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Nexperia USA Inc. BC817-25W-QF
- Part No.:
- BC817-25W-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC817-25W-QF.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:6,159
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Product details
Overview
BC817-25W-QF from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V VCEO, 500 mA IC, and DC current gain (hFE) of 160–400 at VCE = 1 V, IC = 100 mA; used for automotive-grade switching and amplification in compact PCB space-constrained modules.
For engineers reviewing the BC817-25W-QF datasheet, BC817-25W-QF pinout, BC817-25W-QF application, or BC817-25W-QF equivalent, this page delivers verified electrical parameters, thermal derating behavior, automotive qualification status, and real-world switching performance under pulsed and continuous conditions.
Technical Context
This discrete NPN bipolar junction transistor operates with a maximum collector-emitter breakdown voltage of 45 V and supports peak collector current up to 1 A in single-pulse mode (tp ≤ 1 ms). Its base-emitter saturation voltage is specified at ≤1.2 V and collector-emitter saturation voltage at ≤700 mV under IC = 500 mA / IB = 50 mA conditions.
The device exhibits fT = 100 MHz at VCE = 5 V, IC = 10 mA, enabling use in medium-frequency signal amplification. Thermal resistance Rth(j-a) is 431 K/W when mounted on FR4 PCB with 1 cm² collector pad, supporting stable operation up to Tj = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility in 24 V automotive and industrial supply circuits. |
| IC | 500 mA - Continuous DC collector current rating; supports load switching up to ~12 W at 24 V with appropriate heatsinking. |
| hFE | 160–400 - Guaranteed DC current gain range at VCE = 1 V, IC = 100 mA; enables predictable base drive design for digital logic-level control. |
| VCE(sat) | ≤700 mV - Low saturation voltage at IC = 500 mA / IB = 50 mA; minimizes conduction loss and self-heating in high-duty-cycle switching. |
| Ptot | 290 mW - Max power dissipation with enhanced thermal pad (1 cm²); 33% higher than standard footprint version, improving reliability in thermally dense layouts. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; supports small-signal amplification up to mid-VHF band without gain roll-off. |
| Cc | 3 pF - Collector capacitance at VCB = 10 V; low parasitic capacitance preserves bandwidth and reduces Miller effect in amplifier stages. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: ultra-compact 3-pin outline measuring 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for high-density automotive PCBs and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal accepting low-current input (e.g., MCU GPIO or logic buffer) to modulate collector current flow. |
| 2 | Emitter (E) | Common reference node tied to ground or low-side return path; forms current sink configuration in typical switching applications. |
| 3 | Collector (C) | High-current output terminal connected to load (e.g., relay coil, LED string, or sensor bias); carries full switched current. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−40 °C to +150 °C) and stress testing; eliminates need for additional qualification in Tier-1 ECU designs. |
| Three hFE bins | BC817-25W-QF provides 160–400 hFE binning-tighter than generic transistors-reducing base resistor tolerance sensitivity in production assemblies. |
| Low VCE(sat) | ≤700 mV at IC/IB = 10 ensures minimal voltage drop across transistor during saturation, critical for battery-powered systems with tight headroom. |
| Enhanced thermal pad | 290 mW Ptot rating with 1 cm² collector copper area improves thermal stability over standard SOT323 variants, extending lifetime in sealed enclosures. |
| SC-70 footprint compatibility | Standard JEDEC SC-70 land pattern (Fig. 17) enables drop-in replacement in existing layouts without redesign; supports reflow and wave soldering. |
Applications
| Automotive Door Module | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Driving window lift motor relays and door lock solenoids in body control modules. IC Role / Device Role / Timing Role: NPN switch controlling 12 V/300 mA inductive loads via microcontroller GPIO with 5 V logic level. Use Value: 45 V VCEO withstands load-dump transients; AEC-Q101 qualification ensures 15-year field reliability per ISO 16750-2. |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., pressure, temp) into ADC inputs of PLC I/O cards. IC Role / Device Role / Timing Role: Small-signal amplifier configured in common-emitter topology with fixed-gain bias network. Use Value: 100 MHz fT preserves signal integrity up to 10 kHz bandwidth; low Cc avoids phase shift in feedback paths. |
| Consumer Power Bank LED Driver | Medical Portable Device Fan Control |
|
Use Scenario: PWM-driven white LED backlight switching in USB-C power bank displays. IC Role / Device Role / Timing Role: High-speed saturated switch operating at 1–5 kHz PWM with <1 µs turn-on/off times. Use Value: ≤700 mV VCE(sat) limits power loss to <0.35 W at 500 mA, reducing thermal stress in sealed plastic housing. |
Use Scenario: Controlling 5 V DC cooling fan speed in handheld ultrasound probes requiring low EMI and silent operation. IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter degeneration resistor for precise 100–400 mA fan current control. Use Value: 160–400 hFE bin ensures consistent current regulation across production batches without calibration. |
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 |
|---|---|---|---|
| BC817-25-7-F (Diodes Inc.) | Same hFE bin (160–400), but only qualified to JESD22-A108 (not AEC-Q101); Rth(j-a) = 625 K/W on standard footprint. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules without additional validation. | Select only for cost-sensitive consumer or industrial non-automotive designs where AEC compliance is not required. |
| MMBT3904LT1G (ON Semi) | Lower VCEO = 40 V, hFE = 100–300, and no AEC-Q101 certification; identical SOT-23 package (not SOT323). | Requires PCB footprint change; lower voltage margin increases risk of failure during 12 V system load dump events. | Use only if board redesign is acceptable and automotive qualification is unnecessary; verify layout clearance for SOT-23 vs SOT323. |
Compared with BC817-25W-QF, BC817-25-7-F offers identical gain but lacks automotive qualification and thermal performance, while MMBT3904LT1G requires footprint change and sacrifices 5 V voltage margin-making BC817-25W-QF the optimal choice for space-constrained, AEC-compliant switching in 12/24 V systems.
Availability
BC817-25W-QF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical devices, and consumer power management systems requiring stable component supply across multi-year production cycles.
Supply support for BC817-25W-QF 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 essential semiconductors-including logic, discretes, MOSFETs, and ESD protection-serving automotive, industrial, and mobile markets.
The BC817W-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for robust, low-cost switching and amplification in harsh-environment automotive ECUs and industrial controllers.
FAQ
Is BC817-25W-QF pin-compatible with standard SOT-23 transistors?
No. BC817-25W-QF uses the smaller SOT323 (SC-70) package-2.2 mm × 1.35 mm-with 0.65 mm lead pitch, whereas SOT-23 measures 2.9 mm × 1.3 mm with 0.95 mm pitch. Physical mounting and solder stencil must be redesigned; direct replacement is not possible without layout modification.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current is 200 mA (single pulse, tp ≤ 1 ms), but for continuous DC operation, IB must be limited to ensure junction temperature stays within 150 °C. At IC = 500 mA and hFE = 160, recommended IB is ≥3.125 mA; practical design uses 5–10 mA to guarantee saturation across temperature and process variation.
Does BC817-25W-QF support linear (analog) operation, or is it intended only for switching?
It supports both modes. The datasheet specifies VBE = 1.2 V and hFE characteristics across IC = 100 µA to 500 mA, confirming usable linear gain. However, power dissipation must be strictly managed: at VCE = 10 V and IC = 20 mA, PD = 200 mW exceeds the 290 mW limit only near Tamb = 25 °C-derating is mandatory above 50 °C ambient.
How does the "QF" suffix differ from standard "Q" in BC817-25W-Q?
The "QF" suffix denotes Nexperia's "Qualified for Automotive" variant-identical electrically and physically to BC817-25W-Q-but supplied with full AEC-Q101 test reports, lot-level traceability, and extended reliability data per IATF 16949. It is not a different die or package; it is a certified supply chain grade for automotive OEMs.
BC817-25W-QF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC817W-Q
- Package/Case:
- SC-70, SOT-323
- 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:
- 160 @ 100mA, 1V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC817-25W-QF FAQ
1.How can I place an order for BC817-25W-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25W-QF 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 BC817-25W-QF reliable?
The price and inventory of BC817-25W-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25W-QF is usually 5 days.
3.What payment methods are accepted for BC817-25W-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25W-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25W-QF?
BC817-25W-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25W-QF 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 BC817-25W-QF?
For technical support, including BC817-25W-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25W-QF requirements.
6.How does Aetrix verify that BC817-25W-QF is sourced from the original manufacturer or authorized distributors?
All BC817-25W-QF 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 BC817-25W-QF meets industry standards.
7.What is the process for return or replacement of BC817-25W-QF?
All BC817-25W-QF units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25W-QF, 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 BC817-25W-QF part is unused and in its original packaging.
Return procedure for BC817-25W-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25W-QF Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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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
onsemi
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BC847B,215
Nexperia USA Inc.
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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