Suggested Feature Summary — "NEC b58944 datasheet hot"

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NEC b58944 — Quick Specs & Thermal (Hot) Characteristics

Search Tip: If you cannot find "B58944", try searching for the full part number convention used by NEC: uPC58944 or NEC uPC58944.

Introduction

• Thermal Resistance, Junction-to-Case (RθJC): Typical values range from 1.0°C/W to 3.0°C/W for power devices. Lower is better.
• Thermal Resistance, Junction-to-Ambient (RθJA): Without a heatsink, this might be 60°C/W – completely unusable for power applications.

| Parameter | Min | Typ | Max | Unit | | --- | --- | --- | --- | --- | | Operating Voltage | 4.5 | 5.0 | 5.5 | V | | Frequency Range | 50 | - | 1000 | MHz | | Gain | 18 | 20 | 22 | dB | | Noise Figure | - | 2.5 | - | dB |

The term "hot" in your query likely refers to the chip's tendency to overheat or burn out in automotive environments.

Common Applications Where the NEC B58944 Runs “Hot”

Based on typical NEC part numbering from the 1990s-2000s, a transistor like the B58944 would be found in:

• Always refer to the latest datasheet for the most current specifications.
• Ensure that the device is operated within its specified SOA to prevent damage.
• Consider thermal management practices to maintain junction temperature within safe limits.

Here’s a quick breakdown of what’s likely happening: