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

Nexperia USA Inc. BFS19,215

Name: BFS19,215
Brand: Nexperia USA Inc.
SKU: BFS19,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BFS19,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BFS19,215.pdf

Description:: TRANS NPN 20V 0.03A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:4,810

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Product details

Overview

BFS19,215 from Nexperia is an NPN medium-frequency transistor in SOT23 package, rated for V_CEO = 20 V, I_C(max) = 30 mA, and f_T = 260 MHz, designed for signal amplification and switching in thin-film RF front-ends and IF stages of consumer audio/video receivers.

For engineers reviewing the BFS19,215 datasheet, BFS19,215 pinout, BFS19,215 application, or BFS19,215 equivalent, this page delivers verified DC gain (h_FE = 65–225 at I_C = 1 mA), thermal resistance (R_th(j-a) = 500 K/W), collector capacitance (C_c = 1 pF), and absolute maximum ratings per IEC 60134.

Technical Context

The BFS19,215 operates as a general-purpose NPN bipolar junction transistor optimized for medium-frequency analog signal paths. Its h_FE variation (65–225) supports consistent biasing across production lots, while low C_c (1 pF) and C_re (0.85 pF) minimize Miller effect in tuned amplifier stages.

Designed for surface-mount use on FR4 PCBs, it delivers stable performance up to 150 °C junction temperature with P_tot = 250 mW at T_amb ≤ 25 °C. The device exhibits low leakage: I_CBO ≤ 100 nA at 20 V and 25 °C, rising to 10 µA at 100 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	20 V - Maximum safe collector-emitter voltage under open-base condition; defines headroom for small-signal amplifiers.
f_T	260 MHz - Transition frequency at I_C = 1 mA, V_CE = 10 V; enables stable gain in VHF IF stages up to ~100 MHz.
h_FE	65–225 - DC current gain range at I_C = 1 mA, V_CE = 10 V; allows predictable bias design without individual binning.
C_c	1 pF - Collector capacitance at V_CB = 10 V, f = 1 MHz; limits high-frequency roll-off and stabilizes impedance matching.
R_th(j-a)	500 K/W - Junction-to-ambient thermal resistance on FR4 board; determines allowable power dissipation in non-heatsinked layouts.
I_CBO	≤100 nA - Collector cut-off current at V_CB = 20 V, 25 °C; ensures low standby leakage in battery-powered signal chains.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package, 3-lead, dimensions per JEDEC MS-012AA: body size 2.9 × 1.3 × 1.0 mm, lead pitch 1.9 mm, tape-and-reel packaging per EIA-481-D.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires series resistor for stable biasing due to h_FE spread.
2	Emiter	Common reference terminal for emitter-grounded configurations; connects directly to PCB ground plane for minimal inductance.
3	Collector	Output current sink node; routed with controlled impedance trace when used in RF amplifiers to avoid parasitic resonance.

Key Features

Feature	Design Value
Medium-frequency optimization	f_T = 260 MHz with low C_c/C_re ensures usable gain bandwidth in 30–100 MHz IF stages without neutralization.
Wide h_FE range	65–225 at 1 mA enables single-binning designs across production, reducing test complexity in high-volume consumer assemblies.
Low leakage at elevated temperature	I_CBO ≤ 10 µA at 100 °C maintains signal integrity in thermally stressed environments like enclosed AV receivers.
FR4-compatible thermal performance	R_th(j-a) = 500 K/W allows 250 mW operation without heatsinking on standard 1-oz copper PCBs.

Applications

FM/AM Radio IF Amplifier

Portable Audio Preamp Stage

Use Scenario: Amplifying 10.7 MHz FM IF signals in compact portable radios with minimal external components.

IC Role / Device Role / Timing Role: NPN common-emitter amplifier providing 15–20 dB voltage gain with matched input/output impedance.

Use Value: Low C_c (1 pF) prevents self-oscillation at IF frequency; h_FE consistency eliminates need for gain-trimming resistors.

Use Scenario: Boosting line-level audio signals before ADC input in battery-powered voice recorders.

IC Role / Device Role / Timing Role: Low-noise preamplifier stage operating at I_C = 0.5–2 mA with V_CE = 5–8 V DC bias.

Use Value: V_CEO = 20 V provides ample headroom for transient peaks; I_CBO ≤ 100 nA minimizes DC offset drift over time.

TV Tuner Front-End

Thin-Film Oscillator Core

Use Scenario: First-stage amplification in analog TV tuner modules handling 45–470 MHz VHF/UHF bands.

IC Role / Device Role / Timing Role: Medium-frequency active load in cascode or tuned-collector configuration.

Use Value: f_T = 260 MHz supports stable gain up to third harmonic of 100 MHz carriers; SOT23 footprint enables dense layout.

Use Scenario: Active element in Colpitts or Clapp oscillator circuits for local oscillator generation in set-top boxes.

IC Role / Device Role / Timing Role: Switching/transconductance element sustaining oscillation at 50–150 MHz.

Use Value: Low C_re (0.85 pF) reduces phase shift uncertainty; V_CEO rating accommodates tank circuit swing.

Availability

BFS19,215 is available at Aetrix Electronics and suitable for FM radio IF amplifiers, portable audio preamps, TV tuner front-ends, and thin-film oscillator cores requiring stable component supply across industrial and consumer production cycles.

Supply support for BFS19,215 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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

The BFS19,215 belongs to Nexperia's legacy NPN RF transistor product line, engineered specifically for cost-sensitive, medium-frequency analog signal conditioning in space-constrained consumer electronics.

FAQ

Is BFS19,215 RoHS compliant and halogen-free?

Yes. BFS19,215 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia standard Q60001, confirmed in the official product change notice PCN-2017-001 issued after the Nexperia spin-off. Lead finish is matte tin, and all materials comply with IEC 61249-2-21.

What is the recommended PCB pad layout for SOT23 mounting?

Nexperia recommends a land pattern per IPC-7351B nominal density: 0.95 mm pad length, 1.2 mm pad width, 1.9 mm center-to-center spacing, with 0.3 mm solder mask opening. Thermal relief on the emitter pad improves reflow uniformity and reduces tombstoning risk during automated assembly.

Can BFS19,215 replace BC847 in existing designs?

No. While both are SOT23 NPN transistors, BC847 has higher h_FE (110–800) and lower V_CEO (45 V), making it unsuitable for 20 V–rated BFS19 applications. BFS19's 260 MHz f_T and tighter C_c spec target distinct medium-frequency roles where BC847's broadband noise profile is less optimal.

Does BFS19,215 require external base bias stabilization?

Yes. Due to its wide h_FE range (65–225), fixed-base bias networks may cause significant I_C variation across units. Nexperia recommends emitter-degeneration (e.g., 100 Ω–1 kΩ resistor) or voltage-divider bias with bypassed emitter resistor to maintain ±10% collector current tolerance in production.

BFS19,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 30 mA

Voltage - Collector Emitter Breakdown (Max):: 20 V

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 65 @ 1mA, 10V

Power - Max:: 250 mW

Frequency - Transition:: 260MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BFS19,215 FAQ

1.How can I place an order for BFS19,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BFS19,215 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 BFS19,215 reliable?

The price and inventory of BFS19,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BFS19,215 is usually 5 days.

3.What payment methods are accepted for BFS19,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BFS19,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BFS19,215?

BFS19,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BFS19,215 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 BFS19,215?

For technical support, including BFS19,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BFS19,215 requirements.

6.How does Aetrix verify that BFS19,215 is sourced from the original manufacturer or authorized distributors?

All BFS19,215 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 BFS19,215 meets industry standards.

7.What is the process for return or replacement of BFS19,215?

All BFS19,215 units undergo pre-shipment inspection (PSI). If there is an issue with BFS19,215, 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 BFS19,215 part is unused and in its original packaging.

Return procedure for BFS19,215:

1.Submit a request within 90 days.

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

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