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Nexperia USA Inc. BC817-40QB-QZ
- Part No.:
- BC817-40QB-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-40QB-QZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1110D-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
BC817-40QB-Q from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in a DFN1110D-3 (SOT8015) leadless SMD package with side-wettable flanks, delivering hFE = 250–600 at VCE = 1 V and IC = 100 mA, qualified to AEC-Q101 for automotive signal switching in space-constrained PCBs.
For engineers reviewing the BC817-40QB-Q datasheet, BC817-40QB-Q pinout, BC817-40QB-Q application, or BC817-40QB-Q equivalent, this device supports high-density AOI-compatible assembly, operates up to 150 °C junction temperature, and provides low VCE(sat) ≤ 700 mV at IC = 500 mA / IB = 50 mA for efficient low-voltage switching.
Technical Context
This NPN bipolar junction transistor uses silicon planar epitaxial die construction optimized for stable DC current gain across temperature (−55 °C to +150 °C) and exhibits fT ≥ 100 MHz at VCE = 5 V, IC = 10 mA, enabling reliable small-signal amplification and digital switching up to mid-frequency ranges.
Its DFN1110D-3 package features 0.65 mm pitch, 1.1 × 1.0 × 0.48 mm body dimensions, and side-wettable flanks for automated optical solder-joint inspection-critical for automotive PCB manufacturing where traceability and process yield are tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines safe operating voltage headroom in 24 V automotive systems. |
| IC | 500 mA continuous - Rated collector current at Tamb = 25 °C; supports driving medium-power loads like LED strings or relay coils. |
| hFE | 250–600 at VCE = 1 V, IC = 100 mA - High and tightly binned DC current gain enables predictable base drive sizing with margin for temperature drift. |
| VCE(sat) | ≤ 700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes power loss and self-heating during switching, improving thermal efficiency. |
| Ptot | 350 mW on FR4 (35 μm Cu) - Total power dissipation limit sets practical current/voltage trade-offs in compact layouts without forced cooling. |
| Rth(j-a) | 358 K/W - Junction-to-ambient thermal resistance determines steady-state temperature rise; requires careful copper area planning for automotive ambient extremes. |
| AEC-Q101 | Qualified - Meets stress-test requirements for discrete semiconductors in automotive applications, including temperature cycling and HTRB. |
Pinout & Package
DFN1110D-3 (SOT8015) is a 3-terminal, leadless, ultra-thin plastic package measuring 1.1 × 1.0 × 0.48 mm with side-wettable flanks for AOI-compliant reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal for forward-biased junction; requires current-limited drive (e.g., 1.2–2.0 mA typical for 100 mA collector load). |
| 2 | Emitter (E) | Current return path; internally connected to exposed thermal pad in some variants-here, serves as primary reference node for bias networks. |
| 3 | Collector (C) | Main output current path; electrically isolated from package thermal slug; connects to load or supply rail depending on circuit topology. |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100% automated optical inspection of solder joints on bottom-side terminals-eliminating X-ray dependency in high-volume automotive SMT lines. |
| AEC-Q101 qualification | Validated for automotive use per stress-test requirements including HTGB, HTRB, and temperature cycling-reducing qualification effort for Tier-1 suppliers. |
| Low profile (0.48 mm height) | Permits integration beneath connectors or shields in ultra-thin modules such as ADAS camera housings or ECU edge sensors. |
| Three hFE bins | BC817-40QB-Q's 250–600 gain range allows consistent gain matching across production lots without post-manufacture sorting. |
| High fT (≥100 MHz) | Supports clean square-wave switching up to ~10–20 MHz with minimal rise/fall time degradation-suitable for PWM dimming and digital logic interfacing. |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Controlling window lift motor direction and lock actuator solenoids in door control units. IC Role / Device Role / Timing Role: NPN switch providing low-side drive for 12 V/300 mA inductive loads with flyback protection. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; low VCE(sat) reduces heat generation in sealed modules. |
Use Scenario: Amplifying weak analog outputs (e.g., thermistor or bridge sensor) into robust 0–5 V signals for ADC input. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias network and emitter degeneration resistor. Use Value: Stable hFE over −40 °C to +125 °C maintains gain accuracy across industrial ambient ranges without recalibration. |
| Space-Constrained IoT Node Power Control | Consumer Appliance Motor Driver Stage |
|
Use Scenario: Enabling/disabling 3.3 V subsystems (e.g., BLE radio or display backlight) in coin-cell-powered trackers. IC Role / Device Role / Timing Role: Low-power NPN switch in active-high configuration with microcontroller GPIO control. Use Value: DFN1110D-3 footprint saves >60% board area vs. SOT23; side-wettable flanks ensure solder joint integrity in miniaturized reflow profiles. |
Use Scenario: Driving gate of a logic-level MOSFET in washing machine pump motor control circuits. IC Role / Device Role / Timing Role: Digital interface buffer translating 3.3 V/5 V MCU logic to higher-current MOSFET gate drive. Use Value: 500 mA IC rating safely delivers >10 mA peak gate charge current; fast fT ensures sub-microsecond turn-on response. |
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 |
|---|---|---|---|
| BC817-40,215 (SOT23) | Same electrical specs but in larger SOT23-3 package (2.9 × 1.3 × 1.0 mm); no side-wettable flanks; Rth(j-a) ≈ 450 K/W. | Lacks AOI support and thermal performance; suitable only where board space permits and automotive qualification is not required. | Select when legacy footprint compatibility or hand-soldering prototyping is prioritized over volume manufacturability. |
| MMBT3904LT1G | Lower VCEO = 40 V; hFE = 100–300; same SOT23 package; AEC-Q101 qualified but not optimized for ultra-thin layouts. | Marginally lower voltage headroom limits use in 24 V systems with transients; less gain stability at high IC. | Choose only if existing BOM already uses MMBT3904LT1G and redesign is prohibitive; verify transient clamping compliance. |
Compared with BC817-40,215 and MMBT3904LT1G, BC817-40QB-Q uniquely combines AEC-Q101 qualification, side-wettable flanks, and 0.48 mm height-making it the only option for new automotive designs requiring both AOI capability and ultra-dense packaging.
Availability
BC817-40QB-Q is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, space-constrained IoT nodes, and consumer appliance motor drivers requiring stable component supply across extended temperature and lifecycle demands.
Supply support for BC817-40QB-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 BC817QB-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for automotive signal switching and industrial amplification where AOI compatibility, thermal robustness, and footprint miniaturization are critical.
FAQ
What is the maximum allowable junction temperature for BC817-40QB-Q?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the limiting values table. Operation above this threshold risks permanent parametric shift or failure. Derating curves in Figure 1 show that total power dissipation must be reduced linearly above 25 °C ambient-e.g., to ~200 mW at 100 °C ambient on standard FR4.
Does BC817-40QB-Q require a heatsink in typical applications?
No external heatsink is required for continuous operation at IC ≤ 300 mA and ambient ≤ 70 °C on a standard FR4 PCB with 35 μm copper. Its Rth(j-a) of 358 K/W results in ~107 °C junction rise at 350 mW-within the 150 °C limit. Layout-level thermal relief (e.g., 20 mm² copper pour under pin 2) is sufficient.
How does the side-wettable flank design impact soldering process control?
Side-wettable flanks allow automated optical inspection (AOI) systems to verify solder fillet formation on all three terminals-including the otherwise hidden base and emitter edges-without X-ray. This eliminates manual visual checks and improves first-pass yield in automotive SMT lines using standard reflow profiles per J-STD-020.
Can BC817-40QB-Q replace BC817-40 in existing SOT23 designs?
No-it is not a drop-in replacement due to different package (DFN1110D-3 vs. SOT23), pinout orientation, and soldering requirements. The DFN1110D-3 has reversed pin 1/3 assignment and requires stencil-defined solder paste volume and reflow profile adjustments. Redesign of footprint and assembly process is mandatory.
BC817-40QB-QZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-XDFN Exposed Pad
- 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:
- 250 @ 100mA, 1V
- Power - Max:
- 350 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1110D-3
BC817-40QB-QZ FAQ
1.How can I place an order for BC817-40QB-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-40QB-QZ 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 BC817-40QB-QZ reliable?
The price and inventory of BC817-40QB-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-40QB-QZ is usually 5 days.
3.What payment methods are accepted for BC817-40QB-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-40QB-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-40QB-QZ?
BC817-40QB-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-40QB-QZ 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 BC817-40QB-QZ?
For technical support, including BC817-40QB-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-40QB-QZ requirements.
6.How does Aetrix verify that BC817-40QB-QZ is sourced from the original manufacturer or authorized distributors?
All BC817-40QB-QZ 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 BC817-40QB-QZ meets industry standards.
7.What is the process for return or replacement of BC817-40QB-QZ?
All BC817-40QB-QZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-40QB-QZ, 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 BC817-40QB-QZ part is unused and in its original packaging.
Return procedure for BC817-40QB-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-40QB-QZ Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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MMBT2222ALT1G
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