ABB EH04-20N is a compact 2NO auxiliary contact block with a 6 A conventional free-air thermal current, designed for tool-free side mounting on compatible ABB ESB..N installation contactors and EN..N installation relays.
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.
Technical Specifications
Tick the specs you need, then view products that match.
Terminal Type
Screw
Load Voltage
500 V AC
Switching Current (A)
3 A
Series
EH04..N
ABB order code
1SAE901901R1020
Product type
Auxiliary contact block
Auxiliary contacts
2NO / 0NC
Number of poles
2
Conventional free-air thermal current
6 A
Rated operational current AC-15
3 A at 415 V AC
Rated operational current DC-13
0.55 A at 125 V DC
Rated operational voltage
500 V AC
Rated insulation voltage
500 V
Rated impulse withstand voltage
4 kV
Rated frequency
50 / 60 Hz
Maximum operating voltage UL/CSA
600 V AC/DC
Protection rating
IP20
Maximum electrical switching frequency (AC-15)
360 cycles/hour
Mounting type
Side mounting / clip-on
Terminal type
Screw terminals
Operating temperature
-25 to +55 °C
Dimensions (H × W × D)
approx. 85 × 9 × 65 mm
Weight
approx. 0.04 kg
EAN
4013614527623
Compatible products
ESB16..N, ESB20..N, ESB25..N, ESB40..N, ESB63..N, ESB100..N, EN20..N, EN25..N and EN40..N
Frequently Asked Questions
What is the ABB EH04-20N used for?
The EH04-20N adds auxiliary contacts to compatible ABB ESB..N installation contactors and EN..N installation relays for signalling, feedback, interlocking and control circuit functions.
What contact configuration does the EH04-20N provide?
The EH04-20N provides two normally open auxiliary contacts (2NO) and no normally closed contacts.
Which ABB devices are compatible with the EH04-20N?
It is suitable for ABB ESB16..N, ESB20..N, ESB25..N, ESB40..N, ESB63..N, ESB100..N, EN20..N, EN25..N and EN40..N devices.
What is the current rating of the ABB EH04-20N?
The auxiliary circuit has a conventional free-air thermal current of 6 A, with an AC-15 rated operational current of 3 A at 415 V AC.
How is the ABB EH04-20N installed?
The EH04-20N is designed for tool-free side mounting on compatible ABB installation contactors and relays and uses screw terminals for electrical connections.
Trusted ABB Control Accessories
ABB EH04..N auxiliary contact blocks provide a compact and convenient way to expand compatible installation contactors and relays with additional signalling, feedback and interlocking contacts for modern electrical control systems.
Terminal Type
Screw
Load Voltage
500 V AC
Switching Current (A)
3 A
Series
EH04..N
ABB order code
1SAE901901R1020
Product type
Auxiliary contact block
Auxiliary contacts
2NO / 0NC
Number of poles
2
Conventional free-air thermal current
6 A
Rated operational current AC-15
3 A at 415 V AC
Rated operational current DC-13
0.55 A at 125 V DC
Rated operational voltage
500 V AC
Rated insulation voltage
500 V
Rated impulse withstand voltage
4 kV
Rated frequency
50 / 60 Hz
Maximum operating voltage UL/CSA
600 V AC/DC
Protection rating
IP20
Maximum electrical switching frequency (AC-15)
360 cycles/hour
Mounting type
Side mounting / clip-on
Terminal type
Screw terminals
Operating temperature
-25 to +55 °C
Dimensions (H × W × D)
approx. 85 × 9 × 65 mm
Weight
approx. 0.04 kg
EAN
4013614527623
Compatible products
ESB16..N, ESB20..N, ESB25..N, ESB40..N, ESB63..N, ESB100..N, EN20..N, EN25..N and EN40..N
ESB25..N(38)
ESB16..N(24)
ESB20..N(24)
ESB40..N(17)
ESB63..N(17)
EN40..N(9)
EN25..N(5)
ESB100..N(4)
EN20..N(2)
No documents available for this product.
UK delivery
Delivery options
Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.
This productManufacturer Lead Time
Estimated Delivery 4 - 5 Days
Standard delivery
£8 ex VAT · free over £200
UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
Collect from our showroom
Mon–Fri, 8am–5pm
Order and pay online, then collect from our showroom.
Please allow 15–30 minutes after ordering for us to prepare your order.
Northern Ireland, ROI & export
Priced at checkout
We deliver to Northern Ireland, the Republic of Ireland and overseas.
Delivery is calculated at checkout based on your destination.
Orders with mixed availability
Shipped complete
If part of your order is on a lead time, we hold it and send everything together.
Need the in-stock items sooner? Ask us and we can split the delivery.
Business customer returns
Returns & order support
Need to return an item? Find the guidance for your order below, then contact our team before sending anything back.
Stocked items
Request within 30 days
Changed your mind or ordered the wrong item? Request a return within 30 days of receipt. There is no restocking charge.
Items must be unused, in resalable condition and in their original packaging, and returns need our approval first. Return carriage is at your cost, and the original delivery charge is not refunded.
Faulty or damaged items
Tell us as soon as possible
Faulty, damaged on delivery or the wrong product supplied? Contact our team as soon as possible with the details.
We will review the issue and arrange an appropriate resolution under our terms and conditions and your statutory rights.
Made-to-order items
Manufacturer approval needed
Manufactured, configured and special-order products can only be returned with the manufacturer’s approval. Any handling charge is agreed with you when you request the return.
This does not affect claims for faulty goods or items that do not meet the agreed specification.
Let’s get your return sorted.
Send your order number, product details and reason for return. For faults or delivery damage, include photographs if available. We will confirm the next steps.
The 30-day return request period applies to change-of-mind returns for stocked items. It does not limit your statutory rights for faulty or non-conforming goods.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
What product ranges do you supply
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Can you help specify the correct part?
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Do you have stock for urgent orders?
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
What are your delivery times and costs?
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
What about warranties, returns and faulty items?
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
