ABB - Electrification NFZB40ERT-21 - NFZB..RT contactor relays comply with the latest railway rolling stock standards and allow installation in passengers or driver cabins for trains frequently operating tunnels or undergrounds. They are used for switching auxiliary and control circuits. Improve the compactness of the installations thanks to reduced dimension and side-by-side mounting requiring less 15% width (without spacing) from -40 °C up to +70 °C. Meet all main rollling stocks standards: IEC 60947-4-1, IEC 60947-5-1, IEC 60077-1/-2 and applicable parts of EN 50155 standards, shocks and vibration withstand conforming to IEC 61373 cat. 1, class B. Reach the highest levels in fire and smoke behaviour with compliance to European standard EN 45545-2 (HL2, HL3 hazard levels) in group mounting Reduce train energy with lighter devices and requiring 68% less coil energy consumption in operation. Electronic coil interface handling large DC voltage fluctuation voltage, including several Uc DC control voltages used for battery supply and accepting sinusoïdal AC 50/60 Hz control supplies included inside Ucmin.... Ucmax voltage range. Max permitted AC 50/60 Hz control voltage must not be exceeded (see technical data). Wide range of auxiliary contact blocks for front and side mounting.
ABB - Electrification

NFZB40ERT-21

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Overview

The ABB NFZB40ERT-21 is a compact, high-reliability contactor relay designed for railway rolling stock applications, particularly in passenger and driver cabins of trains operating in tunnels or underground environments. This relay meets the stringent requirements of IEC 60947-4-1, IEC 60947-5-1, IEC 60077-1/-2, and EN 50155 standards, ensuring compatibility with global railway electrification systems. Key specifications include a general use rating of 600V AC with a rated operational current of 55A at ≤40°C, making it suitable for auxiliary and control circuit switching in demanding conditions. The NFZB40ERT-21 operates reliably across an extreme temperature range from -40°C to +70°C, with side-by-side mounting capability that reduces installation width by 15% compared to conventional designs—eliminating the need for spacing between units. Energy efficiency is a standout feature, with the relay consuming 68% less coil energy during operation while maintaining robust performance. Its electronic coil interface accommodates large DC voltage fluctuations, supporting multiple Uc DC control voltages (e.g., 24–60V DC) for battery-powered systems, as well as sinusoidal AC 50/60Hz control supplies within the Ucmin to Ucmax range. Compliance with EN 45545-2 (HL2, HL3 hazard levels) ensures superior fire and smoke behavior, critical for group mounting in rail applications. The relay withstands shocks and vibrations per IEC 61373 Category 1, Class B, guaranteeing durability in high-vibration environments typical of rail operations. With a compact AF38Z-40-00-21 form factor, the NFZB40ERT-21 is optimized for space-constrained installations without sacrificing performance. Additional flexibility is provided by a wide range of auxiliary contact blocks for both front and side mounting, enabling customization for diverse control circuit requirements. Ideal for modern electric and diesel-electric trains, metro systems, and light rail vehicles, the NFZB40ERT-21 delivers reliable switching for lighting, HVAC, door controls, and other auxiliary systems while meeting the rigorous safety and performance standards of the railway industry.
  • 55A AC rated operational current at ≤40°C, 600V AC general use rating
  • Operates reliably from -40°C to +70°C with side-by-side mounting (15% width reduction)
  • 68% less coil energy consumption, electronic coil interface for DC/AC control (24–60V DC, 50/60Hz AC)
  • Complies with IEC 60947-4-1, IEC 60947-5-1, IEC 60077-1/-2, EN 50155, EN 45545-2 (HL2/HL3)
  • IEC 61373 Cat. 1, Class B shock/vibration withstand, AF38Z-40-00-21 form factor
  • AF38Z-40-00-21 form factor with auxiliary contact blocks for front/side mounting

Specifications

Application
Mainly used for controlling 3-phase motors and generally for controlling power circuits up to 690 V AC and 220 V DC. The contactors can also be used for many other applications such as bypass, capacitor switching, lighting, DC power circuits.
Current Rating
55 A
Frequency
50/60 Hz
Mounting Type
Side-by-side
Rated Control Circuit Voltage
50 Hz /60 Hz 24 ... 60 V / DC Operation 20 ... 60 V
Series
NFZB
Size
82x110x108mm
Size
AF38Z-40-00-21
Special Features
NFZB..RT contactor relays comply with the latest railway rolling stock standards and allow installation in passengers or driver cabins for trains frequently operating tunnels or undergrounds. They are used for switching auxiliary and control circuits. Improve the compactness of the installations thanks to reduced dimension and side-by-side mounting requiring less 15% width (without spacing) from -40 °C up to +70 °C. Meet all main rollling stocks standards: IEC 60947-4-1, IEC 60947-5-1, IEC 60077-1/-2 and applicable parts of EN 50155 standards, shocks and vibration withstand conforming to IEC 61373 cat. 1, class B. Reach the highest levels in fire and smoke behaviour with compliance to European standard EN 45545-2 (HL2, HL3 hazard levels) in group mounting Reduce train energy with lighter devices and requiring 68% less coil energy consumption in operation. Electronic coil interface handling large DC voltage fluctuation voltage, including several Uc DC control voltages used for battery supply and accepting sinusoïdal AC 50/60 Hz control supplies included inside Ucmin.... Ucmax voltage range. Max permitted AC 50/60 Hz control voltage must not be exceeded (see technical data). Wide range of auxiliary contact blocks for front and side mounting.
Standard
RoHs, CSA, cUL, CE, GOST
Terminal Type
Ring-Tongue Terminals
Type
Contactors
Voltage Rating
600 V AC
Package Dimensions (L x W x H)
3.11 IN x 3.425 IN x 1.85 IN
Package Dimensions (L x W x H)
7.8994 cm x 8.6995 cm x 4.699 cm
Package Weight (Imperial)
0.730 L
Package Weight (Metric)
0.331 kg
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Ground Lug

DNGL

Ground Lug
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CONTACT BLOCK BU BFB-20

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Frequently Asked Questions

What standards does the NFZB40ERT-21 comply with?

It complies with IEC 60947-4-1, IEC 60947-5-1, IEC 60077-1/-2, EN 50155, and EN 45545-2 (HL2/HL3).

What is the operating temperature range?

The relay operates reliably from -40°C to +70°C.

What is the form factor of the NFZB40ERT-21?

The form factor is AF38Z-40-00-21.

What is the rated operational current of the NFZB40ERT-21?

The rated operational current is 55A at ≤40°C for 600V AC general use.

What shock and vibration standards does the NFZB40ERT-21 meet?

It meets IEC 61373 Category 1, Class B for shocks and vibrations.

Does the NFZB40ERT-21 support side-by-side mounting?

Yes, side-by-side mounting reduces installation width by 15% without spacing.

What is the coil energy consumption of the NFZB40ERT-21?

The relay requires 68% less coil energy during operation compared to conventional designs.

What control voltages does the NFZB40ERT-21 support?

The electronic coil interface supports 24–60V DC and 50/60Hz AC control voltages within the Ucmin to Ucmax range.

Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

What technical support does Jokab Safety offer?

Jokab Safety offers comprehensive technical support through multiple channels, including a dedicated technical support phone line at (888) 385-1221 (Option 1) and email support at [email protected]. For advanced technical assistance, customers can contact their specialized Jokab Tech Support at (519) 982-0976 or email [email protected]. Additionally, they provide product specialist support through Jeff Leslie, who can be reached at (519) 982-0976, offering in-depth application and technical guidance.

What are the main product lines offered by Jokab Safety?

Jokab Safety offers a comprehensive range of machine safety products including safety light guards (Orion), safety controllers (Pluto), safety relays (Sentry), safety edges, safety contact mats, safety locks (Gkey), and safety sensors with OSSD and DYNlink interfaces. Their product lines are specifically designed for industrial applications in food and beverage, packaging, and material handling industries, providing robust safety solutions for machine guarding and personnel protection.

What are the key features of Jokab Safety products?

Jokab Safety products offer comprehensive industrial safety solutions with key features including: highest safety certification levels (up to PL e/Cat 4), extensive fault detection, multiple safety device types (optical safety devices, pressure sensitive devices, sensors, switches, locks, emergency stops), and innovative DYNlink technology that reduces cable requirements and simplifies installation. Their products are certified, verified, and compatible with major industrial automation systems like B&R, featuring easy M12 connector connections and a wide range of adapters to streamline safety implementation.

What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

What industries and applications are ABB - Electrification products used for?

ABB - Electrification products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

What technical support does ABB - Electrification offer?

ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

What are the main product lines offered by ABB - Electrification?

ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

What are the key features of ABB - Electrification products?

ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.