B&R 3BP151.4
Model Series: 3BP (Power Supply for X20 I/O Systems)
Product Overview:
The 3BP151.4 is a 24 V DC / 120 W switch-mode power supply from B&R’s 3BP product line, specifically designed to power B&R X20 I/O modules and X20 bus components. It features a universal AC input and provides a stable 24 V DC output with comprehensive protection features.
Detailed content
Technical Specifications:
- Output Voltage: 24 V DC (adjustable ±5%)
- Output Current: 5.0 A (continuous)
- Output Power: 120 W (maximum)
- Input Voltage Range: 100 V AC to 240 V AC (single-phase, 50/60 Hz)
- Input Frequency: 50 Hz / 60 Hz (auto-sensing)
- Efficiency: Greater than 88% (at full load)
- Output Ripple: Less than 100 mV peak-to-peak
- Output Noise: Less than 50 mV RMS
- Protection Features: Short-circuit protection, overcurrent protection, overvoltage protection, overtemperature protection
- DC OK Relay: 1 × changeover contact, 250 V AC / 3 A
- Protection Rating: IP20
- Operating Temperature: 0 °C to +50 °C (derating above +40 °C)
- Storage Temperature: -25 °C to +70 °C
- MTBF: Greater than 100,000 hours (at 25 °C)
- Dimensions (W × H × D): Approximately 50 mm × 120 mm × 80 mm
- Weight: Approximately 0.45 kg
- Mounting: DIN rail TS 35
- Safety Certifications: CE, UL, cUL, CCC
Functional Features:
- Universal AC input (100–240 V AC) for global deployment
- DC OK relay for system-level fault monitoring
- LED power status indicator
- High efficiency reduces thermal load in control cabinet
- Conformal coated PCB for enhanced reliability in harsh environments
Applicable Industries:
Industrial automation, machine building, process control, packaging, material handling, OEM equipment.
Installation Requirements:
- Mount on DIN rail TS 35
- AC input: L, N, PE terminals (wire size: 1.5 mm² minimum)
- DC output: +V, -V terminals (wire size: 2.5 mm² minimum for 5 A)
- DC OK relay: wire to PLC input for fault detection
- Maintain 10 mm minimum clearance on all sides for ventilation
Usage Notes:
- Derate output current by 2% per °C above +40 °C ambient
- Always connect protective earth (PE)
- DC OK relay must be monitored by controller for fault response
- Do not block ventilation openings












