01
SIGMA · GEWISS 90 MCBminiature circuit breakers
For overload and short-circuit protection; rated current, number of poles, tripping curve and breaking capacity are evaluated together.
PRODUCT SELECTION · PROJECT · SUPPLY
Low-voltage
switchgear products.
Evaluate the Sigma and Gewiss product families together with their application area, protection function and technical documentation needs; obtain product selection and quotation support from ESCO Switch sales team.
Sigma main distribution and main dealerGewiss Ege Regional Distributor
Moulded-case circuit breaker (MCCB):miniature circuit breaker (MCB)
Industrial connectionSHORT ANSWER
switchgear product is not selected solely based on current value.
The correct product is determined by evaluating the load characteristics, rated current, number of poles, expected short-circuit level, protection function, panel conditions and coordination requirement together.
ESCO Switch; Sigma low-voltage products' main distributor and main dealer, as the regional distributor for Gewiss solutions, consolidates product codes, official technical documents, and quotation flow at one point.
PanelsContracting firmsIndustrial facilitiesCommercial buildingsResidential projects
PRODUCT FAMILIES
Protection, control
and distribution.
Clarify the function prior to quotation; verify the series and model selection with the latest manufacturer data.
SIGMA · GEWISS 90 MCB02
SIGMAMoulded-case circuit breakers
It is selected according to the requirements of protection, adjustment, accessories and coordination in distribution and industrial applications.
03
SIGMA · GEWISS 90 RCCBResidual current protection:
RCCB, RCBO and relay solutions have residual current type, sensitivity, number of poles and accompanying overcurrent protection controlled.
04
SIGMASurge Protective Devices
Protection level against transient overvoltages; the level is determined according to the installation location, panel level, and coordination requirements.
05
SIGMAControl and transfer
Contactor, relay, surge current switch and transfer switches are matched according to control voltage, load and operating scenario.
06
GEWISSDistribution panels and enclosures
Number of modules, mounting type, environment and IP protection requirement together determine panel and the enclosure family.
SELECTION CRITERIA
Clarify six pieces of information before the offer.
Exact selection is done with project calculation and manufacturer's technical data. The following headings help to reach the correct product family more quickly.
- 01
Application and Load
Residential, commercial, panel, motor, lighting or industrial load information.
- 02
rated current and pole
Line current, phase configuration, neutral disconnection requirement and connection type.
- 03
breaking capacity
Value suitable for the calculated short-circuit level at the point where the product will be used.
- 04
Protection function
Which of the functions of overload, short circuit, residual current and overvoltage are required.
- 05
Coordination and accessories
Upper-lower protection arrangement, remote tripping, auxiliary contact and control requirement.
- 06
panel and environment
Mounting area, number of modules, temperature, humidity, dust and required enclosure protection.
FAST COMPARISON
Which product covers what?
This table is for pre-selection; the product code must be verified from the technical data sheet.
| Product group | Main function | Required information in the quotation |
|---|---|---|
| MCB / miniature circuit breaker (MCB) | Overcurrent and short circuit protection | Current, pole, curve, breaking capacity |
| MCCB / moulded-case circuit breaker (MCCB) | Overcurrent protection and switching in distribution circuits | Current, pole, Icu/Ics, trip unit, accessory |
| RCCB / residual current circuit breaker (RCCB) | Residual current protection | Current, pole, type, sensitivity, accompanying overload protection |
| RCBO | Combining residual current and overload protection in a single device | Current, pole, curve, breaking capacity, type and sensitivity |
| SPD / surge protective device (SPD) | Protection against transient overvoltages | Protection level, system structure, panel position, pole |
| panel / Panel | Hosting protection and distribution equipment | Module, installation, measurement, IP class and environment |
COMMON MISTAKES
Check the technical specifications before the product code.
Select breaking capacity only by price
The short-circuit level should be evaluated according to the point where the product is to be used.
RCCB to be considered as overcurrent protection
The presence of residual current function together with overload/short circuit function should be verified in which devices.
Skip load type and tripping curve
The load's initial start-up or operating characteristics affect unnecessary tripping and protection behavior.
Do not match the document scope with the product code
Certification for a specific product series under a corporate ISO certificate is not within the same scope.
TECHNICAL TERMS
In the offer and specifications
commonly used expressions.
Short definitions facilitate communication; they do not replace project calculation or standard.
- In · rated current
- The current value specified for the device to carry under defined operating conditions.
- Icu / Ics
- Values that express short-circuit breaking and service capacity in compact circuit breakers.
- B / C / D tripping curve
- The tripping curves that define the magnetic tripping behavior of the miniature circuit breaker according to the load characteristics.
- IΔn
- Residual current circuit breaker (RCCB) device's specified residual current operating threshold.
- RCCB / RCBO
- RCCB has residual current functionality; RCBO has residual current circuit breaker (RCCB) with overload protection.
- IP class
- The degree of protection defines the enclosure's protection against solid objects and ingress of water.
FREQUENTLY ASKED QUESTIONS
Answers that speed up the preparation of the offer.
Go to the quality certificates centerWhat information should I send for the switchgear product offer?
If there is a brand and product code, provide the code list; otherwise, share the load information, rated current, number of poles, breaking capacity, application area, and required date.
What is the difference between miniature circuit breaker (MCB) and moulded-case circuit breaker (MCCB)?
Both products are used for overload and short-circuit protection; proper selection is made according to the current range, breaking capacity, adjustment requirements, accessories and application conditions.
Does the residual current circuit breaker also protect against overcurrent?
Device type dependent. RCBO products combine residual current and overload protection; overload protection is required only in products with residual current functionality.
Where can I find product certifications?
Model-based current certificate and conformity documents Quality Certificates on the page you can check the official Sigma and Gewiss connections.
OFFICIAL SOURCES
For technical information, visit the manufacturer's pages.
Verify your final product selection via the linked official source, as the series, values and documents may be updated.
PRODUCT AND PROJECT QUOTE
Send your list directly to the sales team.
Share product codes, project lists, or existing panel information. We will evaluate your request based on current product and document resources.
Useful information for the quotation
- Brand and product code
- Quantity and required date
- Technical values or specification
- Delivery city and project name
Power supply control: 2 October 2026 · Definitive product selection and technical suitability must be verified through project data and the manufacturer's latest technical documentation.