Hager ASY440U 40A C Curve 100mA RCBO
For an installation calling for a 100mA Type A RCBO, the Hager ASY440U 40A C Curve 100mA RCBO provides a 10kA short-circuit breaking rating and C-curve response. Confirm coordination with upstream and downstream protective devices.
Where 100mA Sensitivity Is Specified
The 100mA rating is not interchangeable with 30mA additional protection requirements. Allow for temperature derating and the manufacturer’s installation instructions when selecting the final device.
Current Rating and Trip Response
The 40A overcurrent setting and 100mA residual-current threshold must be checked against circuit design. 100mA residual-current sensitivity is different from the 30mA additional protection required for certain installations. This is a C-curve product; substituting D curve changes the instantaneous-trip band and requires design verification.
Technical Specifications – Hager ASY440U 40A C Curve 100mA RCBO
| Manufacturer | Hager |
|---|---|
| Part number | ASY440U |
| Device | Electronic three-phase RCBO with switched neutral |
| Poles | 3P+N; 3 overcurrent-protected phases |
| Rated current | 40A |
| Trip characteristic | C curve |
| Residual-current sensitivity | 100mA |
| Residual-current class | Type A |
| Rated breaking capacity | 10kA |
| Module width | 3 modules |
| Mounting | DIN rail; compatible Hager Invicta distribution arrangement (verify board model) |
Understanding B, C and D Trip Curves
B curve: typically 3–5 times rated current for instantaneous magnetic tripping, used for suitable low-inrush circuits. C curve: typically 5–10 times rated current, commonly specified for moderate inrush. D curve: typically 10–20 times rated current, considered for high-inrush loads such as some motors or transformers. Selected model: C curve. These bands describe magnetic tripping, not permissible continuous loading; the installed fault level and disconnection requirements must be verified.
The specific three-phase Hager range in this listing contains C- and D-curve models; no B-curve SKUs are included here.
Related Hager Three-Phase RCBOs
Compare ASY450U (50A, 100mA) or ASZ432U (C curve, 300mA) for a different rating or sensitivity.
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Explore the Hager 3 phase RCBO range, Hager three-phase distribution boards and Hager shop.
Install and test in accordance with the Hager instructions and applicable wiring regulations. Verify the product-specific datasheet and board compatibility before ordering.
