Nec B58944 Datasheet | Fresh – 2027 |

: Internal gates can lock into a permanent "High" or "Low" state, keeping critical components like fuel pumps or injection systems permanently engaged or entirely unresponsive. Component Replacement Sourcing

The provides the essential technical specifications for a highly specialized, proprietary automotive integrated circuit (IC) widely used as an engine driver chip in Bosch Engine Control Units (ECUs) . Commonly paired or co-marked with the memory designation D43256BGU-70Y , this surface-mount component is critical for vehicle diagnostics, engine management, and ECU repair.

): Low junction-to-case resistance to allow for massive heat transfer to a heatsink. Common Applications

If you are looking for a specific replacement or need to verify a circuit design, I can help further if you tell me: The of your circuit The maximum current you expect the part to handle nec b58944 datasheet

: SOP-28 (Small Outline Package, 28 pins) or SO-28.

These parameters describe the operational behavior of the transistor under specified test conditions.

Primarily found in Bosch ECUs for brands like Honda , Iveco , and various Volvo models (e.g., EDC16, ME7 series). Status: Lead-free and RoHS Compliant . Why It’s a "Must-Have" for ECU Repair : Internal gates can lock into a permanent

The NEC B58944 is a . It was designed primarily for high-frequency amplification and switching applications. Because it was manufactured during an era of robust analog and early digital expansion, it is known for its reliability and stable thermal characteristics. Key Specifications (Typical)

| Parameter | Symbol | Typical NEC Value | Meaning | | :--- | :--- | :--- | :--- | | Supply Voltage | VCC | e.g., 7V | Max voltage before damage | | Power Dissipation | PD | e.g., 500mW | Use heatsink if exceeded | | Junction Temp | Tj | 150°C | Max internal temp |

The B58944 is a frequent "point of failure" in aging automotive hardware. Because it handles critical data streams within the ECU, a malfunction can lead to severe engine performance issues, "no-start" conditions, or communication errors with diagnostic tools. ): Low junction-to-case resistance to allow for massive

While a dedicated, single datasheet for the "B58944" itself is not available, the component is well-documented under its primary part number, the series. You can use this information to find the relevant documentation. Here are the core specifications you would find in its datasheet:

The NEC is a high-voltage, high-speed NPN power transistor designed for use in high-definition television (HDTV) horizontal deflection circuits and other high-voltage switching applications. It utilizes a diffusion prescaler structure to achieve high breakdown voltage and fast switching speeds. This component is characterized by its high collector current capability and robust power dissipation rating, making it suitable for driving inductive loads such as deflection yokes and flyback transformers.

Resistance is high (e.g., at 0°C, R ≈ 32kΩ).

Tell me whether you have a scanned PDF or a photo of the part marking, or confirm the exact package and full part code. I can then locate the precise datasheet numbers (pinout tables, absolute max values, detailed electrical characteristics) and produce a component-specific summary, BOM notes, and recommended schematic snippets.