Emiter EM-41_DCAC DC/AC Combiner Box (Type 2, 20 A, 1 MPPT)

The Emiter EM-41_DCAC DC/AC combiner box is a ready-to-connect surface-mounted box with an IP65 protection rating, designed for photovoltaic installations. Internal components include Dehn Type 2 surge arresters for DC and AC sides, as well as a Noark 20 A 3-phase miniature circuit breaker with a B tripping characteristic.

The Emiter EM-41_DCAC junction box (PHS 12T enclosure model) is adapted for surface mounting in photovoltaic systems with or without an isolated lightning protection system. The construction with a transparent door features an IK08 impact resistance class and an IP65 ingress protection rating, enabling safe operation in demanding conditions. Inside, a twelve-module system made of halogen-free plastic with Protection Class II is used. The combiner box is factory-assembled and prepared for direct connection to the circuit, with panel-mounted MC4 connectors routed out for a single PV module string.

Key features

• Factory-installed Dehn Type 2 surge arresters for both direct current (DC) and alternating current (AC) sides.
• Built-in Noark 3-phase miniature circuit breaker with a rated current of 20 A and a rated short-circuit capacity of 6 kA.
• Surface-mounted enclosure with an IP65 protection rating, equipped with ready-to-use panel-mounted MC4 connectors.
• Visual operating state and fault indicators (green/red) in the surge arrester modules.

Technical data

Number of supported MPPTs	1
Number of PV strings	1
Number of AC system phases	3
Protection rating	IP65
Mechanical resistance	IK08
Enclosure protection class	II
DC surge arrester	Dehn DG M YPV SCI 1000 (Type 2)
Maximum PV voltage (UCPV)	1000 V
AC surge arrester	Dehn DG M TNS 275 (Type 2)
Miniature circuit breaker	Noark Ex9BN 3P B20 (3-phase, 20 A)
DC connector type	Panel-mounted MC4
Operating temperature range (arresters)	-40 °C ... +80 °C
Net thickness of the box	144 mm