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Nexperia USA Inc. BC817-25W/MIX
- Part No.:
- BC817-25W/MIX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC817-25W/MIX.pdf
- Description:
- TRANS NPN 45V 0.5A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,434
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Product details
Overview
BC817-25W from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT323 (SC-70) package, designed for low-voltage switching and linear amplification in space-constrained PCBs. It delivers DC current gain (hFE) of 160–400 at VCE = 1 V and IC = 100 mA, supports 1 A peak collector current, and features 700 mV VCE(sat) at IC = 500 mA / IB = 50 mA - enabling efficient low-side switching in consumer power management circuits.
For engineers reviewing the BC817-25W datasheet, BC817-25W pinout, BC817-25W application, or BC817-25W equivalent, this page provides verified pin assignments, thermal derating curves, hFE binning details, saturation voltage behavior across temperature, and direct alternatives with documented gain and voltage trade-offs.
Technical Context
The BC817-25W operates as a silicon planar epitaxial NPN bipolar junction transistor with open-base collector-emitter breakdown voltage rated at 45 V and emitter-base breakdown at 5 V. Its hFE range (160–400) is binned specifically for mid-gain stability in bias-sensitive analog stages and digital logic interface circuits.
Thermal performance is defined for two mounting conditions: Rth(j-a) = 625 K/W on standard FR4 (single-sided copper, tin-plated), and 431 K/W with 1 cm² collector pad - directly informing PCB layout decisions for continuous 290 mW dissipation at ambient ≤25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before avalanche breakdown under open-base condition; sets upper rail limit for 3.3 V/5 V/12 V switching rails. |
| IC | 500 mA continuous - Sustained collector current capability at Tamb = 25 °C; defines load-driving capacity in relay drivers and LED arrays. |
| hFE | 160–400 at VCE = 1 V, IC = 100 mA - Mid-range DC current gain bin optimized for predictable base drive sizing without overdesign. |
| VCE(sat) | ≤700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in high-duty-cycle switching. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth up to ~10 MHz for small-signal amplification and fast digital edge handling. |
| Ptot | 290 mW with 1 cm² collector pad - Absolute maximum power dissipation at Tamb = 25 °C; requires thermal-aware copper pour for sustained operation. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.65 mm pitch, 0.9 mm max height; optimized for high-density routing and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires 5–13 mA base drive for full 500 mA collector conduction per hFE bin. |
| 2 | Emitter (E) | Reference terminal for bias network; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | High-current output node; electrically isolated from PCB ground plane when used in low-side switch topology. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE bins | BC817-25W's 160–400 range enables precise base resistor selection without margin overkill in production designs. |
| Low VCE(sat) | 700 mV max ensures <1.2% voltage drop across transistor in 5 V logic-driven loads, preserving signal headroom. |
| SC-70 footprint | 0.65 mm pitch allows placement adjacent to QFNs and microcontrollers without trace crowding or solder bridging. |
| 150 °C Tj rating | Enables operation in sealed enclosures or near heat sources where ambient reaches 105 °C with proper derating. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA–350 mA indicator or backlight LEDs from 3.3 V or 5 V MCU outputs. IC Role / Device Role / Timing Role: Low-side current switch controlled by MCU GPIO; replaces discrete MOSFET where gate drive voltage is marginal. Use Value: 160–400 hFE ensures reliable turn-on with 5–10 mA base current, while 700 mV VCE(sat) limits LED forward voltage loss to <2% at 350 mA. |
Use Scenario: Amplifying weak sensor signals (e.g., thermistor divider outputs) into clean 0–3.3 V logic levels for ADC sampling. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with fixed bias; provides gain without op-amp cost or supply overhead. Use Value: 100 MHz fT supports bandwidth up to 10 MHz, sufficient for 10-bit ADC sampling at 1 MSPS with minimal phase lag. |
| Power Supply Enable Switch | Level Translation Interface |
|
Use Scenario: Enabling/disabling 3.3 V or 5 V LDO outputs using 1.8 V or 2.5 V control signals in multi-rail systems. IC Role / Device Role / Timing Role: High-side or low-side enable switch; interfaces between incompatible logic families. Use Value: 45 V VCEO provides 10× margin over 3.3/5 V rails, eliminating risk of transients causing latch-up or failure during hot-plug events. |
Use Scenario: Converting 1.8 V I²C clock/data signals to 3.3 V or 5 V bus levels in mixed-voltage SoC designs. IC Role / Device Role / Timing Role: Bidirectional level shifter using open-collector configuration with pull-up resistors. Use Value: 100–400 hFE ensures fast rise/fall times (<50 ns) at 400 kHz I²C speeds, meeting timing budgets without active ICs. |
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 |
|---|---|---|---|
| BC817-16W | hFE = 100–250; lower gain bin with tighter spread but reduced current drive margin at low IB. | Better suited for high-speed switching where gain consistency matters more than absolute current gain. | Select when base drive is limited to ≤5 mA and VCE(sat) must remain <650 mV at 300 mA. |
| BC817-40W | hFE = 250–600; higher gain bin requiring less base current but exhibiting greater unit-to-unit variation. | Preferred in low-power battery-operated devices where base current reduction extends runtime. | Choose when IB must stay below 3 mA at 500 mA IC, accepting wider hFE tolerance for efficiency gains. |
Compared with BC817-16W and BC817-40W, the BC817-25W offers balanced hFE stability and drive efficiency - delivering predictable 10–13 mA base requirements for 500 mA loads while maintaining tighter gain distribution than the -40W variant and higher minimum gain than the -16W version.
Availability
BC817-25W is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, power supply enable switches, and level translation interfaces requiring stable component supply across industrial, consumer, and computing product lifecycles.
Supply support for BC817-25W 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 headquartered in Nijmegen, Netherlands, specializing in high-volume production of essential semiconductors with focus on efficiency, reliability, and miniaturization.
The BC817W series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, space-constrained applications demanding consistent DC gain, low saturation voltage, and robust thermal performance in SOT323 packaging.
FAQ
What is the maximum continuous collector current for BC817-25W at 70 °C ambient?
At Tamb = 70 °C, the BC817-25W's maximum continuous collector current is derated to approximately 350 mA. This follows the 290 mW total power dissipation limit and 431 K/W thermal resistance with 1 cm² collector pad, yielding a junction temperature of 150 °C at that current level.
Does BC817-25W support automotive-grade operation?
No. The BC817-25W is explicitly non-automotive qualified per Nexperia's revision history (v.8, July 2022), which states the product changed to non-automotive qualification. Automotive applications require the -Q qualified variants such as BC817-25W-Q, which undergo AEC-Q101 stress testing and PPAP documentation.
How does the marking code "6B%" identify BC817-25W on the device body?
The marking "6B%" on the BC817-25W die surface identifies it unambiguously: "6B" is the standardized Nexperia code for the BC817-25W gain bin, while "%" is a placeholder for the manufacturing site code (e.g., "A" for Nijmegen, "C" for Bangkok). This matches Table 5 in the official datasheet.
Can BC817-25W replace BC847B in existing designs?
Not directly. While both are SOT323 NPN transistors, BC847B has VCEO = 45 V but hFE = 200–450 and VCE(sat) = 600 mV max - differing in gain distribution and saturation behavior. Layout compatibility exists, but circuit validation is required due to different base current requirements and thermal impedance profiles.
BC817-25W/MIX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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/MIX FAQ
1.How can I place an order for BC817-25W/MIX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25W/MIX 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/MIX reliable?
The price and inventory of BC817-25W/MIX 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/MIX is usually 5 days.
3.What payment methods are accepted for BC817-25W/MIX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25W/MIX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25W/MIX?
BC817-25W/MIX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25W/MIX 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/MIX?
For technical support, including BC817-25W/MIX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25W/MIX requirements.
6.How does Aetrix verify that BC817-25W/MIX is sourced from the original manufacturer or authorized distributors?
All BC817-25W/MIX 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/MIX meets industry standards.
7.What is the process for return or replacement of BC817-25W/MIX?
All BC817-25W/MIX units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25W/MIX, 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/MIX part is unused and in its original packaging.
Return procedure for BC817-25W/MIX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25W/MIX Tags
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