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Nexperia USA Inc. BC817-25QCZ
- Part No.:
- BC817-25QCZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-25QCZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1412D-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,294
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Product details
Overview
BC817-25QCZ from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in a leadless DFN1412D-3 (SOT8009) package with side-wettable flanks, designed for space-constrained switching and amplification in automotive and industrial PCBs. It delivers DC current gain (hFE) of 160–400 at VCE = 1 V and IC = 100 mA, VCE(sat) ≤ 700 mV at IC = 500 mA/IB = 50 mA, and is AEC-Q101 qualified.
For engineers reviewing the BC817-25QCZ datasheet, BC817-25QCZ pinout, BC817-25QCZ application, or BC817-25QCZ equivalent, this page provides verified package dimensions, thermal derating curves, AOI-compatible solder joint geometry, and validated automotive-grade reliability data - all critical for high-density, thermally constrained, and mission-critical board designs.
Technical Context
This NPN bipolar junction transistor operates as a low-voltage, medium-current switch or linear amplifier with fixed-emitter biasing topology. Its DFN1412D-3 package enables direct thermal coupling to PCB copper planes, supporting up to 480 mW total power dissipation on 70 μm FR4 copper.
The device features three hFE bins (16–40) across the BC817QC series, with BC817-25QCZ specifically optimized for balanced gain and saturation voltage trade-offs. It meets AEC-Q101 stress test requirements for temperature cycling, humidity, and mechanical shock - confirming suitability for under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; sets safe operating range for 24 V automotive and 36 V industrial supply rails. |
| IC | 500 mA continuous - Sustained collector current rating; supports driving relays, LEDs, and small solenoids without external heatsinking. |
| hFE | 160–400 at VCE = 1 V, IC = 100 mA - Confirmed DC current gain bin enabling predictable base drive sizing for stable switching margins. |
| VCE(sat) | ≤ 700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in high-duty-cycle switching. |
| Rth(j-a) | 261 K/W (70 μm Cu) - Thermal resistance from junction to ambient; determines required PCB copper area for thermal management at full load. |
| Tj(max) | 150 °C - Maximum junction temperature; defines upper thermal limit for operation in sealed enclosures or high-ambient environments. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test standard; eliminates need for customer-level qualification in Tier 1 modules. |
Pinout & Package
DFN1412D-3 (SOT8009) is a 1.4 mm × 1.2 mm × 0.48 mm ultra-thin, leadless plastic package with side-wettable flanks for automated optical inspection (AOI) of solder joints. Its 0.8 mm pitch and 3-terminal layout enable high-density routing and improved thermal transfer via exposed bottom pad contact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input terminal; requires 50 mA base drive for full 500 mA collector conduction; sensitive to ESD during handling. |
| 2 | Emitter (E) | Current return path; internally connected to exposed thermal pad; must be soldered to large copper pour for thermal performance. |
| 3 | Collector (C) | High-side output node; rated for 45 V blocking; connects to load or pull-up rail; carries full switched current. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control units and body electronics modules. |
| Side-wettable flanks (SWF) | Enables reliable AOI detection of solder fillet integrity on all three terminals - critical for zero-defect manufacturing. |
| 0.5 mm package height | Reduces profile for slim consumer devices and stacked PCB assemblies where Z-axis clearance is constrained. |
| Three hFE bins | BC817-25QCZ's 160–400 gain range ensures consistent switching thresholds across production lots without manual binning. |
| Thermal enhancement | Exposed emitter pad transfers heat directly to PCB; achieves 480 mW dissipation on 70 μm copper - 23% higher than standard 35 μm layouts. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving door lock actuators and interior lighting loads in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: NPN switch controlling ground-side current path for resistive and inductive loads. Use Value: AEC-Q101 qualification and 45 V VCEO ensure robustness against load-dump transients up to 40 V, eliminating need for external TVS clamping. |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., RTD, thermistor) into microcontroller ADC inputs. IC Role / Device Role / Timing Role: Linear amplifier configured in common-emitter mode for signal gain and impedance transformation. Use Value: Tight hFE bin (160–400) and low VBE (≤1.2 V) enable precise, temperature-stable biasing without trimming resistors. |
| Space-Constrained IoT Node | Consumer Appliance Power Sequencing |
Use Scenario: Enabling/disabling peripheral subsystems (Wi-Fi, BLE, display) in battery-powered smart home sensors. IC Role / Device Role / Timing Role: Low-quiescent-current switch managing power domain isolation between sleep and active states. Use Value: 0.48 mm height and 1.4 × 1.2 mm footprint reduce board area by >60% vs. SOT23, enabling coin-cell-sized form factors. |
Use Scenario: Controlling startup sequencing of motor drivers, fans, and LED backlights in washing machines and HVAC controls. IC Role / Device Role / Timing Role: Discrete logic-level translator interfacing 3.3 V MCU GPIOs with 12 V/24 V power rails. Use Value: VCE(sat) ≤ 700 mV at 500 mA ensures <150 mW conduction loss per channel, minimizing thermal rise in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-25,115 (SOT23) | Same hFE bin but in larger SOT23 package; Rth(j-a) = 350 K/W; no side-wettable flanks. | Lacks AOI support and thermal performance; suitable only for non-automotive, low-volume prototypes. | Select only if legacy footprint compatibility outweighs AOI and thermal requirements. |
| MMBT3904LT1G | Lower VCEO (40 V), lower IC (200 mA), no AEC-Q101 qualification; TO-236AB package. | Not rated for automotive transients or 500 mA loads; limited to consumer-grade signal switching. | Choose only for cost-sensitive, non-automotive, sub-200 mA applications where qualification is unnecessary. |
Compared with BC817-25,115 and MMBT3904LT1G, BC817-25QCZ uniquely combines AEC-Q101 compliance, 500 mA capability, side-wettable flanks for AOI, and 261 K/W thermal resistance - making it the sole option for production automotive and high-reliability industrial switching where footprint, thermal, and qualification constraints intersect.
Availability
BC817-25QCZ is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, space-constrained IoT nodes, and consumer appliance power sequencing requiring stable component supply across extended product lifecycles.
Supply support for BC817-25QCZ 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 components for automotive, industrial, and consumer markets.
The BC817QC series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for high-density, thermally demanding switching and amplification in automotive ECUs and industrial control systems.
FAQ
What is the maximum allowable peak collector current for BC817-25QCZ?
The absolute maximum peak collector current (ICM) is 1 A for single pulses ≤ 1 ms at Tamb = 25 °C. This rating assumes short-duration, non-repetitive conditions and must be derated per Fig. 1 power derating curves when used continuously or at elevated ambient temperatures.
Does BC817-25QCZ require special reflow profile considerations due to its DFN package?
Yes - the DFN1412D-3 package requires precise stencil design (0.1 mm thickness recommended) and reflow profiles aligned with IPC-J-STD-020. Figure 17 specifies solder land dimensions, and side-wettable flanks demand controlled heating to ensure uniform wetting without voiding or tombstoning.
How does the hFE variation affect base resistor selection in switching applications?
With hFE ranging from 160 to 400, base resistors must be sized for worst-case gain (160) to guarantee saturation at full 500 mA load. For example, using IB = 50 mA ensures IC/IB = 10 even at minimum hFE, maintaining VCE(sat) ≤ 700 mV across process and temperature extremes.
Is the exposed thermal pad electrically isolated or connected to a specific terminal?
The exposed thermal pad on the DFN1412D-3 package is internally connected to the emitter (Pin 2). It must be soldered to a dedicated PCB copper pour tied to the emitter net to achieve specified thermal resistance and prevent thermal runaway during sustained conduction.
BC817-25QCZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817QC
- Package/Case:
- 3-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 380 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1412D-3
BC817-25QCZ FAQ
1.How can I place an order for BC817-25QCZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25QCZ 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 BC817-25QCZ reliable?
The price and inventory of BC817-25QCZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25QCZ is usually 5 days.
3.What payment methods are accepted for BC817-25QCZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25QCZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25QCZ?
BC817-25QCZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25QCZ 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 BC817-25QCZ?
For technical support, including BC817-25QCZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25QCZ requirements.
6.How does Aetrix verify that BC817-25QCZ is sourced from the original manufacturer or authorized distributors?
All BC817-25QCZ 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 BC817-25QCZ meets industry standards.
7.What is the process for return or replacement of BC817-25QCZ?
All BC817-25QCZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25QCZ, 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 BC817-25QCZ part is unused and in its original packaging.
Return procedure for BC817-25QCZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25QCZ Tags
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