Phoenix Contact CBM E8 24DC/0.5-10A NO-R Circuit Breaker (2905744)

The Phoenix Contact CBM E8 24DC/0.5-10A NO-R is a compact multi-channel electronic circuit breaker with active current limitation, designed for protecting up to eight 24 V DC loads from overloads and short circuits. With adjustable channel currents from 0.5 to 10 A, integrated fail-safe elements, and DIN rail mounting, it is the ideal solution for reliable load protection in industrial automation and control systems.

This smart breaker features nominal current assistant, electronic locking, and status LEDs per channel for intuitive diagnostics. Built-in remote signaling, voltage monitoring, and programming mode support deliver maximum control and safety for machine builders and system integrators.

Technical Specifications

Model: CBM E8 24DC/0.5-10A NO-R
Part Number: Phoenix Contact 2905744
Product Type: Electronic Circuit Breaker
Series: CBM
Number of Channels: 8
Rated Voltage: 24 V DC
Input Voltage Range: 18–30 V DC
Output Current (Per Channel): 0.5 / 1 / 2 / 4 / 6 / 10 A (adjustable)
Total Rated Current (Max): 80 A (with dual 6 mm² IN+)
Output Characteristic: Electronic current limiting
Short-Circuit Switching Capacity: 300 A
Shutdown Time: 0.02 s (> 1.3 × IN)
Switch-On Delay: 0.1 s per channel
Efficiency: > 99%
Power Dissipation:

• 1.2 W (No-load)
• 17.2 W (Nominal operation)
  MTBF (IEC 61709):
• 1,304,293 h @ 25°C
• 858,501 h @ 40°C
• 440,048 h @ 60°C

Electrical Characteristics

• Active Current Limiting:
  • 2.0 × IN (0.5–1 A)
  • 1.5 × IN (2–10 A)
• Feedback Voltage Resistance: ≤ 35 V DC
• Undervoltage Cutoff: ≤ 17.8 V DC
• Overvoltage Cutoff: ≥ 30.5 V DC
• Max Capacitive Load: 75,000 μF
• Reset Input Voltage Range: 7–30 V DC
• Reset Trigger: Falling edge, min. 50 ms pulse
• Channel Re-enable Delay (After Trip): 10 s

Signaling & Indicators

LED Indicators (per channel):

• Green: Normal operation
• Yellow: Load > 80%
• Red: Overload/short-circuit or voltage fault
• Flashing States: Programming, reset, or tripping status

DC OK LED:

• Green: Voltage in range
• Yellow: Undervoltage
• Red: Overvoltage

Remote Signaling:

• N/O Contact: 0–30 V DC
• Switching Current: 1–100 mA DC
• Status Output Voltage: 24 V DC (max. 20 mA)

Mechanical & Connection Data

Mounting Type: DIN rail, 7.5 mm
Housing Material: PC, PA 6.6, PBT-FR17, POM
Protection Class: III
Pollution Degree: 2
Degree of Protection: IP20
Color: Light gray (RAL 7035), gray (RAL 7042)
Dimensions (W × H × D): 41 × 130 × 121 mm
Weight: ~380 g

Connection Method: Push-in terminals

• Main IN+: 0.75–16 mm² (AWG 20–4)
• IN- / OUT / Signaling: 0.2–2.5 mm² (AWG 24–12)
• Stripping Length: 10–18 mm
• Tightening Torque: ~0.5–0.6 Nm

Environmental Conditions

• Operating Temp: -25°C to +70°C (startup at -40°C)
• UL Temp Limit: Up to 65°C
• Storage Temp: -40°C to +80°C
• Altitude: ≤ 6000 m
• Humidity: 95% RH, 240 h
• Shock (IEC 60068-2-27): 30g / 18 ms
• Vibration (IEC 60068-2-6):
  • 5–24.9 Hz: ±1.6 mm
  • 24.9–150 Hz: 4g

Applications

Ideal For:

• PLC, HMI, and I/O protection in 24 V DC systems
• Panel builders needing channel-level current customization
• Machine automation requiring remote reset and signaling
• Multi-channel device protection in field or control cabinets

Key Features & Benefits

✅ 8 Individually Configurable Channels: Adjustable from 0.5–10 A.

✅ Active Current Limiting: Prevents shutdowns during inrush events.

✅ Remote Reset & Signaling: Control and monitor remotely.

✅ LED Diagnostics: Fast channel-specific fault visibility.

✅ Ultra-Reliable Performance: >99% efficiency and high MTBF.

📦 Available Now from Drive Outlet Megastore

The Phoenix Contact CBM E8 24DC/0.5-10A NO-R is in stock now at Drive Outlet Megastore, providing modular protection with customizable channel current ratings.

Need assistance with circuit configuration or panel integration? Contact our automation experts today.

Advanced protection – by Phoenix Contact, delivered by Drive Outlet Megastore.