ABB MS116-1.6 1SAM250000R1006 Fail-Safe Motor Breaker

Overview

ABB MS116-1.6 1SAM250000R1006 Fail-Safe Motor Breaker for Industrial Control Reliability

The ABB MS116-1.6 (1SAM250000R1006) is a 3-pole motor protective circuit breaker (MPCB) engineered for fail-safe motor protection in demanding industrial environments. With a rated current adjustment range of 1.0–1.6A and full compliance with IEC 60947-4-1, this device delivers reliable overload and short-circuit protection for small motors and critical control loads across continuous production, chemical processing, power generation, and heavy-duty automation systems.

Designed and manufactured in Germany to ABB’s exacting quality standards, the MS116-1.6 integrates directly into standard control cabinets and motor control centers (MCCs), providing deterministic trip response that eliminates nuisance tripping while ensuring genuine fault isolation. Its compact 45mm DIN-rail footprint and IP20 protection rating make it suitable for panel-mounted applications where space efficiency and personnel safety are both priorities.

Fail-Safe Reliability Table

Control Cabinet Protection Strategy

In a well-engineered motor control cabinet, the MS116-1.6 functions as the first line of defense for low-current motor branches. It is typically installed downstream of an ABB S200 series miniature circuit breaker providing upstream feeder protection, and upstream of an ABB A9 or A16 contactor that handles switching duty. This three-element architecture — breaker, contactor, and overload relay — is the backbone of IEC-compliant motor starters and ensures that any fault is isolated at the correct protection level without cascading to adjacent circuits.

In high electromagnetic interference (EMI) environments such as variable frequency drive (VFD) panels or arc furnace auxiliary boards, the MS116-1.6’s thermal-magnetic trip mechanism operates independently of control voltage, making it immune to signal noise, ground loops, and power supply fluctuations that can compromise electronic protection relays. Pairing it with an ABB CM-MPS motor protection relay adds phase-loss and phase-imbalance detection for enhanced motor safety in three-phase systems.

For cabinets operating in dusty, humid, or high-vibration environments — common in mining headframes, offshore platforms, and cement plant auxiliary drives — the MS116-1.6’s sealed thermal element and vibration-rated construction (IEC 60068-2-6) maintain calibration accuracy over extended service intervals. Supplementing the cabinet with an ABB OVR surge protective device (SPD) on the incoming supply rail guards against transient overvoltages and lightning-induced surges that can degrade breaker contacts and shorten service life. Where cabinet thermal management is critical, integrating an ABB EKDS or equivalent cabinet cooling unit alongside the MS116-1.6 ensures that ambient temperature within the enclosure stays within the breaker’s rated operating band, preserving trip accuracy and preventing thermal runaway in densely packed panels.

Critical Industrial Safety Applications

Petrochemical & Refinery Plants: In continuous process environments where motor trips translate directly to production loss and safety incidents, the MS116-1.6 protects pump and agitator motors in hazardous area control panels. Its deterministic overload response prevents motor winding damage during process upsets, reducing unplanned maintenance in areas where hot-work permits and confined-space procedures make repairs costly and time-consuming.

Power Generation & Substation Auxiliary Systems: Auxiliary motor loads — cooling fans, lube oil pumps, and exciter blowers — are critical to generator availability. The MS116-1.6 provides reliable branch protection for these loads in 400V auxiliary distribution boards, ensuring that a single motor fault does not propagate to adjacent feeders or compromise plant black-start capability.

Mining & Mineral Processing: Underground and surface mining operations subject control equipment to extreme vibration, coal dust ingress, and wide temperature swings. The MS116-1.6’s robust mechanical construction and DIN-rail locking mechanism maintain secure installation under these conditions, supporting reliable operation of conveyor drive auxiliaries, ventilation fan starters, and dewatering pump controls.

Water & Wastewater Treatment: Pump station motor control panels in water treatment facilities demand long-interval reliability with minimal maintenance access. The MS116-1.6’s maintenance-free thermal-magnetic mechanism and stable trip characteristics over a wide temperature range make it a preferred choice for remote pump station MCCs where service visits are infrequent.

Metallurgy & Steel Mills: Rolling mill auxiliary drives and furnace cooling systems operate in environments with high radiated heat and electromagnetic noise from large thyristor drives. The MS116-1.6’s independence from external control power ensures that motor protection remains active even during control system faults or power supply interruptions — a critical safety requirement in melt shop and casting line applications.

Port & Marine Applications: Crane auxiliary motors, hatch cover drives, and ballast pump starters on vessels and port equipment require compact, vibration-resistant motor protection. The MS116-1.6’s small footprint and IEC marine-compatible ratings support integration into space-constrained switchboards where reliability and fast fault clearance are non-negotiable.

Safety and Quality FAQ

Q1: Does the MS116-1.6 1SAM250000R1006 come with a support terms?
Yes. Every unit supplied by KNMKS carries a support terms confirmed by quotation covering manufacturing defects and premature failure under normal operating conditions. All units undergo pre-shipment functional testing — including trip verification at overload and short-circuit thresholds — before dispatch.

Q2: Is this unit compatible with ABB MS116 series accessories such as auxiliary contacts and shunt trips?
Yes. The MS116-1.6 is fully compatible with the ABB MS116 accessory range, including front-mounted auxiliary contact blocks (e.g., HK1-11), shunt trip releases, and undervoltage releases. These accessories can be field-fitted without special tools, supporting integration into safety relay circuits and remote trip architectures.

Q3: How does KNMKS ensure the authenticity and condition of supplied units?
KNMKS sources MS116 series breakers from authorized distribution channels and maintains traceability documentation for each batch. Units are inspected upon receipt, stored in climate-controlled warehouses, and re-tested prior to shipment. Packaging integrity and date codes are verified before every order is released.

Q4: Can KNMKS support long-term or scheduled supply agreements for the MS116-1.6?
Yes. KNMKS maintains multi-region buffer stock of high-demand ABB MS116 series SKUs to support both emergency replacement orders and scheduled maintenance programs. Framework agreements with fixed pricing and guaranteed lead times are available for facilities with recurring demand — contact our team at admin@knmks.com to discuss your requirements.

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Product Identification

Brand / Ecosystem

ABB
ABB

Model / Series

MS116-1.6 1SAM250000R1006

Product Family

Servo Systems

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Motion range

Servo drives, motors and cable sets

Common needs

Power, encoder and brake confirmation

Project support

Motion upgrade and spare-part supply

Inquiry Support

• Motor, drive and cable set coordination
• Power rating and encoder type checking
• Motion control replacement support

What to Send Us

• Brand and exact model number: ABB MS116-1.6 1SAM250000R1006
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference