DC-DC 7V-60V to 5V 5A 4 USB Output Buck Converter Step down Power Supply +Case M

KOEED · Power Conversion · DC-DC Step-Down Converters · In stock

What Is This DC-DC Buck Converter?

This is a DC-DC step-down (buck) converter that accepts a wide input voltage range of 7V to 60V DC and regulates it down to a fixed 5V DC output with a total current capacity of 5 amps. The output power is distributed across four USB type-A female ports, making it essentially a heavy-duty vehicle or industrial USB charging hub that runs directly from a 12V, 24V, 36V, or 48V battery system without any intermediate adapter. It includes an aluminum enclosure ("Case M") that serves as both mechanical protection and a heat sink for the switching MOSFET and output rectifier. Unlike consumer USB car chargers that plug into a cigarette lighter socket and deliver 1-2 amps total, this converter hard-wires into the vehicle or equipment electrical system and can charge or power four USB devices simultaneously at full current.

In short: If you need to add reliable USB charging to a vehicle, boat, solar battery system, or industrial cabinet that runs on 12V to 48V DC, this buck converter provides four 5V USB ports with 5A total capacity — in stock at koeed.com.

Where This Converter Belongs (and Where It Does Not)

• Golf carts and electric vehicles: Tap into the 36V or 48V battery pack to power USB chargers, GPS trackers, or dashboard cameras without draining the separate 12V accessory battery (if one exists at all).
• Marine and RV DC systems: Boats and RVs with 24V house battery banks can provide USB charging for phones, tablets, and navigation devices directly from the house bank without running through an inverter.
• Solar power installations: Off-grid solar systems with 12V/24V/48V battery banks can provide USB charging for monitoring equipment, Raspberry Pi controllers, or communication devices directly from the DC bus.
• Industrial control cabinets: Many industrial panels have 24V DC control power available. This converter provides USB power for handheld programmer connections, diagnostic tablets, or portable test equipment at the panel without needing an AC outlet nearby.
• NOT for AC mains input: This converter requires DC input. Connecting it directly to 120V or 230V AC will destroy it instantly and may cause a fire. If your power source is AC, you need an AC-DC power supply, not this DC-DC converter.

Key Specifications

The total 5A output is shared across all four USB ports. If one device draws 2A, the remaining three ports share 3A. The per-port current limit — if any — should be verified from the product label or by testing with variable loads. Some multi-port converters implement per-port current limiting; others simply share the total current budget.

Frequently Asked Questions

"Can I wire this directly to my car battery, or does it need to be switched with the ignition?"

You can wire it either way. If wired directly to the battery (unswitched), the USB ports will be powered 24/7. The converter's quiescent current (the power it draws with no USB devices connected) is typically very low — in the range of 5-15 milliamps — which will not meaningfully drain a healthy car battery even over several weeks of the vehicle sitting parked. However, if you want the USB ports to turn off when the vehicle is off, wire the converter's input positive to a switched circuit that is only live with the ignition on. Regardless of which wiring method you choose, install a fuse (5A or 7.5A) on the input positive wire as close to the power source as practical. The fuse protects the wiring, not the converter.

"Do all four USB ports support fast charging, or are some standard-speed?"

Standard USB ports output 5V, and the charging speed is determined by how much current the connected device draws. A device that supports 2.4A charging will charge faster than one limited to 500mA on the same port. For USB "fast charge" protocols like Qualcomm Quick Charge or USB Power Delivery (USB-PD), the charger must communicate with the device and negotiate a higher voltage (9V, 12V, or 20V). This converter outputs a fixed 5V and typically does not implement any fast-charge handshaking protocol — it is a "dumb" 5V power supply. Devices will still charge, but at standard 5V speeds. Check the product's specifications to confirm whether any data-line voltage manipulation (to signal Apple or Samsung charging rates) is implemented on the USB ports.

"How hot will the aluminum case get during continuous use?"

At full 5A output (25 watts total), the buck converter's efficiency is typically in the 85-92% range, meaning about 2-4 watts of heat are dissipated inside the enclosure. The aluminum case will become noticeably warm — perhaps 15-25 degrees C above ambient temperature. At 40 degrees C ambient (a hot engine bay or a sealed outdoor cabinet in summer), the case could reach 60-65 degrees C, which is hot to the touch but within the operating range of the internal components. Mount the converter where air can circulate around the aluminum case — do not wrap it in insulation or bury it in a sealed plastic box with no ventilation. If the case becomes too hot to hold, reduce the load or add active cooling.

koeed.com supplies DC-DC converters, AC-DC power supplies, voltage regulators, and power management modules for vehicle, marine, solar, and industrial applications. For multi-unit orders or custom voltage/output configuration requests, contact Moritta@KOEED.COM.