ABB MS116-20 Technical Specifications
Model: ABB MS116-20
Type: Motor Protection Circuit Breaker (MPCB)
Adjustable current range: 16A～20A
Number of poles: 3P
Rated operational voltage: 690V AC
Rated insulation voltage (Ui): 690V
Rated frequency: 50/60Hz
Trip type: Thermal-magnetic trip
Rated service short-circuit breaking capacity (Ics) at 400V: 10kA Mounting: 35mm DIN rail
Protection class: IP20
Operation: Rotary manual control
What is ABB MS116-20?
The ABB MS116-20 is a classic rotary Motor Protection Circuit Breaker (MPCB) from the ABB MS116 series, and it is the most widely adopted protector for small and medium-sized industrial motors. It features an adjustable current range of 16A–20A, ideal for 400V 3-phase 9kW motors. It works well with both three-phase and standard single-phase motors, suitable for automation equipment and electrical control systems under ordinary operating conditions.
Features of ABB MS116-20
• Adjustable current range: 16A～20A, 3-pole design
• Rated operational voltage: 690V AC with thermal-magnetic trip
• Integrated disconnect function, offering overload, short-circuit and phase loss protection
• Rotary knob operation with clear status indication
• Standard 35mm DIN rail mounting
• Expandable with auxiliary contacts, alarm contacts and other accessories
• Compact structure for easy maintenance
Selection Tips
Many buyers select components simply based on motor power. Please note that when choosing the ABB MS116-20, always refer to the rated current on the motor nameplate instead of power alone.
This MPCB features an adjustable current range of 16A～20A, matching 9kW 3-phase motors at 400V. Rated service short-circuit breaking capacity (Ics) is 10kA at 400V, suitable for small and medium motors under stable operating conditions with low short-circuit risks.
If your site has unstable power grids or motors running under heavy frequent start-stop loads with higher short-circuit requirements, upgrade to the high-breaking ABB MS132 series.
The MS116-20 can also be used for single-phase motors. Calculate the actual load current carefully before setting parameters.
Product Summary
The ABB MS116-20 is a cost-effective MPCB for small and medium 9kW 3-phase industrial motors within the 16–20A range. It delivers integrated protection, adjustable current setting, reliable performance, easy installation and flexible expandability.
Compared with the traditional combination of circuit breaker and thermal relay, it simplifies cabinet wiring, improves protection accuracy and helps save costs. As a popular model in the MS116 series, it fits most standard automation applications and serves as a practical choice for machine assembly, maintenance and control cabinet retrofits.
Aftersales Support
Quantity available: In stock.
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Warranty: 12 months.
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Lead time: Shipment within 3-5 working days.
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Terms of payment: T/T. RMB (CNY) support.
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Courier partners: FedEx, DHL, UPS, TNT, EMS, SF express.
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FAQ
Q1: Can the ABB MS116-20 continuously carry a 20A load when the setting current is adjusted to 20A?
A1: It can operate within the set current range, yet it is recommended to set the current based on the rated current shown on the motor nameplate instead of turning it up to maximum. Motors generate inrush current during startup. Proper adjustment helps avoid nuisance tripping and ensures reliable overload protection.
Q2: How to wire the MS116-20 together with a contactor?
A2: Standard wiring scheme: connect the power supply to the MS116-20 first, then link the output terminals to the AC contactor, and finally connect to the motor. The MPCB provides short-circuit and overload protection, while the contactor handles frequent switching. This clear division of duties is the common wiring practice in the industry.
Q3: Can the handle of ABB MS116-20 be fitted with a lock?
A3: Yes. When equipped with an optional lock attachment, the handle can be locked in the OFF position. It prevents accidental switching on during maintenance and meets on-site safe isolation requirements.
Q4: How can I place an order or apply for bulk purchase discounts?
A4: Send your required order quantity via email to Irene8866@163.com, or leave us a message on WhatsApp (+86 18950163907). We will reply within 24 hours with formal quotation and stock confirmation.
For more product information, please contact our professional sales team to obtain the latest pricing and stock information for the ABB MS116-20!
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