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Nexperia USA Inc. BC817W,115
- Part No.:
- BC817W,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC817W,115.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:28,698
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Product details
Overview
BC817W,115 from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT323 (SC-70) package, designed for low-voltage switching and linear amplification in space-constrained PCBs. It delivers DC current gain (hFE) of 100–600 at VCE = 1 V, IC = 100 mA, with VCE(sat) ≤ 700 mV at IC = 500 mA / IB = 50 mA, and operates across –65 °C to +150 °C ambient.
For engineers reviewing the BC817W,115 datasheet, BC817W,115 pinout, BC817W,115 application, or BC817W,115 equivalent, this discrete NPN transistor supports precise current control in power management stages, signal buffering in sensor interfaces, and load switching in industrial I/O modules - requiring verified hFE spread, thermal derating behavior, and SC-70 footprint compatibility.
Technical Context
The BC817W,115 operates as a silicon planar epitaxial NPN transistor with open-base collector-emitter breakdown voltage (VCEO) rated at 45 V and peak collector current (ICM) up to 1 A for single pulses ≤1 ms. Its base-emitter saturation voltage (VBE(sat)) remains ≤1.2 V at IC = 500 mA, enabling efficient drive from 3.3 V or 5 V logic sources.
Thermal performance is defined by Rth(j-a) = 625 K/W on standard FR4 (single-sided copper, tin-plated), dropping to 431 K/W with a 1 cm² collector pad. The device exhibits fT = 100 MHz at VCE = 5 V, IC = 10 mA, supporting moderate-frequency amplification and switching up to ~10 MHz in practical layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage under open-base conditions; defines upper rail limit in switch-mode operation. |
| IC | 500 mA continuous - Rated DC collector current at 25 °C ambient; derates linearly above 25 °C per Fig. 1. |
| hFE | 100–600 - DC current gain range at VCE = 1 V, IC = 100 mA; enables predictable base drive sizing across production lots. |
| VCE(sat) | ≤700 mV - Collector-emitter saturation voltage at IC = 500 mA / IB = 50 mA; ensures <1.5 W conduction loss in 5 V loads. |
| Ptot | 290 mW - Max power dissipation with 1 cm² collector pad on FR4; sets thermal ceiling for sustained 500 mA operation. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; supports small-signal amplification up to mid-VHF band. |
| Cc | 3 pF - Collector capacitance at VCB = 10 V; limits high-frequency Miller effect in switching nodes. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm height, optimized for automated reflow assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal accepting 5–50 mA base current to saturate or cut off the transistor; requires series resistor for TTL/CMOS drive. |
| 2 | Emitter (E) | Current return path tied to ground or low-side reference; connects directly to PCB ground plane for thermal and noise control. |
| 3 | Collector (C) | High-current output node handling up to 500 mA; routed over thermal pad area to dissipate heat into copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE variants | BC817W (100–600), BC817-16W (100–250), BC817-25W (160–400), BC817-40W (250–600) - Enables precise gain matching without external feedback components. |
| Low VCE(sat) | ≤700 mV at full 500 mA load - Reduces conduction loss in battery-powered switches and improves efficiency in 3.3 V/5 V logic-level driven circuits. |
| High fT | 100 MHz - Supports clean square-wave switching and analog amplification in signal conditioning paths up to 10 MHz. |
| Robust thermal rating | Tj = 150 °C max, Tamb = –65 °C to +150 °C - Ensures reliable operation in automotive under-hood, industrial control, and outdoor equipment environments. |
Applications
| Industrial Sensor Interface | USB-C Power Switching |
|---|---|
Use Scenario: Amplifying low-level analog signals from RTD or thermistor bridges before ADC sampling in PLC analog input modules. IC Role / Device Role / Timing Role: Linear amplifier configured in common-emitter topology with emitter degeneration for stable gain and temperature compensation. Use Value: hFE consistency across –40 °C to +85 °C enables ±0.5% gain drift control; low Cc prevents phase shift in 10 kHz bandwidth paths. |
Use Scenario: Enabling/disabling 5 V USB-C power delivery paths in portable docking stations using microcontroller GPIO. IC Role / Device Role / Timing Role: Low-side switch controlling VBUS enable line with fast turn-on (<100 ns) and minimal shoot-through risk. Use Value: VCE(sat) ≤700 mV ensures <3.5 mW loss at 5 mA control current; SOT323 footprint saves board space vs. SO-23. |
| IoT Node Load Control | Automated Test Equipment (ATE) Signal Gating |
Use Scenario: Driving LED status indicators and small solenoids in battery-operated smart meters and environmental monitors. IC Role / Device Role / Timing Role: Digital switch operating in saturation mode with fixed base resistor, toggled by ARM Cortex-M0+ GPIO. Use Value: 500 mA IC rating supports 3× typical LED string current; 1 A ICM handles inrush during solenoid pull-in. |
Use Scenario: Gating precision analog test signals (±10 V, 100 kHz) between DUT and measurement circuitry in benchtop ATE systems. IC Role / Device Role / Timing Role: High-isolation switch in emitter-follower configuration to buffer source impedance without loading signal path. Use Value: VCEO = 45 V exceeds 10 V test rails with margin; fT = 100 MHz preserves signal integrity up to third harmonic. |
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,115 | Lower VCEO (45 V same), lower IC (100 mA), higher hFE (200–450), smaller SOT323 footprint identical | Not suitable for >100 mA loads; better for signal amplification than power switching | Select when gain stability at low currents (1–10 mA) is prioritized over load current capability. |
| MMBT3904LT1G | Same VCEO (40 V), same IC (200 mA), hFE 100–300, SOT23 package (larger footprint, higher Rth(j-a)) | Requires larger PCB area; thermal resistance 500 K/W vs. 625 K/W limits sustained 200 mA use | Choose only if SOT23 is already standardized in design; avoid for new 500 mA applications due to package limitation. |
Compared with BC817W,115, BC847BW,115 trades current capacity for tighter hFE control at low bias, while MMBT3904LT1G offers legacy SOT23 compatibility but lacks the 500 mA headroom and thermal efficiency of the SOT323 variant.
Availability
BC817W,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power switching, and IoT node load control requiring stable component supply, consistent hFE binning, and SOT323 footprint reliability.
Supply support for BC817W,115 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 devices with focus on efficiency, miniaturization, and robustness for mass-market electronics.
The BC817W series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-volume applications demanding proven reliability, tight parametric spreads, and seamless SMT integration in compact consumer and industrial designs.
FAQ
What is the maximum continuous collector current for BC817W,115 at 70 °C ambient?
At 70 °C ambient, the BC817W,115's continuous collector current is derated to approximately 375 mA based on its 290 mW Ptot rating with 1 cm² collector pad (Rth(j-a) = 431 K/W) and 150 °C max junction temperature. This follows the linear derating curve in Figure 1 of the datasheet.
Does BC817W,115 support direct drive from 3.3 V microcontrollers?
Yes - with IC = 100 mA and hFE ≥ 100, BC817W,115 requires ≤1 mA base current. A 3.3 V GPIO driving through a 2.2 kΩ base resistor delivers ~1.1 mA, ensuring solid saturation. VBE(sat) ≤1.2 V at IC = 500 mA confirms sufficient forward bias even at full load.
Is BC817W,115 qualified for automotive applications?
No - per Revision History section 13, BC817W_SER v.8 explicitly states the device was changed to non-automotive qualification in 2022. Automotive-grade alternatives include BC817W-Q series variants, which undergo AEC-Q101 stress testing and feature extended temperature screening.
How does the SOT323 package affect thermal performance versus SOT23?
The SOT323 package has a smaller footprint (1.35 × 1.75 mm vs. 2.9 × 1.3 mm) but achieves lower Rth(j-a) (431 K/W with 1 cm² pad) than typical SOT23 (≈500 K/W) due to optimized internal leadframe thermal path and thinner mold compound. This allows higher power density in constrained layouts without sacrificing junction temperature margin.
BC817W,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC817W,115 FAQ
1.How can I place an order for BC817W,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817W,115 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 BC817W,115 reliable?
The price and inventory of BC817W,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817W,115 is usually 5 days.
3.What payment methods are accepted for BC817W,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817W,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817W,115?
BC817W,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817W,115 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 BC817W,115?
For technical support, including BC817W,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817W,115 requirements.
6.How does Aetrix verify that BC817W,115 is sourced from the original manufacturer or authorized distributors?
All BC817W,115 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 BC817W,115 meets industry standards.
7.What is the process for return or replacement of BC817W,115?
All BC817W,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC817W,115, 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 BC817W,115 part is unused and in its original packaging.
Return procedure for BC817W,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817W,115 Tags
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BC847B,215
Nexperia USA Inc.
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