NFZB31EK-23

Name: NFZB31EK-23
Brand: ABB
SKU: NFZB31EK-23

The ABB NFZB31EK-23 is a contact relay compliant with the latest railway rolling stock standards, ideal for passenger or driver cabins. It features push-in spring terminals, compact design, and high fire and smoke behavior compliance.

Product ModelNFZB31EK-23

Material Number1SBH136063R2331

Product ID87659

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Compliance with Railway StandardsThe NFZB31EK-23 meets all main general and rolling stocks standards, including IEC 60947-5-1, IEC 60077-1/-2, and EN 50155, ensuring it withstands shocks and vibrations.
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2. Compact and Efficient DesignWith reduced dimensions and side-by-side mounting, this contact relay requires less width (15% less) and operates efficiently from -40 °C to +70 °C.
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3. Electronic Coil InterfaceIt accepts a wide DC control voltage range (e.g., 72, 96, 110 V DC) as per IEC 60077, making it suitable for battery supply systems.
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4. High Fire and Smoke Behavior ComplianceThe NFZB31EK-23 complies with European standard EN 45545-2 (HL2, HL3 hazard levels) in group mounting, ensuring high levels of fire and smoke behavior.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

45 mm

Product Net Depth / Length

77 mm

Product Net Height

92.3 mm

Product Net Weight

0.315 kg

Number of Auxiliary Contacts NO

Number of Auxiliary Contacts NC

5. Reduced Energy ConsumptionThis contact relay requires 68% less coil energy consumption in operation, contributing to reduced train energy and a more efficient system.

IEC/EN 60947-1, IEC/EN 60947-5-1, UL 60947-5-1, CSA C22.2 No. 60947-5-1, IEC 60077-1 (applicable parts), IEC 60077-2 (applicable parts), EN 50155 (applicable parts), TR CU 001/2011, IEC 61373, For compliance confirmation on applicable parts based on your application and combination, please consult your ABB sales representatives.

Rated Operational Voltage

Auxiliary Circuit 690 V Main Circuit 690 V

Rated Frequency (f)

Auxiliary Circuit 50 / 60 Hz Control Circuit 50 / 60 Hz Main Circuit 50 / 60 Hz

Conventional Free-air Thermal Current (Ith)

acc. to IEC 60947-5-1, Î = 40 Â°C 16 A

Rated Operational Current AC-15 (Ie)

(500 V) 2 A (690 V) 2 A (24 / 127 V) 6 A (220 / 240 V) 4 A (400 / 440 V) 3 A

Rated Short-time Withstand Current Low Voltage (Icw)

for 0.1 s 140 A for 1 s 100 A

Maximum Electrical Switching Frequency

(AC-15) 1200 cycles per hour (DC-13) 900 cycles per hour

Rated Operational Current DC-13 (Ie)

(24 V) 6 A / 144 W (48 V) 2.8 A / 134 W (72 V) 1 A / 72 W (110 V) 0.55 A / 60 W (125 V) 0.55 A / 69 W (220 V) 0.27 A / 60 W (250 V) 0.27 A / 68 W (400 V) 0.15 A / 60 W (500 V) 0.13 A / 65 W (600 V) 0.1 A / 60 W

Rated Insulation Voltage (Ui)

acc. to IEC 60947-5-1 690 V acc. to UL/CSA 600 V

Rated Impulse Withstand Voltage (Uimp)

6 kV

Maximum Mechanical Switching Frequency

6000 cycles per hour

Rated Control Circuit Voltage (Uc)

50 Hz 100 ... 250 V 60 Hz 100 ... 250 V DC Operation 100 ... 250 V

Operate Time

Between Coil De-energization and NC Contact Closing 13 ... 98 ms Between Coil De-energization and NO Contact Opening 11 ... 95 ms Between Coil Energization and NC Contact Opening 38 ... 90 ms Between Coil Energization and NO Contact Closing 40 ... 95 ms

Mounting on DIN Rail

TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715

Mounting by Screws (not supplied)

2 x M4 screws placed diagonally

Connecting Capacity Auxiliary Circuit

Flexible with Ferrule 1/2x 0.5 ... 2.5 mmÂ² Flexible with Insulated Ferrule 1/2x 0.5 ... 1.5 mmÂ² Flexible 1/2x 0.5 ... 2.5 mmÂ² Rigid Solid 1/2x 1 ... 2.5 mmÂ²

Connecting Capacity Control Circuit

Flexible with Ferrule 1/2x 0.5 ... 2.5 mmÂ² Flexible with Insulated Ferrule 1/2x 0.5 ... 1.5 mmÂ² Flexible 1/2x 0.5 ... 2.5 mmÂ² Rigid Solid 1/2x 1 ... 2.5 mmÂ²

Wire Stripping Length

Auxiliary Circuit 10 mm Control Circuit 10 mm

Degree of Protection

acc. to IEC 60529, IEC 60947-1, EN 60529 Auxiliary Terminals IP20 acc. to IEC 60529, IEC 60947-1, EN 60529 Coil Terminals IP20

Terminal Type

Push-in Spring Terminals

Connecting Capacity Auxiliary Circuit UL/CSA

Rigid Solid 1/2x 18-14 AWG

Connecting Capacity Control Circuit UL/CSA

Rigid Solid 1/2x 18-14 AWG

Ambient Air Temperature

Close to Contactor for Storage -60 ... +80 Â°C Near Contactor for Operation in Free Air -40 ... 70 Â°C Near Contactor for Operation in Free Air (0.85 ... 1.1 Uc) -40 ... +60 Â°C Near Contactor for Operation in Free Air (Uc) -40 ... 70 Â°C

Climatic Withstand

Category B according to IEC 60947-1 Annex Q

Maximum Operating Altitude Permissible

Without Derating 3000 m

Resistance to Vibrations

4g Closed Position & 2g Open position 5 ... 300 Hz

Object Classification Code

ETIM 7

EC000196 - Contactor relay

ETIM 8

EC000196 - Contactor relay

ETIM 9

EC000196 - Contactor relay

eClass

V11.0 : 27371001

UNSPSC

39121500

Manufacturer ID

1SBH136063R2331