• Kit Fotovoltaico SMA 4,72 kWp – Inverter di Stringa 3,68 kW Monofase
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AC Combiner Box 20A Single-Phase with Type 2 SPD and 300mA Type A RCCB

AC Combiner Box 20A Single-Phase with Type 2 SPD and 300mA Type A RCCB

€138.16
€138.16
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  • Italy22% €168.55
  • Germany19% €164.41
  • France20% €165.79
  • Austria20% €165.79
  • Belgium21% €167.17
  • Bulgaria20% €165.79
  • Croatia25% €172.70
  • Cyprus19% €164.41
  • Czech Republic21% €167.17
  • Denmark25% €172.70
  • Estonia24% €171.31
  • Finland25.5% €173.39
  • Greece24% €171.31
  • Hungary27% €175.46
  • Ireland23% €169.93
  • Latvia21% €167.17
  • Lithuania21% €167.17
  • Luxembourg17% €161.64
  • Malta18% €163.02
  • Netherlands21% €167.17
  • Poland23% €169.93
  • Portugal23% €169.93
  • Romania21% €167.17
  • Slovakia23% €169.93
  • Slovenia22% €168.55
  • Spain21% €167.17
  • Sweden25% €172.70

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AC Combiner Box 20A Single-Phase with Type 2 SPD and 300mA Type A RCCB

Alternating current combiner box for single-phase photovoltaic systems, to be installed on the AC side between the inverter output and the distribution board. Compared with the basic version it adds residual current protection, required when the inverter connection line must also be protected against earth fault currents.

Inside there are a 20A miniature circuit breaker against overloads and short circuits, a Type 2 surge protective device (class II) against transient surges and a 300mA Type A residual current circuit breaker. The 300mA sensitivity is typical of protection against fire risks caused by earth leakage currents, while Type A guarantees tripping even in the presence of alternating and pulsating unidirectional fault currents, such as those that may occur downstream of electronic equipment like inverters.

Key features

Triple protection20A circuit breaker, 300mA residual current device and Type 2 surge arrester in a single pre-wired enclosure.
Type A RCCBIt detects alternating and pulsating unidirectional earth fault currents, suited to the presence of power electronics.
300mA sensitivityA setting typical of protection against fire risks from leakage currents, not against direct contact.
Type 2 surge arresterIt limits transient surges of indirect atmospheric and switching origin coming from the grid.
For single-phase inverters20A on a 230V grid: a size suited to inverters with an indicative power output of up to about 4.6kW.
Compact and ready to use202 × 201 × 120 mm for 1.3 kg: wall installation next to the inverter with just two line connections.

Technical specifications

FeatureValue
Switchboard typeAC combiner box for photovoltaic systems with residual current protection
System sideAlternating current (AC), between the inverter and the distribution board
Number of poles / phasesSingle-phase (L + N)
Nominal current20A
Indicative inverter powerUp to approx. 4.6kW (230V, 20A)
Surge protective device (type)Type 2 SPD (class II)
Miniature circuit breaker (MCB)Yes, 20A
Residual current device (RCD)Yes, 300mA Type A
Dedicated isolator switchNot present: isolation is provided by the miniature circuit breaker
Dimensions202 × 201 × 120 mm
Weight1.3 kg
Reference standards of the componentsEN 61643-11 (surge protective devices), EN 60898-1 (miniature circuit breakers), EN 61008-1 / EN 61009-1 (residual current devices)

Installation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.