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

Nexperia USA Inc. BF722,115

Name: BF722,115
Brand: Nexperia USA Inc.
SKU: BF722,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BF722,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BF722,115.pdf

Description:: TRANS NPN 250V 0.1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:24

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Product details

Overview

BF722 from Nexperia is an NPN high-voltage bipolar junction transistor in SOT223 (SC-73) package, rated for 250 V_CEO, 100 mA continuous collector current, and 1.2 W power dissipation at T_amb ≤ 25 °C; used in general-purpose high-voltage switching and amplification circuits such as CRT deflection, relay drivers, and flyback snubbers.

For engineers reviewing the BF722 datasheet, BF722 pinout, BF722 application, or BF722 equivalent, key selection criteria include V_CEO = 250 V, h_FE ≥ 50 at I_C = 25 mA, low feedback capacitance (C_re = 1.6 pF), thermal resistance R_th(j-sp) = 25 K/W, and SOT223 dual-collector thermal pad layout.

Technical Context

The BF722 operates as a single NPN silicon BJT with open-base V_CEO and V_CBO both rated at 250 V, enabling use in medium-voltage DC-DC converters and line-powered signal conditioning. Its h_FE is specified at 50 minimum under V_CE = 20 V and I_C = 25 mA, with V_CE(sat) ≤ 0.6 V at I_C = 30 mA / I_B = 5 mA.

Thermal performance relies on the SOT223's exposed collector pad: R_th(j-a) = 106 K/W (PCB-mounted, 1 cm² copper) and R_th(j-sp) = 25 K/W to solder point. Transition frequency f_T is 60 MHz at V_CE = 10 V, I_C = 10 mA, confirming suitability for audio-frequency switching and analog amplification up to ~10 MHz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	250 V - Maximum collector-emitter voltage with base open; defines safe operating range in high-side switch or amplifier output stage
I_C	100 mA - Continuous DC collector current rating; sets upper limit for steady-state load drive capability
h_FE	≥ 50 - Minimum DC current gain at V_CE = 20 V, I_C = 25 mA; determines required base drive for saturation
C_re	1.6 pF - Feedback capacitance at V_CE = 30 V, f = 1 MHz; limits high-frequency stability and switching speed
R_th(j-sp)	25 K/W - Junction-to-solder-point thermal resistance; enables thermal design using PCB copper area as heatsink
f_T	60 MHz - Transition frequency at V_CE = 10 V, I_C = 10 mA; confirms usable bandwidth for audio and low-MHz switching
P_tot	1.2 W - Total power dissipation at T_amb ≤ 25 °C on standard PCB; defines thermal derating envelope

Pinout & Package

SOT223 (SC-73) plastic surface-mount package with 4 leads, 2.3 mm pitch, 6.5 mm × 3.5 mm × 1.65 mm body, and integrated thermal pad connected to pins 2 and 4 (both collectors).

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal; requires current-limited drive to achieve saturation or linear operation
2	Collector (C)	Main high-voltage current path; electrically and thermally tied to exposed pad for heat conduction
3	Emiter (E)	Reference/return node; common connection for load return or emitter-follower output
4	Collector (C)	Duplicate collector terminal; improves thermal conduction and current sharing in high-power PCB layouts

Key Features

Feature	Design Value
High breakdown voltage	V_CEO = V_CBO = 250 V supports operation in 170–240 VAC-derived rails without external clamping
Low feedback capacitance	C_re = 1.6 pF minimizes Miller effect, improving switching stability in inductive loads
Dual-collector thermal design	Pins 2 and 4 both connect to collector and thermal pad, reducing R_th(j-sp) to 25 K/W
Robust thermal rating	T_j max = 150 °C and T_stg = −65 to +150 °C enable industrial ambient operation

Applications

Switch-Mode Power Supply Snubber

CRT Horizontal Deflection

Use Scenario: Absorbs voltage spikes across primary-side MOSFETs during turn-off in flyback and forward converters.

IC Role / Device Role / Timing Role: High-voltage clamp transistor dissipating transient energy via RC network.

Use Value: 250 V_CEO withstands reflected transients; 1.2 W P_tot handles repetitive pulse energy without derating.

Use Scenario: Drives horizontal deflection yoke in legacy CRT displays requiring fast current reversal and high back-EMF tolerance.

IC Role / Device Role / Timing Role: Linear switching element in resonant retrace circuit with high dI/dt capability.

Use Value: f_T = 60 MHz ensures clean edge fidelity; dual-collector layout sustains pulsed I_C peaks up to 200 mA.

Relay and Solenoid Driver

Industrial AC Line Sensing

Use Scenario: Switches 24–120 VDC inductive loads in PLC output modules and HVAC control boards.

IC Role / Device Role / Timing Role: Medium-current NPN switch interfacing microcontroller GPIO to coil loads.

Use Value: h_FE ≥ 50 guarantees full saturation with ≤5 mA base drive; V_CEO = 250 V covers worst-case flyback overshoot.

Use Scenario: Detects zero-crossing or overvoltage events on 115/230 VAC mains via resistive divider and BJT comparator front-end.

IC Role / Device Role / Timing Role: High-impedance input stage providing isolation and level-shifting before MCU ADC input.

Use Value: I_CEO ≤ 10 nA at 200 V ensures minimal leakage error; VEBO = 5 V allows safe biasing from low-voltage reference.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCV61B,215	V_CEO = 160 V, h_FE = 100–250, SOT23 package, no thermal pad	Limited to ≤160 V systems; unsuitable for 250 V snubbers or line sensing	Select only when lower voltage, higher gain, and space-constrained PCBs are prioritized
BUW13A	V_CEO = 300 V, I_C = 1 A, TO-126 package, P_tot = 25 W	Higher power handling but larger footprint and slower f_T (~3 MHz)	Choose for high-current, low-frequency switching where thermal mass outweighs size constraints

Compared with BCV61B,215 and BUW13A, the BF722 uniquely balances 250 V rating, SOT223 thermal efficiency (R_th(j-sp) = 25 K/W), and 60 MHz f_T-making it optimal for compact, medium-voltage, medium-speed switching where PCB real estate and thermal management are co-constrained.

Availability

BF722 is available at Aetrix Electronics and suitable for switch-mode power supply snubbers, CRT deflection circuits, relay drivers, and AC line sensing applications requiring stable component supply and long-term industrial availability.

Supply support for BF722 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive, industrial, and consumer power management solutions.

The BF722 belongs to Nexperia's high-voltage bipolar transistor product line, designed specifically for robust, cost-effective switching in non-automotive industrial power interfaces and analog signal conditioning circuits.

FAQ

What is the maximum safe collector-emitter voltage for BF722 in continuous DC operation?

The BF722 has an absolute maximum V_CEO of 250 V with the base open, per IEC 60134 limiting values. For reliable long-term operation, design margins should keep V_CE ≤ 200 V under worst-case transients. Derating is required above T_amb = 25 °C per the thermal resistance curve in the datasheet.

Can BF722 be used as a direct replacement for BF723 in a circuit?

No-BF722 is NPN while BF723 is its PNP complement; they are not interchangeable. Swapping them would reverse current flow direction and likely cause circuit failure. The two share identical voltage/current ratings and SOT223 packaging but opposite polarity and pinout symmetry.

How does the dual-collector configuration (pins 2 and 4) affect PCB layout?

Pins 2 and 4 are internally shorted to the same collector node and thermal pad. PCB layout must connect both to the same high-current net and maximize copper area beneath the pad (≥1 cm², single-sided, tin-plated) to achieve the specified R_th(j-sp) = 25 K/W and prevent thermal runaway at 100 mA continuous load.

Is BF722 qualified for automotive applications?

No-the October 2024 revision explicitly states "Product changed to non automotive" and directs users to -Q qualified variants for automotive use. BF722 lacks AEC-Q101 qualification, temperature cycling validation, and automotive-grade traceability; it is intended for industrial, consumer, and commercial equipment only.

BF722,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 250 V

Vce Saturation (Max) @ Ib, Ic:: 600mV @ 5mA, 30mA

Current - Collector Cutoff (Max):: 10nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 50 @ 25mA, 20V

Power - Max:: 1.2 W

Frequency - Transition:: 60MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BF722,115 FAQ

1.How can I place an order for BF722,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BF722,115 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 BF722,115 reliable?

The price and inventory of BF722,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF722,115 is usually 5 days.

3.What payment methods are accepted for BF722,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF722,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BF722,115?

BF722,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BF722,115 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 BF722,115?

For technical support, including BF722,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF722,115 requirements.

6.How does Aetrix verify that BF722,115 is sourced from the original manufacturer or authorized distributors?

All BF722,115 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 BF722,115 meets industry standards.

7.What is the process for return or replacement of BF722,115?

All BF722,115 units undergo pre-shipment inspection (PSI). If there is an issue with BF722,115, 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 BF722,115 part is unused and in its original packaging.

Return procedure for BF722,115:

1.Submit a request within 90 days.

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

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