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

Nexperia USA Inc. BF720,115

Name: BF720,115
Brand: Nexperia USA Inc.
SKU: BF720,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BF720,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: BF720,115.pdf

Description:: TRANS NPN 300V 0.1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:2,523

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Product details

Overview

BF720 from Nexperia is an NPN high-voltage transistor in SOT223 (SC-73) package, rated for 300 V V_CEO, 100 mA I_C, and 1.2 W P_tot at T_amb ≤ 25 °C. It delivers h_FE ≥ 50 at 25 mA/20 V and features low 1.6 pF feedback capacitance (C_re), enabling stable operation in high-voltage switching and amplifier stages of industrial power supplies.

For engineers reviewing the BF720 datasheet, BF720 pinout, BF720 application, or BF720 equivalent, key selection criteria include verified V_CEO = 300 V, dual-collector thermal design in SOT223, R_th(j-sp) = 25 K/W, and confirmed PNP complement BF723 for push-pull configurations.

Technical Context

This device operates as a single NPN bipolar junction transistor optimized for high-voltage linear and switching applications up to 300 V. Its dual-collector pinning (Pins 2 & 4) enhances thermal dissipation via PCB copper area, while low C_re (1.6 pF) minimizes Miller effect in high-frequency gain stages.

The BF720 is characterized with h_FE ≥ 50 at V_CE = 20 V / I_C = 25 mA, V_CE(sat) ≤ 0.6 V at I_C = 30 mA / I_B = 5 mA, and f_T = 60 MHz - confirming suitability for medium-speed switching and analog amplification where voltage headroom and thermal robustness are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 V - supports primary-side switching in offline SMPS up to 265 V AC mains with safety margin
I_C	100 mA continuous - suitable for driver-stage current handling in HV gate drivers or relay interfaces
h_FE	≥50 at 25 mA - ensures reliable base drive efficiency in fixed-bias or emitter-follower configurations
C_re	1.6 pF - reduces high-frequency instability in common-emitter amplifiers above 10 MHz
R_th(j-sp)	25 K/W - enables direct thermal coupling to PCB solder pad, improving reliability under pulsed loads
f_T	60 MHz - supports RF preamp or broadband signal conditioning up to ~10 MHz usable bandwidth

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 heatsink tab connected to collector (Pins 2 & 4).

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal; requires current-limited drive due to h_FE-dependent I_B (e.g., 0.5 mA typical for 25 mA I_C)
2	Collector (C)	Main high-voltage current path; electrically and thermally tied to exposed pad for PCB heat sinking
3	Emiter (E)	Reference node for biasing; must be routed with low-inductance trace in switching applications
4	Collector (C)	Duplicate collector terminal - used in parallel with Pin 2 to reduce thermal resistance and improve current sharing

Key Features

Feature	Design Value
Dual-collector thermal path	Pins 2 & 4 both connect to internal collector and exposed copper pad, lowering R_th(j-sp) to 25 K/W
High breakdown voltage	V_CEO = V_CBO = 300 V - enables use in 230 V AC line-connected circuits without external snubbers
Low feedback capacitance	C_re = 1.6 pF - suppresses oscillation risk in high-gain common-emitter amplifiers
Stable DC gain	h_FE ≥ 50 across 25 mA operating point - simplifies bias network design with predictable I_B

Applications

Switch-Mode Power Supply Driver

High-Voltage Amplifier Stage

Use Scenario: Driving gate of MOSFETs or IGBTs in flyback or forward converter primary side.

IC Role / Device Role / Timing Role: NPN switch providing isolated base/gate current with 300 V blocking capability.

Use Value: Eliminates need for high-voltage level-shifting ICs; leverages dual-collector thermal path for sustained 100 mA pulses.

Use Scenario: Linear amplification of sensor signals in industrial monitoring systems operating near HV rails.

IC Role / Device Role / Timing Role: Common-emitter amplifier biased at 20 V V_CE, delivering >40 dB gain up to 5 MHz.

Use Value: Low C_re prevents self-oscillation; h_FE stability ensures consistent gain across temperature.

Relay/Contactor Interface

Overvoltage Protection Circuit

Use Scenario: Directly switching 24–48 V DC coils in PLC output modules with inductive kick suppression.

IC Role / Device Role / Timing Role: High-voltage saturated switch absorbing coil energy during turn-off.

Use Value: V_CEO = 300 V withstands >100 V inductive spikes; 1.2 W rating supports 100% duty-cycle coil hold.

Use Scenario: Crowbar element in regulated HV supplies (e.g., 100–250 V outputs) triggered by overvoltage detection.

IC Role / Device Role / Timing Role: Fast-acting shunt transistor activated by comparator to short output to ground.

Use Value: Low V_CE(sat) ≤ 0.6 V minimizes power loss during fault; dual-collector layout sustains surge current.

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 = 100 V, h_FE = 100–250, SOT363 package	Limited to ≤100 V circuits; unsuitable for mains-referenced designs	Select only for low-voltage, high-gain signal switching where space is constrained
BF723	PNP complement; identical V_CEO/I_C/package but opposite polarity	Required for complementary push-pull or differential pair topologies	Use alongside BF720 in symmetrical HV output stages or level translators

Compared with BCV61B,215 and BF723, the BF720 uniquely provides 300 V blocking in SOT223 with dual-collector thermal management - making it irreplaceable in mains-connected switchers and HV protection circuits where voltage rating and power dissipation are co-critical.

Availability

BF720 is available at Aetrix Electronics and suitable for switch-mode power supply drivers, high-voltage amplifier stages, and relay/contactor interfaces requiring stable component supply and long-term industrial lifecycle support.

Supply support for BF720 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, headquartered in Nijmegen, Netherlands.

The BF720 belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for industrial power conversion, protection, and interface applications demanding 300 V standoff and robust thermal performance in compact SMD packages.

FAQ

What is the maximum continuous collector current for BF720?

The BF720 has a maximum continuous collector current (I_C) of 100 mA at ambient temperature ≤25 °C with proper PCB heatsinking. At higher temperatures or without adequate copper area, derating applies per the thermal resistance R_th(j-a) = 106 K/W. Peak current capability is 200 mA, limited by I_CM rating.

Is BF720 automotive qualified?

No, BF720 is explicitly designated as non-automotive qualified per its revision history (v.4, October 2024). It lacks AEC-Q101 qualification and is intended for industrial, commercial, and general-purpose applications only. Automotive use requires verified alternatives such as BF720-Q series parts.

How does the dual-collector pinning (Pins 2 & 4) affect PCB layout?

Pins 2 and 4 are internally connected to the same collector node and the exposed thermal pad. Both must be soldered to a shared, minimum 1 cm² copper pour on the PCB to achieve the specified R_th(j-sp) = 25 K/W. Splitting or isolating these pins degrades thermal performance and risks premature thermal failure under load.

What is the typical transition frequency (f_T) and how is it measured?

The BF720 has a typical f_T of 60 MHz, measured at V_CE = 10 V, I_C = 10 mA, f = 100 MHz, and T_amb = 25 °C. This indicates usable small-signal gain bandwidth up to ~10 MHz in practical amplifier designs, constrained by parasitic capacitances and bias conditions.

BF720,115 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):: 300 V

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

Current - Collector Cutoff (Max):: 10nA (ICBO)

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

BF720,115 FAQ

1.How can I place an order for BF720,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BF720,115 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 BF720,115 reliable?

The price and inventory of BF720,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF720,115 is usually 5 days.

3.What payment methods are accepted for BF720,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF720,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BF720,115?

BF720,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BF720,115 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 BF720,115?

For technical support, including BF720,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF720,115 requirements.

6.How does Aetrix verify that BF720,115 is sourced from the original manufacturer or authorized distributors?

All BF720,115 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 BF720,115 meets industry standards.

7.What is the process for return or replacement of BF720,115?

All BF720,115 units undergo pre-shipment inspection (PSI). If there is an issue with BF720,115, 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 BF720,115 part is unused and in its original packaging.

Return procedure for BF720,115:

1.Submit a request within 90 days.

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

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