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What is the maximum current rating?

The MCB is available in ratings from 1A up to 63A.

MCB 4p 63A 6ka Electrical Miniature Circuit Breaker D Curve

Name: MCB 4p 63A 6ka Electrical Miniature Circuit Breaker D Curve
Brand: Wenzhou Santuo Electrical Co., Ltd.
SKU: 1979050725

Zhejiang, ChinaWenzhou Santuo Electrical Co., Ltd.

US$0.635

20,000-49,999 Pieces

US$0.625

50,000+ Pieces

Sample price:US$100.00/bag.Request sample

Product profile

Customization

Available

Breaking Capacity

Low Voltage Circuit Breakers

Operation

Electric Type

Model NO.

STM3-63

Speed

Normal Type Circuit Breaker

Arc-extinguishing Medium

Air

Installation

Fixed

Structure

MCB

Poles Number

Type

Circuit Breaker

Function

Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection), RCCB

Certification

Standard

IEC 60898.1

Ue

230/400V

in

1, 2, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63A

Pole

1p2p3p4p

Transport Package

Exporting Carton

Specification

240pcs/ctns

Trademark

SONTUOEC, STUOEC, WZSTEC, SONTUNE

Origin

Wenzhou Zhejiang

HS Code

8536200000

Production Capacity

10000pieces/Day

Key features

High Breaking Capacity: Achieves 6kA breaking capacity for reliable short-circuit protection.

Multi-Curve Options: Available in B, C, and D tripping curves for diverse load types.

Long Electrical Life: Standard 6,000 cycles, extendable to 10,000 cycles.

Robust Mechanical Life: 20,000 cycles standard; up to 100,000 without power.

Wide Current Range: Offers ratings from 1A to 63A for various applications.

Certified Safety: Complies with CE, GB10963, and IEC 60898.1 standards.

Compact Design: Lightweight, DIN rail mountable with novel structure.

20+ Years Experience: Over two decades of professional circuit breaker manufacturing.

Company profile

Wenzhou Santuo Electrical Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2016-01-08Nearest Port: NINGBOAverage Response Time: ≤1.85hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization, OEM/ODM service capability, in-stock capacity, and substantial stated production volumes for contactors and circuit breakers. It exports 90% of total sales, has self-operated import/export rights, serves multiple global regions, and has attended the Canton Fair. ISO9001:2015 and CE certification are reported. However, innovation evidence is limited because no new products were reported in the past year and no SDK is available. Quality and service procedures exist but lack written records, while overseas agents, branches, warehouses, and showrooms are absent. Peak-season fulfillment information is inconsistent: one slice states 2–3 months, while others state within 15 workdays or one month. Financial data is represented only by years, so credibility cannot be determined.

Supplier typeThe supplier is an export-oriented manufacturer with self-operated import/export rights, OEM and ODM capabilities, in-stock capacity, and stated production of 500,000 contactors and 1,500,000 circuit breakers. It serves multiple overseas regions but has no overseas agents, branches, warehouse, or showroom.

CertificationsThe supplier reports an ISO9001:2015 management-system certificate and CE product compliance certification. These are explicit certification holdings, although no additional certification details or validity documentation are provided.

R&D capabilityThe supplier offers ODM services and multiple design customization modes, but reports no new products during the past year and no available SDK. This indicates design-service capability without sufficient evidence of recent product innovation.

Production capacityThe supplier reports annual output of 500,000 contactors and 1,500,000 circuit breakers, maintains inventory capability, and states off-peak lead times within 15 workdays in some records. However, peak-season timing is inconsistent, with records ranging from within 15 workdays or one month to 2–3 months.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization, and also provides OEM and ODM services, including OEM for well-known brands. This is strong direct evidence of broad customization capability.