DC Power Systems and Battery Chargers

Delta Eltek Flatpack S 48V 1U DC Power System (2kW - 5kW)

Compact. Scalable. Intelligent. The Flatpack S 48V 1U DC Power System is designed for high-performance power delivery in space constrained environments.

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Features

  • Ultra-Compact & Versatile – With a 262mm system depth, this power system fits conveniently into a variety of cabinets, making it a perfect replacement unit in existing infrastructure.
  • Scalable Power Performance – Supports configurations with up to 3 high-efficiency rectifiers, delivering 48V DC power with up to 100A output.
  • Advanced Control & Monitoring – Integrated Smartpack S controller provides real-time system oversight, remote monitoring via Ethernet, and intelligent power management.
  • Hot-Swappable for Maximum Uptime – Designed for continuous operation, with hot-pluggable rectifiers and controllers, ensuring easy maintenance and expansion without downtime.
  • Flexible Load & Battery Distribution – Multiple load breaker options (up to 80A) and configurable battery distribution, supporting a wide range of telecom and network applications.
  • Smart Lithium-Ion Battery Compatibility – Supports Polarium and Delta lithium-ion batteries as standard, enabling optimised performance, extended battery life, and intelligent power management.
Specifications
MANUFACTURER PART NUMBER
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Manufacturer Part Number CTOS0201.xxx CTOS0301.xxx
Powerbox Part Number PB-CTOS0201-X-XXX PB-CTOS0301-X-XXX
Compatible Delta Eltek Systems  Flatpack S 48/1000HE (241122.105) Flatpack S 48/1000HE (241122.105);
Flatpack S 48/1800HE (241122.125)
INPUT DATA
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Voltage (Vac) 100...250Vac
(See Flatpack S 48/1000HE or Flatpack S 48/1800HE Specifications for detailed specification)
Mains Configuration 230Vac, 1-Phase or 2 x 1-Phase 230Vac, 3 x 1-Phase or 3-Phase (∆)
230/400Vac, 3-Phase (Y)
Connection Via 2.5mm² Terminal Blocks (Rear Connection)
Frequency (Hz) 45 - 66Hz
OUTPUT DATA
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Voltage (Vdc) -48Vdc -48Vdc
Max. Current (A) 40A 100A
BATTERY DISTRIBUTION
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
LVBD Default Default
Breaker (Plug-In Type) Max Size 2 x 40A MCB¹ 2 x 80A MCB¹
Connection 16mm² Terminal Blocks (Rear) M6 Cable Lug (Rear)
Note ¹ If only one string is used, one of the battery breakers can be configured as a load breaker. 
LOAD DISTRIBUTION / CABLE ENTRY
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Connection Rear cable entry, front access connections (7 x 4mm² screw terminals)³ Rear Connection via m6 Cable lug
Total Load Breakers (Plug-in Type) 7 x Load MCB⁴ 1 x 80A MCB
Notes ³ Drawer solution, front access for actual connection, but cables enters from rear 
⁴ MCB Ratings to be defined by customer at time of order. Currently available in 2A, 5A, 10A, 15A, 20A and 30A ratings.  
CONTROL & MONITORING
System Controller
Smart Pack S (242100.410). Includes: 2.2" High Resolution Colour Display; Ethernet enabled for Remote or Local Monitoring and Control via Web Browser; SNMP v3 Protocol; MODBUS TCP; pComm UDP (Power Site); 6 x Programmable Relay Outputs; 6 Programmable Multi-Purpose Inputs (Digital Inputs or Analog Signals); System Logging; Automatic Battery Monitoring & Testing; Battery Quality Indication (based on test results); LVD control.
MECHANICAL
Dimensions [WxHxD]
19"/1U/262mm
Recommended minimum cabinet depth, 300 mm
Weight (including controller & distribution, excluding rectifier modules) 5.3KG 5.2KG
IP Rating IP20
DESIGN STANDARDS
Electrical safety UL 60950-1, EN 60950-1
EMC ETSI EN 300 386 V.1.4.1; EN 61000-6-1 (immunity, light industry); EN 61000-6-2 (immunity, industry); EN 61000-6-3 (emission, light industry); EN 61000-6-4 (emission, industry)
Environment ETSI EN 300 019-2-1 Class 1.2; ETSI EN 300 019-2-2 Class 2.3; ETSI EN 300 019-2-3 Class 3.2
Downloads
Datasheet_PB_Eltek_Flatpack_S_48V_1U_Compact_HE_Power_System.pdf
Datasheet_Eltek_Flatpack_S_48V_1U_Compact_HE_Power_System.pdf
MANUFACTURER PART NUMBER
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Manufacturer Part Number CTOS0201.xxx CTOS0301.xxx
Powerbox Part Number PB-CTOS0201-X-XXX PB-CTOS0301-X-XXX
Compatible Delta Eltek Systems  Flatpack S 48/1000HE (241122.105) Flatpack S 48/1000HE (241122.105);
Flatpack S 48/1800HE (241122.125)
INPUT DATA
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Voltage (Vac) 100...250Vac
(See Flatpack S 48/1000HE or Flatpack S 48/1800HE Specifications for detailed specification)
Mains Configuration 230Vac, 1-Phase or 2 x 1-Phase 230Vac, 3 x 1-Phase or 3-Phase (∆)
230/400Vac, 3-Phase (Y)
Connection Via 2.5mm² Terminal Blocks (Rear Connection)
Frequency (Hz) 45 - 66Hz
OUTPUT DATA
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Voltage (Vdc) -48Vdc -48Vdc
Max. Current (A) 40A 100A
BATTERY DISTRIBUTION
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
LVBD Default Default
Breaker (Plug-In Type) Max Size 2 x 40A MCB¹ 2 x 80A MCB¹
Connection 16mm² Terminal Blocks (Rear) M6 Cable Lug (Rear)
Note ¹ If only one string is used, one of the battery breakers can be configured as a load breaker. 
LOAD DISTRIBUTION / CABLE ENTRY
Model Flatpack S 1U System - 2 x Rectifier Slots  Flatpack S 1U System - 3 x Rectifier Slots
Connection Rear cable entry, front access connections (7 x 4mm² screw terminals)³ Rear Connection via m6 Cable lug
Total Load Breakers (Plug-in Type) 7 x Load MCB⁴ 1 x 80A MCB
Notes ³ Drawer solution, front access for actual connection, but cables enters from rear 
⁴ MCB Ratings to be defined by customer at time of order. Currently available in 2A, 5A, 10A, 15A, 20A and 30A ratings.  
CONTROL & MONITORING
System Controller
Smart Pack S (242100.410). Includes: 2.2" High Resolution Colour Display; Ethernet enabled for Remote or Local Monitoring and Control via Web Browser; SNMP v3 Protocol; MODBUS TCP; pComm UDP (Power Site); 6 x Programmable Relay Outputs; 6 Programmable Multi-Purpose Inputs (Digital Inputs or Analog Signals); System Logging; Automatic Battery Monitoring & Testing; Battery Quality Indication (based on test results); LVD control.
MECHANICAL
Dimensions [WxHxD]
19"/1U/262mm
Recommended minimum cabinet depth, 300 mm
Weight (including controller & distribution, excluding rectifier modules) 5.3KG 5.2KG
IP Rating IP20
DESIGN STANDARDS
Electrical safety UL 60950-1, EN 60950-1
EMC ETSI EN 300 386 V.1.4.1; EN 61000-6-1 (immunity, light industry); EN 61000-6-2 (immunity, industry); EN 61000-6-3 (emission, light industry); EN 61000-6-4 (emission, industry)
Environment ETSI EN 300 019-2-1 Class 1.2; ETSI EN 300 019-2-2 Class 2.3; ETSI EN 300 019-2-3 Class 3.2
Datasheet_PB_Eltek_Flatpack_S_48V_1U_Compact_HE_Power_System.pdf
Datasheet_Eltek_Flatpack_S_48V_1U_Compact_HE_Power_System.pdf

Find the Right Model

Model Number Input Voltage (Vac) Output Voltage (Vdc) Max. Output Power (W / kW)
product variant PB-CTOS0201-X-XXX 100 - 250Vac -48Vdc)
product variant PB-CTOS0301-X-XXX 100-250Vac -48Vdc

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