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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi 2SC2812N6-CPA-TB-E

Name: 2SC2812N6-CPA-TB-E
Brand: onsemi
SKU: 2SC2812N6-CPA-TB-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SC2812N6-CPA-TB-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: 2SC2812N6-CPA-TB-E.pdf

Description:: TRANS NPN 50V 0.15A 3-CP

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Product details

Overview

2SC2812N6-CPA-TB-E from onsemi is an NPN bipolar junction transistor in a CPA (SOT-23) package, rated for 50 V V_CEO, 150 mA I_C, and low 0.1–0.5 V V_CE(sat) at I_C = 50 mA / I_B = 5 mA. It delivers 100 MHz f_T, h_FE = 200–400 at V_CE = 6 V / I_C = 1 mA, and is used in compact DC-DC converter switching stages and low-power signal amplification.

For engineers reviewing the 2SC2812N6-CPA-TB-E datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CE(sat) performance at 50 mA, h_FE binning (Rank 6), SOT-23 thermal derating on FR-4, and Pb-free tape-and-reel (TB) compliance per JESD-97.

Technical Context

This NPN transistor operates as a general-purpose amplifying and switching device with fixed-emitter bias configuration. Its design supports linear amplification up to 100 MHz and saturated switching with guaranteed V_CE(sat) ≤ 0.5 V under 50 mA collector load and 5 mA base drive.

The device shares a complementary PNP pair (2SA1179N6) and identical CPA package footprint. Electrical characteristics are specified at T_a = 25°C with validated derating curves for P_C vs. T_a and h_FE vs. I_C across –25°C to +75°C ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	150 mA - Continuous DC collector current rating; usable up to 300 mA in pulsed operation
V_CE(sat)	0.1–0.5 V @ I_C=50 mA/I_B=5 mA - Confirmed low saturation voltage enabling <100 mW switching loss
f_T	100 MHz - Gain-bandwidth product defining upper frequency limit for small-signal amplification
h_FE	200–400 @ V_CE=6 V/I_C=1 mA - Rank 6 DC current gain bin ensuring predictable base drive requirements
C_ob	3.0 pF @ V_CB=6 V/f=1 MHz - Output capacitance affecting high-frequency switching transitions and stability
P_C	200 mW @ T_a=25°C - Thermal power dissipation limit; derates to ~100 mW at 75°C on standard PCB

Pinout & Package

2SC2812N6-CPA-TB-E uses the CPA package - a JEITA/JEDEC-standardized variant of SC-59 (equivalent to TO-236AB and SOT-23), with 3 mm × 1.9 mm footprint, 0.95 mm height, and 0.2 mm minimum lead thickness.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires ≥5 mA drive for full saturation at 50 mA collector load
2	Emitter	Current return path; connected to ground or low-impedance reference in common-emitter topology
3	Collector	Output terminal; handles switched load current up to 150 mA continuous with 50 V standoff

Key Features

Feature	Design Value
Low V_CE(sat)	0.1–0.5 V enables <100 mW conduction loss at 50 mA, reducing thermal stress in space-constrained layouts
High V_CEO	50 V rating supports use in 24 V industrial control rails and 36 V automotive auxiliary circuits
Miniature CPA package	SOT-23-compatible footprint allows drop-in replacement in legacy designs while supporting 0.65 mm pitch routing
Rank 6 h_FE binning	Guaranteed 200–400 DC gain ensures consistent base resistor sizing across production lots
Pb-free TB taping	3,000 pcs./reel embossed tape meets RoHS and J-STD-020 moisture sensitivity level 1 (MSL-1)

Applications

LED Driver Stage	DC-DC Converter Switch
Use Scenario: Driving discrete high-brightness LEDs in portable instrumentation backlighting. IC Role / Device Role / Timing Role: NPN switch controlling LED current path between supply and ground. Use Value: Low 0.1–0.5 V V_CE(sat) minimizes forward voltage drop, preserving >95% of supply headroom for LED string regulation.	Use Scenario: Low-side switching element in 5–12 V input buck converter feedback or gate drive stage. IC Role / Device Role / Timing Role: Fast-switching NPN transistor toggling power FET gate or error amplifier output. Use Value: 100 MHz f_T and 3.0 pF C_ob support clean 500 kHz–1 MHz switching edges without excessive ringing or delay.
Signal Amplifier	Load Switch Interface
Use Scenario: Small-signal preamplification of sensor outputs (e.g., thermistor, photodiode) in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network delivering 20–30 dB voltage gain. Use Value: Stable h_FE = 200–400 bin ensures predictable gain across temperature and unit-to-unit variation.	Use Scenario: Enabling/disabling 5 V peripheral rails (e.g., USB interface, sensor array) via microcontroller GPIO. IC Role / Device Role / Timing Role: Low-loss series pass switch placed between V_IN and load, controlled by MCU output. Use Value: 150 mA I_C rating and 200 mW P_C allow direct control of typical 100 mA loads without external heat sinking.

LED Driver Stage

DC-DC Converter Switch

Use Scenario: Driving discrete high-brightness LEDs in portable instrumentation backlighting.

IC Role / Device Role / Timing Role: NPN switch controlling LED current path between supply and ground.

Use Value: Low 0.1–0.5 V V_CE(sat) minimizes forward voltage drop, preserving >95% of supply headroom for LED string regulation.

Use Scenario: Low-side switching element in 5–12 V input buck converter feedback or gate drive stage.

IC Role / Device Role / Timing Role: Fast-switching NPN transistor toggling power FET gate or error amplifier output.

Use Value: 100 MHz f_T and 3.0 pF C_ob support clean 500 kHz–1 MHz switching edges without excessive ringing or delay.

Signal Amplifier

Load Switch Interface

Use Scenario: Small-signal preamplification of sensor outputs (e.g., thermistor, photodiode) in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias network delivering 20–30 dB voltage gain.

Use Value: Stable h_FE = 200–400 bin ensures predictable gain across temperature and unit-to-unit variation.

Use Scenario: Enabling/disabling 5 V peripheral rails (e.g., USB interface, sensor array) via microcontroller GPIO.

IC Role / Device Role / Timing Role: Low-loss series pass switch placed between V_IN and load, controlled by MCU output.

Use Value: 150 mA I_C rating and 200 mW P_C allow direct control of typical 100 mA loads without external heat sinking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT2222ALT1G	V_CEO = 40 V (vs. 50 V); h_FE = 100–300 (vs. 200–400); V_CE(sat) = 0.3–1.0 V @ same bias	Limited to ≤36 V systems; higher V_CE(sat) increases conduction loss in high-duty-cycle switching	Select when cost sensitivity outweighs 10 V V_CEO margin and tighter h_FE control
BC846B,215	V_CEO = 65 V (vs. 50 V); h_FE = 200–450 (similar range); f_T = 100 MHz (identical); C_ob = 4.5 pF (vs. 3.0 pF)	Better voltage margin but higher output capacitance may degrade edge speed in >500 kHz switching	Select when system overvoltage protection requires >60 V standoff and layout allows minor C_ob-induced delay

Compared with MMBT2222ALT1G and BC846B,215, the 2SC2812N6-CPA-TB-E offers optimal balance of 50 V V_CEO, low 0.1–0.5 V V_CE(sat), and 3.0 pF C_ob-making it preferred for compact 24 V switching and precision gain-critical amplification where thermal and timing margins are constrained.

Availability

2SC2812N6-CPA-TB-E is available at Aetrix Electronics and suitable for LED driver stages, DC-DC converter switches, signal amplifiers, and load switch interfaces requiring stable component supply and RoHS-compliant tape-and-reel delivery.

Supply support for 2SC2812N6-CPA-TB-E 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, serving automotive, industrial, cloud, and IoT markets with discrete, analog, and logic solutions.

The 2SC2812N6-CPA-TB-E belongs to onsemi's general-purpose bipolar transistor family, engineered for miniaturized, cost-sensitive switching and amplification in space-constrained consumer and industrial end equipment.

FAQ

What is the maximum continuous collector current rating for the 2SC2812N6-CPA-TB-E?

The 2SC2812N6-CPA-TB-E has a maximum continuous collector current (I_C) rating of 150 mA at T_a = 25°C. This rating decreases with rising ambient temperature, dropping to approximately 100 mA at 75°C when mounted on a standard glass-epoxy PCB (20 × 30 × 1.6 mm). Pulse current capability reaches 300 mA for durations ≤100 μs, as confirmed in the official onsemi datasheet No. 7198.

Does the 2SC2812N6-CPA-TB-E have a guaranteed h_FE range, and how is it binned?

Yes, the 2SC2812N6-CPA-TB-E is binned to Rank 6, guaranteeing a DC current gain (h_FE) of 200–400 when measured at V_CE = 6 V and I_C = 1 mA. This binning is explicitly defined in the "Ordering Information" section of the onsemi datasheet and applies to all units marked "2SC2812N6-CPA-TB-E", ensuring consistent base drive design across production lots.

What does the "CPA" package designation mean for the 2SC2812N6-CPA-TB-E?

The "CPA" designation identifies the physical package of the 2SC2812N6-CPA-TB-E as a miniature surface-mount outline standardized by JEITA and JEDEC. It is functionally equivalent to SC-59, TO-236AB, and SOT-23, measuring 2.93 mm × 1.9 mm × 0.95 mm with a 0.65 mm lead pitch. The CPA marking appears on the device top and corresponds to the land pattern shown in Figure 7 of datasheet No. 7198.

Is the 2SC2812N6-CPA-TB-E RoHS compliant and what does "TB" indicate in the part number?

Yes, the 2SC2812N6-CPA-TB-E is RoHS compliant and Pb-free. The "TB" suffix denotes embossed tape-and-reel packaging per JESD-97, with a minimum packing quantity of 3,000 pieces per reel. This format supports automated SMT placement and satisfies IPC/JEDEC moisture sensitivity level 1 (MSL-1) requirements without dry-packaging.

What is the typical output capacitance (C_ob) of the 2SC2812N6-CPA-TB-E and how does it affect switching performance?

The 2SC2812N6-CPA-TB-E has a typical output capacitance (C_ob) of 3.0 pF at V_CB = 6 V and f = 1 MHz. This low value reduces Miller effect during turn-off, enabling clean, fast switching transitions in applications such as DC-DC converter gate drives and LED PWM dimming-particularly critical above 500 kHz where higher C_ob would increase rise/fall time and switching losses.

2SC2812N6-CPA-TB-E 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):: 150 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 1mA, 6V

Power - Max:: 200 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 3-CP

2SC2812N6-CPA-TB-E FAQ

1.How can I place an order for 2SC2812N6-CPA-TB-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC2812N6-CPA-TB-E 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 2SC2812N6-CPA-TB-E reliable?

The price and inventory of 2SC2812N6-CPA-TB-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC2812N6-CPA-TB-E is usually 5 days.

3.What payment methods are accepted for 2SC2812N6-CPA-TB-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC2812N6-CPA-TB-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC2812N6-CPA-TB-E?

2SC2812N6-CPA-TB-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC2812N6-CPA-TB-E 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 2SC2812N6-CPA-TB-E?

For technical support, including 2SC2812N6-CPA-TB-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC2812N6-CPA-TB-E requirements.

6.How does Aetrix verify that 2SC2812N6-CPA-TB-E is sourced from the original manufacturer or authorized distributors?

All 2SC2812N6-CPA-TB-E 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 2SC2812N6-CPA-TB-E meets industry standards.

7.What is the process for return or replacement of 2SC2812N6-CPA-TB-E?

All 2SC2812N6-CPA-TB-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SC2812N6-CPA-TB-E, 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 2SC2812N6-CPA-TB-E part is unused and in its original packaging.

Return procedure for 2SC2812N6-CPA-TB-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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