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Nexperia USA Inc. BC817-25QBZ
- Part No.:
- BC817-25QBZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC817-25QBZ.pdf
- Description:
- TRANS NPN 45V 0.5A DFN1110D-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,520
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Product details
Overview
BC817-25QBZ 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, DC current gain (hFE) of 160–400 at VCE = 1 V and IC = 100 mA, 0.5 mm profile, and side-wettable flanks for AOI-compatible solder joint inspection - used in automotive body control modules for LED driver switching.
For engineers reviewing the BC817-25QBZ datasheet, BC817-25QBZ pinout, BC817-25QBZ application, or BC817-25QBZ equivalent, key selection criteria include its AEC-Q101 qualification, ultra-thin 0.5 mm height, 160–400 hFE spread, thermal resistance of 272 K/W on 70 μm FR4, and compatibility with reflow soldering per SOT8015 footprint.
Technical Context
This discrete NPN bipolar junction transistor operates as a low-voltage, medium-current switch or linear amplifier with base-emitter turn-on voltage ≤1.2 V and collector-emitter saturation voltage ≤700 mV at IC = 500 mA / IB = 50 mA. Its 100 MHz fT supports moderate-speed digital and analog signal handling.
The device uses a thermally enhanced DFN1110D-3 package with side-wettable flanks, enabling automated optical inspection of solder joints and achieving 460 mW total power dissipation on 70 μm copper FR4 PCBs - critical for space-constrained automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage under open-base condition; defines voltage headroom in 12 V/24 V automotive supply rails. |
| IC | 500 mA continuous - Sustained collector current rating at 25 °C ambient; supports driving small relays or LEDs directly. |
| hFE | 160–400 at VCE = 1 V, IC = 100 mA - Guaranteed DC current gain range enables predictable base drive sizing without margin overdesign. |
| VCE(sat) | ≤700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications. |
| Ptot | 460 mW on FR4 with 70 μm copper - Thermal performance enables operation without heatsinking in compact PCB layouts. |
| Rth(j-a) | 272 K/W - Junction-to-ambient thermal resistance determines temperature rise per watt; critical for reliability in sealed enclosures. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors, supporting use in non-safety-critical vehicle systems. |
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 and optimized thermal conduction via exposed die pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires ~50 mA base drive to saturate at 500 mA collector current - sets minimum MCU GPIO drive capability. |
| 2 | Emitter | Current return path; internally connected to substrate; must be routed to low-impedance ground plane for stable switching. |
| 3 | Collector | High-side load connection point; rated for 45 V breakdown - suitable for 12 V battery-switched loads with surge margin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive environments including temperature cycling, humidity bias, and mechanical shock - reduces qualification effort for Tier 1 suppliers. |
| Side-wettable flanks | Enables 100% automated optical inspection of solder fillets without X-ray - improves manufacturing yield in high-volume SMT lines. |
| 0.5 mm package height | Reduces board stack height by >60% vs. SOT23 - essential for slim infotainment modules and sensor housings with tight Z-axis constraints. |
| Three hFE variants | BC817-16QB (100–250), BC817-25QB (160–400), BC817-40QB (250–600) allow precise gain binning to match circuit stability and drive requirements. |
| 460 mW Ptot on 70 μm FR4 | Eliminates need for thermal vias or copper pours in cost-sensitive designs while maintaining Tj < 125 °C at 300 mW dissipation. |
Applications
| Automotive Body Control Unit | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Switching 12 V LED arrays in door modules and interior lighting. IC Role / Device Role / Timing Role: NPN switch controlling current path between load and ground; driven by 3.3 V microcontroller GPIO with resistor-limited base current. Use Value: 700 mV VCE(sat) limits power loss to <150 mW at 500 mA, reducing thermal load in sealed plastic housings. |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor networks) into ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower amplifier providing low-output-impedance drive while isolating sensitive analog front-end from noisy digital sections. Use Value: 160–400 hFE ensures stable biasing across temperature; 100 MHz fT preserves signal integrity up to 10 kHz bandwidth. |
| Consumer Appliance Motor Driver | Medical Diagnostic Equipment |
|
Use Scenario: Driving small brushed DC motors (<5 W) in smart home appliances like HVAC dampers and coffee grinders. IC Role / Device Role / Timing Role: Low-side switch in H-bridge half-bridge configuration; paired with complementary PNP or MOSFET for bidirectional control. Use Value: 1 A ICM peak rating handles motor startup surges; 45 V VCEO accommodates back-EMF spikes without clamping diodes. |
Use Scenario: Isolating and amplifying low-level biopotential signals (e.g., ECG front-end gain stages) before digitization. IC Role / Device Role / Timing Role: Discrete transistor in low-noise common-emitter amplifier stage; selected for consistent hFE binning to minimize gain drift. Use Value: AEC-Q101 qualification correlates with high-reliability process controls, supporting long-term calibration stability in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN switching and amplification applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-25,115 (SOT23) | Same electrical specs but in larger SOT23 package (2.9 × 1.3 × 1.0 mm); no side-wettable flanks; Rth(j-a) = 350 K/W. | Lacks AOI support and thermal performance; unsuitable for automotive production lines requiring solder-joint inspection. | Select only for legacy designs where SOT23 footprint exists and AOI is not required. |
| MMBT2222ALT1G (SOT23) | Higher VCEO (40 V), lower hFE (100–300), same 500 mA IC; not AEC-Q101 qualified; Rth(j-a) ≈ 300 K/W. | Not certified for automotive use; higher VCE(sat) (~1 V) increases conduction loss in battery-powered systems. | Acceptable for industrial or consumer applications where qualification and thermal efficiency are secondary. |
Compared with BC817-25QBZ, the SOT23 alternatives trade AOI compatibility, thermal performance, and automotive qualification for broader distributor availability - making BC817-25QBZ the optimal choice when manufacturability, reliability, and space constraints are prioritized.
Availability
BC817-25QBZ is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interfaces, and consumer appliance motor drivers requiring stable component supply, AEC-Q101 compliance, and ultra-compact packaging.
Supply support for BC817-25QBZ 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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
The BC817QB series belongs to Nexperia's AEC-Q101 qualified general-purpose transistor product line, engineered specifically for space-constrained automotive and industrial applications demanding robustness, AOI compatibility, and thermal efficiency.
FAQ
What is the maximum allowable junction temperature for BC817-25QBZ?
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 is required above 25 °C ambient - for example, at 85 °C ambient, maximum usable power drops to ~250 mW based on the 272 K/W thermal resistance.
Does BC817-25QBZ require a heatsink in typical applications?
No heatsink is required for BC817-25QBZ in standard applications dissipating ≤300 mW on FR4 with 70 μm copper, as its 272 K/W Rth(j-a) yields a junction-to-ambient rise of ~82 °C - keeping Tj below 125 °C at 85 °C ambient. Thermal vias or copper pours are optional for margin.
How does the side-wettable flank design impact soldering yield?
The side-wettable flank allows automated optical inspection (AOI) systems to verify solder fillet formation on all three terminals without X-ray. This increases first-pass yield by detecting insufficient solder, bridging, or misalignment early - critical for automotive production where zero-defect targets apply.
Can BC817-25QBZ replace BC817-25 in existing SOT23 designs?
No direct replacement is possible due to incompatible footprints: BC817-25QBZ uses DFN1110D-3 (1.1 × 1.0 mm), while BC817-25 uses SOT23 (2.9 × 1.3 mm). Layout redesign and stencil revision are required. Electrical parameters are matched, but thermal and AOI benefits are only realized with the new package.
BC817-25QBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817QB
- 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:
- 350 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1110D-3
BC817-25QBZ FAQ
1.How can I place an order for BC817-25QBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25QBZ 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 BC817-25QBZ reliable?
The price and inventory of BC817-25QBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25QBZ is usually 5 days.
3.What payment methods are accepted for BC817-25QBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25QBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25QBZ?
BC817-25QBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25QBZ 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 BC817-25QBZ?
For technical support, including BC817-25QBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25QBZ requirements.
6.How does Aetrix verify that BC817-25QBZ is sourced from the original manufacturer or authorized distributors?
All BC817-25QBZ 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 BC817-25QBZ meets industry standards.
7.What is the process for return or replacement of BC817-25QBZ?
All BC817-25QBZ units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25QBZ, 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 BC817-25QBZ part is unused and in its original packaging.
Return procedure for BC817-25QBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25QBZ Tags
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MMBT3906LT1G
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
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MMBT2222A-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
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