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Nexperia USA Inc. BC817K-16H-QR
- Part No.:
- BC817K-16H-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817K-16H-QR.pdf
- Description:
- TRANS NPN 45V 0.5A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BC817K-16H-QR from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT23 package, designed for automotive-grade switching and linear amplification with hFE = 100–250 at IC = 100 mA, VCE = 1 V, and Tamb = 25 °C. It supports high-temperature operation up to 175 °C and is AEC-Q101 qualified.
For engineers reviewing the BC817K-16H-QR datasheet, BC817K-16H-QR pinout, BC817K-16H-QR application, or BC817K-16H-QR equivalent, this page delivers verified electrical specs, thermal derating behavior, automotive qualification status, SOT23 footprint details, and real-world switching/amplification use cases - all aligned to Nexperia's Rev. 1 (Oct 2023) product data sheet.
Technical Context
This discrete NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined breakdown limits: VCEO = 45 V, VCBO = 50 V, and VEBO = 7 V. Its pulsed peak collector current reaches 1 A (tp ≤ 1 ms), and DC current gain is binned to 100–250 for consistent gain matching in production circuits.
Thermal performance is characterized across four PCB mounting conditions: Rth(j-a) ranges from 158 K/W (4-layer FR4, 1 cm² collector pad) to 353 K/W (single-sided FR4, standard footprint). Junction temperature is rated to 175 °C, enabling deployment in under-hood automotive modules and industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in switch-mode applications. |
| IC | 500 mA - Continuous DC collector current at Tamb = 25 °C; sets baseline load-handling capability for driver stages. |
| hFE | 100–250 - DC current gain at VCE = 1 V, IC = 100 mA, Tamb = 25 °C; enables predictable base drive sizing. |
| VCE(sat) | ≤ 700 mV - Collector-emitter saturation voltage at IC = 500 mA, IB = 50 mA; determines conduction loss in saturated switching. |
| Ptot | 950 mW - Total power dissipation on 4-layer FR4 PCB with 1 cm² collector pad; defines thermal margin for continuous operation. |
| Tj(max) | 175 °C - Maximum junction temperature; supports operation in engine control units and motor drivers without derating below ambient. |
| AEC-Q101 | Qualified - Meets stress test requirements for discrete semiconductors in automotive applications; no additional qualification needed for Tier-1 designs. |
Pinout & Package
SOT23 plastic surface-mounted package (TO-236AB), 3-lead, 1.3 mm × 2.9 mm × 1.1 mm body, with gull-wing leads and standard reflow footprint per Fig. 44 in datasheet Rev. 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive (IB ≤ 200 mA peak) to achieve full saturation at IC = 500 mA. |
| 2 | Emitter (E) | Reference node for biasing; connected to ground or low-side return path; must be routed with low-inductance trace in switching apps. |
| 3 | Collector (C) | Load connection point; thermally coupled to PCB copper; mounting pad area directly impacts Ptot and thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE bins | BC817K-16H-QR (100–250), BC817K-25H-QR (160–400), BC817K-40H-QR (250–600) - Enables precise gain selection for analog gain stability or digital switch consistency. |
| AEC-Q101 qualification | Stress-tested per automotive discrete semiconductor standard - eliminates need for customer-level reliability requalification in automotive ECUs and ADAS modules. |
| High-temperature operation | Junction rating up to 175 °C - supports placement near heat sources (e.g., power MOSFETs, transformers) without thermal shutdown or parameter drift. |
| Low VCE(sat) | ≤ 700 mV at IC = 500 mA - reduces conduction loss by >30% vs. legacy BC817 variants, improving efficiency in 12 V/24 V load switches. |
| Standard SOT23 footprint | Compatible with industry-standard reflow and wave soldering profiles (Fig. 44/45) - enables drop-in replacement in existing layouts without redesign. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: Driving LED clusters, relays, and small solenoids in door modules and lighting controllers. IC Role / Device Role / Timing Role: Low-side switch controlling 12 V loads with PWM dimming capability up to 20 kHz. Use Value: AEC-Q101 qualification ensures lifetime reliability; 175 °C rating allows placement near MCU or CAN transceivers without thermal throttling. |
Use Scenario: Amplifying low-level signals from RTDs, thermistors, or bridge sensors before ADC input. IC Role / Device Role / Timing Role: Linear amplifier in common-emitter configuration with fixed-gain bias network. Use Value: Tight hFE binning (100–250) minimizes gain variation across temperature, reducing calibration overhead in precision sensor signal chains. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment |
Use Scenario: Optocoupler-driven feedback loop in isolated AC/DC flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Transistor switch isolating secondary-side error amplifier output to primary-side PWM controller. Use Value: Fast transition frequency (fT ≥ 100 MHz) supports stable loop response up to 500 kHz switching frequencies without phase lag. |
Use Scenario: Isolating microcontroller GPIOs from high-voltage patient monitoring circuitry (e.g., ECG lead switching). IC Role / Device Role / Timing Role: Digital buffer providing galvanic isolation and current gain for logic-level signal routing. Use Value: Low leakage (ICBO ≤ 100 nA at 25 °C) prevents false triggering in safety-critical signal paths with strict noise immunity requirements. |
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 |
|---|---|---|---|
| BC817-16,215 (Nexperia) | Same hFE range (100–250) but not AEC-Q101 qualified; Rth(j-a) = 400 K/W (standard footprint) vs. 353 K/W for BC817K-16H-QR. | Not suitable for automotive production; acceptable for consumer or industrial prototypes where qualification is not mandated. | Select when cost sensitivity outweighs automotive compliance and thermal margin is sufficient. |
| MMBT3904LT1G (onsemi) | Lower VCEO (40 V), higher hFE spread (100–300), no AEC-Q101 certification; VCE(sat) = 0.2 V typical at IC = 10 mA (not 500 mA). | Limited to <40 V systems; saturation performance degrades above 100 mA, making it unsuitable for 500 mA load switching. | Choose only for low-current (<100 mA), non-automotive signal switching where gain spread is tolerable. |
Compared with BC817-16,215, BC817K-16H-QR delivers tighter thermal resistance and automotive qualification; versus MMBT3904LT1G, it provides higher voltage headroom, validated 500 mA saturation, and guaranteed automotive reliability - critical for production-grade 12 V/24 V control systems.
Availability
BC817K-16H-QR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, consumer power adapter feedback circuits, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for BC817K-16H-QR 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 consumer markets.
BC817K-16H-QR belongs to the BC817KH-Q series - a family of AEC-Q101-qualified NPN transistors engineered specifically for robust, high-temperature switching and amplification in automotive electronics and demanding industrial environments.
FAQ
What is the maximum allowable base current for BC817K-16H-QR?
The absolute maximum peak base current is 200 mA for single pulses ≤1 ms (per Table 6). For continuous DC operation, base current should be limited to ensure IC ≤ 500 mA and VCE(sat) remains ≤700 mV - typically IB = 50 mA achieves full saturation at IC = 500 mA. Exceeding 200 mA risks permanent bond-wire damage.
Does BC817K-16H-QR support PWM switching at 100 kHz?
Yes. With fT ≥ 100 MHz (VCE = 5 V, IC = 10 mA), BC817K-16H-QR has sufficient bandwidth for clean 100 kHz PWM switching. However, switching losses increase above 50 kHz due to finite turn-on/turn-off times; layout optimization (short base/emitter traces, proper grounding) is required to maintain efficiency.
How does thermal performance change with PCB copper layers?
Rth(j-a) improves from 353 K/W (single-sided FR4) to 158 K/W (4-layer FR4 with 1 cm² collector pad), enabling ~2.2× higher continuous power dissipation. This directly extends safe operating area - e.g., Ptot rises from 425 mW to 950 mW - allowing sustained 500 mA operation without heatsinking in compact automotive modules.
Is the marking code "%HD" unique to BC817K-16H-QR?
Yes. Per Table 5, "%HD" is the official marking code for BC817K-16H-QR, where "%" is a placeholder for Nexperia's manufacturing site code. This distinguishes it from BC817K-25H-QR ("%HE") and BC817K-40H-QR ("%HF"), ensuring correct bin identification during automated optical inspection and assembly verification.
BC817K-16H-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817KH
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 100 @ 100mA, 1V
- Power - Max:
- 425 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC817K-16H-QR FAQ
1.How can I place an order for BC817K-16H-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817K-16H-QR 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 BC817K-16H-QR reliable?
The price and inventory of BC817K-16H-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817K-16H-QR is usually 5 days.
3.What payment methods are accepted for BC817K-16H-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817K-16H-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817K-16H-QR?
BC817K-16H-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817K-16H-QR 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 BC817K-16H-QR?
For technical support, including BC817K-16H-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817K-16H-QR requirements.
6.How does Aetrix verify that BC817K-16H-QR is sourced from the original manufacturer or authorized distributors?
All BC817K-16H-QR 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 BC817K-16H-QR meets industry standards.
7.What is the process for return or replacement of BC817K-16H-QR?
All BC817K-16H-QR units undergo pre-shipment inspection (PSI). If there is an issue with BC817K-16H-QR, 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 BC817K-16H-QR part is unused and in its original packaging.
Return procedure for BC817K-16H-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817K-16H-QR Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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