The Hager ADB440U is a combined Residual‑Current Breaker with Overcurrent protection (RCBO) designed to provide comprehensive circuit safety in a compact, single‑module format. It integrates both residual-current (RCD) and overcurrent (MCB) protection to protect electrical circuits against earth leakage, overloads, and short circuits. This variant is configured with a 40 A rated current, a B‑curve tripping characteristic for general use circuits, and 30 mA Type A residual current sensitivity for AC and pulsating DC leakage detection. With a 10 kA short‑circuit breaking capacity, the device delivers dependable protection for higher‑load circuits in domestic, commercial, and light industrial electrical installations. The ADB440U is suitable for DIN rail mounting in distribution boards and consumer units, providing space‑efficient combined overcurrent and leakage protection.
The Hager ADB440U RCBO is suitable for protecting higher‑load circuits in consumer units, distribution boards, and panel systems where combined overcurrent and earth-leakage protection is required. Typical uses include larger lighting groups, dedicated power circuits, workshop feeds, and other applications with elevated current demands.
The ADB440U delivers a reliable, standards‑compliant circuit protection solution that combines residual-current detection and overcurrent interruption in a single, compact device. Its B‑curve tripping and Type A sensitivity provide balanced protection for modern electrical loads, while its 40 A rating and 10 kA breaking capacity safely accommodate higher‑current circuits. The space‑efficient modular format also supports modern distribution board design and simplifies installation for professional trade applications.
| Superlec Code | ADB440U |
| Product Type | RCBO |
| MCB/RCBO Curve | B |
| Amperage | 40A |
| MCB Size | Single Pole(SP) |
