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

Diodes Incorporated 2DA1774R-7

Name: 2DA1774R-7
Brand: Diodes Incorporated
SKU: 2DA1774R-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2DA1774R-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: 2DA1774R-7.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:228

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Product details

Overview

2DA1774R-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, used in low-power switching and amplification circuits in automotive body control modules and portable power management systems.

For engineers reviewing the 2DA1774R-7 datasheet, 2DA1774R-7 pinout, 2DA1774R-7 application, or 2DA1774R-7 equivalent, key selection criteria include its AEC-Q101 qualification, h_FE range of 180–390 at -1mA/-6V, V_CE(sat) ≤ -0.5V at -50mA/-5mA, and ESD HBM rating of 4,000V - all critical for robust operation in automotive and industrial signal conditioning designs.

Technical Context

This PNP bipolar junction transistor operates with emitter-base forward bias and collector-base reverse bias in active or saturation mode. Its -50V V_CEO and -60V V_CBO support high-side switching in 24V automotive subsystems, while f_T = 140MHz enables RF-coupled preamplifier stages up to ~100MHz.

The device uses a planar epitaxial structure with matte tin-plated leads and meets JEDEC moisture sensitivity Level 1. Thermal resistance R_θJA = 833°C/W reflects its ultra-small SOT523 footprint (1.6mm × 1.6mm), requiring minimal PCB copper area for thermal management.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-50V - supports reliable cutoff and safe operation in 24V rail-switching applications
I_C (cont.)	-150mA - sufficient drive capability for LED drivers and relay coils in compact modules
h_FE	180–390 @ -1mA/-6V - ensures stable DC gain across production lots for feedback control loops
V_CE(sat)	≤ -0.5V @ -50mA/-5mA - minimizes conduction loss in high-efficiency load switches
f_T	140MHz - enables use in IF amplifiers and fast digital signal inversion
ESD HBM	4,000V - provides handling robustness during automated assembly and field service
P_D	150mW @ +25°C - defines maximum steady-state power under still-air conditions on standard FR-4

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic case (1.60mm × 1.60mm × 0.75mm), UL 94V-0 rated, weight ≈ 0.002g, moisture sensitivity Level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to higher-potential rail in high-side switch configuration
2 (Base)	B	Control input; requires ~-5mA drive for full saturation at -50mA collector load
3 (Collector)	C	Output node; ties to load and ground return path in common-emitter topology

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including BCM, lighting control, and sensor interface modules
Ultra-small SOT523 footprint	Enables <1.0mm² board space usage - ideal for space-constrained modules like smart sensors and wearables
Halogen- and antimony-free "Green" construction	Meets <900ppm Br, <900ppm Cl, <1000ppm Sb - compliant with global environmental regulations
Matte tin-plated leads	Solderable per MIL-STD-202 Method 208 - ensures reliability in reflow and wave solder processes

Applications

Automotive Body Control Module

Portable Power Management

Use Scenario: Driving discrete LEDs and small solenoids in door lock actuators and interior lighting.

IC Role / Device Role / Timing Role: PNP switch controlling 12–24V loads with logic-level base drive from MCU GPIO.

Use Value: -50V V_CEO prevents breakdown during load dump transients; -0.5V V_CE(sat) limits self-heating in thermally constrained housings.

Use Scenario: Enabling/disabling auxiliary rails in battery-powered IoT nodes and handheld medical devices.

IC Role / Device Role / Timing Role: Low-leakage high-side switch isolating standby power domains.

Use Value: -100nA I_CBO at -60V ensures <1μA quiescent current in off-state - extends battery life in always-on monitoring modes.

Industrial Sensor Interface

Consumer Audio Signal Inversion

Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor networks) before ADC input.

IC Role / Device Role / Timing Role: Common-emitter amplifier with fixed bias for DC-coupled signal conditioning.

Use Value: h_FE = 180–390 ensures predictable gain stability over temperature (-55°C to +150°C).

Use Scenario: Inverting audio line signals in headphone amplifiers and portable DAC output stages.

IC Role / Device Role / Timing Role: Small-signal amplifier operating in active region with 140MHz f_T.

Use Value: 4.0–5.0pF C_obo minimizes capacitive loading on preceding stage - preserves bandwidth up to 20kHz.

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
2DA1774Q-7-F	Lower h_FE range (120–270) and same package/ratings	Preferred where tighter gain tolerance is needed in feedback-controlled current sources	Select when lower DC gain variability improves loop stability
BC807-25W	SOT323 package (larger), V_CEO = -45V, h_FE = 220–475, non-AEC-Q101	Used in commercial-grade consumer electronics without automotive qualification requirements	Choose only if AEC-Q101 compliance is not required and board space allows larger footprint

Compared with 2DA1774Q-7-F, the 2DA1774R-7 offers higher and more linear h_FE for precision biasing; versus BC807-25W, it delivers AEC-Q101 assurance and superior voltage margin in 24V systems - making it optimal for automotive-qualified compact switching.

Availability

2DA1774R-7 is available at Aetrix Electronics and suitable for automotive body control modules, portable power management systems, industrial sensor interfaces, and consumer audio signal inversion requiring stable component supply and AEC-Q101 traceability.

Supply support for 2DA1774R-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 North America.

The 2DA1774R-7 belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive and industrial applications demanding high reliability, tight parametric consistency, and green material compliance.

FAQ

Is 2DA1774R-7 pin-compatible with 2DA1774Q-7-F and 2DA1774S-7-F?

Yes - all three variants share identical SOT523 package dimensions, pin assignment (Emitter-Base-Collector on pins 1-2-3), and mechanical footprint. The only differences are h_FE binning and lifecycle status (2DA1774S-7-F is obsolete). No PCB redesign is needed when substituting within the Q/R/S family.

What is the maximum allowable ambient temperature for continuous operation at full rated current?

At I_C = -150mA, derating begins above +25°C due to thermal limits. With R_θJA = 833°C/W and P_D = 150mW, junction temperature reaches 150°C at T_A ≈ +33°C. For reliable long-term operation, ambient must be held ≤ +25°C at full load, or current reduced per Fig. 1 derating curve.

Does 2DA1774R-7 support lead-free reflow soldering per JEDEC J-STD-020?

Yes - the device is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and withstand standard Pb-free reflow profiles (peak 260°C) without baking. Matte tin plating ensures compatibility with both SnPb and SAC305 solder alloys.

Can 2DA1774R-7 replace BC857B in existing designs?

No - although both are PNP transistors, BC857B uses SOT23 (larger) and has V_CEO = -45V, h_FE = 200–450, and no AEC-Q101 qualification. Direct substitution would require PCB pad revision and may compromise transient robustness in automotive environments due to lower voltage rating.

2DA1774R-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:: -

2DA1774R-7 FAQ

1.How can I place an order for 2DA1774R-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2DA1774R-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 2DA1774R-7 reliable?

The price and inventory of 2DA1774R-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2DA1774R-7 is usually 5 days.

3.What payment methods are accepted for 2DA1774R-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2DA1774R-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2DA1774R-7?

2DA1774R-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2DA1774R-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 2DA1774R-7?

For technical support, including 2DA1774R-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2DA1774R-7 requirements.

6.How does Aetrix verify that 2DA1774R-7 is sourced from the original manufacturer or authorized distributors?

All 2DA1774R-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 2DA1774R-7 meets industry standards.

7.What is the process for return or replacement of 2DA1774R-7?

All 2DA1774R-7 units undergo pre-shipment inspection (PSI). If there is an issue with 2DA1774R-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 2DA1774R-7 part is unused and in its original packaging.

Return procedure for 2DA1774R-7:

1.Submit a request within 90 days.

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

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