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

Nexperia USA Inc. BC847CW,135

Name: BC847CW,135
Brand: Nexperia USA Inc.
SKU: BC847CW,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC847CW,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: BC847CW,135.pdf

Description:: TRANS NPN 45V 0.1A SOT-323

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC847CW,135 from Nexperia is a high-gain NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V V_CEO, 100 mA I_C, and h_FE = 420–800 at V_CE = 5 V / I_C = 2 mA. It serves as a low-power switching and amplification device in compact consumer and industrial signal-path circuits.

For engineers reviewing the BC847CW,135 datasheet, BC847CW,135 pinout, BC847CW,135 application, or BC847CW,135 equivalent, this part is selected for precision biasing, discrete gain staging, and logic-level interface buffering where tight h_FE distribution and SMT footprint efficiency are critical.

Technical Context

The BC847CW,135 implements a planar epitaxial NPN silicon structure optimized for stable DC current gain across temperature and bias conditions. Its h_FE binning (420–800) enables predictable base drive design in linear and saturated switching modes.

Thermal resistance R_th(j-a) is 625 K/W on FR4 PCB with standard single-sided copper, and its V_CE(sat) remains ≤400 mV at I_C = 100 mA / I_B = 5 mA - supporting efficient low-voltage switching in space-constrained layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 3.3 V/5 V rail-switching applications.
I_C	100 mA continuous - Supports load switching up to ~100 mA without derating at T_amb ≤ 25 °C.
h_FE	420–800 @ V_CE = 5 V, I_C = 2 mA - Tight gain bin enables accurate base resistor calculation for consistent turn-on behavior.
V_CE(sat)	≤400 mV @ I_C = 100 mA, I_B = 5 mA - Ensures minimal conduction loss and heat generation in saturated switch operation.
P_tot	200 mW @ T_amb ≤ 25 °C - Limits thermal rise on standard FR4 PCB; requires layout-aware power handling above 25 °C.
f_T	100 MHz @ V_CE = 5 V, I_C = 10 mA - Enables use in low-frequency RF stages and audio pre-amplifiers up to ~10 MHz.

Pinout & Package

SOT323 (SC-70) surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing leads. Optimized for reflow soldering per IPC-7095 guidelines.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal; requires current-limited drive (e.g., 1–10 kΩ series resistor) to achieve target I_C with known h_FE.
2	Emitter (E)	Reference node for bias network; connected to ground or low-impedance return path in common-emitter configurations.
3	Collector (C)	Output terminal; carries switched load current; routed with adequate trace width to manage 100 mA continuous flow.

Key Features

Feature	Design Value
High h_FE bin (420–800)	Reduces required base drive current by >2× vs. BC847BW, lowering MCU GPIO loading and enabling smaller base resistors.
SOT323 (SC-70) package	0.95 mm profile and 1.35 mm × 1.75 mm footprint saves >40% board area vs. SOT23, critical for wearables and sensor modules.
V_CE(sat) ≤ 400 mV	Minimizes power dissipation in saturation (e.g., <40 mW at 100 mA), reducing thermal stress in dense PCB layouts.
150 °C max junction temperature	Supports operation in sealed enclosures or near heat sources without derating below ambient ≤ 85 °C.

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs with current limiting via base resistor.

IC Role / Device Role / Timing Role: Discrete NPN switch providing current gain to overcome GPIO current limits (e.g., 4 mA max).

Use Value: Enables reliable LED on/off control using only one GPIO pin and one external resistor - no IC-level complexity or quiescent current overhead.

Use Scenario: Level-shifting and current boosting for interfacing 1.8 V logic outputs to 5 V peripherals.

IC Role / Device Role / Timing Role: Active pull-up switch translating low-voltage logic to higher-voltage rails with sub-100 ns propagation delay.

Use Value: Eliminates need for dedicated level translators; supports bidirectional signaling when paired with diode clamping.

Analog Sensor Signal Conditioning

Low-Power Alarm Latching

Use Scenario: Amplifying weak thermistor or photodiode signals in battery-powered environmental monitors.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias network setting DC operating point.

Use Value: Delivers 20–30 dB voltage gain at <100 µA quiescent current - extends battery life while preserving SNR.

Use Scenario: Latching momentary push-button inputs into persistent logic states for security or status indicators.

IC Role / Device Role / Timing Role: Cross-coupled pair component in bistable emitter-coupled latch topology.

Use Value: Achieves zero static power in hold state and <1 µA leakage - ideal for always-on wake-up circuits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847C,115	Same h_FE range but in SOT23 package (larger footprint, higher R_th(j-a) = 300 K/W).	Preferred where manual rework or thermal margin >2× is required; unsuitable for ultra-dense layouts.	Select when board assembly process favors SOT23 tooling or thermal headroom exceeds 100 mW.
MMBT3904LT1G	h_FE = 100–300 (lower gain), V_CEO = 40 V, same SOT23 package.	Better suited for digital switching than analog amplification due to wider h_FE spread and lower V_CEO.	Choose for cost-sensitive digital logic interfaces where gain consistency is non-critical.

Compared with BC847C,115 and MMBT3904LT1G, the BC847CW,135 delivers superior gain uniformity and smallest PCB footprint - making it optimal for miniaturized analog front-ends and high-density logic buffers where base drive predictability and space are constrained.

Availability

BC847CW,135 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, analog sensor conditioning, and low-power alarm latching requiring stable component supply and consistent h_FE performance.

Supply support for BC847CW,135 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BC847xW series targets cost-sensitive, space-constrained applications needing proven reliability and tight parametric control - especially in portable electronics and IoT edge nodes where SMT footprint and gain stability are decisive.

FAQ

Is BC847CW,135 suitable for automotive applications?

No. BC847CW,135 is not automotive-qualified per Nexperia's revision history (v.13 notes "Product changed to non-automotive qualification"). It lacks AEC-Q101 testing and is intended for industrial, consumer, and commercial use only. Automotive alternatives include BC847BQ series with -Q suffix.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms), but continuous I_B must be limited to ensure I_C ≤ 100 mA and P_tot ≤ 200 mW. At h_FE = 420, I_B ≤ 238 µA maintains I_C = 100 mA; practical designs use I_B = 1–5 mA with forced β = 20–50 for robust saturation.

How does thermal resistance change with PCB copper area?

R_th(j-a) = 625 K/W is specified for FR4 with single-sided 1 oz copper and standard SOT323 footprint. Doubling copper area reduces R_th(j-a) by ~20–25%; adding thermal vias under the pad can lower it to ~450 K/W. Full derating curves are provided in Nexperia's AN10311 application note.

Can BC847CW,135 replace BC847BW in existing designs?

Yes, with verification: BC847CW has higher h_FE (420–800 vs. 200–450), so base resistors may need reduction to avoid overdrive and excessive I_C. V_CEO, V_CE(sat), and package are identical. Confirm circuit stability under worst-case h_FE and temperature extremes before substitution.

BC847CW,135 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BC847xW

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 420 @ 2mA, 5V

Power - Max:: 200 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-323

BC847CW,135 FAQ

1.How can I place an order for BC847CW,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC847CW,135 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 BC847CW,135 reliable?

The price and inventory of BC847CW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CW,135 is usually 5 days.

3.What payment methods are accepted for BC847CW,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CW,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC847CW,135?

BC847CW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC847CW,135 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 BC847CW,135?

For technical support, including BC847CW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CW,135 requirements.

6.How does Aetrix verify that BC847CW,135 is sourced from the original manufacturer or authorized distributors?

All BC847CW,135 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 BC847CW,135 meets industry standards.

7.What is the process for return or replacement of BC847CW,135?

All BC847CW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BC847CW,135, 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 BC847CW,135 part is unused and in its original packaging.

Return procedure for BC847CW,135:

1.Submit a request within 90 days.

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

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