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Black aluminium box with dual cooling fans, 0.63 kg

XMSJSIY 24V to 12V 100A 1200W Step-Down Converter

SKU CH-XRM6-1CTHD

Converts 20-30V input to stable 12V output at up to 100A and 1200W with dual-fan cooling and six protection features

  • ColorBlack
  • Weight0.63 kilograms
  • Converts 20-30 V input to stable 12 V output
  • Delivers up to 100 A continuous current for 1200 W loads
  • Dual intelligent fans activate at 55-70 °C for active cooling
  • Six protection circuits guard against overload, over-temperature, high/low voltage, reverse polarity and short circuits
  • Compact aluminium-alloy housing weighs .63 kg and fits tight vehicle spaces

24V-to-12V 1200W automotive converter

The XMSJSIY buck module steps a 20–30 V DC source down to a regulated 12 V (±0.5 V) rail. It delivers up to 100 A continuous current for a total of 1200 W output. The aluminium-alloy enclosure weighs 0.63 kg and fits in tight vehicle compartments. It targets installers who need reliable 12 V power for fridges, audio gear, monitors or industrial kit running from a 24 V vehicle system.

Active dual-fan cooling with thermal protection

Intelligent dual fans start automatically when internal temperature reaches the 55–70 °C protection window and shut off once the unit cools. The iron shell and side vents provide all-round airflow so heat does not accumulate during extended loads. No-load draw is only 0.10 A and conversion efficiency exceeds 90 %. The converter is rated for 0–40 °C ambient operation.

Six integrated protection circuits

Overload, overtemperature, over-voltage, under-voltage, reverse-polarity and short-circuit safeguards are built in, using relays and a fuse for hard disconnects. The bundle contains only the converter itself; no extra cables, mounting brackets or configuration software are supplied. Buyers who need pre-wired harnesses, remote on/off control or parallel-operation capability must source those separately.

Highlights

  • Converts 20-30 V input to stable 12 V output
  • Delivers up to 100 A continuous current for 1200 W loads
  • Dual intelligent fans activate at 55-70 °C for active cooling
  • Six protection circuits guard against overload, over-temperature, high/low voltage, reverse polarity and short circuits
  • Compact aluminium-alloy housing weighs .63 kg and fits tight vehicle spaces

Specifications

BrandXMSJSIY
ModelXMSJSIY-24V-12V-100A-1200W
Part NumberXMSJSIY-24V-12V-100A-1200W
ColorBlack
Weight0.63 kilograms

Questions about this item

How do I wire the XMSJSIY 24V to 12V converter and what is the common mistake?

Connect the 20-30V source to the input terminals and the 12V load to the output terminals, observing polarity; the step most people miss is adding an inline fuse on the input side as the unit relies on its internal fuse for reverse protection.

What maintenance will the converter need over time?

The dual intake fans draw air through both side vents, so dust builds up inside the aluminium-alloy housing; clean the vents and fan blades periodically to keep the overtemperature protection from triggering at 55-70?.

What is the first limit reached during continuous high-load use?

At sustained loads near 100A the internal temperature rises until the overtemperature protection activates at 55-70?, causing the intelligent fans to run constantly and the output to shut down until the unit cools.

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