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Diodes Incorporated BC817-40Q-7-F
- Part No.:
- BC817-40Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-40Q-7-F.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:20,608
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Product details
Overview
BC817-40Q-7-F from Diodes Incorporated is an AEC-Q101 qualified 45V NPN bipolar junction transistor in SOT23 package, delivering hFE = 250–600 at IC = 100mA, VCE = 1.0V, with 500mA continuous collector current and 8kV HBM ESD rating. It serves as a switching and audio-frequency amplifier device in automotive body control modules, LED driver stages, and sensor interface circuits.
For engineers reviewing the BC817-40Q-7-F datasheet, BC817-40Q-7-F pinout, BC817-40Q-7-F application, or BC817-40Q-7-F equivalent, key selection criteria include DC current gain spread (250–600), VCE(sat) ≤ 0.7V at 500mA/50mA drive, thermal resistance of 357°C/W on 15mm×15mm copper, and automotive-grade change control compliance.
Technical Context
This NPN BJT uses epitaxial planar die construction for stable gain and low leakage, supporting linear amplification and saturated switching modes. Its BVCEO = 45V and VEBO = 5.0V enable robust operation in 12V/24V automotive supply rails with reverse-biased base-emitter protection.
The device operates across –65°C to +150°C with J-STD-020 Level 1 moisture sensitivity and is manufactured in IATF 16949 certified facilities. Its fT = 100MHz supports AF and low-speed digital signal conditioning up to ~10MHz switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45V - Supports full operation in 24V automotive systems with margin against load dump transients |
| hFE (IC = 100mA) | 250–600 - Enables precise biasing in amplifier stages and predictable saturation in switch drivers |
| VCE(sat) | ≤ 0.7V @ IC = 500mA, IB = 50mA - Limits conduction loss to <350mW in high-current switching |
| PD | 350mW @ 15mm×15mm 1oz Cu - Defines maximum steady-state power handling on standard PCB layout |
| RθJA | 357°C/W - Determines junction temperature rise of ~126°C above ambient at full power dissipation |
| ESD HBM | 8,000V - Meets IEC 61000-4-2 Level 4 for system-level ESD immunity in exposed interfaces |
| fT | 100MHz - Supports audio-band amplification and clean square-wave switching up to 10MHz |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads, UL 94V-0 rated molding compound, and 0.008g mass. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; requires low-impedance trace for stable bias |
| 2 (Base) | Control input | Driven by MCU GPIO or logic buffer; 100kΩ pull-down recommended for default-off state |
| 3 (Collector) | Current source terminal | Connected to load (e.g., relay coil, LED string); routed with thermal relief for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and change-controlled manufacturing |
| Green compound & RoHS compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), fully lead-free per EU directives |
| Epitaxial planar die | Ensures tight hFE distribution and low leakage (ICES ≤ 5nA @ 25°C) |
| ICM = 1A peak pulse | Supports inrush current handling in relay and solenoid drive without secondary protection |
Applications
| Automotive Body Control Unit | LED Driver Stage |
|---|---|
Use Scenario: Driving window lift motor relays and door lock actuators in 12V vehicle architectures. IC Role / Device Role / Timing Role: NPN switch controlling 500mA inductive loads with flyback diode integration. Use Value: Low VCE(sat) minimizes heat generation during sustained actuation; AEC-Q101 ensures reliability over 15-year vehicle life. | Use Scenario: Constant-current dimming of interior map lights and dashboard backlighting. IC Role / Device Role / Timing Role: Linear current regulator stage with PWM-controlled base drive. Use Value: Tight hFE tolerance enables consistent LED brightness across production batches without calibration. |
| Sensor Signal Conditioning | Industrial PLC Input Interface |
Use Scenario: Amplifying low-level analog outputs from temperature and pressure sensors in engine bay modules. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed-gain bias network. Use Value: fT = 100MHz preserves signal integrity up to 10kHz bandwidth; wide TJ range maintains gain stability at +125°C. | Use Scenario: Isolating 24V DC field inputs into 3.3V/5V microcontroller logic in factory automation controllers. IC Role / Device Role / Timing Role: Level-shifting switch translating industrial voltage thresholds to safe logic levels. Use Value: 45V VCEO withstands common-mode surges; 8kV HBM protects against ESD events on unshielded I/O traces. |
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 |
|---|---|---|---|
| BC817-25Q-7-F | hFE = 160–400 (lower mid-range gain) | Better suited for designs requiring tighter gain consistency at moderate currents (10–100mA) | Select when lower base drive current or reduced gain variation is prioritized over maximum current gain |
| MMBT4401-7-F | hFE = 100–300, VCEO = 40V, higher RθJA = 403°C/W | Limited to non-automotive or lower-temperature environments due to narrower voltage and thermal margin | Use only in cost-sensitive consumer applications where AEC-Q101 and 45V rating are not required |
Compared with BC817-25Q-7-F and MMBT4401-7-F, the BC817-40Q-7-F provides highest hFE for minimal base drive in high-current switching, widest VCEO margin for automotive transients, and lowest thermal resistance on optimized PCBs-making it optimal for demanding automotive and industrial control nodes.
Availability
BC817-40Q-7-F is available at Aetrix Electronics and suitable for automotive body control units, LED driver stages, sensor signal conditioning circuits, and industrial PLC input interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BC817-40Q-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certification.
The BC817-Q series belongs to Diodes' automotive-qualified small-signal transistor portfolio, designed specifically for AEC-Q101 compliance, PPAP readiness, and seamless integration into space-constrained, thermally demanding vehicle subsystems.
FAQ
What is the maximum continuous collector current for BC817-40Q-7-F?
The BC817-40Q-7-F supports 500mA continuous collector current (IC) at TA = +25°C with derating to zero at +150°C. This rating assumes operation on a 15mm×15mm 1oz copper pad; actual current must be reduced under higher ambient temperatures or smaller copper areas per the published derating curve.
Is BC817-40Q-7-F suitable for linear amplifier applications?
Yes - its hFE = 250–600 at IC = 100mA and fT = 100MHz support stable small-signal amplification in audio-frequency and sensor signal conditioning circuits. The device exhibits low output capacitance (CCBO = 12pF) and predictable VBE = 1.2V at IC = 300mA, enabling accurate bias design.
Does BC817-40Q-7-F require external ESD protection in automotive designs?
No - it features 8,000V HBM ESD rating per JEDEC JESD22-A114, exceeding typical automotive I/O requirements. However, system-level protection (e.g., TVS diodes) remains recommended for direct exposure to external connectors subject to ISO 10605 discharge events.
How does the BC817-40Q-7-F differ from the standard BC817-40 series?
The "Q" suffix denotes AEC-Q101 qualification, PPAP capability, IATF 16949 manufacturing, and automotive-specific change control - unlike commercial-grade BC817-40 parts. It also carries stricter lot traceability, extended temperature validation (–65°C to +150°C), and green/halogen-free packaging compliant with automotive OEM material declarations.
BC817-40Q-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- 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
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 250 @ 100mA, 1V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC817-40Q-7-F FAQ
1.How can I place an order for BC817-40Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-40Q-7-F 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 BC817-40Q-7-F reliable?
The price and inventory of BC817-40Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-40Q-7-F is usually 5 days.
3.What payment methods are accepted for BC817-40Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-40Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-40Q-7-F?
BC817-40Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-40Q-7-F 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 BC817-40Q-7-F?
For technical support, including BC817-40Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-40Q-7-F requirements.
6.How does Aetrix verify that BC817-40Q-7-F is sourced from the original manufacturer or authorized distributors?
All BC817-40Q-7-F 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 BC817-40Q-7-F meets industry standards.
7.What is the process for return or replacement of BC817-40Q-7-F?
All BC817-40Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC817-40Q-7-F, 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 BC817-40Q-7-F part is unused and in its original packaging.
Return procedure for BC817-40Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-40Q-7-F Tags
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