Shourt Line by Soft Works Ltd.
Model Railroad Products

SL-PS300-1-27F New 24 Volt Pure DC, 12.5 Amp, 300 Watt Output Power

DC Regulated Switching Power Supply for Any Scale Trains - Analog DC or MTS DCC use.

Price: $99.95 New Out of stock
(Click here to confirm the price at US distributors web site - see the 10th item from the top of the page)


The SL-PS300-1-27F regulated switching power supply outputs 24 volts at 12.5 amps. This supply matches the Digitrax DCS-200 8 amp & the Massoth 1203B 12 amp booster/central stations as well as our analog throttle SL-TLC12F (Click here to view) for DC operation

  • Universal AC input / full range with PFC (Power Factor Correction)
  • Forced air cooling by built-in DC fan
  • Cooling fan ON/OFF auto control
  • Over load, over voltage, over temperature & short circuit protection
  • 100% full load burn-in test
  • 1 year warranty

PFC enabled efficiency: Click here to learn why PFC saves you $$$

Mfg: Made in the Taiwan by Mean Well Click here to view the specification sheet and drawings

Input Voltage: 88 to 264VAC 47 to 63Hz (auto sensing)

Input Current: 12.5 Amps(120VAC) 4 Amps @ 120VAC, 2 Amps @ 230VAC

Output Voltage: 24Volts (Front panel adjustable from 18.4 to 27.4 VDC

Output Current: 12.5 ADC (DC Amps) at 230VAC

Output Current: 300VA (300 watts) at 230VAC

Output Ripple: 150 mv (millivolt) Max. / 2 mv Typical

Dimensions: 215 x 115 x 50 mm

Weight: 2.6 pounds


  • Enclosed regulated switching supply.
  • Over Voltage protected
  • Current protected
  • LED output indicator
  • Terminal strip In/Out
  • PFC - Energy Efficient Switching Supply

M.T.F.B.: > 168K hours ( according to MIL-HDBK-217F at 25°C environment)

Safety approvals: UL, c-UL, TÜV, CB, CE.

Mounting: Bottom; 4 ea. 4-M4 L=5mm & 4ea. 5-m3 L=3mm brass threaded mounted holes. Side; 4 ea. 4-M4 L=6mm brass threaded mounted holes..

Cables: not included. (All cables are included in the SL-PS300-1-27&TLC1cv SET (click her to view)

Easily change the output voltage from the front panel

  • Factory Set at 24 Volts

Boost the voltage to compensate for line voltage drops.

  • 27.2 Volts Maximum

Lower the voltage to match your engines voltage requirements.

  • 17.8 Volts Minimum

Protect your train's smoke stack heating element, lighting and electronics by setting the voltage of your choice.

Optional AC Cable:
SL-AC-10SW A10' AC Cord & Switch: sold out
  • UL listed
  • 10 feet long
  • 3 wire cable
  • Molded three prong AC plug
  • ON/OFF switch located 1 foot from the end of the cable.
  • Rated 300 Volts,
  • 105 deg. C,
  • 18 AWG with a center green ground wire.

The cable is easily attached to the power supply
using only a screw driver.

The ON/OFF switch makes controlling power
to the supply very easy.

Optional power 10' power cord with switch
SL-PS300-1-27 with power cord attached

To Run Trains on DC power:
  1. Attach an AC grounded power cord to the power supply.
  2. Attach 18 gauge wires between the supply and 1 or 2 SL-TLC1cv DC throttle.
  3. Attach wires between the SL-TLC1cv and your track.

This combination provides 200VA of power and 24VDC PURE LINEAR POWER at 6 Amps continuous/12.5 amps peak. Maximum power supply output voltage can be adjusted from 17.8 to 27.2 Volts DC by turning the adjustment control on the supply front Panel. (See photo below)

The power supply is perfect for use with our TLC1 Throttle shown above with track clips in our SL-PS300-1-27F&TLC12F SET (click her to view). The +V Adj. control on the font panel makes this the perfect 12.5 amp 17.8 to 27.2 Volt DC Power supply for DC or DCC (MTS) power.
The power supply power two or three TLC8F Throttles shown above with the use of circut breakers on each throttle. The SL-PS300-1-27F SET (click her to view). kit includes all the items shown above, just add wire and track clips and your ready to run.

To Run Trains on MTS/DDC power::

Attach an AC grounded power cord to the power supply.

  1. Attach two wires between the supply and your DCC central station or booster (Digitrax DCS 200 shown).
  2. Attach wires between the DCC central station or booster and your track.
  3. Plug in the power supply

The SL-PS300-1-27 power supply is a perfect match to the Massoth 1203 B 12 amp booster to provide 12 amps of continuous DCC power. The supply may also be used with other manufactures DCC central stations and boosters.

SL-PS300-1-27 12 Amp Power Supply
Massoth 1203 B 12 Amp Booster
= 12 amps of pure MTS/DCC power

For all NMRA DCC AND LGB type I, II and III products

The Massoth 1203B 12 amp booster and the SL-PS300-1-27 power supply is a perfect match for MTS/DCC use. The Massoth 1203 B is a new product and available at the Shourt Line in June 2007. The 1203 B has three power units that can be used individually or together to supply 4, 8 or 12 amps of MTS/DCC power. Each of the three units has electronics for automatic loop control without additional hardware. The 1203B output voltage is adjustable from 14 to 22 volts making it applicable for all gauges. Use of NMRA standardized CDE connectors to connect the booster with the central station of your choice.

Massoth is the maker of all LGB electronics and Massoth is the only manufacture that makes DCC/MTS products that meet BOTH NMRA DCC standards AND LGB type I, II and III MTS standards. This means this is the only product line guaranteed to operate ALL your old and new LGB locomotives with type I, II and III decoders as well as all NMRA standard DCC products.

A perfect match; SL-PS300-1-27F (12.5A) + Massoth 800Z central station, Navigator and receiver for ultimate wireless MTS/DCC Train Control.
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