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Nexperia USA Inc. BC817-40QBH-QZ
- Part No.:
- BC817-40QBH-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-40QBH-QZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1110D-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,385
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Product details
Overview
BC817-40QBH-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in a DFN1110D-3 (SOT8015) leadless package, delivering 45 V VCEO, 500 mA IC, hFE of 250–600 at VCE = 1 V / IC = 100 mA, and operation up to 175 °C junction temperature - used for automotive body control module switching and low-power amplification stages.
For engineers reviewing the BC817-40QBH-Q datasheet, BC817-40QBH-Q pinout, BC817-40QBH-Q application, or BC817-40QBH-Q equivalent, key selection criteria include its side-wettable flank design for AOI-compatible solder joint inspection, ultra-thin 0.5 mm profile for space-constrained PCBs, and validated thermal performance on FR4 with 70 μm copper.
Technical Context
This device operates as a silicon NPN bipolar junction transistor optimized for linear amplification and saturated switching in automotive and industrial environments. Its base-emitter and collector-emitter junctions are rated for 5 V and 45 V breakdown respectively, with pulsed peak collector current capability of 1 A and guaranteed hFE range spanning 250–600 under standard test conditions.
The DFN1110D-3 package enables high-density placement and automated optical inspection via side-wettable flanks, while thermal resistance Rth(j-a) is 272 K/W on FR4 with 70 μm copper - supporting reliable operation at ambient temperatures from –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown in open-base configuration; defines upper rail limit in switching circuits. |
| IC | 500 mA continuous - Sustained collector current rating at 25 °C ambient; supports medium-power load switching without forced cooling. |
| hFE | 250–600 at VCE = 1 V, IC = 100 mA - Confirmed DC current gain range enabling predictable base drive sizing for saturation. |
| VCE(sat) | ≤ 700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss in high-duty-cycle switch applications. |
| Tj(max) | 175 °C - Maximum junction temperature; allows deployment in under-hood automotive locations without derating below 125 °C ambient. |
| Ptot | 550 mW on FR4 with 70 μm copper - Total power dissipation limit defining thermal layout requirements for PCB copper area and thickness. |
| fT | 100 MHz at VCE = 5 V, IC = 10 mA - Transition frequency confirming suitability for low-frequency signal amplification and PWM control up to ~10 MHz. |
Pinout & Package
DFN1110D-3 (SOT8015) is a 3-terminal, leadless, thermally enhanced ultra-thin plastic package measuring 1.1 × 1.0 × 0.5 mm with side-wettable flanks for AOI compatibility and improved heat transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires ≥12 mA base drive for full 500 mA collector saturation per hFE min and VCE(sat) spec. |
| 2 | Emitter (E) | Current return path; internally connected to exposed die paddle in DFN package - must be soldered to PCB thermal pad for rated Ptot. |
| 3 | Collector (C) | Main output terminal; electrically and thermally coupled to package backside; connects to load or supply rail in common-emitter configurations. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing - eliminates need for additional qualification in BCM, lighting, and sensor interface designs. |
| Side-wettable flanks | Enables 100% automated optical inspection of solder joints without X-ray - reduces post-reflow defect escape in high-volume automotive PCB assembly. |
| 0.5 mm package height | Reduces board stack height by >60% vs. SOT23 - critical for ultra-thin modules such as smart actuators and compact ADAS sensors. |
| 175 °C junction rating | Supports operation in engine bay or powertrain proximity without thermal throttling - extends usable lifetime in high-ambient environments. |
| Three hFE variants | BC817-16QBH-Q (100–250), BC817-25QBH-Q (160–400), BC817-40QBH-Q (250–600) - enables precise gain binning for consistent analog biasing across production lots. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving LED status indicators and small solenoids in door modules and seat controllers. IC Role / Device Role / Timing Role: NPN switch operating in saturation mode with 500 mA load capability and <700 mV VCE(sat). Use Value: Eliminates need for external flyback diodes due to robust 45 V VCEO rating and supports direct connection to 12 V battery rails with transient tolerance. |
Use Scenario: Amplifying low-level bridge sensor outputs (e.g., pressure or temperature transducers) into ADC-input compatible levels. IC Role / Device Role / Timing Role: Linear amplifier configured in common-emitter topology with stable 250–600 hFE across –40 °C to +125 °C. Use Value: Maintains gain consistency over wide temperature range without recalibration, reducing firmware compensation overhead in embedded systems. |
| Compact Power Supply Enable Circuit | Smart Home Actuator Interface |
|
Use Scenario: Enabling/disabling auxiliary 5 V or 3.3 V LDO regulators in energy-efficient IoT gateways. IC Role / Device Role / Timing Role: Low-side switch controlling regulator EN pin with fast turn-on/turn-off governed by fT ≥ 100 MHz. Use Value: Achieves sub-microsecond switching transitions, minimizing enable delay and improving system responsiveness during wake-up sequences. |
Use Scenario: Controlling micro-stepping motor drivers and relay coils in smart thermostats and HVAC controllers. IC Role / Device Role / Timing Role: General-purpose switching transistor handling repetitive 500 mA inductive loads with integrated clamping via PCB layout. Use Value: Side-wettable flanks ensure solder joint integrity verification in consumer-grade reflow processes, lowering field failure rates. |
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 legacy SOT23-3 package; no side-wettable flanks; 1.3 mm height vs. 0.5 mm. | Lacks AOI support and thermal performance; unsuitable for AEC-Q101-compliant automotive designs. | Select only for non-automotive, cost-sensitive boards where AOI and ultra-thin profile are not required. |
| MMBT3904LT1G | Lower VCEO (40 V), lower IC (200 mA), no AEC-Q101 qualification; TO-236AB (SOT-23) package. | Not rated for automotive under-hood use; limited to commercial-temp consumer electronics. | Choose only for non-automotive, low-current (<200 mA), non-AOI production environments. |
Compared with BC817-40,215 and MMBT3904LT1G, BC817-40QBH-Q uniquely combines AEC-Q101 compliance, side-wettable flanks for AOI, and 0.5 mm height - making it the sole option for space-constrained, high-reliability automotive PCBs requiring zero-defect solder joint verification.
Availability
BC817-40QBH-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, compact power supply enable circuits, and smart home actuator designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BC817-40QBH-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 essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.
This part belongs to the BC817QBH-Q series of AEC-Q101-qualified general-purpose transistors designed specifically for automotive electronics requiring robust thermal performance, AOI-compatible packaging, and extended temperature operation.
FAQ
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current is 200 mA per datasheet limiting values, but for continuous DC operation, base current must be sized to maintain IC ≤ 500 mA while ensuring VCE(sat) ≤ 700 mV. With minimum hFE of 250, 2 mA base current supports 500 mA collector current - typical design uses 5–10 mA for margin and temperature stability.
Does BC817-40QBH-Q require a thermal pad connection on the PCB?
Yes - the DFN1110D-3 package features an exposed emitter paddle that serves as the primary thermal path. The datasheet specifies 550 mW total power dissipation assumes connection to a minimum 15 mm² copper area with 70 μm thickness; omitting this pad reduces Ptot to 420 mW and risks thermal runaway above 125 °C ambient.
Can BC817-40QBH-Q replace BC817-40 in existing SOT23 designs?
No - BC817-40QBH-Q uses DFN1110D-3 (SOT8015), which has different footprint, soldering profile, and thermal land requirements versus SOT23. Direct replacement requires PCB redesign, stencil update, and requalification of solder joint reliability due to side-wettable flank geometry and absence of leads.
Is the marking code 'G3' unique to BC817-40QBH-Q?
Yes - per Table 5 of the datasheet, 'G3' is the exclusive top-side laser marking for BC817-40QBH-Q. This distinguishes it from BC817-16QBH-Q ('F9') and BC817-25QBH-Q ('G2'), enabling automated optical sorting and preventing gain-bin mixing during high-speed pick-and-place assembly.
BC817-40QBH-QZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817QBH-Q
- 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:
- 420 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1110D-3
BC817-40QBH-QZ FAQ
1.How can I place an order for BC817-40QBH-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-40QBH-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 BC817-40QBH-QZ reliable?
The price and inventory of BC817-40QBH-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-40QBH-QZ is usually 5 days.
3.What payment methods are accepted for BC817-40QBH-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-40QBH-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-40QBH-QZ?
BC817-40QBH-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-40QBH-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 BC817-40QBH-QZ?
For technical support, including BC817-40QBH-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-40QBH-QZ requirements.
6.How does Aetrix verify that BC817-40QBH-QZ is sourced from the original manufacturer or authorized distributors?
All BC817-40QBH-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 BC817-40QBH-QZ meets industry standards.
7.What is the process for return or replacement of BC817-40QBH-QZ?
All BC817-40QBH-QZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-40QBH-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 BC817-40QBH-QZ part is unused and in its original packaging.
Return procedure for BC817-40QBH-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-40QBH-QZ Tags
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