GFS Power

Circuit Breaker Distribution Panels

Circuit breaker distribution panel

DST-10 (UL) and DST-20A (UL)

Two models available:

  • Model DST-10 (UL), 19” Rack mount 2U DC Power Distribution System. The single bus bar provides a maximum rating of 450Amp and accommodates up to 10 plug-in circuit breakers
  • Model DST-20A (UL), 19” Rack mount 2U DC Power Distribution System. The dual isolated A and B bus bars provide a maximum rating of 900Amp when paralleled or 450Amp each when used for redundant power configurations or different voltages/ground references and accommodates up to 20 plug-in circuit breakers (10 per bus bar)
  • Suitable for virtually any 48V, 24V or 12V DC Power Distribution System requirements
  • Each panel offers front access for quick installation of plug-in circuit breakers
  • Model PBA Series circuit breaker ratings used in both DC Power Distribution Systems include 5A, 10A, 15A, 20A, 25A, 30A, 40A, 50A, 75A or 100Amp
  • Model RC-DST rear terminal covers are provided with each panel, as standard

 Optional item:

  • BBA-800 Series – nickel-plated copper bus bar rated at 800Amp for use as heavy duty DC positive or negative connection point in rack installations


Model DST-10 (UL) has a single 450 amp bus which accepts up to 10 breakers.

Model DST-20A (UL) features dual isolated 10 circuit A and B buses, each rated at 450 amps, enabling redundant power configuration or different voltages/ground references. A and B inputs can also be paralleled, creating a single 900 amp bus.

PBA Series plug-in circuit breakers insert securely into sockets recessed in the front access panel. Breaker alarm contacts allow optional remote tripped-breaker alarm/indication. The “mid-trip” function of the circuit breaker provides quick visual identification of a failed circuit and distinguishes between an over-current trip and intentional shut-off. When tripped, the toggle handle moves to a 90° position, halfway between the “on” and manual “off” position. Specify the required amperages when ordering and plug them into the panel during installation.

Input/output wiring is rear access via bus bars that accept single or double hole lugs. Input/output buses are secured to the load breaker sockets via solid nickel-plated copper bus material.

Mounting brackets are provided to adapt the panel for 19”or 23” racks. Snap-in hole plugs are provided for unoccupied breaker positions and a clear protective cover which prevents accidental shut off of the breakers and also provides for convenient placement of circuit identification labels.



Nominal Input/Output:

  • 48VDC
  • 24VDC
  • 12VDC

Total Circuit Capacity:

  • DST-10 (UL): 10 Breakers
  • DST-20A (UL): 20 Breakers

Total Current Capacity:

  • DST-10 (UL): 450 amps (single 450 amp bus)
  • DST-20A (UL): 900 amps (dual isolated 450 amp A & B buses)

Maximum Circuits per Bus: 10


UL Listed: 1801 First Edition: Subject Standard for Power Distribution Center for Telecommunications Equipment

C22.2 No. 225-M90: Canadian Standards for Telecommunication Equipment

CE Marked

Circuit Breakers

UL Recognized

CE Marked

Current Ratings: 5, 10, 15, 20, 30, 40, 50, 75 or 100 amps

Breaker rating stamped beside toggle for easy reference

Voltage Rating: 80VDC maximum

Type: Plug-in with Auxiliary Contacts

Weight: 1 Lb / 0.45kg

Operating Temperature

-40°C to + 70°C, 450 Amps @ +35°C, derate to 400 Amps @ +40°C, 320 Amps @ +50°C, 150 Amps @ +70°C


Bus Bars: Nickel-plated copper; accepts single or double hole lugs

Front Panel: Anodized aluminum Cover, Rear Panel: Vinyl-laminated aluminum

Dimensions: (Both models)

Inches Centimeters
3.5 19/23 11 8.9 48.3/58.4 27.9

Weight (no breakers installed): DST-20A: 12 lbs / 5.45kg., DST-10: 9 lbs / 4.09kg.


Tripped Breaker Contacts via Rear Panel Connector; Normally Open configuration Note: Separate contacts for each bus on model DST-20A

Rear Panel View



Optional Items

Return Bus Bar Assembly

Model: BBA-800800Amp nickel-plated copper bus bar for use as heavy duty DC positive or negative connection point in rack installations. Mounts to rear of rack; adaptable to 19″ or 23″ rack widths.



Rear Terminal Cover Assemblies

Model: RC-DST, covers rear, top and sides of bus bars. (DST panel must be flush mounted to rack face for installation of cover). The Rear Terminal Cover  Assembly is provided with DST  Series Distribution Panels, as standard.


Rear Rack Covers – 3 or 7 RU

Model: RRC, clear plastic panels attach to rear, top and sides of racks to protect service personnel from accidental contact with “live” terminals. Holes in rear panels allow for flow-through ventilation of fan-cooled components. Specify 19″ or 23″, 3 RU or 7 RU height when ordering. (DST Series Distribution Panels may be either centre or flush mount to use cover)



Ordering information:

  • DST-10 (UL)          10 breaker panel with single 450Amp bus
  • DST-20A (UL)        20 breaker panel with dual isolated A & B Buses each 450Amp
  • PBA-5                       5Amp Plug-in Circuit Breaker
  • PBA-10                    10Amp Plug-in Circuit Breaker
  • PBA-15                    15Amp Plug-in Circuit Breaker
  • PBA-20                    20Amp Plug-in Circuit Breaker
  • PBA-25                    25Amp Plug-in Circuit Breaker
  • PBA-30                    30Amp Plug-in Circuit Breaker
  • PBA-40                    40Amp Plug-in Circuit Breaker
  • PBA-50                    50Amp Plug-in Circuit Breaker
  • PBA-75                    75Amp Plug-in Circuit Breaker
  • PBA-100                 100Amp Plug-in Circuit Breaker
  • BBA-800                 800Amp Return Bus Bar Assembly

Optional items:

  • RRC-3-19               3 RU Rear Rack Cover 19″ rack
  • RRC-7-19               7 RU Rear Rack Cover 19″ rack
  • RRC-3-23               3 RU Rear Rack Cover 23″ rack
  • RRC-7-23               7 RU Rear Rack Cover 19″ rack

 Download Data Sheet and Manual (PDF)

Download PDFData Sheet (PDF)



Download PDFManual-DST-UL (PDF)



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