cBallast
Industrial Parts Catalog
Datasheet generated 2026-10-07
sales@cballast.com
cballast.com

Schneider Electric NG125 - circuit breaker - NG125N - 4P - 20A - C curve 18651

Schneider Electric · Electrical Components · Miniature Circuit Breakers · France · se.com
Part Number
18651  ·  HS 8536.20
Schneider Electric NG125 - circuit breaker - NG125N - 4P - 20A - C curve 18651

Schneider Electric 18651 NG125N/C 20-4 Modular power switch

Technical Specifications

Manufacturer part number (MPN)18651
EAN / GTIN3303430186519
Sales unitpcs
Package quantity12 pcs
RangeActi9
Product nameActi9 NG125
Product or component typeMiniature circuit-breaker
Device short nameNG125N
Device applicationDistribution
Poles description4P
Number of protected poles4
[In] rated current20 A at 40 °C
Network typeAC; DC
Trip unit technologyThermal-magnetic
Curve codeC
Breaking capacity20 kA Icu at <= 500 V DC conforming to EN/IEC 60947-2; 10 kA Icu at 500 V AC 50/60 Hz conforming to EN/IEC 60947-2; 20 kA Icu at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2; 25 kA Icu at 380...415 V AC 50/60 Hz conforming to EN/IEC 60947-2; 50 kA Icu at 220...240 V AC 50/60 Hz conforming to EN/IEC 60947-2
Utilisation categoryCategory A conforming to IEC 60947-2
Suitability for isolationYes conforming to IEC 60947-2
StandardsEN/IEC 60947-2
Network frequency50/60 Hz
[Ue] rated operational voltage380...415 V AC 50/60 Hz; 500 V AC 50/60 Hz; <= 500 V DC; 220...240 V AC 50/60 Hz; 440 V AC 50/60 Hz
Magnetic tripping limit8 x In
[Ics] rated service breaking capacity37.5 kA 75 % conforming to EN/IEC 60947-2 - 220...240 V AC 50/60 Hz; 18.75 kA 75 % conforming to EN/IEC 60947-2 - 380...415 V AC 50/60 Hz; 15 kA 75 % conforming to EN/IEC 60947-2 - 440 V AC 50/60 Hz; 7.5 kA 75 % conforming to EN/IEC 60947-2 - 500 V AC 50/60 Hz; 20 kA 100 % conforming to EN/IEC 60947-2 - <= 500 V DC
[Ui] rated insulation voltage690 V AC 50/60 Hz conforming to EN/IEC 60947-2
[Uimp] rated impulse withstand voltage8 kV conforming to EN/IEC 60947-2
Contact position indicatorYes
Control typeToggle; Manual tripping test
Local signallingTrip indicator; ON/OFF indication
mounting modeClip-on
Mounting positionVertical
Mounting support35 mm symmetrical DIN rail
Comb busbar and distribution block compatibilityYES
9 mm pitches12
Height103 mm
Depth81 mm
Width108 mm
Product weight0.96 kg
Mechanical durability20000 cycles
Electrical durability10000 cycles
Provision for padlockingPadlockable
Locking options descriptionIntegrated padlocking
Connections - terminalsTunnel type terminals1.5…50 mm² rigid; Tunnel type terminals1…35 mm² flexible
Wire stripping length20 mm
Tightening torque3.5 N.m
Earth-leakage protectionSeparate block
IP degree of protectionIP20 conforming to IEC 60529
IK degree of protectionIK05 conforming to EN/IEC 62262
Pollution degree3 conforming to IEC 60947-2
Overvoltage categoryIV
Tropicalisation2 conforming to IEC 60068-1
Relative humidity95 % at 55 °C
Ambient air temperature for operation-30…70 °C
Ambient air temperature for storage-40…70 °C
Unit Type of Package 1PCE
Number of Units in Package 11
Package 1 Height8.2 cm
Package 1 Width12.4 cm
Package 1 Length15.6 cm
Package 1 Weight980.0 g
Unit Type of Package 2S03
Number of Units in Package 212
Package 2 Height30 cm
Package 2 Width30 cm
Package 2 Length40 cm
Package 2 Weight12.272 kg
Country of originFR
Warranty (in months)18
Power loss2.7 W
Built-in depth47 mm
Release characteristicC
Number of poles (total)4
Rated current20 A
Rated voltage400 V
Rated insulation voltage Ui690 V
Rated impulse withstand voltage Uimp8 kV
Frequency50–60 Hz
Concurrently switching neutral conductorYes
Additional equipment possibleYes
Width in number of modular spacings6
Degree of protection (IP)IP20
Ambient temperature during operating-30–70 °C
Connectable conductor cross section multi-wired1–35 mm²
Connectable conductor cross section solid-core1.5–50 mm²
Explosion-proofNo
Flush-mounted installationNo

Properties

MOQ1

Cross-References

Attached Documents