Close this search box.

product Categories

Simplex dynaMITE Trailer Load Bank (300-400kW)

Outdoor Dynamite 300: $26,695.00
Outdoor Dynamite 400: $29,413.00
Above Prices Include Weather Enclosure
See Below for Trailer Pricing
Please Call for a Detailed Quotation

SKU: dynaMITE-TR Category Brand:
Availability: Please call for current lead time
Shipping: Please Call for a Freight Quote

The Simplex dynaMITE Trailer Load Bank is designed for mobile applications and offers a max capacity up to 400kW. Available with or without a trailer.


  • Load Capacity: Max capacity up to 300 or 400kW at 240 and 480 VAC, 3PH, 60Hz. Capacity derates at other voltages.
  • Duty Cycle: Rated for continuous operation.
  • Digital Load Step Control: Nominal 5kW resolution – direct enter any load value, and controller will apply load within nominal 5kW resolution.
  • Digital Control: PLC based control with 8-inch color TFT touch-screen interface. MODBUS over TCP/IP network communication. Touchscreen easily removable from panel.
  • Instrumentation: Digital power transducer with built-in communication to digital controller. Data display on touch-screen. Data acquisition and recording.
  • Control Power Supply: Dual voltage control power transformer with supply power switchable to internal (load bus) or external source.
  • Cooling System: Forced Air. Vertical airflow and exhaust.
  • Load Elements: Simplex Powr-Web chromium alloy, open wire, continuously supported, power resistor.
  • Load Element Circuit Protection: Branch circuit fuses. One set of fuses each 50KW branch. Fuses are current limiting type, 200KAIC, 600V, enabling safe use on large generating or UPS system.
  • Malfunction Detection System: Protection against fan failure, high exhaust air temperature, high intake air temperature, over-voltage and fan reversal. Exhaust air temperature displays on screen.
  • Load Connections: Cam-type male power connectors. Two cam-connections per phase plus one ground (Dynamite 300). Three cam-connections per phase plus one ground (Dynamite 400).
  • Enclosure: Outdoor weather-resistant enclosure with lifting eyes. Manually-operated exhaust hatch.
  • Network Capable: Any number of dynaMITE and Electra Load Banks can be combined for large system capacities and networked for central control and data acquisition.
  • UL Listed.


  • Our Price: $15,900.00
  • Part Number: OPLB-85
  • Extra-heavy duty steel trailer with steel deck and all welded frame construction.
  • Meets all DOT requirements for highway use. DOT lighting and connector. Rear reflectors.
  • User specified hitch (2 5/16″ ball hitch or 3″ pintle ring hitch adjustable in 2″ increments).
  • Electric driving brakes. Electric break-away battery and switch. Mechanical parking brake.
  • 2000 lb. lift jack.
  • 36″ safety chains with hooks.
dynaMITE Comparison Chart
Model Max Capacity Full Load Amps Cooling System Max Air
Temp Rise
300 kW at 240/480V 3Ph
225 kW at 208/416V 3Ph
188 kW at 380V 3Ph
200 kW at 240V 1Ph
721A at 240V
361A at 480V
8,500 CFM
1.5HP Motor
290 F
400 KW at 240/480V 3Ph
300 KW at 208/416V 3Ph
251 KW at 380V 3Ph
267 KW at 240V 1Ph
961A at 240V
481A at 480V
10,500 CFM
3HP Motor
300 F


dynaMITE Brochure

dynaMITE Drawing

Simplex One-Year Parts Only Warranty


  • Network control cables – Call for Pricing
  • Remote controller cable extensions – Call for Pricing
  • 12 foot power cable set (instead of cam-connections) – Call for Pricing
  • Steadypower 25ft and 50ft Load Bank Cable Sets (see below to order)
  • Steadypower trailers and reels (see below to order)
Load Voltage Rating


Full Load Amps

Digital Load Step Control

Control/Fan Power

Internal Control/Fan Power

External Control/Fan Power

Cooling System

Max Air Temp Rise

Ambient Air Temp

Power Connection

Dimensions HxWxD (inches)

Weight: 300 / 400

Trailer Construction

Trailer Lights

Trailer Brakes

Trailer Suspension

Trailer-Vehicle Connections

Trailer Weight Capacity

Trailer Axles and Tires

Dimensions HxWxD with dynaMITE/Trailer

Weight with dynaMITE/Trailer

Limited Warranty


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.