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Compact black or gray aluminium module, epoxy potted, waterproof, 2.5 by 2.1 by .7 inches

KEHIPI

KEHIPI 8V-40V to 12V 3A 36W Buck Boost Transformer

SKU CH-Z71S-9J7NX

Converts 8V-40V input to stable 12V 3A output with 95% efficiency in a compact IP68 waterproof aluminium housing

  • Product type8 V-40 V to 12 V 3A
  • Product colorBlack or gray
  • Product dimensions2.5 in × 2.1 in × 0.7 in
  • Product weight110 g
  • Wide 8V-40V input powers 12V gear from varied sources
  • 95% synchronous rectification efficiency cuts energy loss and heat
  • IP68 aluminium epoxy shell resists water dust shock and vibration
  • Smart chip guards against over-current overload short-circuit and over-heat
  • Operates reliably from -40°C to 80°C in harsh environments

DC buck-boost converter for 8V–40V systems

This module accepts a wide 8V to 40V input range and delivers a regulated 12V output at up to 3A, providing 36W of continuous power. It is designed for vehicles and equipment that run on 12V, 24V or 36V nominal batteries, such as golf carts and club cars. The non-isolated topology keeps the unit compact while maintaining high conversion efficiency. Builders who need an isolated output or a different voltage rail cannot use this device.

Synchronous rectification with IP68 sealing

Synchronous rectification using MOSFETs pushes peak efficiency to 95% and limits output ripple to 50mV, reducing heat during normal operation. The aluminium shell is fully potted with epoxy to achieve an IP68 rating, making the converter waterproof, dust-proof and resistant to mechanical shock. Operating temperature spans -40°C to 80°C, and a 2-second start-up delay prevents inrush issues. No external fan or heatsink is required.

Integrated protection and minimal wiring

A smart protection chip monitors for over-current, over-load, low-load, short-circuit and over-heat conditions, shutting the unit down safely when limits are exceeded. No-load input current stays at or below 10mA, preserving battery charge during standby. The package includes only the sealed converter module; no mounting brackets, cables or configuration software are supplied. Installers must provide their own wiring and fusing.

How it compares

Measured against everything we stock in Voltage Converters & Transformers, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 70% of the 10 comparable items (median $26.99).

Specifications

Product
Brand nameHOMELYLIFE
Model name8-40 V/12 V
Part number8-40 V/12 V
Product type8 V-40 V to 12 V 3A
Product colorBlack or gray
Size & build
Product dimensions2.5 in × 2.1 in × 0.7 in
Product weight110 g

Questions about this item

How do I wire the 8V-40V input and 12V output leads on this buck-boost module?

Connect the input wires to a 12V, 24V or 36V nominal source within the 8V-40V range, observing polarity, then attach the output leads to your 12V load; the unit starts after a 2-second delay.

What long-term upkeep does the aluminium-epoxy sealed converter require?

No scheduled maintenance is needed; the IP68-rated potting protects against dust, moisture and shock, so only inspect wiring connections periodically.

At what point does thermal protection activate during continuous 3A output?

The built-in over-heat protection engages if the internal temperature exceeds the 80°C operating limit, shutting the module down until it cools.

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