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Nexperia USA Inc. BC817-25QB-QZ
- Part No.:
- BC817-25QB-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-25QB-QZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1110D-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,270
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Product details
Overview
BC817-25QB-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in a DFN1110D-3 (SOT8015) leadless package, rated for 45 V VCEO, 500 mA continuous IC, and offering hFE of 160–400 at VCE = 1 V and IC = 100 mA. It delivers low 0.5 mm profile, side-wettable flanks for AOI-compatible solder joint inspection, and is deployed in automotive body control modules for load switching.
For engineers reviewing the BC817-25QB-Q datasheet, BC817-25QB-Q pinout, BC817-25QB-Q application, or BC817-25QB-Q equivalent, this page provides verified pin functions, thermal derating curves, hFE vs. temperature behavior, saturation voltage under 500 mA load, and AEC-Q101 qualification status - all critical for space-constrained automotive and industrial switching designs.
Technical Context
This device operates as a medium-power NPN bipolar junction transistor with base-controlled current amplification. Its DC current gain (hFE) is binned to 160–400 at 100 mA collector current and 1 V VCE, and maintains usable gain down to −55 °C and up to 150 °C junction temperature.
The DFN1110D-3 package features side-wettable flanks enabling automated optical inspection of solder joints, and achieves 272 K/W thermal resistance (junction-to-ambient) on 70 μm FR4 copper - critical for thermal management in dense PCB layouts without heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with open base; defines maximum supply rail compatibility in switching circuits. |
| IC | 500 mA - Continuous collector current rating at 25 °C ambient; sets upper bound for steady-state load drive capability. |
| hFE | 160–400 - Confirmed DC current gain range at VCE = 1 V, IC = 100 mA; enables predictable base drive sizing for saturation. |
| VCE(sat) | ≤ 700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage ensures < 0.35 W conduction loss at full rated current. |
| Ptot | 460 mW - Max power dissipation on 70 μm FR4 PCB; determines thermal headroom before derating begins above 25 °C. |
| Tj(max) | 150 °C - Absolute maximum junction temperature; constrains operating ambient and board-level thermal design. |
| AEC-Q101 | Qualified - Certified for automotive applications per stress test standard; supports use in non-safety-critical vehicle subsystems. |
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. It uses a bottom-terminated layout requiring reflow-compatible footprint per Figure 17 in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires ≥13 mA base drive to saturate at 500 mA collector current (IC/IB = 38 typical). |
| 2 | Emitter | Current return path; internally connected to exposed thermal pad in DFN package for enhanced heat transfer. |
| 3 | Collector | Main output terminal; carries full load current and connects to high-side or low-side switch node depending on topology. |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables 100% automated optical inspection (AOI) of solder joints without X-ray, reducing post-reflow defect escape. |
| 0.5 mm package height | Reduces board stack height in ultra-thin modules such as smart sensors and compact ECUs where Z-space is constrained. |
| AEC-Q101 qualification | Validated for automotive environments including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Three hFE bins | Allows precise gain matching across production lots - critical for analog amplification stages and feedback loop stability. |
| Low Rth(j-a) | 272 K/W on 70 μm FR4 enables >300 mW usable power at 85 °C ambient without forced cooling or derating. |
Applications
| Automotive Body Control Unit | Industrial PLC Output Stage |
|---|---|
Use Scenario: Driving 12 V solenoids and relays in door lock actuators and lighting control modules. IC Role / Device Role / Timing Role: Low-side switch controlling ground path of inductive loads; handles repetitive 500 mA pulses with <1 μs turn-off delay. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; side-wettable flanks eliminate manual solder inspection. |
Use Scenario: Isolating microcontroller GPIO pins from 24 V field outputs in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: General-purpose interface transistor translating logic-level signals to higher-current industrial loads. Use Value: 45 V VCEO withstands 24 V system transients; 160–400 hFE binning simplifies base resistor selection across production batches. |
| Space-Constrained Sensor Node | Consumer Appliance Motor Driver |
Use Scenario: Signal conditioning and level-shifting in battery-powered IoT environmental sensors with <3 mm PCB height budget. IC Role / Device Role / Timing Role: Amplifier stage for analog sensor signal buffering prior to ADC input; operates in linear region. Use Value: 0.48 mm max package height fits under compact enclosures; low 100 nA ICBO minimizes leakage error at 85 °C. |
Use Scenario: Driving small brushed DC motors in smart home appliances like coffee makers and vacuum cleaners. IC Role / Device Role / Timing Role: Medium-current switch in H-bridge half-bridge leg or single-ended motor enable path. Use Value: 500 mA IC and 700 mV VCE(sat) limit self-heating to <0.35 W; qualified for 85 °C ambient operation per IEC 60730. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-25,115 (SOT23) | Larger SOT23 package (2.9 × 1.3 × 1.0 mm); no side-wettable flanks; hFE 160–400 same bin but lower thermal performance (Rth(j-a) ≈ 400 K/W). | Suitable for non-automotive, non-AOI production lines; not qualified to AEC-Q101. | Select when AOI is unnecessary and board area is not constrained - offers broader distributor availability. |
| MMBT3904LT1G (SOT23) | Lower VCEO (40 V), lower IC (200 mA), hFE 100–300; not AEC-Q101 qualified; TO-236AB package. | Not suitable for 45 V systems or 500 mA loads; limited to low-power signal switching. | Choose only for cost-sensitive consumer applications below 200 mA and 40 V - avoid in automotive or industrial settings. |
Compared with BC817-25QB-Q, the BC817-25,115 trades AOI capability and thermal efficiency for wider legacy availability, while MMBT3904LT1G sacrifices voltage margin, current capacity, and automotive qualification - making BC817-25QB-Q the sole option meeting all three requirements simultaneously.
Availability
BC817-25QB-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and space-constrained sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for BC817-25QB-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, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
The BC817QB-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for robust, high-volume automotive and industrial switching applications where reliability, thermal performance, and AOI compatibility are mandatory.
FAQ
What is the maximum allowable junction temperature for BC817-25QB-Q?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in Table 6 of the datasheet. Operation beyond this value risks permanent parametric shift or failure. Derating begins at 25 °C ambient, with total power dissipation dropping linearly to zero at 150 °C junction temperature - confirmed by Fig. 1's dual-curve derating plot for 35 μm and 70 μm copper PCBs.
Does BC817-25QB-Q require a thermal pad connection on the PCB?
Yes - the DFN1110D-3 package includes an exposed thermal pad (pin 2, emitter) that must be soldered to a dedicated copper pour on the PCB for effective heat dissipation. The datasheet specifies that the 460 mW Ptot rating assumes connection to 70 μm copper; omitting the thermal pad reduces usable power by ~30% and raises junction temperature significantly under load.
Is BC817-25QB-Q pin-compatible with BC817-25,115?
No - BC817-25QB-Q uses the 3-pin DFN1110D-3 (SOT8015) package with bottom terminals and side-wettable flanks, while BC817-25,115 uses the through-hole compatible SOT23 package with gull-wing leads. Their footprints, reflow profiles, and thermal interfaces are incompatible; direct replacement requires PCB redesign.
What marking code identifies BC817-25QB-Q on the package?
The top-side laser marking code for BC817-25QB-Q is "B4", as specified in Table 5 of the datasheet. This 2-character code distinguishes it from BC817-16QB-Q ("B3") and BC817-40QB-Q ("B5"), enabling automated optical verification during assembly and traceability in automotive production lines.
BC817-25QB-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:
- 160 @ 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
BC817-25QB-QZ FAQ
1.How can I place an order for BC817-25QB-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25QB-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 BC817-25QB-QZ reliable?
The price and inventory of BC817-25QB-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25QB-QZ is usually 5 days.
3.What payment methods are accepted for BC817-25QB-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25QB-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25QB-QZ?
BC817-25QB-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25QB-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 BC817-25QB-QZ?
For technical support, including BC817-25QB-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25QB-QZ requirements.
6.How does Aetrix verify that BC817-25QB-QZ is sourced from the original manufacturer or authorized distributors?
All BC817-25QB-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 BC817-25QB-QZ meets industry standards.
7.What is the process for return or replacement of BC817-25QB-QZ?
All BC817-25QB-QZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25QB-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 BC817-25QB-QZ part is unused and in its original packaging.
Return procedure for BC817-25QB-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25QB-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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onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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