ABB - Electrification Signature Partner Distributor
ABB - Electrification NF40EK-11 - NF..K contactor relays are used for switching auxiliary and control circuits. NF contactor relays include an electronic coil interface accepting a wide control voltage Uc min. ... Uc max. Only four coils cover control voltages between 24...500 V 50/60 Hz or 20...500 V DC. NF contactor relays can manage large control voltage variations. One coil can be used for different control voltages used worldwide without any coil change. NF contactor relays have built-in surge protection and do not require additional surge suppressors. NF..K include Push-in Spring terminals. Only one push is all you need for extremely fast wiring: faster than ever installation, easier than ever wiring, reliable as ever connections. - Poles: 4-pole contactor relays (mechanically-linked auxiliary contacts compliant with Annex L of IEC 60947-5-1 and including the "Mechanically Linked" symbol on the contactor relay side) - Accessories: a wide range of accessories is available.
ABB - Electrification

NF40EK-11


Documents & Media
Specification Sheet

Contact for Pricing

Overview

The ABB NF40EK-11 is a 4-pole contactor relay designed for switching auxiliary and control circuits in industrial automation, motor control, and panel building applications. Part of ABB’s NF..K series, this block-type relay features an electronic coil interface that accepts a wide control voltage range from 24 to 500 V AC (50/60 Hz) or 20 to 500 V DC, eliminating the need for coil changes across global voltage standards. Only four coils cover all standard control voltages worldwide, simplifying inventory and reducing system complexity. Key specifications include mechanically-linked auxiliary contacts compliant with Annex L of IEC 60947-5-1, marked with the "Mechanically Linked" symbol for clear identification. The relay supports 4 poles with a permanently fixed 4-pole auxiliary contact block, ensuring reliable switching of control circuits. Built-in surge suppression eliminates the need for external surge suppressors, reducing panel complexity and component count. The NF40EK-11 features Push-in Spring terminals for fast, tool-free wiring. A single push secures conductors, enabling quicker installation and easier maintenance compared to traditional screw terminals. This design reduces labor time and minimizes the risk of loose connections, enhancing system reliability. Additional benefits include reduced panel energy consumption due to the electronic coil interface and very distinct closing/opening actions for clear operational feedback. The relay is compatible with a wide range of accessories for front or side mounting, allowing flexible system expansion. Manufactured in the US, the NF40EK-11 is ideal for applications requiring robust, efficient control circuit switching in industrial, commercial, and infrastructure environments.
  • 4-pole contactor relay with mechanically-linked auxiliary contacts (IEC 60947-5-1 Annex L compliant)
  • Electronic coil interface accepts 24–500V AC (50/60Hz) or 20–500V DC; only 4 coils cover all global control voltages
  • Built-in surge suppression eliminates need for external surge suppressors
  • Push-in Spring terminals for tool-free, fast wiring with secure, reliable connections
  • Compatible with a wide range of accessories for front or side mounting

Specifications

Connection Type
Push-in Spring terminals
Frequency
50/60 Hz
Poles
4
Rated Control Circuit Voltage
50 Hz /60 Hz 24 ... 60 V / DC Operation 20 ... 60 V
Series
NF..K
Special Features
NF..K contactor relays are used for switching auxiliary and control circuits. NF contactor relays include an electronic coil interface accepting a wide control voltage Uc min. ... Uc max. Only four coils cover control voltages between 24...500 V 50/60 Hz or 20...500 V DC. NF contactor relays can manage large control voltage variations. One coil can be used for different control voltages used worldwide without any coil change. NF contactor relays have built-in surge protection and do not require additional surge suppressors. NF..K include Push-in Spring terminals. Only one push is all you need for extremely fast wiring: faster than ever installation, easier than ever wiring, reliable as ever connections. - Poles: 4-pole contactor relays (mechanically-linked auxiliary contacts compliant with Annex L of IEC 60947-5-1 and including the "Mechanically Linked" symbol on the contactor relay side) - Accessories: a wide range of accessories is available.
Terminal Type
Push-in Spring Terminals
Voltage Rating
24...500 V 50/60 Hz or 20...500 V DC
Package Dimensions (L x W x H)
3.386 IN x 3.661 IN x 1.772 IN
Package Dimensions (L x W x H)
8.6004 cm x 9.2989 cm x 4.5009 cm
Package Weight (Imperial)
0.661 L
Package Weight (Metric)
0.300 kg
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LCMA6-8-C

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Ground Lug

DNGL

Ground Lug
CONTACT BLOCK BU BLB-02

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CONTACT BLOCK BU BLB-02
CONTACT BLOCK BU BFB-20

BFB-20

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Frequently Asked Questions

What is the rated control circuit voltage range?

The rated control circuit voltage is between 24 to 240V AC or 24V DC.

What type of terminals does the NF40EK-11 use?

It uses Push-in Spring Terminals for fast and reliable connections.

How many auxiliary contacts are included?

The device includes 10 auxiliary contacts.

What is the operating temperature range for this device?

It can operate in ambient air temperatures near the contactor for operation in free air between -25 to 55 degrees C.

What is the maximum operating altitude?

The maximum permissible operating altitude is 2000 meters.

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