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

Diodes Incorporated 2DA1774QQ-7

Name: 2DA1774QQ-7
Brand: Diodes Incorporated
SKU: 2DA1774QQ-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2DA1774QQ-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: SOT-523

Datasheet:: 2DA1774QQ-7.pdf

Description:: TRANS PNP 50V 0.15A SOT-523

Quantity:: RFQ Add To RFQ list

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Inventory:3,925

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Product details

Overview

2DA1774QQ from Diodes Incorporated is a 60V PNP small-signal bipolar junction transistor (BJT) in SOT523 package, rated for -150mA continuous collector current, -50V V_CEO, and AEC-Q101 qualified for automotive use. It delivers h_FE = 120–270 at -6V V_CE and -1mA I_C, with f_T = 140MHz, supporting high-speed switching in engine control modules and body electronics.

For engineers reviewing the 2DA1774QQ datasheet, 2DA1774QQ pinout, 2DA1774QQ application, or 2DA1774QQ equivalent, key selection criteria include its AEC-Q101 qualification, -50V V_CEO rating, 140MHz f_T, SOT523 ultra-small footprint, and suitability for automotive load switching and signal amplification where space-constrained reliability is critical.

Technical Context

This PNP BJT operates with emitter-grounded configuration in linear and saturated switching modes. Its -50V V_CEO and -60V V_CBO support robust voltage margin in 12V/24V automotive systems, while 140MHz f_T enables stable operation up to mid-frequency signal conditioning.

Thermal performance is defined by R_θJA = 833°C/W on standard 1oz FR-4 PCB, limiting steady-state power dissipation to 150mW at +25°C ambient. ESD ratings meet JEDEC Class 3A HBM (4kV) and MM (400V), aligning with automotive board-level robustness requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-50V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C (cont.)	-150mA - Continuous DC collector current capability under thermal limits
h_FE	120–270 - DC current gain range at V_CE = -6V, I_C = -1mA, defining base drive sizing
f_T	140MHz - Transition frequency indicating usable bandwidth for small-signal amplification
P_D	150mW - Max power dissipation at +25°C ambient on standard PCB layout
ESD HBM	4,000V - Human Body Model rating confirming board-level ESD resilience per JEDEC JESD22-A114

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), lead-free, halogen-free, and RoHS-compliant, optimized for high-density automotive PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal	Current source node in PNP operation; connects to higher potential rail in switching applications
2 (Base)	Control input	Receives reverse-biased current to turn device ON; requires current-limiting resistor in series
3 (Collector)	Output terminal	Sinks current to ground or low-side load; electrically isolated from PCB pad via molded plastic body

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade temperature cycling (-55°C to +150°C), vibration, and lifetime reliability
Ultra-small SOT523 footprint	1.60 × 1.60 mm outline enables placement in tight spaces like door module PCBs and sensor subassemblies
High f_T (140MHz)	Supports fast switching in PWM-controlled lighting drivers and CAN bus interface bias circuits
Green compound (UL 94V-0)	Molded plastic meets flammability safety standards for enclosed automotive compartments

Applications

Engine Control Unit (ECU) Signal Conditioning

Automotive LED Headlamp Dimming

Use Scenario: Amplifying low-level sensor signals (e.g., knock sensor output) prior to ADC sampling in ECU mainboard.

IC Role / Device Role / Timing Role: PNP BJT configured as common-emitter amplifier with fixed bias network.

Use Value: h_FE = 120–270 ensures predictable gain stability across -40°C to +125°C operating range.

Use Scenario: Switching current to high-brightness LED strings in adaptive front-lighting systems (AFS).

IC Role / Device Role / Timing Role: Low-side saturated switch controlling LED cathode path with PWM duty cycle modulation.

Use Value: -150mA I_C rating supports multi-LED string loads; -50V V_CEO accommodates transient spikes in 24V truck systems.

Body Control Module (BCM) Load Driver

Automotive HVAC Blower Motor Control

Use Scenario: Driving resistive and inductive loads such as window lift relays and mirror fold actuators.

IC Role / Device Role / Timing Role: PNP switch with flyback diode protection, interfacing microcontroller GPIO to 12V loads.

Use Value: ESD HBM = 4kV prevents latch-up during assembly and field service handling in production environments.

Use Scenario: Regulating blower motor speed via linear current control in climate control subsystems.

IC Role / Device Role / Timing Role: Linear-mode PNP pass element in adjustable current sink configuration.

Use Value: 150mW P_D and 833°C/W R_θJA allow thermally safe operation at 100mA continuous with minimal heatsinking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-25LT1G	V_CEO = -45V, h_FE = 160–400, SOT23 package (larger footprint)	Lower voltage rating; not AEC-Q101 qualified; suitable for non-automotive consumer designs	Select only if AEC-Q101 compliance is not required and board space permits SOT23
DXT7050Q-7	V_CEO = -50V, h_FE = 100–300, SOT523 package, AEC-Q101 qualified	Same package and qualification; lower f_T (100MHz) and higher V_CE(sat) (-0.7V @ -50mA)	Acceptable for slower switching or less demanding gain-bandwidth needs; verify saturation voltage impact on power loss

Compared with BC807-25LT1G and DXT7050Q-7, the 2DA1774QQ provides superior high-frequency response (140MHz f_T) and tighter V_CE(sat) (-0.5V), making it optimal for automotive PWM-driven loads where efficiency and signal fidelity are prioritized.

Availability

2DA1774QQ is available at Aetrix Electronics and suitable for engine control units, body control modules, LED lighting systems, and HVAC subsystems requiring stable component supply with full automotive qualification traceability.

Supply support for 2DA1774QQ 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The 2DA1774QQ belongs to Diodes' automotive-qualified small-signal transistor product line, engineered specifically for reliable switching and amplification in harsh-temperature vehicle subsystems.

FAQ

What is the maximum allowable collector-emitter voltage for continuous operation?

The 2DA1774QQ has a guaranteed minimum V_CEO of -50V under standard test conditions (I_C = -1mA). Operation beyond this value risks avalanche breakdown and permanent damage. Derating is required above +25°C ambient per the thermal curve in Figure 1 of DS42978.

Is the 2DA1774QQ suitable for linear (analog) amplification applications?

Yes - its h_FE range of 120–270 at V_CE = -6V and I_C = -1mA, combined with f_T = 140MHz, supports stable small-signal amplification in automotive sensor interfaces. Thermal derating must be applied for sustained linear-mode power dissipation.

Does the SOT523 package support automated optical inspection (AOI) after reflow?

Yes - the SOT523's standardized footprint, matte tin-plated leads, and consistent mold compound reflectivity enable reliable AOI detection. Diodes specifies IPC-compliant solderable terminations and J-STD-020 Level 1 moisture sensitivity, ensuring compatibility with standard SMT lines.

How does the AEC-Q101 qualification impact supply chain assurance?

AEC-Q101 qualification confirms that each 2DA1774QQ lot undergoes accelerated stress testing (HTOL, TC, UHAST) and statistical process control per IATF 16949. This enables Aetrix to offer extended traceability, PPAP documentation, and priority allocation for automotive production programs.

2DA1774QQ-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-523

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

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:: 120 @ 1mA, 6V

Power - Max:: 150 mW

Frequency - Transition:: 140MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-523

2DA1774QQ-7 FAQ

1.How can I place an order for 2DA1774QQ-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2DA1774QQ-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 2DA1774QQ-7 reliable?

The price and inventory of 2DA1774QQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2DA1774QQ-7 is usually 5 days.

3.What payment methods are accepted for 2DA1774QQ-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2DA1774QQ-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2DA1774QQ-7?

2DA1774QQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2DA1774QQ-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 2DA1774QQ-7?

For technical support, including 2DA1774QQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2DA1774QQ-7 requirements.

6.How does Aetrix verify that 2DA1774QQ-7 is sourced from the original manufacturer or authorized distributors?

All 2DA1774QQ-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 2DA1774QQ-7 meets industry standards.

7.What is the process for return or replacement of 2DA1774QQ-7?

All 2DA1774QQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with 2DA1774QQ-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 2DA1774QQ-7 part is unused and in its original packaging.

Return procedure for 2DA1774QQ-7:

1.Submit a request within 90 days.

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

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