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Nexperia USA Inc. BC817-25/SNVL
- Part No.:
- BC817-25/SNVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC817-25/SNVL.pdf
- Description:
- TRANS NPN 45V 0.5A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,462
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Product details
Overview
BC817-25/SNVL from Nexperia is a 45 V, 500 mA NPN general-purpose transistor in SOT23 (TO-236AB) package, optimized for switching and linear amplification with hFE of 160–400 at IC = 100 mA, VCE = 1 V, and Tamb = 25 °C. It delivers low VCE(sat) ≤ 700 mV at IC = 500 mA / IB = 50 mA and supports peak pulse current up to 1 A - used in power supply control, LED drivers, and microcontroller interface circuits.
For engineers reviewing the BC817-25/SNVL datasheet, BC817-25/SNVL pinout, BC817-25/SNVL application, or BC817-25/SNVL equivalent, key selection criteria include DC current gain range, saturation voltage under load, thermal resistance on FR4 PCB, and compatibility with standard SOT23 reflow footprints.
Technical Context
This NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: VCEO = 45 V, IC = 500 mA continuous, and Ptot = 345 mW on 1 cm² collector pad. Its pulsed operation supports ICM = 1 A (tp ≤ 1 ms), enabling short-duration load switching without thermal runaway.
The device exhibits hFE = 160–400 at VCE = 1 V, IC = 100 mA, and shows predictable VBE ≈ 1.2 V and VCE(sat) ≤ 700 mV under specified drive conditions - critical for base-driven logic-level interfacing and low-loss switching in 3.3 V/5 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; sets upper rail limit for 24 V and 36 V supply switching stages. |
| IC | 500 mA continuous - Sustained current handling capability; sufficient for driving relays, small solenoids, or LED strings. |
| hFE | 160–400 at VCE = 1 V, IC = 100 mA - Tighter gain band than BC817-16 (100–250), enabling more predictable base resistor sizing in amplifier designs. |
| VCE(sat) | ≤ 700 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage reduces conduction loss and self-heating in high-duty-cycle switching. |
| Rth(j-a) | 362 K/W on FR4 with 1 cm² collector pad - Thermal resistance defines junction temperature rise under load; enables derating to 150 °C max Tj. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for audio-frequency amplification and PWM signal buffering up to ~10 MHz. |
| Cc | 3 pF - Collector capacitance limits high-frequency gain roll-off and affects switching speed in fast digital interfaces. |
Pinout & Package
SOT23 (TO-236AB) surface-mount plastic package with 3 leads; 1.9 mm × 1.1 mm footprint, 0.45 mm profile, and tin-plated terminations compatible with standard reflow profiles (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure saturation at target IC. |
| 2 | Emitter (E) | Common reference terminal; tied to ground or low-side return path in low-side switch configurations. |
| 3 | Collector (C) | High-current output node; connects to load (e.g., relay coil, LED anode); thermally coupled to PCB pad for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE selections | BC817-25 provides mid-range gain (160–400), balancing noise immunity and drive sensitivity vs. BC817-16 (low gain) and BC817-40 (high gain). |
| Low VCE(sat) | ≤ 700 mV ensures <1.25 mW conduction loss at 500 mA, reducing thermal stress in compact PCB layouts. |
| Standard SOT23 footprint | Compatible with industry-standard reflow soldering (Fig. 17) and wave soldering (Fig. 18), minimizing assembly process changes. |
| Pulsed ICM = 1 A | Supports transient loads like motor startup surges or capacitor charging without requiring oversized devices. |
Applications
| Power Supply Enable Switch | Microcontroller GPIO Driver |
|---|---|
|
Use Scenario: Enabling/disabling a 12 V DC-DC converter output stage using a 3.3 V MCU GPIO. IC Role / Device Role / Timing Role: Low-side switch controlling converter EN pin or primary-side gate driver enable path. Use Value: VCE(sat) ≤ 700 mV ensures minimal voltage drop across transistor, preserving enable threshold margin and reducing self-heating during continuous operation. |
Use Scenario: Driving a 20 mA indicator LED from an STM32 PA0 output pin. IC Role / Device Role / Timing Role: Current-amplifying interface between MCU I/O and LED cathode (common-anode configuration). Use Value: hFE ≥ 160 allows 125 Ω base resistor at 3.3 V, ensuring full saturation while limiting GPIO current to <26 µA leakage + 26 mA drive. |
| Relay Coil Driver | Signal-Level Amplifier Stage |
|
Use Scenario: Controlling a 5 V, 70 Ω relay coil (Icoil ≈ 71 mA) in industrial I/O modules. IC Role / Device Role / Timing Role: Saturated switch providing galvanic isolation between logic and inductive load. Use Value: IC = 500 mA rating accommodates relay inrush (2–3× steady-state) and flyback energy absorption via external diode. |
Use Scenario: Pre-amplifying sensor signals (e.g., thermistor bridge output) before ADC input in data loggers. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network and emitter degeneration resistor. Use Value: fT = 100 MHz and hFE stability over −55 °C to 150 °C support accurate DC-coupled gain in wide-temperature environments. |
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 |
|---|---|---|---|
| BC817-25,115 (Nexperia) | Same electrical specs; differs only in packaging (tape-and-reel vs. bulk) and marking code (6B% vs. SNVL). | No functional difference; SNVL denotes specific reel packaging variant per Nexperia ordering matrix. | Select SNVL for automated SMT placement with verified reel orientation and moisture sensitivity level (MSL) compliance. |
| MMBT3904LT1G (onsemi) | Lower VCEO = 40 V, hFE = 100–300, VCE(sat) = 300 mV @ IC/IB = 10 mA/1 mA - optimized for low-current logic switching, not 500 mA loads. | Not suitable for continuous 500 mA operation; limited to ≤200 mA sustained use due to lower Ptot (225 mW). | Choose only for low-power signal buffering where gain consistency at <10 mA matters more than high-current saturation performance. |
Compared with BC817-25/SNVL, the 115 variant offers identical electrical behavior but different logistics packaging, while MMBT3904LT1G trades off current capability and voltage margin for tighter low-current hFE tolerance - making SNVL preferable for robust 500 mA switching and MMBT3904LT1G better suited for sub-50 mA digital interface tasks.
Availability
BC817-25/SNVL is available at Aetrix Electronics and suitable for power supply enable switches, microcontroller GPIO drivers, relay coil drivers, and signal-level amplifier stages requiring stable component supply across industrial, consumer, and embedded design cycles.
Supply support for BC817-25/SNVL 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 discrete, logic, and MOSFET solutions, with manufacturing rooted in process optimization and automotive-grade quality systems.
The BC817 series belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for cost-sensitive, high-yield applications demanding consistent gain bins, robust SOT23 thermal performance, and broad industrial temperature operation.
FAQ
What is the maximum continuous collector current for BC817-25/SNVL?
The maximum continuous collector current is 500 mA at ambient temperature ≤25 °C with adequate PCB copper area (1 cm² collector pad). Derating applies above 25 °C per Fig. 1: at 75 °C ambient, maximum IC drops to approximately 345 mA to maintain Tj ≤ 150 °C.
Does BC817-25/SNVL support automotive applications?
No. Per Nexperia's Rev. 8 datasheet (July 2022), BC817-25/SNVL is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and is not warranted for safety-critical or life-support systems. Automotive alternatives require explicit -Q suffix parts (e.g., BC817-25-Q).
How does the hFE range of BC817-25 compare to BC817-40?
BC817-25 specifies hFE = 160–400 at VCE = 1 V, IC = 100 mA, while BC817-40 specifies 250–600 under identical conditions. The -25 variant offers tighter mid-range gain, improving predictability in bias networks where excessive hFE causes thermal runaway risk in linear amplifiers.
What is the recommended reflow soldering footprint for BC817-25/SNVL?
The official Nexperia reflow footprint (Fig. 17) uses 0.6 mm × 0.6 mm solder lands (3×), 0.7 mm solder paste stencil apertures (3×), and 2.9 mm × 1.9 mm overall pad layout. This ensures reliable wetting, coplanarity, and thermal relief during lead-free reflow (peak 260 °C, 10 s dwell).
BC817-25/SNVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BC817-25/SNVL FAQ
1.How can I place an order for BC817-25/SNVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BC817-25/SNVL 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 BC817-25/SNVL reliable?
The price and inventory of BC817-25/SNVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC817-25/SNVL is usually 5 days.
3.What payment methods are accepted for BC817-25/SNVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC817-25/SNVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC817-25/SNVL?
BC817-25/SNVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC817-25/SNVL 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 BC817-25/SNVL?
For technical support, including BC817-25/SNVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC817-25/SNVL requirements.
6.How does Aetrix verify that BC817-25/SNVL is sourced from the original manufacturer or authorized distributors?
All BC817-25/SNVL 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 BC817-25/SNVL meets industry standards.
7.What is the process for return or replacement of BC817-25/SNVL?
All BC817-25/SNVL units undergo pre-shipment inspection (PSI). If there is an issue with BC817-25/SNVL, 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 BC817-25/SNVL part is unused and in its original packaging.
Return procedure for BC817-25/SNVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC817-25/SNVL 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
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