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onsemi BC33816BU
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- Part No.:
- BC33816BU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
BC33816BU.pdf
- Description:
- TRANS NPN 25V 0.8A TO-92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,059
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Product details
Overview
BC33816BU from ON Semiconductor is an NPN epitaxial silicon transistor in TO-92 package, rated for 30 V VCEO, 800 mA IC, and 625 mW PD; designed for low-power switching and amplification in AF driver stages and general-purpose analog circuits.
For engineers reviewing the BC33816BU datasheet, pinout, applications, or equivalent options, key selection criteria include its hFE range (100–250 at IC = 100 mA), VCE(sat) ≤ 0.7 V at 500 mA/50 mA drive, and TO-92 mechanical compatibility with legacy through-hole designs.
Technical Context
This device operates as a general-purpose bipolar junction transistor with fixed emitter-base and collector-emitter breakdown limits-VEBO = 5 V, VCEO = 25 V, VCES = 30 V-and supports DC current gain classification hFE1 (100–250) and hFE2 (≥60) under defined bias conditions.
Thermal performance is characterized by RθJA = 200 °C/W on standard FR-4 PCB, with derating of 5.0 mW/°C above 25 °C ambient, and maximum junction temperature of 150 °C-enabling reliable operation in consumer-grade non-derated environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 25 V - Maximum safe collector-emitter voltage before breakdown under open-base condition |
| IC (DC) | 800 mA - Continuous collector current handling capacity without thermal runaway |
| PD | 625 mW - Total power dissipation limit at 25 °C ambient, derates linearly above that temperature |
| hFE (IC = 100 mA) | 100–250 - Confirmed DC current gain range for small-signal amplification and switch saturation control |
| VCE(sat) | ≤0.7 V @ IC = 500 mA, IB = 50 mA - Low saturation voltage ensures minimal conduction loss in switching applications |
| fT | 100 MHz - Current-gain bandwidth product enabling use up to low-VHF signal amplification |
| Cob | 12 pF @ VCB = 10 V - Output capacitance affecting high-frequency response and switching speed |
Pinout & Package
BC33816BU is housed in a JEDEC-compliant TO-92 3-lead plastic package with straight leads (bulk packing). Pin configuration is standardized: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Collector | Main current output terminal; connects to load or supply rail in common-emitter configurations |
| 2 | Base | Control input; requires ~1.2 V forward bias and sufficient drive current to saturate or cut off the transistor |
| 3 | Emitter | Current return path; typically grounded or connected to reference node in amplifier/switch topologies |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pair availability | Matches BC328 PNP for push-pull and differential amplifier designs |
| AF-driver stage suitability | Validated hFE and fT support audio-frequency amplification up to ~10 kHz with low distortion |
| Low VCE(sat) at high IC | Ensures <1% voltage drop across transistor when used as a saturated switch driving 500 mA loads |
| TO-92 mechanical standardization | Enables direct replacement in legacy through-hole PCBs without footprint redesign |
| JEDEC TO-92 compliance | Guarantees dimensional consistency across manufacturers for automated insertion and rework |
Applications
| Audio Amplifier Stages | LED Driver Circuits |
|---|---|
Use Scenario: Low-voltage, low-current audio preamplifier or driver stage in portable radios and intercom systems. IC Role / Device Role / Timing Role: NPN transistor configured in common-emitter mode to provide voltage and current gain. Use Value: hFE range of 100–250 and fT = 100 MHz ensure stable mid-band amplification with minimal phase shift. | Use Scenario: Constant-current LED switching in indicator panels and status displays. IC Role / Device Role / Timing Role: Switching transistor operating in saturation/cutoff to enable or disable LED current paths. Use Value: VCE(sat) ≤ 0.7 V minimizes power loss and heat generation during LED-on state. |
| Relay Driver Interfaces | Signal Level Shifting |
Use Scenario: Driving electromagnetic relay coils requiring 20–500 mA from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Interface transistor providing current gain between logic-level control and inductive load. Use Value: 800 mA IC rating and robust VCES = 30 V withstand back-EMF spikes during coil deactivation. | Use Scenario: Translating 3.3 V logic signals to 5 V or 12 V domains in mixed-supply digital systems. IC Role / Device Role / Timing Role: Active pull-up/pull-down switch enabling bidirectional level translation. Use Value: Fast turn-on/off characteristics (driven by fT and low Cob) support clean edge transitions up to 1 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC33825TA | Higher hFE range (160–400), same VCEO/IC/package | Better suited for low-drive amplifier stages where base current must be minimized | Select BC33825TA when higher current gain is required without changing layout or thermal design |
| BC33716BU | Higher VCEO (45 V), identical hFE range and TO-92 package | Preferred in 30–45 V supply rails where BC33816BU's 25 V rating is insufficient | Choose BC33716BU for applications needing greater collector-emitter standoff voltage while retaining same gain and footprint |
Compared with BC33825TA and BC33716BU, BC33816BU offers balanced gain and voltage rating for cost-sensitive 24 V and lower systems-making it optimal where moderate hFE and proven reliability in legacy designs outweigh need for extended voltage or gain margins.
Availability
BC33816BU is available at Aetrix Electronics and suitable for audio amplifier stages, LED driver circuits, relay driver interfaces, and signal level shifting requiring stable component supply and long-term industrial availability.
Supply support for BC33816BU 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power and signal management solutions, with roots in Fairchild Semiconductor's discrete portfolio.
The BC33816BU belongs to ON Semiconductor's legacy general-purpose bipolar transistor family, engineered for cost-effective, robust switching and amplification in consumer, industrial, and automotive-qualified (non-safety-critical) applications.
FAQ
What is the maximum collector-emitter voltage rating for BC33816BU?
The BC33816BU has a maximum collector-emitter voltage rating of 25 V (VCEO) under open-base conditions. This value is confirmed in the absolute maximum ratings table and applies at TA = 25 °C. Exceeding this voltage risks irreversible breakdown. The BC33816BU also supports 30 V VCES (collector-emitter with base shorted to emitter), which is relevant for switching applications with base drive present.
Does BC33816BU have a specified DC current gain range?
Yes, BC33816BU is classified as "16" grade with a DC current gain (hFE) range of 100–250 when measured at VCE = 1 V and IC = 100 mA. This classification is explicitly defined in the hFE Classification table and distinguishes BC33816BU from higher-gain variants like BC33825TA (160–400) and BC33840BU (250–630).
What package type does BC33816BU use, and is it lead-free?
BC33816BU uses a JEDEC-standard TO-92 3-lead plastic package with straight leads and bulk packing. Per ON Semiconductor's product change notices and packaging documentation, this variant is RoHS-compliant and lead-free, consistent with industry-wide transition requirements effective post-Fairchild integration.
Can BC33816BU replace BC33716BU in existing designs?
BC33816BU is not a direct replacement for BC33716BU due to its lower VCEO (25 V vs. 45 V) and VCES (30 V vs. 50 V). While both share identical hFE classification and TO-92 package, substituting BC33816BU into a BC33716BU design risks overvoltage failure if the circuit operates near or above 25 V collector-emitter potential. Always verify voltage stress margins before substitution.
What is the thermal resistance of BC33816BU, and how does it affect PCB layout?
The BC33816BU has a junction-to-ambient thermal resistance (RθJA) of 200 °C/W on a standard FR-4 PCB (76 mm × 114 mm, 1.57 mm thick, minimum land pattern). This means each watt of dissipated power raises junction temperature by 200 °C above ambient. To stay within the 150 °C max junction limit, keep power below 625 mW at 25 °C ambient-or reduce allowable power linearly using the 5.0 mW/°C derating factor.
BC33816BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 800 mA
- Voltage - Collector Emitter Breakdown (Max):
- 25 V
- Vce Saturation (Max) @ Ib, Ic:
- 700mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 100mA, 1V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
BC33816BU FAQ
1.How can I place an order for BC33816BU through Aetrix?
Please submit a Request for Quotation (RFQ) for BC33816BU 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 BC33816BU reliable?
The price and inventory of BC33816BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC33816BU is usually 5 days.
3.What payment methods are accepted for BC33816BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC33816BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC33816BU?
BC33816BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC33816BU 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 BC33816BU?
For technical support, including BC33816BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC33816BU requirements.
6.How does Aetrix verify that BC33816BU is sourced from the original manufacturer or authorized distributors?
All BC33816BU 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 BC33816BU meets industry standards.
7.What is the process for return or replacement of BC33816BU?
All BC33816BU units undergo pre-shipment inspection (PSI). If there is an issue with BC33816BU, 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 BC33816BU part is unused and in its original packaging.
Return procedure for BC33816BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC33816BU Tags
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