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Nexperia USA Inc. BC817-16W-QX
- Part No.:
- BC817-16W-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC817-16W-QX.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,080
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Product details
Overview
BC817-16W-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V VCEO, 500 mA IC, and DC current gain (hFE) of 100–250 at VCE = 1 V, IC = 100 mA. It serves as a compact, automotive-grade switching and amplification device in space-constrained PCBs for power management and signal conditioning circuits.
For engineers reviewing the BC817-16W-Q datasheet, BC817-16W-Q pinout, BC817-16W-Q application, or BC817-16W-Q equivalent, this page delivers verified electrical parameters, thermal derating behavior, automotive qualification status, and real-world use context - all aligned with Nexperia's official Rev. 1 (June 2021) product data sheet.
Technical Context
This discrete NPN bipolar junction transistor operates in linear or saturated switching modes, with base-emitter turn-on voltage (VBE) of ≤1.2 V at IC = 500 mA and collector-emitter saturation voltage (VCE(sat)) ≤700 mV under same conditions. Its fT of 100 MHz supports moderate-frequency amplification up to ~100 MHz.
Thermal performance is defined by Rth(j-a) = 625 K/W on standard FR4 PCB and 431 K/W with enhanced 1 cm² collector pad. Junction temperature is rated to 150 °C, supporting operation in automotive under-hood environments when properly mounted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-voltage switching stages. |
| IC | 500 mA continuous - Sustained collector current capability at 25 °C ambient; usable for driving relays, LEDs, or small solenoids. |
| hFE | 100–250 at VCE = 1 V, IC = 100 mA - Predictable DC current gain range enabling stable bias design without excessive base drive overhead. |
| VCE(sat) | ≤700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications. |
| Ptot | 200 mW (standard footprint) / 290 mW (enhanced pad) - Power dissipation limits define thermal layout requirements for reliable long-term operation. |
| fT | 100 MHz - Transition frequency enables use in audio preamplifiers and low-speed digital signal buffering, not RF. |
| Rth(j-a) | 625 K/W - Thermal resistance dictates required PCB copper area and airflow for junction temperature control below 150 °C. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: ultra-compact 3-pin outline measuring 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for high-density routing and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal accepting current-limited input to modulate collector current; requires series resistor to prevent overdrive. |
| 2 | Emitter (E) | Current return path; typically tied to ground or low-side reference; establishes common node for bias network. |
| 3 | Collector (C) | Output terminal sourcing current to load; connected to positive rail via load; thermally coupled to PCB pad for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics per stress-test standard. |
| Three hFE selections | BC817-16W-Q (100–250), BC817-25W-Q (160–400), BC817-40W-Q (250–600) enable precise gain matching across production batches. |
| Low VCE(sat) | ≤700 mV ensures <1.5% voltage drop across transistor at full 500 mA load, preserving efficiency in 3.3 V/5 V systems. |
| High fT | 100 MHz transition frequency supports clean square-wave switching up to ~10 MHz and audio-band amplification without roll-off. |
| Small-footprint SOT323 | 0.95 mm height and 2.2 mm length allow placement beneath connectors or near ICs where board space is constrained. |
Applications
| Automotive Door Module | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Driving window lift motor relays and LED status indicators in door control units. IC Role / Device Role / Timing Role: Discrete NPN switch controlling 12 V relay coils and 20 mA indicator LEDs. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; low VCE(sat) reduces coil heating and extends relay contact life. |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor, potentiometer) into microcontroller ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower amplifier providing low-impedance output and unity-gain buffering. Use Value: Stable hFE range (100–250) enables predictable biasing; SOT323 footprint fits tight sensor PCB layouts. |
| Consumer Power Supply Enable | Medical Diagnostic Equipment |
|
Use Scenario: Enabling/disabling auxiliary 3.3 V LDO regulators in smart home hubs based on system wake signals. IC Role / Device Role / Timing Role: Low-side switch turning on LDO EN pin with fast turn-on/turn-off (<1 µs propagation). Use Value: 500 mA IC rating exceeds typical EN pin leakage; 100 MHz fT ensures clean edge response without ringing. |
Use Scenario: Isolating microcontroller GPIOs from higher-current peripheral drivers (e.g., buzzer, display backlight) in portable diagnostics tools. IC Role / Device Role / Timing Role: General-purpose interface buffer preventing MCU pin overload during transient loads. Use Value: 45 V VCEO provides margin against ESD-induced transients; 150 °C Tj rating supports sealed enclosure thermal profiles. |
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-Q | Lower IC (100 mA), higher hFE (110–800), same SOT323 package | Optimized for low-current signal amplification, not 500 mA switching | Select when gain stability > current handling; avoid for relay/solenoid drive. |
| MMBT3904LT1G | Same VCEO (40 V), lower IC (200 mA), non-automotive qualified, SOT23 package | Cost-sensitive consumer designs without AEC-Q101 requirement | Use only in non-automotive, non-safety-critical applications; larger SOT23 footprint than SOT323. |
Compared with BC817-16W-Q, BC847BW-Q trades current capacity for wider hFE tolerance in low-power roles, while MMBT3904LT1G offers cost advantage but lacks automotive qualification and thermal robustness - making BC817-16W-Q the optimal choice for space-constrained, AEC-compliant 500 mA switching.
Availability
BC817-16W-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power sequencing, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC817-16W-Q 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 discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BC817W-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust, space-efficient switching and amplification in automotive and industrial control systems.
FAQ
What is the maximum allowable junction temperature for BC817-16W-Q?
The absolute maximum junction temperature (Tj) is 150 °C, as specified in Table 6 of the Nexperia datasheet. Operation above this threshold risks permanent degradation. Derating curves in Figure 1 show that total power dissipation must be reduced linearly above 25 °C ambient, reaching zero at 150 °C for standard mounting.
Is BC817-16W-Q pin-compatible with BC847BW-Q?
No - although both use SOT323 packages, BC817-16W-Q has base-collector-emitter pinout (1-B, 2-E, 3-C), while BC847BW-Q uses emitter-base-collector (1-E, 2-B, 3-C). Swapping them without PCB revision causes circuit failure due to reversed polarity and unintended conduction paths.
Can BC817-16W-Q replace BC817-40W-Q in a design?
Only if the application does not require hFE ≥250. BC817-16W-Q has hFE = 100–250 versus BC817-40W-Q's 250–600. In high-gain bias networks or low-base-drive scenarios, substitution may cause insufficient collector current or thermal instability due to reduced current amplification.
Does BC817-16W-Q support wave soldering?
Yes - Nexperia provides dedicated wave soldering footprint dimensions in Figure 18 (sot323_fw), specifying 3.65 mm × 2.1 mm land pattern with 1.425 mm × 0.55 mm pads and preferred transport direction. Thermal mass and solder wicking behavior are validated for lead-free wave processes per JEDEC J-STD-020.
BC817-16W-QX 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
BC817-16W-QX FAQ
1.How can I place an order for BC817-16W-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-16W-QX 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-QX reliable?
The price and inventory of BC817-16W-QX 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-QX is usually 5 days.
3.What payment methods are accepted for BC817-16W-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-16W-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-16W-QX?
BC817-16W-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-16W-QX 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-QX?
For technical support, including BC817-16W-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-16W-QX requirements.
6.How does Aetrix verify that BC817-16W-QX is sourced from the original manufacturer or authorized distributors?
All BC817-16W-QX 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-QX meets industry standards.
7.What is the process for return or replacement of BC817-16W-QX?
All BC817-16W-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC817-16W-QX, 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-QX part is unused and in its original packaging.
Return procedure for BC817-16W-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-16W-QX Tags
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MMBT3906-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
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