OSR7-40 RCBO | Electronic Type A/AC Circuit Breaker (6-40A) | 6kA/10kA Protection
Advanced Dual Protection for Electrical Safety
The OSR7-40 RCBO combines residual current (RCD) and overcurrent (MCB) protection in one compact device, ensuring complete safety against:
- Earth leakage faults (30mA/100mA/300mA sensitivity)
- Circuit overloads & short circuits (B/C tripping curves)
- DC current risks (Type A version for EV/solar applications)
Key Benefits for Installers & Homeowners
✔ Full Neutral+Phase Disconnection – Works even if wiring is reversed
✔ Electronic Filtering – Prevents false tripping from voltage spikes
✔ Type A & AC Options – Type A detects pulsating DC (essential for EV chargers)
✔ Wide Current Range – 6A to 40A (residential/commercial use)
✔ 6kA Breaking Capacity – Upgradeable to 10kA for high-demand systems
✔ Test Button Included – Easy safety verification
Technical Specifications
| Feature | Specification |
|---|---|
| Type | Electronic RCBO |
| Protection | Earth leakage + Overload/Short-circuit |
| Rated Current | 6A, 10A, 16A, 20A, 25A, 32A, 40A |
| Voltage | 110V (low voltage) / 230V-240V |
| Sensitivity | 30mA (personal), 100mA/300mA (fire protection) |
| Tripping Curve | B Curve (3-5x In) / C Curve (5-10x In) |
| Breaking Capacity | 6kA (10kA upgrade available) |
| Disconnection | Double-pole (L+N) |
| Standards | IEC 61009-1, EN 61009-1 |
Why Choose OSR7-40?
🏠 For Homes
- Prevents electric shocks (30mA sensitivity)
- Stops electrical fires from faulty wiring
🔌 For EV Chargers & Solar
- Type A version detects DC leakage currents
- Complies with EV installation regulations
🏢 For Commercial Use
- C Curve handles motor/compressor startups
- 100mA/300mA options reduce fire risks
Product Description：
OSR7-40 RCBO | Electromagnetic Type A/AC Circuit Breaker (6-40A) | 6kA/10kA Protection
Complete Electrical Protection for Modern Installations
The OSR7-40 electromagnetic RCBO delivers dual safety by combining earth leakage protection (RCD) and overcurrent protection (MCB) in one compact device. Ideal for residential, commercial, and industrial applications where reliable circuit protection is critical.
Key Safety Features
✔ Double-Pole Disconnection – Simultaneously cuts both Live & Neutral
✔ Type A Detection – Catches pulsating DC faults (essential for EV chargers)
✔ 6kA Breaking Capacity – Upgradeable to 10kA for demanding installations
✔ B/C Tripping Curves – B Curve (3-5x In) for homes | C Curve (5-10x In) for industry
✔ 30mA/100mA/300mA Sensitivity – Personal shock vs. fire protection
Why Professionals Choose OSR7-40?
✅ Neutral Switching – Faster installation/testing
✅ Insulated Openings – Safer busbar connections
✅ Universal Compatibility – Works with all standard screwdrivers
✅ Visual Indicators – Clear ON/OFF status (Red/Green)
✅ Flexible Wiring – Top or bottom cable entry
Ideal Applications
- EV Charging Stations (Type A version)
- Solar PV Systems
- Home Consumer Units
- Commercial Distribution Boards
- Industrial Control Panels
Upgrade your electrical protection today with OSR7-40 – the smarter choice for safety-conscious installations!
Technical Specifications
| Category | Parameter | Specification |
|---|---|---|
| Certification | Standards Compliance | IEC 61009-1, EN 61009-1 |
| Electrical | Rated Current (In) | 6,10,16,20,25,32,40,50,63,80A |
| Device Type | Electronic | |
| Detection Type | Type A (AC+DC) / Type AC | |
| Poles | 2 Pole (1P+N) | |
| Rated Voltage (Ue) | 230/240V | |
| Sensitivity (IΔn) | 30mA,100mA,300mA | |
| Insulation Voltage (Ui) | 500V | |
| Frequency | 50/60Hz | |
| Breaking Capacity | 6kA | |
| Impulse Withstand Voltage | 6kV (1.2/50μs) | |
| Pollution Degree | 2 | |
| Tripping Characteristic | B, C Curve | |
| Mechanical | Electrical Life | 2,000 operations |
| Mechanical Life | 10,000 operations | |
| Contact Indicator | Yes (Visual ON/OFF) | |
| Protection Degree | IP20 | |
| Reference Temperature | 30°C | |
| Operating Temperature | -5°C to +40°C | |
| Storage Temperature | -25°C to +70°C | |
| Installation | Terminal Type | Cable/U-type/Pin-type busbar |
| Cable Size (Top/Bottom) | 25mm² / 18-3 AWG | |
| Busbar Size (Top/Bottom) | 10mm² / 18-8 AWG | |
| Tightening Torque | 2.5N·m (22 In-lbs) | |
| Mounting | 35mm DIN Rail (EN 60715) | |
| Connection Direction | Top or Bottom |
Dimensions
Dimensions
What is an RCBO and How Does it Work?
RCBO stands for ‘Residual Current Breaker with Over-Current’. As the name suggests it protects against two types of fault and in essence combines the functionality of an MCB and RCD.
Let us first remind ourselves of those two faults:
1.Residual Current, or Earth Leakage – Occurs when there is an accidental break in a circuit through poor electrical wiring or DIY accidents such as drilling through a cable when mounting a picture hook or cutting through a cable with the lawn mower. In this instance the electricity must go somewhere and choosing the easiest route travels through the lawnmower or drill to the human causing electric shock.
2.Over-Current takes two forms:
2.1 Overload – Occurs when too many devices are in use on the circuit, drawing an amount of power which exceeds the capacity of the cable.
2.2 Short Circuit – Occurs when there is a direct connection between the live and neutral conductors. Without the resistance provided by the normal circuit integrity, electrical current rushes around the circuit in a loop and multiplies the amperage by many thousand times in just milliseconds and is considerably more dangerous than Overload.
Whereas an RCD is designed solely to protect against earth leakage and an MCB protects only against over-current, an RCBO protects against both types of fault.
