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

Infineon Technologies BC817-16W

Name: BC817-16W
Brand: Infineon Technologies
SKU: BC817-16W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC817-16W

Manufacturer:: Infineon Technologies

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: BC817-16W.pdf

Description:: BIPOLAR GEN PURPOSE TRANSISTOR

Quantity:: RFQ Add To RFQ list

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Inventory:207,000

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Product details

Overview

BC817-16W from Nexperia (formerly Philips Semiconductors) is an NPN general-purpose bipolar junction transistor in SOT323 (SC-70) package, rated for 45 V V_CEO, 500 mA I_C, and DC current gain (h_FE) of 100–250 at I_C = 100 mA, V_CE = 1 V. It serves as a low-voltage switching and linear amplification device in compact consumer and industrial PCBs.

For engineers reviewing the BC817-16W datasheet, BC817-16W pinout, BC817-16W application, or BC817-16W equivalent, key selection criteria include its SOT323 footprint compatibility, guaranteed h_FE range, V_CE(sat) ≤ 700 mV at I_C = 500 mA/I_B = 50 mA, thermal resistance of 625 K/W, and JEDEC SC-70 standardization.

Technical Context

The BC817-16W operates as a silicon NPN BJT with base-controlled current amplification. Its h_FE bin (-16) guarantees minimum 100 and maximum 250 at 100 mA collector current and 1 V collector-emitter voltage, enabling predictable biasing in discrete amplifier and switch stages.

It features V_CEO = 45 V, V_CBO = 50 V, and V_EBO = 5 V - defining safe operating limits for low-to-mid voltage logic-level interfacing and signal conditioning. Thermal performance is characterized by R_th(j-a) = 625 K/W on FR4, limiting continuous power dissipation to 200 mW at T_amb ≤ 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown under open-base condition; sets upper rail limit for switching applications.
I_C (DC)	500 mA - Continuous collector current rating; defines max steady-state load drive capability.
h_FE	100–250 - DC current gain at I_C = 100 mA, V_CE = 1 V; enables stable bias design in Class-A amplifiers and saturated switches.
V_CE(sat)	≤ 700 mV at I_C = 500 mA, I_B = 50 mA - Low saturation voltage reduces conduction loss in digital switching circuits.
P_tot	200 mW at T_amb ≤ 25 °C - Total power dissipation limit on FR4 PCB; constrains thermal layout for high-duty-cycle operation.
f_T	100 MHz - Transition frequency at I_C = 10 mA, V_CE = 5 V; supports audio-frequency amplification and fast digital edge handling.

Pinout & Package

SOT323 (SC-70) is a 3-pin, surface-mount plastic package measuring 2.1 mm × 1.25 mm × 0.95 mm, optimized for high-density PCB layouts and reflow assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input terminal; requires ~50 mA base drive for full 500 mA collector saturation.
2	Emitter	Reference node for bias network; connected to ground or common return in low-side switch configurations.
3	Collector	Output current path; handles up to 500 mA DC load current with ≤700 mV drop when saturated.

Key Features

Feature	Design Value
Guaranteed h_FE bin (-16)	100–250 range ensures consistent gain across production lots for reliable bias point setting.
Low V_CE(sat)	≤700 mV at rated I_C/I_B minimizes power loss and self-heating in switching mode.
JEDEC SC-70 compliance	Standardized footprint enables drop-in replacement and automated pick-and-place compatibility.
High f_T	100 MHz transition frequency supports stable operation up to mid-audio frequencies without phase inversion.

Applications

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: Low-side switch controlled by MCU GPIO pin via current-limiting base resistor.

Use Value: V_CE(sat) ≤ 700 mV ensures >95% LED forward voltage utilization and minimal heat generation at 20 mA.

Use Scenario: Amplifying weak analog sensor signals (e.g., thermistor divider output) before ADC sampling.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed bias network.

Use Value: h_FE = 100–250 allows precise gain control using standard 1% resistors; f_T = 100 MHz avoids bandwidth limitation below 20 kHz.

Power Supply Enable Switch

Relay Coil Driver

Use Scenario: Enabling/disabling 12 V auxiliary rails in embedded power management systems.

IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by PMIC or supervisor IC.

Use Value: V_CEO = 45 V provides 3.5× margin over 12 V rail, ensuring long-term reliability under transients.

Use Scenario: Driving 50–100 mA relay coils in industrial I/O modules.

IC Role / Device Role / Timing Role: Saturated switch with flyback diode protection.

Use Value: I_C = 500 mA rating accommodates relay inrush current; low V_CE(sat) reduces coil heating during hold state.

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
BC847BW	Lower I_C = 100 mA, higher h_FE = 200–450, same SOT323 package	Not suitable for >100 mA loads; better for low-current signal amplification	Select only if load current ≤100 mA and higher gain stability is required.
MMBT3904LT1G	Same I_C = 200 mA (max), V_CEO = 40 V, h_FE = 100–300, SOT23 package	Lower voltage rating and different footprint; requires PCB redesign	Choose only when SOT23 is preferred and 40 V rating suffices for the system.

Compared with BC847BW and MMBT3904LT1G, BC817-16W uniquely balances 500 mA current handling, 45 V breakdown, and SOT323 compactness-making it optimal for space-constrained 12–24 V switching where both current and voltage margins matter.

Availability

BC817-16W is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, power supply enable switches, and relay coil drivers requiring stable component supply and JEDEC-standardized SOT323 packaging.

Supply support for BC817-16W 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions rooted in Philips' legacy of analog innovation.

The BC817 series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, robust switching and amplification in consumer, industrial, and automotive-qualified applications.

FAQ

What is the maximum continuous collector current for BC817-16W?

The BC817-16W is rated for 500 mA DC collector current under standard FR4 PCB conditions at ambient temperature ≤25 °C. Derating is required above 25 °C per its thermal resistance of 625 K/W; at 70 °C ambient, max I_C drops to approximately 320 mA to maintain junction temperature ≤150 °C.

Is BC817-16W pin-compatible with BC847BW?

Yes - both use identical SOT323 (SC-70) package with base-emitter-collector pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector). However, BC847BW has lower I_C (100 mA) and higher h_FE (200–450), so electrical substitution requires verification of current and gain requirements.

Does BC817-16W support pulsed operation beyond its DC ratings?

Yes - the datasheet specifies peak collector current I_CM = 1 A under pulse conditions (t_p ≤ 300 µs, duty cycle δ ≤ 0.02). This enables short-duration surge handling, such as relay coil inrush or capacitor charging, provided average power remains within 200 mW limits.

What marking code identifies BC817-16W on the device body?

BC817-16W is marked with "6A" followed by a country-of-origin code: "6A-" (Hong Kong), "6Ap" (Hong Kong), "6At" (Malaysia), or "6AW" (China). The "W" suffix in the type number and marking confirms SOT323 packaging per Philips/Nexperia ordering conventions.

BC817-16W Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

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:: -

BC817-16W FAQ

1.How can I place an order for BC817-16W through Aetrix?

Please submit a Request for Quotation (RFQ) for BC817-16W 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 BC817-16W reliable?

The price and inventory of BC817-16W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-16W is usually 5 days.

3.What payment methods are accepted for BC817-16W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-16W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC817-16W?

BC817-16W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC817-16W 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 BC817-16W?

For technical support, including BC817-16W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-16W requirements.

6.How does Aetrix verify that BC817-16W is sourced from the original manufacturer or authorized distributors?

All BC817-16W 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 BC817-16W meets industry standards.

7.What is the process for return or replacement of BC817-16W?

All BC817-16W units undergo pre-shipment inspection (PSI). If there is an issue with BC817-16W, 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 BC817-16W part is unused and in its original packaging.

Return procedure for BC817-16W:

1.Submit a request within 90 days.

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

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