AC847BQ-AC847CQ-AC848BQ NPN Small-Signal Transistor
DIODES INCORPORATED
Description
The bipolar junction transistors (BJT) are designed to meet the stringent requirements of automotive applications.
Features
- Ideally suited for automatic insertion
- Complementary PNP Types: AC857BQ-AC857CQ
- For switching and AF amplifier applications
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. "Green" Device (Note 3)
- The AC847BQ, AC847CQ and AC848BQ are suitable for automotive applications requiring specific change control; these parts are AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949 certified facilities.
- For more information on product definitions, visit: https://www.diodes.com/quality/product-definitions/
Mechanical Data
- Package: SOT23
- Package Material: Molded Plastic, "Green" Molding Compound
- UL Flammability Classification Rating 94V-0
- Moisture Sensitivity: Level 1 per J-STD-020
- Terminals: Finish-Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208
- Weight: 0.008 grams (Approximate)
Device Representation
SOT23 Package Top View: A three-lead surface-mount package.
Device Symbol: Standard BJT symbol with terminals labeled B (Base), C (Collector), and E (Emitter).
SOT23 Pinout Top View: Shows the pin configuration for the SOT23 package, typically with pins labeled 1, 2, 3 corresponding to E, B, C.
Ordering Information
(Note 4)
| Orderable Part Number | Package | Marking | Reel Size (inches) | Tape Width (mm) | Qty. | Carrier |
|---|---|---|---|---|---|---|
| AC847BQ-7 | SOT23 | 2D1 | 7 | 8 | 3000 | Reel |
| AC847CQ-7 | SOT23 | 2C9 | 7 | 8 | 3000 | Reel |
| AC848BQ-7 | SOT23 | 2K9 | 7 | 8 | 3000 | Reel |
| AC848BQ-13 | SOT23 | 2K9 | 13 | 8 | 10000 | Reel |
Notes
- 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
- 2. See Diodes Incorporated's definitions of Halogen- and Antimony-free, "Green" and Lead-free.
- 3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
- 4. For packaging details, visit our website.
Marking Information
SOT23 Package Marking:
XXX = Product Type Marking Code
YM = Date Code Marking
Y or Y = Year (e.g., M = 2025)
M or M = Month (e.g., 9 = September)
Date Code Key
Year
| Year | 2017 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | 2031 | 2032 | 2033 | 2034 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Code | E | M | N | P | R | S | T | U | V | W | X |
Month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Code | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | O | N | D |
Absolute Maximum Ratings
(@TA = +25°C, unless otherwise specified.)
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Collector-Base Voltage | VCBO | AC847BQ/CQ: 50; AC848BQ: 30 | V |
| Collector-Emitter Voltage | VCEO | AC847BQ/CQ: 45; AC848BQ: 30 | V |
| Emitter-Base Voltage | VEBO | AC847BQ/CQ: 6.0; AC848BQ: 5.0 | V |
| Continuous Collector Current | IC | 100 | mA |
| Peak Collector Current | ICM | 200 | mA |
| Peak Emitter Current | IEM | 200 | mA |
Thermal Characteristics
(@TA = +25°C, unless otherwise specified.)
| Characteristic | Symbol | Value | Unit |
|---|---|---|---|
| Power Dissipation | PD | Note 5: 310; Note 6: 350 | mW |
| Thermal Resistance, Junction to Ambient | ROJA | Note 5: 403; Note 6: 357 | °C/W |
| Thermal Resistance, Junction to Leads | RJL | Note 7: 350 | °C/W |
| Operating and Storage Temperature Range | TJ, TSTG | -65 to +150 | °C |
Notes
- 5. For a device mounted on minimum recommended pad layout 1oz copper that is on a single-sided FR-4 PCB; device is measured under still air conditions whilst operating in a steady state.
- 6. Same as Note 5 except the device is mounted on 15mm x 15mm 1oz copper.
- 7. Thermal resistance from junction to solder-point (at the end of the leads).
ESD Ratings
(Note 8)
| Characteristic | Symbol | Value | Unit | JEDEC Class |
|---|---|---|---|---|
| Electrostatic Discharge-Human Body Model | ESD HBM | 4000 | V | 3A |
| Electrostatic Discharge-Machine Model | ESD MM | 400 | V | C |
Note
- 8. Refer to JEDEC specifications JESD22-A114 and JESD22-A115.
Electrical Characteristics
(@TA = +25°C, unless otherwise specified.)
| Characteristic | Symbol | Min | Typ | Max | Unit | Test Condition |
|---|---|---|---|---|---|---|
| Collector-Base Breakdown Voltage | BVCBO | AC847BQ/CQ: 50; AC848BQ: 30 | -- | -- | V | IC = 10μA |
| Collector-Emitter Breakdown Voltage (Note 9) | BVCEO | AC847BQ/CQ: 45; AC848BQ: 30 | -- | -- | V | IC = 10mA |
| Emitter-Base Breakdown Voltage | BVEBO | AC847BQ/CQ: 6; AC848BQ: 5 | -- | -- | V | IE = 1μA |
| Collector Cutoff Current | ICBO | -- | -- | 15 | nA | VCB = 30V |
| Collector Emitter Cutoff Current | ICES | -- | -- | 15 | μA | VCB = 30V, TJ = +150°C |
| Emitter Base Cutoff Current | IEBO | -- | -- | 100 | nA | VCE = 50V |
| Small-Signal Current Gain (Note 9) | hfe | AC847BQ/AC848BQ: 330; AC847CQ: 600 | -- | -- | -- | VEB = 5V |
| Input Impedance (Note 9) | hie | AC847BQ/AC848BQ: 4.5; AC847CQ: 8.7 | -- | -- | kΩ | IC = 2.0mA, VCE = 5V, f = 1.0kHz |
| Output Admittance (Note 9) | hoe | AC847BQ/AC848BQ: 30; AC847CQ: 60 | -- | -- | μS | -- |
| Reverse Voltage Transfer Ratio (Note 9) | hre | AC847BQ/AC848BQ: 2x10⁻⁴; AC847CQ: 3x10⁻⁴ | -- | -- | -- | -- |
| DC Current Gain (Note 9) | hFE | AC847BQ/AC848BQ: 200-450; AC847CQ: 420-800 | 290; 520 | 450; 800 | -- | IC = 2.0mA, VCE = 5V |
| Collector-Emitter Saturation Voltage (Note 9) | VCE(sat) | -- | 90; 200; 580 | 250; 600; 700 | mV | IC = 10mA, IB = 0.5mA; IC = 100mA, IB = 5.0mA; IC = 2mA, VCE = 5V |
| Base-Emitter Turn-On Voltage (Note 9) | VBE(on) | -- | 660; 770 | 700 | mV | IC = 10mA, VCE = 5V |
| Base-Emitter Saturation Voltage (Note 9) | VBE(sat) | -- | 900 | -- | mV | IC = 10mA, IB = 0.5mA |
| Output Capacitance | Cobo | -- | 3 | -- | pF | IC = 100mA, IB = 5mA |
| Transition Frequency | fT | 100 | -- | 300 | MHz | VCB = 10V, f = 1MHz |
| Noise Figure | NF | -- | 2 | 10 | dB | VCE = 5V, IC = 10mA, f = 100MHz; VCE = 5V, IC = 200μA, Rs = 2kΩ, f = 1kHz, Af = 200Hz |
Note
- 9. Measured under pulsed conditions. Pulse width <= 300μs. Duty cycle <= 2%.
Thermal Characteristics and Derating Information
Fig.1 Derating Curve
This graph shows Maximum Power Dissipation (W) on the y-axis versus Temperature (°C) on the x-axis. It illustrates how the maximum power dissipation capability of the transistor decreases as the ambient temperature increases. The curve starts at approximately 0.35W at 25°C and drops linearly to 0W at 150°C.
Fig.2 Transient Thermal Impedance
This graph displays Thermal Resistance (°C/W) on the y-axis versus Pulse Width (s) on the x-axis. It shows transient thermal impedance for various duty cycles (D=0.05, D=0.1, D=0.2, D=0.5) and a single pulse condition. Higher duty cycles and shorter pulse widths result in lower thermal impedance.
Fig.3 Pulse Power Dissipation
This graph plots Maximum Power Dissipation (W) on the y-axis against Pulse Width (s) on the x-axis for a single pulse condition at an ambient temperature of 25°C. It shows that for very short pulse widths (e.g., 10ms), the power dissipation can be around 0.1W, increasing as pulse width increases.
Package Outline Dimensions
Please see http://www.diodes.com/package-outlines.html for the latest version.
SOT23 Package Dimensions
The SOT23 package is a small, surface-mount plastic package. The dimensions are provided in millimeters (mm) with minimum, maximum, and typical values for various features (A, B, C, D, F, G, H, J, K, K1, L, L1, M) and angles (a).
| Dim | Min | Max | Typ |
|---|---|---|---|
| A | 0.37 | 0.51 | 0.40 |
| B | 1.20 | 1.40 | 1.30 |
| C | 2.30 | 2.50 | 2.40 |
| D | 0.89 | 1.03 | 0.915 |
| F | 0.45 | 0.60 | 0.535 |
| G | 1.78 | 2.05 | 1.83 |
| H | 2.80 | 3.00 | 2.90 |
| J | 0.013 | 0.10 | 0.05 |
| K | 0.890 | 1.00 | 0.975 |
| K1 | 0.903 | 1.10 | 1.025 |
| L | 0.45 | 0.61 | 0.55 |
| L1 | 0.25 | 0.55 | 0.40 |
| M | 0.085 | 0.150 | 0.110 |
| a | 0° | 8° | -- |
Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
SOT23 Pad Layout
This section provides a recommended PCB pad layout for the SOT23 package. The dimensions for the central pad (X, Y) and adjacent pads (X1, Y1) are given in millimeters.
| Dimensions | Value (in mm) |
|---|---|
| C | 2.0 |
| X | 0.8 |
| X1 | 1.35 |
| Y | 0.9 |
| Y1 | 2.9 |
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