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Nexperia USA Inc. BC817-40QC-QZ
- Part No.:
- BC817-40QC-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-40QC-QZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1412D-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,986
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Product details
Overview
BC817-40QC-Q from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in a leadless DFN1412D-3 (SOT8009) package with side-wettable flanks, delivering hFE = 250–600 at VCE = 1 V and IC = 100 mA, 700 mV VCEsat at IC = 500 mA/IB = 50 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BC817-40QC-Q datasheet, BC817-40QC-Q pinout, BC817-40QC-Q application, or BC817-40QC-Q equivalent, this device supports space-constrained switching and amplification where low profile (0.48 mm height), AOI-compatible solder joints, and thermal robustness on FR4 PCBs are critical design requirements.
Technical Context
This NPN bipolar junction transistor operates as a linear amplifier or saturated switch with defined DC current gain spread (250–600), collector-emitter breakdown voltage of 45 V, and peak collector current capability of 1 A in pulsed operation. Its DFN1412D-3 package enables high-density placement while maintaining thermal resistance of 261 K/W on 70 μm copper FR4.
The device features side-wettable flanks for automated optical inspection of solder joints, qualified per AEC-Q101 for automotive underhood and body-control modules, and exhibits stable hFE across −55 °C to 150 °C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown in open-base configuration. |
| IC | 500 mA continuous - Sustained collector current rating at 25 °C ambient, defining steady-state load drive capacity. |
| hFE | 250–600 - DC current gain range at VCE = 1 V, IC = 100 mA, enabling predictable base drive sizing. |
| VCEsat | 700 mV max - Saturation voltage at IC = 500 mA / IB = 50 mA, directly determining conduction loss in switching applications. |
| Ptot | 480 mW - Maximum power dissipation on FR4 with 70 μm copper, setting thermal derating limits for PCB layout. |
| Rth(j-a) | 261 K/W - Junction-to-ambient thermal resistance on standard FR4, used to calculate temperature rise under load. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive applications including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
DFN1412D-3 (SOT8009) is a 3-terminal, leadless, ultra-thin surface-mount package measuring 1.4 × 1.2 × 0.48 mm with side-wettable flanks for AOI-compatible reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal for bias current injection; requires current-limited drive to achieve target hFE-dependent collector current. |
| 2 | Emitter (E) | Reference node for current flow; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | High-current output terminal; carries full load current and interfaces with supply rail or inductive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder fillets without X-ray, reducing post-solder verification cost. |
| AEC-Q101 qualification | Validated for automotive underhood environments with guaranteed operation from −55 °C to 150 °C junction temperature. |
| 0.48 mm package height | Reduces board profile in slim consumer and ADAS modules where Z-axis clearance is constrained. |
| Three hFE variants | BC817-40QC-Q provides highest gain bin (250–600), simplifying base resistor selection in low-drive circuits. |
| Thermal enhancement | 480 mW power dissipation on standard FR4 with 70 μm copper-23% higher than baseline 35 μm layout. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving LED indicators and small relays in door control units and lighting controllers. IC Role / Device Role / Timing Role: NPN switch controlling 12 V/200 mA loads with fast turn-on/turn-off governed by base drive timing. Use Value: AEC-Q101 qualification ensures long-term reliability in vibration-prone, thermally cycled vehicle environments. |
Use Scenario: Amplifying low-level analog signals from RTDs or bridge sensors before ADC sampling. IC Role / Device Role / Timing Role: Linear amplifier configured in common-emitter topology with fixed bias for DC-coupled gain. Use Value: Stable hFE over −40 °C to 85 °C ambient enables consistent gain calibration across operating temperature range. |
| Portable Medical Device | Smart Home Actuator Driver |
Use Scenario: Enabling/disabling power rails for low-power microcontrollers and sensor subsystems. IC Role / Device Role / Timing Role: Low-leakage, high-gain switch providing clean power gating with <100 nA ICBO at 20 V. Use Value: Ultra-small DFN1412D-3 footprint saves PCB area in compact wearable enclosures with strict size budgets. |
Use Scenario: Driving solenoid valves and small DC motors in HVAC dampers and smart locks. IC Role / Device Role / Timing Role: Saturated switch handling 400 mA inductive loads with 700 mV VCEsat minimizing heat generation. Use Value: Side-wettable flanks ensure solder joint integrity during automated assembly, reducing field failure risk in high-volume production. |
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 (SOT-23) | Same electrical specs but in larger SOT-23 package (2.9 × 1.3 × 1.0 mm); no side-wettable flanks; Rth(j-a) = 350 K/W. | Lacks AOI support and thermal performance; suitable only where board space and inspection method allow. | Select when legacy SOT-23 footprint compatibility is required and AOI is not mandated. |
| MMBT3904LT1G | Lower VCEO (40 V), lower IC (200 mA), hFE = 100–300; SOT-23 package; no AEC-Q101 qualification. | Not rated for automotive or 45 V systems; insufficient for 500 mA loads or underhood temperature extremes. | Use only in non-automotive, low-voltage (<40 V), low-current (<200 mA) consumer applications. |
Compared with BC817-40,215 and MMBT3904LT1G, BC817-40QC-Q uniquely combines AEC-Q101 compliance, 45 V/500 mA ratings, side-wettable flanks, and 0.48 mm height-making it the sole choice for space-constrained, AOI-dependent automotive switching where thermal margin and reliability are non-negotiable.
Availability
BC817-40QC-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal conditioning, portable medical power management, and smart home actuator driving requiring stable component supply across extended temperature ranges and high-volume manufacturing cycles.
Supply support for BC817-40QC-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 BC817QC-Q series targets space-constrained, high-reliability applications in automotive and industrial markets, emphasizing AOI-ready packaging, AEC-Q101 validation, and thermal efficiency in ultra-thin form factors.
FAQ
What is the maximum allowable junction temperature for BC817-40QC-Q?
The absolute maximum junction temperature (Tj) is 150 °C, as specified in Table 6 of the datasheet. Operation beyond this limit risks permanent degradation of hFE, leakage current, and bond wire integrity. Thermal design must ensure Tj remains ≤150 °C under worst-case ambient and power dissipation conditions.
Does BC817-40QC-Q require special reflow profile considerations due to its DFN package?
Yes-the DFN1412D-3 package requires precise stencil design and reflow profiling. Figure 17 specifies a recommended stencil thickness of 0.1 mm and solder land dimensions of 0.75 × 0.85 mm. Peak reflow temperature must not exceed 260 °C for ≤10 seconds to avoid delamination or voiding in side-wettable flank regions.
Can BC817-40QC-Q replace BC817-40 in existing SOT-23 designs?
No-BC817-40QC-Q uses the DFN1412D-3 (SOT8009) package, which is physically incompatible with SOT-23 footprints. It requires a new PCB layout with 0.8 mm pitch, side-wettable flank pads, and thermal relief patterns matching Figure 17. Electrical equivalence does not imply mechanical interchangeability.
How does the hFE variation affect base resistor selection in switching applications?
With hFE spanning 250–600, base resistors must be sized for the minimum gain (250) to guarantee saturation at IC = 500 mA. This yields IB ≥ 2 mA, requiring RB ≤ (VIO − 0.7 V)/2 mA. Using the max hFE would risk insufficient drive under process/voltage/temperature extremes.
BC817-40QC-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:
- 380 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1412D-3
BC817-40QC-QZ FAQ
1.How can I place an order for BC817-40QC-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-40QC-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 BC817-40QC-QZ reliable?
The price and inventory of BC817-40QC-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-40QC-QZ is usually 5 days.
3.What payment methods are accepted for BC817-40QC-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-40QC-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-40QC-QZ?
BC817-40QC-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-40QC-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 BC817-40QC-QZ?
For technical support, including BC817-40QC-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-40QC-QZ requirements.
6.How does Aetrix verify that BC817-40QC-QZ is sourced from the original manufacturer or authorized distributors?
All BC817-40QC-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 BC817-40QC-QZ meets industry standards.
7.What is the process for return or replacement of BC817-40QC-QZ?
All BC817-40QC-QZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-40QC-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 BC817-40QC-QZ part is unused and in its original packaging.
Return procedure for BC817-40QC-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-40QC-QZ Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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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
-
BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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