ABB NFZB44E-21: Railway-compliant contactor relay with 24-60V 50/60Hz and 20-60VDC operation, built-in surge protection, and mechanically linked auxiliary contacts.
Product ModelNFZB44E-21
Material Number1SBH136061R2144
Product ID87984
Stock on Request
Last updated: 8/29/2026
Key Features
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1. Railway Standard ComplianceThe NFZB44E-21 meets the latest railway rolling stock standards, making it suitable for installation in passengers or driver cabins of trains.
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2. Wide Control Voltage RangeThis contactor relay operates on a wide control voltage range of 24-60V 50/60Hz and 20-60VDC, ensuring flexibility in various applications.
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3. Built-in Surge ProtectionThe NFZB44E-21 features built-in surge protection, eliminating the need for additional surge suppressors and enhancing overall reliability.
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4. Mechanically Linked Auxiliary ContactsThe relay includes mechanically linked auxiliary contact elements, ensuring precise control and reliable operation.
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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
86 mm
Product Net Height
86 mm
Product Net Weight
0.37 kg
Number of Auxiliary Contacts NO
4
Number of Auxiliary Contacts NC
4
5. High Operational FrequencyWith a maximum electrical switching frequency of 1200 cycles per hour (AC-15) and 900 cycles per hour (DC-13), this contactor relay can handle high operational demands efficiently.
Standards
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
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, Π= 40 °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 24 ... 60 V 60 Hz 24 ... 60 V DC Operation 20 ... 60 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
