Role / Device Role / Timing Role: Series pass element controlling output voltage via feedback loop; operates in active region with constant V_CE ≈ 3–5 V.

Use Value: 60 V V_CEO headroom accommodates 24 V input; 2.0 A I_C rating supports peak transient loads without dropout.

Complementary BJT Pair

DC Motor H-Bridge Low-Side Switch

Use Scenario: Paired with NPN MPS651G to form Class AB audio output stage in 5 W amplifier.

IC Role / Device Role / Timing Role: PNP half of push-pull emitter-follower output stage; delivers negative half-cycle current to speaker load.

Use Value: Matched f_T (75 MHz) and h_FE profile with MPS651G minimizes crossover distortion; TO-92 symmetry simplifies PCB layout.

Use Scenario: Low-side switch controlling direction and enable of 24 V/1.5 A brushed DC motor in robotic actuator.

IC Role / Device Role / Timing Role: Saturated switch in common-emitter configuration; turned ON/OFF by PWM signal applied to base through current-limiting resistor.

Use Value: 2.0 A I_C rating exceeds motor stall current; V_CE(sat) ≤ 0.5 V limits conduction loss to <0.75 W at full load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT751LT1G	SOT-23 package (vs. TO-92); lower P_D = 350 mW; I_C = 1.0 A max; same V_CEO = 60 V.	Surface-mount only; unsuitable for >1 A continuous loads or manual prototyping.	Select when board space is constrained and thermal load is ≤350 mW.
BC807-40	SOT-23 package; V_CEO = 45 V (lower); h_FE = 250–630 (wider spread); I_C = 500 mA.	Not suitable for 48 V systems or >500 mA loads; higher gain complicates bias stability.	Select only for low-voltage, low-current signal switching where gain linearity is critical.

Compared with MMBT751LT1G and BC807-40, the MPS751G provides higher current handling (2.0 A), through-hole TO-92 mountability, and proven thermal robustness in ambient-constrained linear regulator and relay driver roles - making it preferred for prototyping, industrial controls, and legacy through-hole production.

Availability

MPS751G is available at Aetrix Electronics and suitable for relay drivers, linear voltage regulators, complementary amplifier stages, and DC motor control circuits requiring stable component supply across industrial, automation, and embedded design cycles.

Supply support for MPS751G 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 MPS751G belongs to onsemi's legacy general-purpose BJT family, engineered for reliability and manufacturability in cost-sensitive, high-volume linear and switching applications - especially where TO-92 mechanical robustness and thermal predictability are prioritized.

FAQ

What is the maximum continuous collector current rating for the MPS751G?

The MPS751G has a maximum continuous collector current (I_C) rating of 2.0 A at T_A = 25°C. This rating assumes adequate PCB copper area for heat dissipation; derating is required above 25°C ambient at 5.0 mW/°C. At case temperature T_C = 25°C, the device supports up to 1.5 W total power dissipation, enabling sustained 2.0 A operation only with effective heatsinking or forced airflow. The MPS751G datasheet specifies this limit under defined thermal test conditions.

Is the MPS751G pin-compatible with the MPS750G?

Yes, the MPS751G is pin-compatible with the MPS750G - both are PNP transistors in TO-92 packages with identical pinout (Emitter-Base-Collector on pins 1-2-3). However, the MPS751G offers higher voltage ratings: V_CEO = 60 V vs. 40 V for MPS750G, and V_CB = 80 V vs. 60 V. Designers upgrading from MPS750G to MPS751G retain the same footprint but gain headroom for 48 V systems and improved flyback tolerance.

What is the typical DC current gain (h_FE) of the MPS751G at 1.0 A collector current?

The MPS751G exhibits h_FE ≥ 75 at I_C = 50 mA and V_CE = 2.0 V, but at I_C = 1.0 A and V_CE = 2.0 V, the minimum guaranteed h_FE drops to 75 (per datasheet Table "ON CHARACTERISTICS"). This flat gain profile across 50 mA to 1.0 A supports predictable base drive sizing in high-current switching applications. Actual measured h_FE may vary with temperature and individual unit dispersion.

Can the MPS751G be used in audio amplifier output stages?

Yes, the MPS751G is suitable for Class AB audio output stages when paired with its NPN counterpart MPS651G. Its f_T = 75 MHz and h_FE stability across collector current support bandwidth up to several hundred kHz. The TO-92 package's thermal resistance (R_θJA = 200°C/W) requires conservative power handling - limiting practical use to ≤1 W output into 8 Ω loads without heatsinking. For higher fidelity, complementary SOA matching with MPS651G is essential.

Does the MPS751G have built-in ESD protection?

No, the MPS751G does not integrate ESD protection diodes. Its base-emitter junction is susceptible to electrostatic discharge damage, with V_EB breakdown rated at only 5.0 V. During handling and PCB assembly, standard ESD precautions must be observed: grounded workstations, ionizers, and wrist straps. External protection (e.g., series base resistor + parallel Zener) is recommended in systems exposed to user-accessible connectors or long traces.

MPS751G 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:: PNP

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)

MPS751G FAQ

1.How can I place an order for MPS751G through Aetrix?

Please submit a Request for Quotation (RFQ) for MPS751G 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 MPS751G reliable?

The price and inventory of MPS751G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPS751G is usually 5 days.

3.What payment methods are accepted for MPS751G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPS751G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPS751G?

MPS751G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPS751G 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 MPS751G?

For technical support, including MPS751G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPS751G requirements.

6.How does Aetrix verify that MPS751G is sourced from the original manufacturer or authorized distributors?

All MPS751G 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 MPS751G meets industry standards.

7.What is the process for return or replacement of MPS751G?

All MPS751G units undergo pre-shipment inspection (PSI). If there is an issue with MPS751G, 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 MPS751G part is unused and in its original packaging.

Return procedure for MPS751G:

1.Submit a request within 90 days.

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

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