This article provides a deep-dive reference for the , compiling available technical data, pinout configurations, electrical characteristics, typical applications, and replacement strategies. Given that NEC no longer publishes original datasheets for this legacy component on its primary domain, this guide synthesizes information from archival sources, service manuals, and industry-standard testing data as of the 2021 timeframe.
| Parameter | Value | Unit | |-----------|-------|------| | Collector-Base Voltage (VCBO) | 80 - 100 V | V | | Collector-Emitter Voltage (VCEO) | 60 - 80 V | V | | Emitter-Base Voltage (VEBO) | 5 V | V | | Collector Current (IC) | 3 A | A | | Base Current (IB) | 0.5 A | A | | Power Dissipation (PC) | 25 W (with heatsink) | W | | Junction Temperature (TJ) | -55 to +150 | °C | | Storage Temperature (TSTG) | -55 to +150 | °C |
: Throttles performance or shuts down safely if ambient internal engine bay temperatures exceed maximum tolerances.
The B58944 features 14 signal inputs (E₁–E₁₄), where a low signal activates the corresponding low-side switches. 3. Major Applications (2021-2026)
The on the aluminum ECU casing (e.g.,0 261...) What fault codes or behaviors the vehicle is exhibiting nec b58944 datasheet 2021
| Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | | $V_DSS$ | 60 | V | | Gate-Source Voltage | $V_GSS$ | $\pm 20$ | V | | Drain Current (DC) | $I_D$ | 50 - 80 (variant dependent) | A | | Drain Current (Pulse) | $I_DP$ | Up to 200 | A | | Channel Temperature | $T_ch$ | 150 | $^\circ C$ | | Storage Temperature | $T_stg$ | -55 to 150 | $^\circ C$ |
The NEC B58944 functions as a core driver IC responsible for executing micro-commands from the central processor and converting them into raw power to actuate engine variables. The 2021 documentation updates reveal an interior structure built to survive harsh automotive environments under the hood. Integrated Sub-systems
Intermittent loss of communication with onboard OBD-II diagnostic scanners.
– B58944 may be:
NEC B58944 is an integrated circuit (IC) primarily used as an SRAM (Static Random-Access Memory)
Modern legacy support handled under Renesas Electronics product lines following their corporate merger with NEC. Diagnostics, Failure Modes, and Repair
The is a specialized automotive Engine Control Unit (ECU) driver integrated circuit designed primarily for Bosch engine management systems . Packaged in a standard 28-pin Small Outline Package (SOP-28), this component acts as an essential signal driver and power management interface within commercial diesel and gasoline engine computers. Technical datasheets updated in 2021 emphasize its role in legacy and contemporary powertrain control architectures.
Standard OBD-II scanners may display codes like P0606 (ECU/PCM Processor Fault) or Bosch-specific memory parity errors. This article provides a deep-dive reference for the
The B58944 is an N-channel enhancement mode Power MOSFET. It is designed for low-voltage, high-current applications where efficiency and thermal management are critical.
When performing a reflash or full replacement, tools that read/write data through the ECU's OBD (On-Board Diagnostics) or BDM (Background Debug Mode) interface are required. Always take precautions to backup and preserve these codes beforehand.
If your repair or design absolutely requires the original NEC B58944, your best course of action in 2021 and beyond is to:
Though dependent on specific implementations, ICs in this class (such as those described in) are designed with protection mechanisms, including over-temperature protection, short-circuit detection, and reverse-polarity protection. Troubleshooting and Replacing the B58944 The B58944 features 14 signal inputs (E₁–E₁₄), where