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onsemi BC81816MTF
- Part No.:
- BC81816MTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC81816MTF.pdf
- Description:
- TRANS NPN 25V 0.8A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,602
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Product details
Overview
BC81816MTF from ON Semiconductor is an NPN epitaxial silicon transistor in SOT-23 package, rated for 25 V VCEO, 800 mA IC, and 310 mW power dissipation, with hFE of 100–250 at 100 mA, used in low-power switching and AF-driver stages.
For engineers reviewing the BC81816MTF datasheet, pinout, applications, or equivalent options, key selection criteria include VCEO rating, hFE classification (16), DC current gain linearity at 100–300 mA, VCE(sat) ≤ 0.7 V at 500 mA/50 mA drive, and thermal resistance of 403 °C/W.
Technical Context
This discrete NPN transistor operates as a general-purpose amplifier or switch in linear and saturated modes. Its 25 V collector-emitter breakdown voltage and 30 V collector-base rating define safe operating limits for low-voltage DC circuits up to 24 V rail systems.
Designed for stable DC current gain across temperature (−25°C to 125°C), it delivers hFE ≥ 100 at IC = 100 mA and maintains VBE(on) ≤ 1.2 V at 300 mA, supporting predictable base drive design in compact SOT-23 layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 25 V - Maximum continuous collector-emitter voltage before breakdown; sets upper limit for supply rails in switching applications. |
| IC (DC) | 800 mA - Absolute max collector current; usable up to 500 mA with validated VCE(sat) performance. |
| hFE (100 mA) | 100–250 - Confirmed DC current gain range at VCE = 1 V; enables precise base resistor sizing for 10–25 mA drive. |
| VCE(sat) | ≤ 0.7 V @ IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss in switching loads. |
| fT | 100 MHz - Current-gain bandwidth product at VCE = 5 V, IC = 10 mA; supports audio-frequency amplification and fast switching. |
| RθJA | 403 °C/W - Junction-to-ambient thermal resistance on standard FR-4 PCB; determines max ambient temperature for 150 °C junction limit. |
Pinout & Package
SOT-23 3-lead plastic package (JEDEC TO-236AB), low-profile surface-mount format with 1.3 mm × 2.9 mm footprint and 1.1 mm height. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives forward-biased current to enable conduction; requires ~1.2 V VBE(on) at 300 mA IC. |
| 2 (Emitter) | Current return path | Common reference node for biasing; tied to ground or low-side load return in common-emitter configurations. |
| 3 (Collector) | Output current terminal | Delivers switched or amplified current to load; rated for 25 V max VCE and 800 mA DC. |
Key Features
| Feature | Design Value |
|---|---|
| hFE classification "16" | Guaranteed 100–250 DC current gain at 100 mA, enabling consistent gain matching in production batches. |
| Low VCE(sat) | ≤ 0.7 V at 500 mA/50 mA ensures < 350 mW conduction loss, critical for thermally constrained SOT-23 designs. |
| Complementary pairing | Direct complement to BC808 PNP transistor, simplifying push-pull and differential pair implementation. |
| AF-driver suitability | Validated performance at audio frequencies (fT = 100 MHz) and low distortion in 10–20 kHz signal paths. |
Applications
| Audio Pre-Amplifier Stage | Low-Side Load Switch |
|---|---|
Use Scenario: Amplifying microphone or line-level signals in portable audio devices before ADC sampling. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with fixed bias network. Use Value: hFE ≥ 100 and fT = 100 MHz ensure flat 20 Hz–20 kHz gain response with minimal phase shift. | Use Scenario: Driving LED arrays, relays, or solenoids from microcontroller GPIO pins in industrial control panels. IC Role / Device Role / Timing Role: Low-side saturated switch with base driven by 3.3 V or 5 V logic. Use Value: VCE(sat) ≤ 0.7 V at 500 mA reduces power loss and heat rise in space-constrained enclosures. |
| DC Motor Speed Control | Signal Level Translation |
Use Scenario: PWM-controlled 12 V brushed DC motor in battery-powered tools or robotics. IC Role / Device Role / Timing Role: High-current switching element in emitter-follower or common-emitter topology. Use Value: 800 mA IC rating and 25 V VCEO support 12 V motor back-EMF spikes without breakdown. | Use Scenario: Converting 1.8 V logic outputs to 3.3 V or 5 V compatible levels for interfacing mixed-voltage ICs. IC Role / Device Role / Timing Role: Active pull-up level shifter using open-collector output configuration. Use Value: Fast turn-on/off (enabled by fT = 100 MHz) and low VBE(on) ensure sub-100 ns propagation delay. |
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 |
|---|---|---|---|
| BC81716MTF | Higher VCEO (45 V vs. 25 V); same hFE range and SOT-23 package. | Preferred where 24 V+ supply rails or higher transient margin required. | Select BC81716MTF when system voltage exceeds 25 V but same gain and footprint are needed. |
| MMBT3904LT1G | Lower IC (200 mA vs. 800 mA); hFE 100–300; identical SOT-23 pinout. | Suitable only for signal-level switching, not power loads >200 mA. | Choose MMBT3904LT1G for low-current digital logic interface, not motor or LED driver roles. |
Compared with BC81816MTF, BC81716MTF offers higher voltage headroom at identical gain and package, while MMBT3904LT1G trades current capacity for tighter hFE tolerance in signal-only roles-neither is pin-compatible drop-in replacement without circuit review.
Availability
BC81816MTF is available at Aetrix Electronics and suitable for audio pre-amplifiers, low-side load switches, and DC motor speed control requiring stable component supply and consistent hFE binning.
Supply support for BC81816MTF 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 power management, analog, sensors, and discrete devices for automotive, industrial, and consumer markets.
The BC81816MTF belongs to the BC817/BC818 family of general-purpose NPN transistors designed for cost-sensitive, high-volume switching and amplification in space-constrained PCBs.
FAQ
What is the maximum collector-emitter voltage rating for BC81816MTF?
The BC81816MTF has a maximum collector-emitter voltage (VCEO) rating of 25 V. This value is specified under DC conditions at TA = 25°C and defines the absolute upper limit before breakdown occurs. Operating above this voltage risks permanent device failure, and derating is recommended for reliability in variable-temperature environments. The BC81816MTF datasheet confirms this rating in its Absolute Maximum Ratings table.
What does the "16" suffix in BC81816MTF indicate?
The "16" in BC81816MTF denotes the hFE (DC current gain) classification bin, specifying a guaranteed range of 100–250 at VCE = 1 V and IC = 100 mA. This binning enables predictable base drive design and batch consistency in production. The BC81816MTF marking "8GA" on the package corresponds directly to this hFE group per Fairchild/ON Semiconductor documentation.
Is BC81816MTF pin-compatible with BC81716MTF?
Yes, BC81816MTF and BC81716MTF share identical SOT-23 package dimensions, pin assignment (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), and land pattern requirements. However, they differ in VCEO (25 V vs. 45 V) and VCBO (30 V vs. 50 V), so direct substitution requires verification of voltage stress margins in the target circuit. The BC81816MTF cannot replace BC81716MTF in >25 V applications.
What is the thermal resistance of BC81816MTF, and how does it affect layout?
The BC81816MTF has a junction-to-ambient thermal resistance (RθJA) of 403 °C/W on a standard FR-4 PCB (76 mm × 114 mm, minimum land pattern). This means each watt of dissipated power raises the junction temperature by 403 °C above ambient. To maintain TJ ≤ 150 °C at 25°C ambient, power dissipation must stay below 310 mW-matching its rated PD. Layout must follow JEDEC-recommended SOT-23 copper pour guidelines to avoid thermal runaway.
Can BC81816MTF be used in audio amplifier circuits?
Yes, BC81816MTF is explicitly qualified for AF-driver stages and low-power output stages per its official datasheet. With fT = 100 MHz, hFE stability from −25°C to 125°C, and low VCE(sat), it supports clean amplification across 20 Hz–20 kHz. Its 100–250 hFE bin enables matched pairs in differential inputs, and the BC81816MTF's low noise characteristics make it suitable for pre-amplifier gain blocks in portable audio systems.
BC81816MTF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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):
- 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:
- 110 @ 100mA, 1V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC81816MTF FAQ
1.How can I place an order for BC81816MTF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC81816MTF 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 BC81816MTF reliable?
The price and inventory of BC81816MTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC81816MTF is usually 5 days.
3.What payment methods are accepted for BC81816MTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC81816MTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC81816MTF?
BC81816MTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC81816MTF 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 BC81816MTF?
For technical support, including BC81816MTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC81816MTF requirements.
6.How does Aetrix verify that BC81816MTF is sourced from the original manufacturer or authorized distributors?
All BC81816MTF 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 BC81816MTF meets industry standards.
7.What is the process for return or replacement of BC81816MTF?
All BC81816MTF units undergo pre-shipment inspection (PSI). If there is an issue with BC81816MTF, 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 BC81816MTF part is unused and in its original packaging.
Return procedure for BC81816MTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC81816MTF Tags
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