Hager ASX420U 20A C Curve 30mA RCBO
Protect a suitable three-phase circuit with the Hager ASX420U 20A C Curve 30mA RCBO, a 10kA electronic RCBO that switches the neutral as well as its three phase poles. The slim three-module format is designed for integration with compatible Hager distribution boards.
C-Curve Operation and 30mA Protection
With a 20A rating and 30mA sensitivity, this version may suit appropriate commercial three-phase final circuits. C-curve magnetic operation is typically within 5–10 × In, or approximately 100–200A at this rating. A 30mA residual-current threshold may be used for additional protection where the circuit design and regulations require it.
Planning the Installation
For motor-related loads, review starting characteristics and the protection needs of connected equipment. This is a C-curve product; substituting D curve changes the instantaneous-trip band and requires design verification.
Technical Specifications – Hager ASX420U 20A C Curve 30mA RCBO
| Manufacturer | Hager |
|---|---|
| Part number | ASX420U |
| Device | Electronic three-phase RCBO with switched neutral |
| Poles | 3P+N; 3 overcurrent-protected phases |
| Rated current | 20A |
| Trip characteristic | C curve |
| Residual-current sensitivity | 30mA |
| 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 ASX425U (25A, 30mA) or ASY416U (C curve, 100mA) for a different rating or sensitivity.
Browse Hager Protection
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.
