My Inquiry
My Account
Diodes Incorporated BC817-25Q-7-F
- Part No.:
- BC817-25Q-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-25Q-7-F.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:38,983
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BC817-25Q-7-F from Diodes Incorporated is an AEC-Q101 qualified 45V NPN bipolar junction transistor in SOT23 package, delivering hFE = 160–400 at IC = 100mA, VCE = 1.0V, with 500mA continuous collector current and 4kV HBM ESD rating - used in automotive body control modules for load switching and signal amplification.
For engineers reviewing the BC817-25Q-7-F datasheet, BC817-25Q-7-F pinout, BC817-25Q-7-F application, or BC817-25Q-7-F equivalent, key selection criteria include DC current gain binning (25Q), thermal resistance (RθJA = 403°C/W), automotive qualification status, and SOT23 lead-free terminal finish compatibility with reflow profiles.
Technical Context
This NPN BJT employs epitaxial planar die construction for stable gain and low leakage across -65°C to +150°C operating range. Its 45V VCEO, 1A ICM, and 0.7V VCE(sat) at IC = 500mA / IB = 50mA support robust switching in 12V/24V automotive subsystems.
The device is optimized for automatic insertion and operates with 5.0V VEBO and 12pF CCBO at 10V, enabling use in AF amplifiers and digital logic interface circuits where predictable turn-on and low capacitance are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown in switching applications |
| hFE (IC = 100mA) | 160–400 - Confirmed DC current gain bin for BC817-25Q, enabling precise base drive sizing |
| IC (continuous) | 0.5 A - Sustained collector current capability under 25°C ambient with standard PCB layout |
| VCE(sat) | ≤ 0.7 V @ IC = 500mA, IB = 50mA - Low saturation voltage minimizes power loss in high-duty-cycle switches |
| RθJA | 403 °C/W - Thermal resistance defining junction-to-ambient temperature rise on minimal FR-4 copper |
| ESD HBM | 4,000 V - Robust electrostatic discharge immunity per JEDEC JESD22-A114, critical for assembly handling |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including temperature cycling and HTOL |
Pinout & Package
Package: SOT23 - Molded green plastic housing (UL 94V-0), 0.008g weight, matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-side return path; defines reference for base-emitter biasing |
| 2 (Base) | Control input | Receives current-limited drive to enable saturation; requires external series resistor for digital logic interfacing |
| 3 (Collector) | Current source terminal | Switches load between supply rail and emitter; thermally coupled to PCB pad via lead (RθJL = 350°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing certification |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) compliant with RoHS 3 |
| High pulse current rating | 1.0A ICM enables short-duration inrush current handling in relay or solenoid drivers |
| Low VCE(sat) | ≤0.7V at rated IC/IB reduces conduction loss and self-heating in 12V power distribution nodes |
| Complementary PNP pairing | Direct match with BC807-25Q for push-pull output stages and differential amplifier inputs |
Applications
| Automotive Door Module | LED Tail Light Driver |
|---|---|
Use Scenario: Switching window lift motor direction and lock/unlock solenoids in centralized body control unit. IC Role / Device Role / Timing Role: NPN switch controlling 12V loads via microcontroller GPIO with current-limiting base resistor. Use Value: 45V VCEO withstands load dump transients; AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime. |
Use Scenario: Driving segmented LED arrays in rear combination lamps with PWM dimming. IC Role / Device Role / Timing Role: Low-side constant-current switch synchronized to MCU PWM output for brightness control. Use Value: 0.7V VCE(sat) minimizes voltage drop across current-sense resistor; 400MHz fT supports clean PWM edge response. |
| Industrial Sensor Interface | Consumer Appliance Control Board |
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 signal conditioning. Use Value: hFE ≥160 ensures stable gain across temperature; 5nA ICES prevents leakage-induced offset drift. |
Use Scenario: Controlling small AC motors and indicator LEDs in washing machine control panels. IC Role / Device Role / Timing Role: General-purpose switching element driven by 3.3V/5V logic outputs. Use Value: SOT23 footprint enables high-density PCB layout; RoHS 3 compliance meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC817-25,115 (Nexperia) | Same hFE bin (160–400), but not AEC-Q101 qualified; RθJA = 450°C/W | Limited to industrial/commercial use; unsuitable for automotive safety-critical functions | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| MMBT2222ALT1G (onsemi) | Higher VCEO (40V vs. 45V), lower hFE min (100), same SOT23 package | Used in legacy consumer designs; lacks automotive change control and PPAP documentation | Choose only for backward compatibility in non-automotive upgrades where gain tolerance is relaxed |
Compared with BC817-25Q-7-F, the Nexperia part offers identical gain performance without automotive validation, while the onsemi MMBT2222ALT1G trades 5V headroom and tighter gain control for broader legacy design support - making BC817-25Q-7-F the sole choice for new AEC-Q101-compliant systems requiring guaranteed 45V operation and documented process control.
Availability
BC817-25Q-7-F is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting control, industrial sensor interfaces, and appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BC817-25Q-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.
The BC817-Q series belongs to Diodes' automotive-qualified small-signal transistor product line, engineered specifically for robust switching and amplification in harsh-environment electronic control units.
FAQ
What does the "Q" suffix signify in BC817-25Q-7-F?
The "Q" suffix denotes Diodes Incorporated's automotive-grade qualification: AEC-Q101 stress-tested, manufactured in IATF 16949-certified facilities, and supported with PPAP documentation. It is not a package or marking code - it confirms full automotive change control, lot traceability, and zero-defect manufacturing protocols.
Can BC817-25Q-7-F replace BC817-25 in existing designs?
Yes, mechanically and electrically compatible in SOT23 footprint, but BC817-25Q-7-F adds AEC-Q101 qualification, green compound, and tighter process controls. For automotive production, replacement requires revalidation of thermal performance and PPAP submission due to updated material composition and test coverage.
What is the maximum allowable PCB temperature rise during continuous 500mA operation?
At IC = 500mA and TA = 25°C, power dissipation is ~350mW (VCE(sat) × IC). With RθJA = 403°C/W, junction temperature rise is ~141°C - exceeding 150°C max rating. Derating to ≤300mA or using enhanced copper layout (RθJA = 357°C/W) is required for sustained operation.
Is the SOT23 marking "K6B" sufficient to identify BC817-25Q-7-F on board?
Yes - "K6B" is the official top-side marking per Diodes' ordering information table. It uniquely identifies BC817-25Q in SOT23, distinguishing it from BC817-16Q (K6A) and BC817-40Q (K6C); no additional date code or batch identifier is needed for functional identification.
BC817-25Q-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:
- 160 @ 100mA, 1V
- Power - Max:
- 350 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
BC817-25Q-7-F FAQ
1.How can I place an order for BC817-25Q-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25Q-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 BC817-25Q-7-F reliable?
The price and inventory of BC817-25Q-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 BC817-25Q-7-F is usually 5 days.
3.What payment methods are accepted for BC817-25Q-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25Q-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25Q-7-F?
BC817-25Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25Q-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 BC817-25Q-7-F?
For technical support, including BC817-25Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25Q-7-F requirements.
6.How does Aetrix verify that BC817-25Q-7-F is sourced from the original manufacturer or authorized distributors?
All BC817-25Q-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 BC817-25Q-7-F meets industry standards.
7.What is the process for return or replacement of BC817-25Q-7-F?
All BC817-25Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25Q-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 BC817-25Q-7-F part is unused and in its original packaging.
Return procedure for BC817-25Q-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25Q-7-F 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
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
