Category: Industry trends

ABB S202 C2 2CDS252001R0024 Product Overview

In terminal power distribution systems,miniature circuit breakers(MCBs)are the”last line of defense.”The S202 C2 2CDS252001R0024 from ABB’s S200 series is a”mini circuit breaker”designed specifically for 2A terminal circuits.A classic model in the S200 family,this series enjoys an excellent reputation in commercial and industrial terminal power distribution.Whether it’s an office building outlet circuit or powering electronic equipment in a laboratory,as long as the rated current is under 2A and the neutral line needs to be disconnected,it reliably handles the important task,making it the preferred terminal protection option for many distribution engineers.

The S202 C2 2CDS252001R0024’s greatest strength is its”compact size and precise protection.”With an ultra-thin 18mm width and a 2P design,it only takes up one and a half module slots,allowing multiple units to be installed in a terminal distribution box.Its C-type tripping curve is particularly well-suited for electronic equipment.With a rated current of 2A,it prevents false tripping during motor startup surges while accurately tripping during overloads.A lab previously used a standard MCB,which repeatedly experienced false tripping during equipment startup.After switching to this MCB,the switch has had no false tripping for six months,allowing the lab equipment to operate continuously.

Furthermore,its low-temperature performance far exceeds that of standard MCBs—even in northern winters as low as-30°C,it can still close normally in outdoor distribution boxes without preheating.For applications requiring low-temperature environments or compact distribution boxes,this MCB truly delivers”big power in a small package.”

Main Features and Advantages

1.Compact Design,Allows for More Installation in Distribution Boxes

Anyone involved in terminal distribution knows that”distribution boxes are small,and MCBs take up space and are a nuisance.”The S202 C2 2CDS252001R0024 solves this pain point.With an ultra-thin 18mm width and a 2P dual-pole design,it only takes up 1.5 modules of the space of a traditional MCB.A 12-bay distribution box that originally held six 2P MCBs can now accommodate eight,and the freed-up space can even accommodate additional leakage current modules.Previously,the floor distribution boxes in an office building couldn’t accommodate all the MCBs,necessitating the addition of sub-boxes.With this new model,a single main box fulfilled the need,saving NT$200 in sub-box costs and taking up less wall space.

Its rail installation is also easy—it snaps directly onto a 35mm DIN rail without screws.An electrician can install one in 10 seconds,three times faster than traditional screw-mounted MCBs.During the renovation of a commercial complex,the installation of MCBs in 100 distribution boxes was completed two days ahead of schedule.2.Precise Type C Tripping,Effortless Load Protection

The Type C tripping curve of the S202 C2 2CDS252001R0024 is tailored for electronic and lighting loads.With a rated current of 2A,it will not trip during normal operation,even with a starting surge current of 10 times(20A).Once the current exceeds 1.45 times(2.9A),the bimetallic strip will gradually heat up and trip,protecting the equipment from burnout due to prolonged overload.An electronics factory’s PCB inspection equipment circuit previously used a Type B MCB,which repeatedly tripped during startup.After switching to this Type C MCB,the equipment started normally and provided timely protection during overloads,reducing the equipment failure rate by 60%.

It also offers fast short-circuit tripping—at 20 times(40A)of the short-circuit current,it trips in 0.02 seconds,50%faster than conventional MCBs,preventing short-circuit arcs from burning the wiring terminals.A laboratory’s power supply circuit experienced a short circuit.This micro-circuit breaker instantly cut off the circuit,burning only the plug.A slower-blow micro-circuit breaker would have burned both the socket and the wires,resulting in losses of at least 500 yuan.

3.Two-pole disconnection and neutral protection:”Safer”

Unlike 1P micro-circuit breakers that only disconnect the live wire,the S202 C2 2CDS252001R0024 features a 2P,two-pole design.When tripped,it simultaneously disconnects both the live and neutral wires,preventing electric shock from a live neutral.A hospital’s medical equipment circuit was previously using a 1P micro-circuit breaker.A poor neutral contact caused live neutral wires,nearly causing equipment failure.After replacing it with this 2P micro-circuit breaker,both the live and neutral wires were disconnected simultaneously,and the live neutral wire issue has never occurred again,meeting the safety requirements of medical facilities.

The terminal blocks are also reliable—the copper terminals offer excellent conductivity and strong clamping force,allowing 1.5mm²wires to connect without loosening or heating,even after long-term operation.A data center’s server terminal circuits use this MCB for 1.5mm²wires.After two years of operation,the terminals haven’t overheated,whereas the previously used conventional MCBs began to oxidize and heat up after just six months.

4.Wide Temperature Range and Harsh Environment Resistance:Withstands Complex Environments

The S202 C2 2CDS252001R0024’s environmental adaptability far exceeds that of conventional MCBs.It can close normally in winter,even in outdoor distribution boxes in Northeast China at-30°C,without the need for preheating like conventional MCBs.It also avoids false tripping due to high temperatures in sealed distribution boxes in southern China even in summers of+60°C.After replacing conventional MCBs in the power circuits of an outdoor communication base station with this MCB,the circuit breaker has experienced no difficulty closing in winter and no false tripping in summer,reducing the base station’s failure rate by 70%.

It also offers strong vibration resistance—compliant with IEC 60068-2-6—preventing the trip mechanism from loosening or failing in vibrating workshops or outdoor equipment.The workshop distribution box of a certain auto parts factory was installed next to a stamping machine and was subject to severe vibration.The ordinary micro-circuit breaker would always trip inexplicably.After replacing it with this model,the operation became stable,and no more vibration false tripping occurred.The workshop production efficiency increased by 15%.​

English Version:​

The ABB S202 C2 2CDS252001R0024 is a compact miniature circuit breaker(MCB)engineered for terminal power distribution protection in commercial,industrial,and residential applications.With a 2A rated current and C-type tripping curve,it is optimized for resistive-inductive loads such as electronic equipment and lighting systems,preventing nuisance tripping during startup while ensuring reliable overload and short-circuit protection.​

Featuring a 2-pole(2P)design,it simultaneously disconnects both line and neutral conductors during tripping,enhancing safety in applications requiring neutral isolation(e.g.,medical equipment,data centers).Its slim 18mm width maximizes panel space utilization—fitting 8 units in a 12-module distribution box compared to 6 traditional 2P MCBs.​

With a breaking capacity of 6kA(230/400V AC),it quickly interrupts short-circuit currents(<0.02s at 20In),minimizing arc damage.Operating from-30°C to 60°C,it withstands extreme temperatures,making it suitable for outdoor enclosures or tight panel spaces.Certified to IEC 60898-1 and GB 10963.1,the ABB S202 C2 2CDS252001R0024 delivers the durability and precision that define ABB’s terminal protection solutions,ideal for enhancing safety in critical end-circuit applications.

Application Areas

1.Commercial Buildings:Outlet Circuit Protection

Outlet circuits in office buildings and shopping malls require both neutral disconnection and overload protection—the S202 C2 2CDS252001R0024 is perfectly suited.This 2P micro-interrupter,rated at 2A,is suitable for connecting low-power devices such as laptops and printers to office outlet circuits in an office building.When tripped,it simultaneously disconnects both the live and neutral wires,preventing electric shock when employees plug in and out of outlets.Previously,I used a 1P MCB,which caused printer failures due to live neutral wires.After switching to this model,similar issues have disappeared,and the equipment repair rate has dropped by 50%.

2.Electronics Factory:Power Distribution for Testing Equipment

PCB testing and chip testing equipment in electronics factories require precise overload protection—the S202 C2 2CDS252001R0024 meets this requirement.A chip foundry uses this MCB in its test equipment circuits.The C-type tripping curve prevents false tripping due to equipment startup shocks and provides timely tripping during overloads,protecting test equipment worth tens of thousands of yuan from burning out.Previously,using a standard MCB,at least one instrument burned out every month.After switching to this model,we haven’t had any burnouts in six months,saving 100,000 yuan in repair costs.

3.Medical Facilities:Low-Power Medical Equipment

Hospital monitors,infusion pumps,and other low-power medical equipment require neutral wire protection and high reliability—the S202 C2 2CDS252001R0024 is a perfect fit.A community hospital uses this 2P MCB to protect the circuits of medical equipment in its wards.Its 2A current meets the equipment’s power requirements and simultaneously disconnects both the live and neutral wires,meeting medical safety standards.Previously,a conventional MCB had caused monitor alarms due to a neutral wire fault.After switching to this MCB,the equipment has maintained stable operation,eliminating safety hazards.

4.Outdoor Facilities:Power Distribution for Communication Base Stations

The power terminal circuits of outdoor communication base stations require resistance to low temperatures and vibration—the S202 C2 2CDS252001R0024 delivers.A certain operator’s 5G base station uses this MCB to protect the terminal equipment circuits.It closes normally in temperatures as low as-30°C and does not trip due to base station vibration.Previously,conventional MCBs had difficulty closing in winter.After switching to this MCB,the base station operates trouble-free year-round,reducing O&M costs by 40%.

Selection Guide/Purchasing Recommendations

When choosing the S202 C2 2CDS252001R0024,don’t buy blindly.Pay close attention to these points:

First,calculate the”load current and type”—confirm that the load’s rated current is≤2A and that it’s a resistive-inductive load(such as electronic equipment or lighting).If it’s an inductive load(such as a small motor),choose a MCB with a D-type trip(such as the S202 D2).If the load current exceeds 2A,choose a higher-current model(such as the S202 C4,4A).Don’t force a low-current MCB,as this can easily cause overload tripping.

Next,consider the”pole number requirements”—choose a 2P model for circuits that require disconnecting the neutral wire(such as medical equipment or outlets).Choose a 1P model for circuits that only require disconnecting the live wire(such as lighting).Don’t randomly select pole numbers,as this can be unsafe or waste space.Finally,I recommend buying genuine,original ABB products.Miniature circuit breakers are the core of terminal safety,and aftermarket components often have inaccurate tripping curves.A customer previously used aftermarket components,and their 2A miniature circuit breaker tripped at 1.5A,rendering the equipment inoperable.Shenzhen Changxin[www.cnplcdcs.com]carries the genuine ABB S202 C2 2CDS252001R0024 and can even help with load calculations,ensuring peace of mind.

FAQ

Q:Can the S202 C2 2CDS252001R0024 be connected to a 220V lighting circuit?

A:Yes!220V lighting circuits(such as LED lights)are resistive-inductive loads,making the Type C trip curve perfectly suitable.A 2A rated current can operate lighting with a total power of up to 440W(220V x 2A).For example,20 20W LED lights are perfectly adequate.This is how the lighting circuits in many office buildings are configured.

Q:After a micro-circuit breaker trips,how can I tell if it’s an overload or a short circuit?

A:It depends on the circuit breaker’s status after the trip.After an overload trip,the micro-circuit breaker handle will stop in the”middle position.”Wait 10 minutes for the bimetallic strip to cool,then flip it back to”OFF”and reclose the circuit breaker to restore the circuit.After a short circuit trip,the handle will jump directly to”OFF.”First,check the circuit for a short(such as a wire touching another).Repair the problem before reclosing the circuit breaker,otherwise it will trip again.