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Diodes Incorporated AC847CQ-7
- Part No.:
- AC847CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AC847CQ-7.pdf
- Description:
- TRANS NPN 45V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
AC847CQ-7 from Diodes Incorporated is an AEC-Q101 qualified NPN small-signal transistor in SOT23 package, designed for automotive switching and audio-frequency amplifier applications. It delivers DC current gain (hFE) of 420–800 at IC = 2 mA, VCE = 5 V; VCEO = 45 V; IC = 100 mA continuous; and fT = 100–300 MHz - enabling robust performance in engine control modules and body electronics.
For engineers reviewing the AC847CQ-7 datasheet, AC847CQ-7 pinout, AC847CQ-7 application, or AC847CQ-7 equivalent, key selection criteria include its automotive qualification status, high hFE band C grouping, low VCE(sat) (90–250 mV at IC = 10 mA), thermal resistance (RθJA = 403 °C/W on minimal pad layout), and RoHS/"Green" compliance with halogen/antimony restrictions.
Technical Context
This NPN BJT operates as a linear amplifier or saturated switch in low-power automotive subsystems. Its high DC current gain (min 420) and wide fT range support stable AF amplification up to ~300 MHz while maintaining low distortion under pulsed conditions (duty cycle ≤ 2%, pulse width ≤ 300 µs).
The device features tight parameter binning (Band C hFE group), ESD robustness (HBM 4 kV), and thermal design support via documented RθJA/RθJL values and derating curves - all validated under AEC-Q101 stress testing and manufactured in IATF 16949-certified facilities.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - supports reliable operation in 12 V automotive systems with transient overvoltage margin |
| hFE (IC = 2 mA) | 420–800 - enables precise biasing and high loop gain in feedback amplifier stages |
| fT | 100–300 MHz - ensures usable bandwidth for audio preamplifiers and signal conditioning circuits |
| VCE(sat) | 90–250 mV @ IC = 10 mA - minimizes conduction loss in low-side switching applications |
| PD | 310 mW (min pad) - defines maximum dissipation before thermal derating begins at ambient >25°C |
| ESD HBM | 4000 V - provides handling robustness during automated assembly and board-level integration |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink terminal | Connected to ground or low-impedance return path; determines bias stability in common-emitter configurations |
| 2 (Base) | Control input | Receives drive current to modulate collector current; requires series resistor for current limiting in digital switching |
| 3 (Collector) | Current source terminal | Delivers amplified output current; routed to load or next stage; voltage swing limited by VCEO rating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity, and mechanical shock per JESD47 |
| Band C hFE grouping | Guaranteed 420–800 hFE at 2 mA enables consistent gain matching across production lots |
| Lead-free & "Green" | Halogen-free (<900 ppm Br/Cl), antimony-free (<1000 ppm), fully RoHS 3 compliant |
| SOT23 footprint | Standardized 3-pin layout compatible with high-speed pick-and-place and reflow soldering processes |
Applications
| Engine Control Unit (ECU) Signal Conditioning | Automotive Door Module Switch Drivers |
|---|---|
Use Scenario: Amplifying sensor signals (e.g., throttle position, knock detection) prior to ADC sampling in engine management systems. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with fixed bias network. Use Value: High hFE and low noise figure (2–10 dB) preserve SNR in millivolt-level analog inputs under EMI-rich under-hood conditions. | Use Scenario: Driving LED indicators and small solenoids (e.g., power window lock/unlock actuators) in door control modules. IC Role / Device Role / Timing Role: Low-side saturated switch controlled by microcontroller GPIO. Use Value: VCE(sat) ≤ 250 mV at 10 mA reduces heat generation and extends PCB trace lifetime in space-constrained modules. |
| Body Control Module (BCM) Audio Preamp Stage | Automotive HVAC Fan Speed Controller |
Use Scenario: First-stage amplification of microphone or audio line-in signals in infotainment head units. IC Role / Device Role / Timing Role: Linear amplifier with emitter degeneration for gain stability and THD reduction. Use Value: fT ≥ 100 MHz ensures flat frequency response across full audio band (20 Hz–20 kHz) with margin for filtering. | Use Scenario: PWM-controlled interface between MCU and brush-type blower motor in climate control systems. IC Role / Device Role / Timing Role: Switching transistor in low-side driver circuit with flyback diode protection. Use Value: 100 mA continuous rating and 200 mA peak capability support typical fan currents while maintaining <100 mW dissipation at 50% duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847C,215 (Nexperia) | Same SOT23 package, hFE = 420–800, but only AEC-Q101 qualified in specific grade (AEC-Q101-Q2); no guaranteed 4 kV HBM rating | Lacks Diodes' documented 4 kV HBM and full PPAP capability for Tier 1 automotive programs | Select if cost-sensitive and qualification depth is less critical than full AEC-Q101 + PPAP + IATF16949 traceability |
| MMBT3904LT1G (onsemi) | hFE = 100–300 (lower gain band), VCEO = 40 V, fT = 300 MHz, AEC-Q101 qualified but not PPAP-capable | Lower gain limits closed-loop stability in precision amplifier designs; reduced VCEO margin in 12 V transients | Choose where higher fT dominates over gain consistency, and PPAP documentation is not required |
Compared with BC847C,215 and MMBT3904LT1G, AC847CQ-7 uniquely combines Band C hFE, 45 V VCEO, 4 kV HBM, and full PPAP/IATF16949 support - making it the preferred choice for safety-critical automotive signal paths requiring audit-ready supply chain validation.
Availability
AC847CQ-7 is available at Aetrix Electronics and suitable for engine control units, body control modules, automotive door modules, and HVAC fan controllers requiring stable component supply across multi-year vehicle production cycles.
Supply support for AC847CQ-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The AC847 series belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive signal amplification and switching functions where gain consistency, thermal resilience, and process traceability are mandatory.
FAQ
What is the marking code for AC847CQ-7 on the SOT23 package?
The top-side marking for AC847CQ-7 is "2C9", followed by a date code (e.g., "M9" for September 2025). This marking is laser-etched on the device surface and matches the ordering information table in DS39448 Rev. 4–2. The "2C9" identifies both the part number and Band C hFE grouping, enabling visual verification during incoming inspection.
Does AC847CQ-7 support lead-free reflow soldering per JEDEC J-STD-020?
Yes - AC847CQ-7 has Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking. Its matte tin-plated leads are fully compatible with standard Pb-free reflow profiles (peak 260°C), and the molding compound meets UL 94V-0 flammability requirements for automotive PCB assemblies.
How does the thermal resistance of AC847CQ-7 vary with PCB copper area?
RθJA is 403 °C/W on minimum recommended pad layout (1 oz copper, single-sided FR-4), and improves to 357 °C/W when mounted on a 15 mm × 15 mm 1 oz copper area. This 11% reduction reflects enhanced heat spreading - critical for sustained 100 mA operation in compact automotive modules where airflow is restricted.
Is AC847CQ-7 pin-compatible with AC847BQ-7 or AC848BQ-7?
Yes - all three parts share identical SOT23 pinout (Emitter-Base-Collector on pins 1–2–3) and mechanical dimensions. However, they differ electrically: AC847BQ-7 has hFE = 200–450 (Band B), AC847CQ-7 has hFE = 420–800 (Band C), and AC848BQ-7 has lower VCEO/VCBO (30 V) and hFE = 200–450. Substitution requires verifying gain and voltage margin in the target circuit.
AC847CQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AC847CQ-7 FAQ
1.How can I place an order for AC847CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AC847CQ-7 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 AC847CQ-7 reliable?
The price and inventory of AC847CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AC847CQ-7 is usually 5 days.
3.What payment methods are accepted for AC847CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AC847CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AC847CQ-7?
AC847CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AC847CQ-7 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 AC847CQ-7?
For technical support, including AC847CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AC847CQ-7 requirements.
6.How does Aetrix verify that AC847CQ-7 is sourced from the original manufacturer or authorized distributors?
All AC847CQ-7 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 AC847CQ-7 meets industry standards.
7.What is the process for return or replacement of AC847CQ-7?
All AC847CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with AC847CQ-7, 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 AC847CQ-7 part is unused and in its original packaging.
Return procedure for AC847CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AC847CQ-7 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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