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The JRC CBD‑1645 is a marine power supply unit made by Japan Radio Co., Ltd. (JRC) for use with marine navigation radar systems — especially the JRC JMA‑5300 radar series. It’s an original equipment manufacturer (OEM) component designed to convert and regulate electrical power so the radar operates safely.
Stable Power Delivery: Converts the ship’s onboard electrical voltage (typically 24 V DC, common on boats) into the correct, conditioned power needed by the radar’s electronics.
Protects Sensitive Electronics: Supplies a constant voltage and current to protect the radar’s delicate circuits from fluctuations and electrical noise.
Marine‑Grade Build: Designed for harsh maritime environments — resistant to vibration and shocks typically encountered at sea.
OEM Component: Genuine JRC spare part built to original factory specifications, ensuring compatibility and long service life with the JMA‑5300 radar family.
Nominal Input Voltage: Designed for 24 V DC marine electrical systems (common onboard ships).
Input Voltage Range: Typically around +24 V DC (exact range varies by installation and radar model).
Output: Provides regulated voltage and current to the radar antenna unit and display unit of the JMA‑5300 series.
While the exact power supply PCB (CBD‑1645) specifications aren’t individually listed, associated system manuals for the JMA‑5300 radar series provide context for system‑level performance:
Operating Power Supply Voltage for Radar System: DC 21.6 V – 36 V (for radar system using 24 V nominal supply).
Typical Power Consumption (System Level): Radar systems powered by this supply may draw up to ~200 W–700 W depending on configuration (display + scanner combined).
Ambient Temperature (Radar System Range): around ‑25 °C to +55 °C typical for marine equipment.
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