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

Diodes Incorporated 2DA1774S-7

Name: 2DA1774S-7
Brand: Diodes Incorporated
SKU: 2DA1774S-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2DA1774S-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: 2DA1774S-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:7

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Product details

Overview

2DA1774S-7 from Diodes Incorporated is a 60V PNP small-signal transistor in SOT523 package, rated for -150mA continuous collector current, -50V V_CEO, and 150mW power dissipation. It delivers h_FE = 270–560 at V_CE = -6V and I_C = -1mA, with f_T = 140MHz, and is qualified to AEC-Q101 for automotive-grade reliability in biasing, switching, and amplification circuits.

For engineers reviewing the 2DA1774S-7 datasheet, 2DA1774S-7 pinout, 2DA1774S-7 application, or 2DA1774S-7 equivalent, key selection criteria include its PNP polarity, SOT523 ultra-small footprint, -50V V_CEO rating, 140MHz f_T, and AEC-Q101 qualification - critical for space-constrained automotive and industrial control designs requiring high-reliability discrete transistors.

Technical Context

This PNP bipolar junction transistor operates with emitter-grounded configuration and supports linear amplification and digital switching functions. Its V_(BR)CEO = -50V and V_(BR)CBO = -60V define safe operating voltage limits under reverse-biased conditions, while the 140MHz f_T enables RF-capable signal handling up to mid-VHF range.

The device exhibits low saturation voltage (V_CE(sat) ≤ -0.5V at I_C = -50mA/I_B = -5mA) and tight h_FE binning (270–560), supporting precise current gain matching in matched-pair or feedback amplifier topologies. Its thermal resistance R_θJA = 833°C/W reflects performance on minimal 1oz copper FR-4 PCBs under still-air conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-50V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration
I_C (cont.)	-150mA - Continuous DC collector current limit defining safe switching/amplification load capacity
h_FE	270–560 - DC current gain range at V_CE = -6V, I_C = -1mA, enabling predictable base drive sizing
f_T	140MHz - Transition frequency indicating usable bandwidth for small-signal amplification
P_D	150mW - Maximum steady-state power dissipation at T_A = +25°C on standard PCB layout
R_θJA	833°C/W - Junction-to-ambient thermal resistance, guiding heatsinking and layout decisions
V_CE(sat)	≤ -0.5V - Low saturation voltage at I_C = -50mA/I_B = -5mA, minimizing conduction loss in switch mode

Pinout & Package

SOT523 is a 3-pin ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), optimized for high-density PCB layouts and automated assembly. Its matte tin-plated leads meet MIL-STD-202 solderability requirements, and moisture sensitivity level is J-STD-020 Level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink terminal; connected to ground or lower potential node in PNP operation
2 (Base)	B	Control input; negative voltage relative to emitter turns device ON; requires current-limited drive
3 (Collector)	C	Current source terminal; supplies load current when device is saturated or active

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control modules and body electronics requiring PPAP and IATF 16949 manufacturing
Ultra-small SOT523 footprint	1.60 × 1.60 mm outline enables placement in space-critical locations such as sensor signal conditioning and LED driver bias networks
High V_(BR)CBO = -60V	Supports robust operation in systems with transient voltage spikes or elevated supply rails up to -60V
Low V_CE(sat) ≤ -0.5V	Reduces power loss and self-heating during switching, improving efficiency in pulsed-load drivers
Halogen- and antimony-free "Green" construction	Meets RoHS 3 (2015/863/EU) with <900ppm Br, <900ppm Cl, <1000ppm Sb - compliant for eco-sensitive industrial and automotive programs

Applications

Automotive Door Module

Industrial Sensor Interface

Use Scenario: Driving window motor relays and LED status indicators in door control units.

IC Role / Device Role / Timing Role: PNP switch controlling 12V loads via microcontroller GPIO with inverted logic.

Use Value: -50V V_CEO withstands load-dump transients; SOT523 saves board area in multi-channel modules.

Use Scenario: Amplifying low-level analog signals from pressure or temperature sensors.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage providing fixed-gain signal conditioning before ADC input.

Use Value: h_FE = 270–560 ensures stable gain across temperature; 140MHz f_T preserves signal fidelity up to 10MHz.

USB-C Power Delivery Feedback

Smart Lighting Dimming Circuit

Use Scenario: Biasing optocoupler inputs in isolated feedback loops of USB-C PD adapters.

IC Role / Device Role / Timing Role: Linear current source setting reference current for optocoupler LED drive.

Use Value: Tight h_FE binning ensures consistent current transfer ratio; -0.5V V_CE(sat) minimizes dropout in low-voltage rails.

Use Scenario: Switching MOSFET gate drivers in DALI or 0–10V dimmable LED ballasts.

IC Role / Device Role / Timing Role: Level-shifting and current amplification stage interfacing MCU outputs to high-side gate drivers.

Use Value: 150mW power rating supports continuous PWM operation; AEC-Q101 qualification adds reliability margin for commercial lighting.

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
2DA1774R-7-F	Lower h_FE range (180–390) and same SOT523 package, AEC-Q101 qualified	Preferred where tighter gain tolerance is not required and cost optimization is prioritized	Select when design tolerates wider h_FE variation and lower gain suffices for base drive margin
BC807-40-7-F	Same SOT-23 package (larger than SOT523), h_FE = 250–630, V_CEO = -45V, non-AEC-Q101	Used in general-purpose industrial boards where AEC-Q101 is not mandated and board space allows SOT-23	Choose only if SOT523 footprint is not mandatory and automotive qualification is unnecessary

Compared with 2DA1774R-7-F and BC807-40-7-F, the 2DA1774S-7 offers the highest h_FE bin and smallest footprint among AEC-Q101-qualified PNP transistors in this voltage class - making it optimal for miniaturized, gain-critical automotive subsystems where thermal and spatial constraints are stringent.

Availability

2DA1774S-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, USB-C power delivery feedback circuits, and smart lighting dimming circuits requiring stable component supply despite its obsolete status - supported via legacy inventory and cross-qualified alternatives.

Supply support for 2DA1774S-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The 2DA1774 series belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive body electronics, power management, and sensor interface applications demanding high reliability in harsh environments.

FAQ

Is 2DA1774S-7 still in active production?

No - per Diodes' ordering information, 2DA1774S-7-F is marked "Obsolete". However, Aetrix Electronics maintains legacy stock and supports design continuity through verified alternatives like 2DA1774R-7-F and engineering guidance for drop-in replacement validation.

What is the marking code for 2DA1774S-7?

The top-side marking code for 2DA1774S-7 is "8C", as specified in the Diodes datasheet DS30253 Rev. 11-2. This code appears alongside a two-character date code (e.g., "I9" for September 2021) on the SOT523 package.

Can 2DA1774S-7 replace BC857 in existing designs?

Not directly - BC857 uses SOT-23 packaging (2.9 × 1.3 × 1.0 mm), while 2DA1774S-7 uses SOT523 (1.6 × 1.6 × 0.75 mm). Though both are PNP transistors with overlapping V_CEO and h_FE, the mechanical incompatibility and differing thermal characteristics require PCB redesign and revalidation.

Does 2DA1774S-7 meet JEDEC JESD22-A114 ESD HBM requirements?

Yes - the device is rated for 4,000V Human Body Model (HBM) ESD per JEDEC JESD22-A114, as confirmed in the Electrical Characteristics table of DS30253. This qualifies it for handling in standard ESD-safe manufacturing environments without additional protection circuitry.

2DA1774S-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Cut Tape (CT)

Product Status:: Active

Transistor Type:: -

Current - Collector (Ic) (Max):: -

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

2DA1774S-7 FAQ

1.How can I place an order for 2DA1774S-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2DA1774S-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 2DA1774S-7 reliable?

The price and inventory of 2DA1774S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2DA1774S-7 is usually 5 days.

3.What payment methods are accepted for 2DA1774S-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2DA1774S-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2DA1774S-7?

2DA1774S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2DA1774S-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 2DA1774S-7?

For technical support, including 2DA1774S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2DA1774S-7 requirements.

6.How does Aetrix verify that 2DA1774S-7 is sourced from the original manufacturer or authorized distributors?

All 2DA1774S-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 2DA1774S-7 meets industry standards.

7.What is the process for return or replacement of 2DA1774S-7?

All 2DA1774S-7 units undergo pre-shipment inspection (PSI). If there is an issue with 2DA1774S-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 2DA1774S-7 part is unused and in its original packaging.

Return procedure for 2DA1774S-7:

1.Submit a request within 90 days.

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

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