JHF812B - Uncategorized HAGER - Free user manual and instructions
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| Product Type | Residual Current Circuit Breaker (RCCB) |
| Number of Poles | 2 |
| Rated Current | 40 A |
| Rated Residual Current | 30 mA |
| Rated Voltage | 230/400 V AC |
| Breaking Capacity | 10 kA (IEC 61009) |
| Mounting Type | DIN rail (35 mm) |
| Width (Module Spaces) | 2 modules (36 mm) |
| Dimensions (H x W x D) | 85 x 36 x 70 mm |
| Weight | 0.2 kg |
| Terminal Connection Capacity | 1 to 25 mm² (solid/stranded) |
| Protection Degree | IP20 (front), IP20 (terminals) |
| Operating Temperature | -25 °C to +60 °C |
| Standards | IEC 61009-1, EN 61009-1 |
| Indication | Red/green toggle position indicator |
| Test Button | Monthly test required (per IEC 60364) |
| Material | Thermoplastic, self-extinguishing (UL94 V-0) |
| Energy Limitation Class | 3 |
Frequently Asked Questions - JHF812B HAGER
How do I properly install the Hager JHF812B RCCB?
Ensure the device is mounted on a 35 mm DIN rail. Connect the phase (L) and neutral (N) to the top terminals (line side) and load to the bottom. Torque terminals to 3.5 Nm (recommended) using a screwdriver. After installation, press the test button to verify operation.
What does the red/green indicator on the JHF812B mean?
The toggle position indicates the status: green (ON) means contacts are closed and current flows; red (OFF/TRIPPED) means the device has tripped due to residual current or a fault.
Why does my RCCB trip frequently?
Frequent tripping may indicate a real earth fault in the circuit, such as a leak from an appliance or damaged wiring. Check all connected equipment. It could also be caused by high inrush currents (e.g., motors, LED drivers) - try using a time-delay (S-type) RCCB if appropriate.
How often should I test the JHF812B?
IEC 60364 recommends testing your RCCB monthly by pressing the test button. The device should trip immediately. If it does not, contact a qualified electrician.
Can the JHF812B be used in a three-phase system?
Yes, the JHF812B is a 2-pole RCCB suitable for single-phase (230 V) or three-phase (400 V) applications when used in a three-phase four-wire system with a separate neutral. For three-phase protection, use four-pole (4P) devices.
What is the maximum cable size that fits into the terminals?
The terminals accept solid or stranded copper conductors from 1 mm² to 25 mm². Use the correct stripping length (approx. 14 mm) and tighten to the specified torque (3.5 Nm).
Is the JHF812B suitable for outdoor installation?
The device has IP20 protection (fingers) but is not waterproof. It should be installed inside a distribution board with proper weather protection (IP54 or higher) if used outdoors.
How can I reset the RCCB after it has tripped?
First, identify and rectify the cause of the trip. Then, move the toggle switch from red (OFF/TRIPPED) to green (ON). If it trips again immediately, do not force it; call an electrician.
Does the JHF812B provide overcurrent protection?
No, the JHF812B is a pure RCCB (residual current only). For overcurrent protection (short circuit / overload), you must pair it with an MCB or use an RCBO (combined device).
What is the operating temperature range of this device?
The JHF812B can operate in ambient temperatures from -25°C to +60°C. Ensure the distribution board has adequate ventilation to avoid exceeding this range.
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