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Focus Industries 300 Watt 12-14 Volt Stainless Steel Plug-In Transformer MST-12-300

Units in stock:
Usually ships in 1 week.

Product Description


• UL1838 and UL1598 Listed
• 300 watt output
• 316 Stainless Steel enclosure (Lifetime Warranty)
• Sealed removable, lockable hinged door
• Rain Tight NEMA 3R rated
• LED indicators for instant recognition of 120 volt and 12 volt power
• Photocell Ready with quick connector
• Supplied with conduit knockouts and accessory knockouts
• Bottom panel swings down for easy access wiring
• Mounting plate and hardware supplied for easy installation

Multi-Voltage 12.5v, 13.5v, 14.5v output

• Brushed Stainless Steel

• Long life, high temperature (130°C) Class B rated transformer core
• Copper Shielded Isolation/Insulation type - no contact between 120 volt & 12 volt windings.
• 1500 volt isolation between all windings and ground
• Electrical Grade M19 steel for superior electrical and magnetic properties
• Strip copper secondary windings for lower temperature rise.
• Single phase, open core and coil
• EL laminated windings (linear output) vacuum impregnated with black slate flour
• Filled varnish for superior heat dissipation and noise reduction. Class 180°C
• Resettable magnetic circuit breaker for overload and short circuit protection
• 120 volt primary, 50/60 hertz/cycle standard. Optional 277v primary (300w only)
• Multi-Volt 12.5/13.5/14.5
• 6 foot 18/3 SJT-WA weatherproof grounded power cord with flat angle plug
• On/Off rocker switch


• Limited lifetime warranty on enclosure
• 10 year warranty on mechanical/electrical components
• 3 year warranty on all timers


Height : 16" (406mm)

Width : 6" (152mm)

Depth: 5" (127mm)

Spec Sheet



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