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Nexperia USA Inc. BC817-QVL
- Part No.:
- BC817-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-QVL.pdf
- Description:
- TRANS NPN 45V 0.5A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,375
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Product details
Overview
BC817-Q from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT23 (TO-236AB) package, designed for switching and amplification in automotive-grade circuits. It delivers DC current gain (hFE) of 100–600 at VCE = 1 V, IC = 100 mA, supports peak collector current up to 1 A, and is qualified to AEC-Q101 for under-hood control modules.
For engineers reviewing the BC817-Q datasheet, BC817-Q pinout, BC817-Q application, or BC817-Q equivalent, key selection criteria include its 45 V VCEO, 500 mA continuous IC, SOT23 thermal performance (Rth(j-a) = 500 K/W on standard FR4), and AEC-Q101 qualification for automotive power management and signal conditioning.
Technical Context
This NPN bipolar junction transistor operates as a low-voltage, medium-current switch or linear amplifier with base-controlled conduction. Its VCE(sat) ≤ 700 mV at IC = 500 mA / IB = 50 mA ensures efficient saturation in digital logic interfaces and load drivers.
Thermal design is constrained by junction-to-ambient resistance (500 K/W standard footprint; 362 K/W with 1 cm² collector pad) and maximum Tj = 150 °C, requiring PCB copper area planning for sustained 500 mA operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 12 V/24 V automotive supply rails. |
| IC (continuous) | 500 mA - Continuous collector current rating; supports relay drivers, LED arrays, and sensor interface loads. |
| hFE | 100–600 - DC current gain at VCE = 1 V, IC = 100 mA; enables stable biasing across temperature for analog amplification. |
| VCE(sat) | ≤ 700 mV - Collector-emitter saturation voltage at IC = 500 mA / IB = 50 mA; minimizes power loss in switching applications. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; supports audio-frequency amplification and fast digital switching. |
| Rth(j-a) | 500 K/W - Junction-to-ambient thermal resistance on standard FR4; determines required PCB copper area for thermal management. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.1 mm footprint, 0.45 mm nominal thickness, and gull-wing lead form for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires ~50 mA drive for full 500 mA collector conduction. |
| 2 | Emitter (E) | Common reference terminal; connected to ground or low-side return path in switching configurations. |
| 3 | Collector (C) | High-current output node; carries load current and dissipates heat; thermally coupled to PCB copper pad. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per Stress Test Qualification for Discrete Semiconductors; supports under-hood temperature cycling and humidity exposure. |
| Three hFE selections | BC817-16-Q (100–250), BC817-25-Q (160–400), BC817-40-Q (250–600); enables precise gain matching in production batches. |
| Low VCE(sat) | ≤ 700 mV at IC/IB = 10; reduces conduction loss in high-duty-cycle switching like PWM motor control. |
| High fT | 100 MHz; allows stable operation in audio preamplifiers and fast-switching logic buffers without oscillation. |
Applications
| Automotive Door Module Control | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving window lift motor relays and door lock solenoids in 12 V vehicle architectures. IC Role / Device Role / Timing Role: NPN switch controlling 300–500 mA inductive loads via microcontroller GPIO. Use Value: 45 V VCEO withstands load-dump transients; AEC-Q101 ensures reliability over 15-year vehicle lifetime. |
Use Scenario: Amplifying low-level analog outputs from pressure or temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Linear amplifier stage with stable hFE across –40 °C to +125 °C ambient. Use Value: 100–600 hFE range enables consistent gain calibration; low VBE drift (–2 mV/K) maintains accuracy. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Interface |
|
Use Scenario: Enabling sequential power-up of subsystems (display, MCU, comms) in smart home appliances. IC Role / Device Role / Timing Role: Low-side switch enabling 500 mA rail sequencing with tight timing control. Use Value: 700 mV VCE(sat) limits voltage drop during startup; SOT23 footprint saves board space in compact designs. |
Use Scenario: Isolating and buffering analog signals between patient-connected sensors and ADC front-ends. IC Role / Device Role / Timing Role: Emitter-follower buffer providing low-output-impedance drive to 12-bit ADC inputs. Use Value: 100 MHz fT preserves signal integrity up to 100 kHz bandwidth; low Cc = 3 pF minimizes capacitive loading. |
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 |
|---|---|---|---|
| BC847B-Q | Lower VCEO (45 V same), lower IC (100 mA), higher hFE (200–450), smaller die size | Optimized for low-power signal amplification, not 500 mA switching | Select BC847B-Q only when load current remains below 100 mA and gain stability at low IC is critical. |
| MMBT3904LT1G | Same VCEO (40 V), same IC (200 mA), hFE 100–300, non-AEC-Q101 rated | Lacks automotive qualification; suitable for commercial-grade consumer electronics only | Choose MMBT3904LT1G for cost-sensitive non-automotive designs where AEC-Q101 compliance is unnecessary. |
Compared with BC817-Q, BC847B-Q trades current capacity for tighter hFE tolerance in low-power roles, while MMBT3904LT1G offers identical topology but no automotive qualification-making BC817-Q the sole choice for AEC-Q101–mandated 500 mA switching.
Availability
BC817-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for BC817-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-enhancing components, delivering high-volume, high-reliability discrete and logic devices.
The BC817-Q belongs to Nexperia's AEC-Q101–qualified general-purpose transistor product line, engineered specifically for robust switching and amplification in automotive and industrial environments where thermal stability and long-term reliability are critical.
FAQ
What is the maximum allowable junction temperature for BC817-Q?
The absolute maximum junction temperature (Tj) for BC817-Q is 150 °C. Operation above this limit risks permanent degradation of hFE and increased leakage currents. Thermal design must ensure that power dissipation-calculated from VCE(sat) × IC and Rth(j-a)-keeps Tj within specification across ambient extremes from –65 °C to +150 °C.
Does BC817-Q require external base resistors in switching applications?
Yes-BC817-Q requires an external base resistor to limit IB and ensure proper saturation. For 500 mA collector current with hFE ≥ 100, minimum IB = 5 mA is needed; using a 1 kΩ resistor with 5 V drive yields 5 mA, achieving reliable VCE(sat) ≤ 700 mV. Undersized resistors cause excessive base current and thermal stress.
How does the BC817-Q series differ from the standard BC817 family?
The BC817-Q series adds AEC-Q101 qualification, extended temperature validation (–65 °C to +150 °C), and enhanced process controls for automotive production. Unlike standard BC817 parts, Q-series units undergo rigorous stress testing including HTRB, HTSL, and temperature cycling, and carry specific marking codes (e.g., "6D%") for traceability in safety-critical systems.
Can BC817-Q be used in linear amplifier configurations?
Yes-BC817-Q supports linear operation with verified hFE stability from IC = 1 mA to 500 mA and fT = 100 MHz. Its VBE temperature coefficient (–2 mV/K) and low Cc (3 pF) enable predictable gain and bandwidth in common-emitter and emitter-follower topologies, provided thermal management prevents junction overheating at sustained power levels.
BC817-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817-Q
- 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:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC817-QVL FAQ
1.How can I place an order for BC817-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-QVL 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-QVL reliable?
The price and inventory of BC817-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-QVL is usually 5 days.
3.What payment methods are accepted for BC817-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-QVL?
BC817-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-QVL 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-QVL?
For technical support, including BC817-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-QVL requirements.
6.How does Aetrix verify that BC817-QVL is sourced from the original manufacturer or authorized distributors?
All BC817-QVL 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-QVL meets industry standards.
7.What is the process for return or replacement of BC817-QVL?
All BC817-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BC817-QVL, 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-QVL part is unused and in its original packaging.
Return procedure for BC817-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-QVL Tags
-
MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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