Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi BF720T1

Name: BF720T1
Brand: onsemi
SKU: BF720T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BF720T1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: BF720T1.pdf

Description:: TRANS NPN 100MA 300V SOT223

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,206

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BF720T1 from onsemi is an AEC−Q101-qualified NPN silicon transistor in SOT−223 package, rated for 300 V_CEO, 100 mA I_C, and 1.5 W power dissipation at T_A = 25°C. It delivers h_FE ≥ 50 at I_C = 25 mA, V_CE = 20 V, with f_T = 60 MHz and V_CE(sat) ≤ 0.6 V at I_C/I_B = 6. Used in automotive high-voltage switching circuits such as ignition drivers and fuel injector interfaces.

For engineers reviewing the BF720T1 datasheet, pinout, applications, or equivalent options, key selection considerations include its 300 V breakdown rating, AEC−Q101 qualification, SOT−223 thermal performance (R_JA = 83.3°C/W), and verified V_CE(sat) behavior across −55°C to +125°C operating range.

Technical Context

This device is a medium-voltage, medium-current NPN bipolar junction transistor optimized for linear and switching operation in automotive subsystems. Its V_(BR)CEO = 300 V, V_(BR)CBO = 300 V, and V_(BR)EBO = 5.0 V define safe operating limits under transient and steady-state bias conditions.

Designed for surface-mount reliability in engine control units, it supports stable h_FE ≥ 50 up to 125°C junction temperature and exhibits low Cre = 1.6 pF at V_CE = 30 V, enabling predictable high-frequency response in driver-stage amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	300 V - Supports switching of 24 V automotive loads with ≥10× safety margin against transients.
I_C	100 mA - Rated continuous collector current for sustained solenoid or relay coil drive.
P_D	1.5 W - Maximum power dissipation at 25°C ambient; requires thermal pad layout per CASE 318E mounting spec.
h_FE	≥50 at I_C = 25 mA - Ensures reliable base drive efficiency in low-gain interface stages.
f_T	60 MHz - Enables stable small-signal amplification up to mid-VHF band without oscillation risk.
V_CE(sat)	≤0.6 V at I_C/I_B = 6 - Minimizes conduction loss in saturated-switching applications like injector control.
R_JA	83.3°C/W - Thermal resistance measured on 1.575″ × 1.575″ PCB; dictates minimum copper area for 150°C T_J limit.

Pinout & Package

SOT−223 (TO−261), CASE 318E, 4-pin surface-mount package with exposed collector tab for thermal and electrical connection. Pin 1 = Base, Pin 2 & 4 = Collector (common), Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input requiring current-limited drive; typical I_B = 5 mA for 30 mA I_C saturation.
Pins 2 & 4	Collector	Common high-voltage output node; electrically and thermally tied to exposed metal tab.
Pin 3	Emitter	Low-side return path; referenced to ground in common-emitter configurations.

Key Features

Feature	Design Value
AEC−Q101 qualified	Validated for automotive underhood use including temperature cycling, humidity, and mechanical shock per AEC specification.
300 V breakdown rating	Enables direct replacement of legacy 200 V transistors in 24 V systems facing ISO 7637-2 pulse 5a (100 V surge).
V_CE(sat) ≤ 0.6 V	Reduces power loss by >30% vs. comparable devices with V_CE(sat) > 0.8 V at same I_C/I_B.
SOT−223 thermal design	Exposed collector tab allows 1.5 W dissipation with standard FR-4 layout; no heatsink required below 800 mW.

Applications

Engine Control Unit (ECU) Injector Driver	Automotive HVAC Blower Motor Control
Use Scenario: Switching 12–24 V fuel injectors with PWM duty cycles up to 95% and peak currents ≤100 mA. IC Role / Device Role / Timing Role: High-voltage NPN switch providing low-loss saturated conduction and fast turn-off via base discharge path. Use Value: V_(BR)CEO = 300 V prevents avalanche failure during inductive kickback; R_JA = 83.3°C/W ensures <125°C junction rise at 1 W dissipation.	Use Scenario: Controlling brushed DC blower motors in climate control modules with variable speed feedback. IC Role / Device Role / Timing Role: Linear or PWM-controlled current source regulating motor current up to 100 mA. Use Value: Stable h_FE ≥ 50 across −40°C to +125°C enables consistent gain matching in closed-loop current regulation.
Onboard Charger Pre-Regulator Stage	Industrial Solenoid Interface Module
Use Scenario: Voltage-clamped pre-regulation in 400 V EV onboard chargers, stepping down auxiliary rail voltages. IC Role / Device Role / Timing Role: Medium-voltage series pass element in discrete LDO-like topology. Use Value: V_(BR)CER = 300 V with R_BE = 2.7 kΩ ensures safe operation under load dump conditions up to 250 V.	Use Scenario: Driving 24 V industrial solenoids in PLC I/O modules with field-wire protection requirements. IC Role / Device Role / Timing Role: High-reliability switching element interfacing microcontroller GPIO to inductive load. Use Value: AEC−Q101 qualification provides proven robustness against vibration, thermal cycling, and ESD in factory environments.

Engine Control Unit (ECU) Injector Driver

Automotive HVAC Blower Motor Control

Use Scenario: Switching 12–24 V fuel injectors with PWM duty cycles up to 95% and peak currents ≤100 mA.

IC Role / Device Role / Timing Role: High-voltage NPN switch providing low-loss saturated conduction and fast turn-off via base discharge path.

Use Value: V_(BR)CEO = 300 V prevents avalanche failure during inductive kickback; R_JA = 83.3°C/W ensures <125°C junction rise at 1 W dissipation.

Use Scenario: Controlling brushed DC blower motors in climate control modules with variable speed feedback.

IC Role / Device Role / Timing Role: Linear or PWM-controlled current source regulating motor current up to 100 mA.

Use Value: Stable h_FE ≥ 50 across −40°C to +125°C enables consistent gain matching in closed-loop current regulation.

Onboard Charger Pre-Regulator Stage

Industrial Solenoid Interface Module

Use Scenario: Voltage-clamped pre-regulation in 400 V EV onboard chargers, stepping down auxiliary rail voltages.

IC Role / Device Role / Timing Role: Medium-voltage series pass element in discrete LDO-like topology.

Use Value: V_(BR)CER = 300 V with R_BE = 2.7 kΩ ensures safe operation under load dump conditions up to 250 V.

Use Scenario: Driving 24 V industrial solenoids in PLC I/O modules with field-wire protection requirements.

IC Role / Device Role / Timing Role: High-reliability switching element interfacing microcontroller GPIO to inductive load.

Use Value: AEC−Q101 qualification provides proven robustness against vibration, thermal cycling, and ESD in factory environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX653	V_CEO = 300 V, I_C = 1 A, h_FE = 100–600 - higher current rating but larger SOT-89 package.	Not suitable for space-constrained SOT−223 layouts; better for higher-power solenoid drivers.	Select ZTX653 only when >100 mA continuous current or >2 W dissipation is required.
MJD122G	V_CEO = 100 V, I_C = 3 A, TO-252 package - lower voltage rating, higher current, different footprint.	Cannot replace BF720T1 in 24 V systems with >100 V transients; requires PCB redesign.	Choose MJD122G only for non-automotive 24 V applications with strict cost constraints and no surge immunity requirement.

Compared with ZTX653 and MJD122G, the BF720T1 uniquely balances 300 V capability, AEC−Q101 compliance, and SOT−223 thermal performance in a single-source automotive-qualified part-making it irreplaceable where both voltage margin and qualification are mandatory.

Availability

BF720T1 is available at Aetrix Electronics and suitable for automotive engine management, HVAC control, and industrial solenoid interface applications requiring stable component supply and long-term lifecycle support.

Supply support for BF720T1 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BF720T1 belongs to onsemi's automotive-qualified discrete transistor portfolio, engineered specifically for high-reliability switching in engine control, body electronics, and powertrain subsystems.

FAQ

Is the BF720T1 RoHS compliant and halogen-free?

Yes, the BF720T1 is Pb−Free, Halogen Free/BFR Free, and RoHS compliant per onsemi's documentation. This compliance is confirmed in the official datasheet (Rev. 9, December 2024) and applies to the BF720T1G variant supplied in SOT−223 tape-and-reel packaging. The BF720T1 meets EU Directive 2011/65/EU and associated amendments, and all materials declarations are traceable through onsemi's component database. BF720T1 remains fully compliant under current regulatory frameworks.

What is the maximum junction temperature rating for the BF720T1?

The BF720T1 has a maximum junction temperature (T_J) rating of 150°C, as specified in the Absolute Maximum Ratings table of the official datasheet. This rating is valid under proper PCB thermal design per CASE 318E mounting guidelines - including use of the exposed collector pad and recommended 0.93 in² copper area. Operation above 150°C risks permanent degradation of h_FE and increased leakage current. BF720T1 maintains functional stability up to this limit when derated according to R_JA = 83.3°C/W.

Does the BF720T1 support operation at −55°C ambient temperature?

Yes, the BF720T1 is characterized and guaranteed to operate from −55°C to +150°C junction temperature. Electrical characteristics including h_FE, V_CE(sat), and V_BE(sat) are specified across this full range in Figure 4 of the datasheet. At −55°C, V_CE(sat) remains ≤ 0.6 V and h_FE stays ≥ 30, supporting cold-cranking automotive functions. BF720T1's AEC−Q101 qualification includes extended temperature cycling validation, confirming reliability under these extremes.

What is the meaning of "S Prefix" in SBF720T1G, and how does it relate to BF720T1?

The "S" prefix in SBF720T1G denotes an automotive-grade ordering option with unique site and control change requirements - distinct from standard BF720T1G. Both share identical electrical specs and SOT−223 packaging, but SBF720T1G undergoes additional PPAP documentation and process controls per automotive quality standards. BF720T1 is the base part number; SBF720T1G is its automotive-qualified derivative. For new designs targeting IATF 16949 compliance, SBF720T1G is the recommended variant.

Is the BF720T1 still in active production, or is it discontinued?

The BF720T1 is marked "DISCONTINUED (Note 1)" in the official onsemi datasheet (Rev. 9, December 2024), indicating it is not recommended for new designs. However, Aetrix Electronics maintains active inventory and supports legacy program continuity. Obsolescence mitigation includes cross-reference guidance, last-time-buy planning, and access to remaining manufacturer stock. BF720T1 remains available for repair, maintenance, and existing production runs with documented lifecycle coordination.

BF720T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

BF720T1 FAQ

1.How can I place an order for BF720T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BF720T1 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 BF720T1 reliable?

The price and inventory of BF720T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BF720T1 is usually 5 days.

3.What payment methods are accepted for BF720T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BF720T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BF720T1?

BF720T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BF720T1 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 BF720T1?

For technical support, including BF720T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BF720T1 requirements.

6.How does Aetrix verify that BF720T1 is sourced from the original manufacturer or authorized distributors?

All BF720T1 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 BF720T1 meets industry standards.

7.What is the process for return or replacement of BF720T1?

All BF720T1 units undergo pre-shipment inspection (PSI). If there is an issue with BF720T1, 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 BF720T1 part is unused and in its original packaging.

Return procedure for BF720T1:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…