MS116 Low Voltage Motor Protection Circuit Breaker

The ABB MS116-16 is a compact motor protection circuit breaker designed for reliable motor control and protection in industrial applications. It provides comprehensive protection against overload, short-circuit, and phase loss for three-phase motors up to 7.5kW at 400V. With a 16A adjustable current range and Class 10A tripping characteristic, it ensures safe motor starting without nuisance tripping. The unit features a 50kA breaking capacity at 400V, temperature compensation from -25°C to +60°C, and a lockable handle for safety isolation. Its compact 45mm width saves panel space, while modular design allows easy integration with contactors and auxiliary contacts.

product details

Type and Meaning

1	Series Number MS: Thermal-magnetic trip MO: Magnetic-only trip
2	Rated current, trip class and breaking capacity 116-32A, Class 10A (10/16/30/50kA) 132-32A, Class 10A (25/50/100kA) 450-50A, Class 10A (50kA) 451-50A, Class 20A (50kA) 495-100A, Class 10A (50kA) 496-100A, Class 20A (100kA) 497-100A, Class 10A (100kA)
3	Thermal protection setting value

Product Features

Model	MS116
Thermal protection and electromagnetic protection	Yes
Electromagnetic protection	-
Phase failure protection	Yes

Switch position…	ON/OFF

Magnetic release indication	-

Lockable handle,no accessories required	-

Isolation function	Yes

Width	45mm

Rated operating current	0.16...32A

Current setting range	0.1...32A
Ambient air temperature	-25...+55°C*)

product Display

MS116 Low Voltage Motor Protection Circuit Breaker top

MS116 LV Motor Protection Circuit Breaker view

Technical Parameters

Type	MS116	MS132	MS165
Thermal and magnetic protection	Yes	Yes	Yes
Magnetic protection	-	-	-
Phase failure protection	Yes	Yes	Yes
Switch position	ON/OFF	ON/OFF/TRIP	ON/OFF/TRIP
Magnetic trip indication	-	Yes	Yes
Lockable handle, no accessories required	-	Yes	Yes
Isolation function	Yes	Yes	Yes
Width	45mm	45 mm	55 mm
Rated operational current (Iₑ)	0.16...32A	0.16..32A	16...65 A
Current setting range	0.1...32 A	0.1...32 A	10...65A
Ambient air temperature	-25...+55C	-25...+60C"	-20…+60*C"
"Compensated

Rated Short-Circuit Breaking Capacity (for 400/415V)

Motor Rated Power	Thermal Trip Setting Range	Type	Short-Circuit Breaking Capacity
Motor Rated Power	Thermal Trip Setting Range	Type	Icu	Ice
0.03 kW	0.1…0.16A	MS116-0.16	50 kA	50 kA
0.06 kW	0.16…0.25A	MS116-0.25	50kA	50 kA
0.09 kW	0.25…0.4A	MS116-0.4	50kA	50 kA
0.18 kW	0.4…0.63A	MS116-0.63	50kA	50kA
0.25 kW	0.63…1.0A	MS116-1.0	50kA	50kA
0.55 kW	1.0…1.6A	MS116-1.6	50 kA	50 kA
0.75kW	1.6…2.5A	MS116-2.5	50 kA	50 kA
1.5kW	2.5…4.0A	MS116-4.0	50kA	50kA
2.2 kW	4.0…6.3A	MS116-6.3	50kA	50kA
4.0 kW	6.3...10 A	MS116-10	50 kA	50 kA
5.5 kW	8…12A	MS116-12	25 kA	25 kA
7.5 kW	10…16A	MS116-16	16kA	16kA
7.5 kW	14...20 A
7.5kW	16…20 A	MS116-20	15kA	10 kA
11 kW	18…25A
11 kW	20…25A	MS116-25	15kA	10 kA
15 kW	25…32A	MS116-32	10 kA	10 kA
15kW	23...32A
22 kW	30…42A
22kW	40...54 A
30 kW	52…65A
1)690V