Diodes Incorporated DDTB114GU-7-F

Overview

DDTB114GU-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT323 package, featuring R1 = 0 Ω (shorted) and R2 = 10 kΩ bias resistors. It delivers V_CEO = −40 V, I_C = −500 mA max, V_CE(sat) = −0.3 V at I_C = −50 mA/I_B = −2.5 mA, and h_FE = 56 (min) at I_C = −5 mA/V_CE = −5 V. It is used in discrete logic-level switching and level-shifting circuits in automotive body control modules.

For engineers reviewing the DDTB114GU-7-F datasheet, DDTB114GU-7-F pinout, DDTB114GU-7-F application, or DDTB114GU-7-F equivalent, key selection criteria include emitter-base breakdown voltage (BVEBO = −5 V), input current at VI = −5 V (−0.88 mA), DC current gain, saturation voltage under load, and SOT323 thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates a PNP bipolar junction transistor with a single external base resistor (R2 = 10 kΩ) and no R1 (shorted), enabling direct logic-level drive without external biasing. Its −5 V BVEBO rating supports compatibility with 3.3 V/5 V CMOS/TTL inputs while maintaining safe reverse-bias margin.

The SOT323 package provides low thermal resistance (625 °C/W on FR4) and supports automated placement. With I_C = −500 mA absolute max and P_D = 200 mW, it operates reliably in intermittent switching applications where power dissipation remains below derated limits at ambient temperatures up to +125 °C.

Key Specifications

Pinout & Package

Package: SOT323 - surface-mount, 3-terminal plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased transistor applications.

Compared with DDTB114TU-7-F and DDTB123YU-7-F, DDTB114GU-7-F uniquely offers R1 shorted (0 Ω) and R2 = 10 kΩ, enabling direct high-side logic-level activation with minimal external components-ideal for space-constrained, low-component-count switching nodes.

Availability

DDTB114GU-7-F is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC output stages, and consumer appliance power sequencing requiring stable component supply and long-term obsolescence management.

Supply support for DDTB114GU-7-F 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, automotive-qualified, and green-compliant components.

The DDTB series targets cost-sensitive, space-constrained discrete switching applications where integrated biasing improves manufacturability and reduces bill-of-materials count in automotive, industrial, and consumer electronics.

FAQ

What is the function of the shorted R1 in DDTB114GU-7-F?

R1 is internally shorted (0 Ω), connecting the base directly to the emitter through the integrated resistor network. This configuration allows the device to operate as a single-resistor (R2-only) pre-biased PNP transistor, simplifying drive circuitry by eliminating the need for an external base pull-down resistor and enabling direct logic-high activation.

Can DDTB114GU-7-F replace a standard PNP transistor like MMBT3906?

Yes, but only when the application benefits from built-in biasing. Unlike MMBT3906, DDTB114GU-7-F includes R2 = 10 kΩ to emitter and shorted R1, reducing external components. However, its fixed bias network limits flexibility in gain tuning or dynamic base control compared to discrete transistors.

Is DDTB114GU-7-F qualified for automotive use per AEC-Q101?

No-DDTB114GU-7-F is not AEC-Q101 qualified. The datasheet states that automotive-qualified versions require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is marked "Standard" and listed as Obsolete in ordering information, indicating it is intended for industrial/consumer applications.

What is the significance of the "-7-F" suffix in the part number?

The "-7-F" suffix denotes tape-and-reel packaging: "-7" indicates 7-inch reel, and "-F" signifies lead-free, RoHS-compliant finish. The device ships in 3,000-unit reels with 8 mm tape width and complies with J-STD-020 moisture sensitivity level 1.