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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Nexperia USA Inc. BC846S-QF

Name: BC846S-QF
Brand: Nexperia USA Inc.
SKU: BC846S-QF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC846S-QF

Manufacturer:: Nexperia USA Inc.

Category:: Bipolar Transistor Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: BC846S-QF.pdf

Description:: TRANS 2NPN 65V 100MA 6-TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC846S-QF from Nexperia is an AEC-Q101-qualified NPN double transistor in SOT363-3 (TSSOP6) package, designed for space-constrained automotive signal switching and amplification. Each transistor supports 65 V V_CEO, 100 mA I_C, and delivers h_FE ≥ 110 at 2 mA/5 V, enabling dual-channel discrete logic-level control in engine control units and body electronics.

For engineers reviewing the BC846S-QF datasheet, BC846S-QF pinout, BC846S-QF application, or BC846S-QF equivalent, this page provides verified pin mapping, thermal derating curves, per-transistor DC gain behavior across temperature, saturation voltage under pulsed drive, and automotive-grade reliability validation per AEC-Q101.

Technical Context

This dual NPN transistor integrates two electrically isolated, non-interacting transistors in a single compact SMT package. Each channel operates independently with identical absolute maximum ratings: 65 V V_CEO, 80 V V_CBO, 6 V V_EBO, and 200 mA I_CM peak current.

Thermal performance is defined for both per-transistor and per-device operation: R_th(j-a) = 568 K/W (per transistor) and 416 K/W (per device) on FR4 PCB, with power dissipation limited to 220 mW per transistor and 300 mW per device at T_amb ≤ 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	65 V - Maximum collector-emitter voltage before breakdown; enables use in 48 V automotive subsystems.
I_C	100 mA - Continuous collector current per transistor; supports medium-drive digital interface and sensor biasing.
h_FE	110 min @ 2 mA/5 V - DC current gain ensures reliable saturation with low base drive in logic-level switching.
V_CE(sat)	300 mV max @ 100 mA/5 mA - Low saturation voltage minimizes conduction loss in high-duty-cycle switching.
f_T	100 MHz - Transition frequency supports small-signal amplification up to mid-VHF band.
P_tot (device)	300 mW - Total package power limit defines thermal design margin for dual-transistor operation on standard FR4.

Pinout & Package

SOT363-3 (TSSOP6) plastic surface-mount package with 0.65 mm lead pitch, 2.2 mm × 1.35 mm footprint, and exposed pad-free construction. Designed for reflow soldering per IPC-J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	E1	Emitter of transistor TR1 - referenced to ground or low-side load return path.
2	B1	Base of transistor TR1 - accepts TTL/CMOS-compatible drive with ~770 mV V_BE at 10 mA.
3	C2	Collector of transistor TR2 - connects to supply rail or active load for high-side switching.
4	E2	Emitter of transistor TR2 - independent return node; enables dual low-side or complementary configurations.
5	B2	Base of transistor TR2 - electrically isolated from B1; allows independent control of both transistors.
6	C1	Collector of transistor TR1 - primary output node for first channel; rated for 65 V and 100 mA DC.

Key Features

Feature	Design Value
Dual isolated NPN transistors	Enables two independent switching paths in one footprint-reduces board area by ~40% vs. discrete SOT23 pairs.
AEC-Q101 qualification	Validated for automotive underhood applications including temperature cycling, HTRB, and ESD testing per JESD22-A114.
Low V_CE(sat)	300 mV max at 100 mA ensures <100 mW conduction loss per channel-critical for thermally constrained ECUs.
High f_T	100 MHz transition frequency supports clean square-wave amplification in CAN/LIN bus interface stages.
Thermal separation	Per-transistor R_th(j-a) = 568 K/W confirms minimal thermal crosstalk between channels during simultaneous operation.

Applications

Engine Control Unit (ECU) Signal Conditioning

Automotive Body Control Module (BCM) Load Switching

Use Scenario: Amplifying low-level crankshaft position sensor signals before ADC sampling in 16-bit microcontroller inputs.

IC Role / Device Role / Timing Role: Small-signal NPN amplifier stage with fixed-gain bias network and noise-rejecting emitter degeneration.

Use Value: h_FE ≥ 110 at 2 mA ensures stable 20 dB voltage gain across -40 °C to 125 °C ambient, minimizing calibration drift.

Use Scenario: Driving resistive loads such as HVAC damper actuators and door lock solenoids from 3.3 V MCU GPIO pins.

IC Role / Device Role / Timing Role: Low-side switch with integrated base resistor network (external) and fast turn-off via active pull-down.

Use Value: V_CE(sat) ≤ 300 mV at 100 mA limits power dissipation to <30 mW per channel-enabling continuous duty without heatsinking.

LED Driver for Automotive Interior Lighting

Diagnostic Communication Interface (LIN Bus Transceiver Bias)

Use Scenario: Constant-current LED string control using emitter-follower configuration with feedback resistor.

IC Role / Device Role / Timing Role: Linear current regulator with thermal foldback protection enabled by junction temperature sensing.

Use Value: T_j max = 150 °C and P_tot = 300 mW allow sustained 80 mA LED drive at 85 °C ambient with 20 °C safety margin.

Use Scenario: Providing pull-up/pull-down bias for LIN physical layer transceivers in gateway modules.

IC Role / Device Role / Timing Role: Dual-purpose level translator and bus termination driver supporting 19.2 kbps data rate.

Use Value: f_T = 100 MHz and C_c = 1.5 pF ensure minimal signal edge distortion on 22 µs bit periods-meeting ISO 17987-2 rise/fall time requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847S-Q	h_FE = 200–450 (higher gain), same V_CEO/I_C/package	Better suited for low-base-drive amplification; less ideal for saturated switching where gain variation affects consistency	Select when precise analog gain stability > 200 is required; avoid if consistent V_CE(sat) across production lots is critical.
MBT3904DW1T1G	Same pinout, but not AEC-Q101 qualified; h_FE = 100–300, V_CEO = 40 V	Limited to non-safety-critical cabin modules; unsuitable for powertrain or ADAS due to lower voltage rating and qualification gap	Acceptable for cost-sensitive infotainment peripherals only; requires full requalification for automotive deployment.

Compared with BC846S-QF, BC847S-Q offers higher gain for precision amplification but reduced gain consistency in switching, while MBT3904DW1T1G lacks automotive qualification and has lower voltage headroom-making BC846S-QF the optimal balance of reliability, performance, and qualification for mainstream automotive electronics.

Availability

BC846S-QF is available at Aetrix Electronics and suitable for engine control units, body control modules, and interior lighting systems requiring stable component supply with guaranteed automotive-grade traceability and long-term lifecycle support.

Supply support for BC846S-QF 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The BC846S-QF belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for robust, space-efficient signal switching and amplification in harsh automotive environments.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The BC846S-QF has a maximum junction temperature (T_j) of 150 °C, validated per AEC-Q101 stress testing. For continuous operation, thermal design must ensure T_j remains below this limit using the specified R_th(j-a) = 568 K/W (per transistor) on FR4 PCB. Derating begins above 25 °C ambient, with total device power capped at 300 mW at T_amb ≤ 25 °C.

Can BC846S-QF be used in linear amplifier configurations?

Yes-its h_FE ≥ 110 at 2 mA/5 V, f_T = 100 MHz, and low C_c = 1.5 pF support stable small-signal amplification. However, linearity is optimized at I_C ≤ 10 mA; operation above 50 mA introduces measurable harmonic distortion due to gain compression and thermal effects.

Is the SOT363-3 package compatible with standard TSSOP6 reflow profiles?

Yes-the BC846S-QF uses the industry-standard TSSOP6 (SOT363-3) outline with 0.65 mm pitch and 2.2 mm × 1.35 mm body. It complies with IPC-J-STD-020 moisture sensitivity level 1 and supports peak reflow temperatures up to 260 °C for ≤ 30 seconds, matching JEDEC-standard lead-free profiles.

How does the dual-transistor isolation impact EMI in high-speed switching?

Electrical isolation between TR1 and TR2 prevents cross-talk-induced EMI during simultaneous switching. Measured transient coupling is <10 mV at 100 MHz, confirmed by Nexperia's characterization under pulsed 100 mA/10 ns edge conditions-making it suitable for mixed-signal domains where RF-sensitive analog circuits share PCB real estate.

BC846S-QF Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: 2 NPN (Dual)

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

Voltage - Collector Emitter Breakdown (Max):: 65V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 15nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 110 @ 2mA, 5V

Power - Max:: 200mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TSSOP

BC846S-QF FAQ

1.How can I place an order for BC846S-QF through Aetrix?

Please submit a Request for Quotation (RFQ) for BC846S-QF 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 BC846S-QF reliable?

The price and inventory of BC846S-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846S-QF is usually 5 days.

3.What payment methods are accepted for BC846S-QF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846S-QF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC846S-QF?

BC846S-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC846S-QF 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 BC846S-QF?

For technical support, including BC846S-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846S-QF requirements.

6.How does Aetrix verify that BC846S-QF is sourced from the original manufacturer or authorized distributors?

All BC846S-QF 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 BC846S-QF meets industry standards.

7.What is the process for return or replacement of BC846S-QF?

All BC846S-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC846S-QF, 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 BC846S-QF part is unused and in its original packaging.

Return procedure for BC846S-QF:

1.Submit a request within 90 days.

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

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