Why Choose the ABB EH04-20N Auxiliary Contact Block?
The ABB EH04-20N is a compact 2NO auxiliary contact block designed to extend the signalling and control capabilities of compatible ABB ESB..N installation contactors and EN..N installation relays. As part of the ABB EH04..N accessory range, it provides two additional normally open contacts for status indication, interlocking, feedback and control circuit functions.
This auxiliary contact block features two normally open contacts and no normally closed contacts, providing additional switching functions without using the main power contacts of the associated device. Its tool-free clip-on design allows straightforward side mounting on compatible ABB installation contactors and relays, helping simplify panel assembly and system expansion.
The EH04-20N has a conventional free-air thermal current of 6 A and supports AC-15 and DC-13 control applications. With screw terminals, an IP20 protection rating and a compact 9 mm width, it is well suited to electrical distribution, building automation and industrial control panels where space-efficient auxiliary switching is required.
Key Advantages
- 2NO auxiliary contact configuration for additional signalling and control functions.
- Compatible with a wide range of ABB ESB..N contactors and EN..N installation relays.
- Tool-free clip-on assembly simplifies installation and maintenance.
- Compact 9 mm wide side-mounted design minimises additional panel space.
- 6 A conventional free-air thermal current for auxiliary circuits.
- Screw terminals provide secure and straightforward electrical connections.
Key Features
- ABB EH04..N auxiliary contact block series.
- 2NO / 0NC auxiliary contact configuration.
- 6 A conventional free-air thermal current.
- 3 A AC-15 rated operational current at 415 V AC.
- 0.55 A DC-13 rated operational current at 125 V DC.
- 500 V rated insulation voltage.
- Tool-free side mounting on compatible ABB devices.
- IP20 enclosure protection with screw-terminal connections.
Reliable Auxiliary Control and Signalling
Auxiliary contact blocks such as the ABB EH04-20N provide additional low-power contacts that operate with the associated contactor or relay. These contacts can be incorporated into control circuits for equipment status indication, electrical interlocking, feedback and sequencing without using the main load-switching contacts.
The EH04..N range is designed for straightforward integration with ABB installation contactors and installation relays. Its tool-free side mounting allows the accessory to be attached quickly, while the two normally open contacts provide additional switching points for flexible electrical control system design.
Typical Applications
- Contactor and relay status indication circuits.
- Electrical interlocking and control circuits.
- Building automation and lighting control systems.
- Heating and automatic load-control installations.
- Electrical distribution and control panels.
- Industrial automation, feedback and sequencing circuits.
