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Home » Products » Low Voltage Components » Low Voltage Circuit Breaker » Molded Case Circuit Breaker » YZM1 Series Molded Case Circuit Breaker
Molded Case Circuit Breaker

Molded Case Circuit Breaker

Our molded case circuit breaker is mainly used in distribution network of AC 50HZ/60HZ, rated voltage up to 690V, and rated working current up to 1250A. It can distribute electric power, and protect lines and equipment from the damage of overload, short circuit, under-voltage, and frequency variation.

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Technical Specifications of Moulded Case Circuit Breaker, YZM1

Model Number of poles Frame size rated current(A) Rated operation voltage (V) Rated insulation voltage (V) Rated limit short circuit breaking capacity (ka) 400v/690v Rated operation short circuit breaking capacity (ka) 400v/690v
YZM1-63L 3 ≤63 400 500 15* 7.5*
YZM1-63M 3,4 ≤63 400 500 35* 17.5*
YZM1-100L 3 ≤100 690 800 30/2 15/1
YZM1-100M 2,3,4 ≤100 690 800 50/5 25/2.5
YZM1-100H 3 ≤100 690 800 65/8 32/4
YZM1-225L 3 ≤225 690 800 30/2 15/1
YZM1-225M 2,3,4 ≤225 690 800 50/5 25/2.5
YZM1-225H 3 ≤225 690 800 65/8 32.5/4
YZM1-400L 3,4 ≤400 690 800 40/5 20/2.5
YZM1-400M 3 ≤400 690 800 55/8 27/4
YZM1-400H 3 ≤400 690 800 70/10 35/5
YZM1-630L 3,4 ≤630 690 800 40/5 20/2.5
YZM1-630M 3 ≤630 690 800 55/8 27/4
YZM1-630H 3 ≤630 690 800 70/10 35/5
YZM1-800M 3 ≤800 690 800 60* 30*
YZM1-800H 3 ≤800 690 800 70* 35*
YZM1-1250M 3 ≤1250 690 800 65* 32.5*

Note: "*" means that test parameter is at 400V.

Outline and Installation Size



All accessories, including shunt releases, under-voltage releases, auxiliary contacts and alarm contacts, are made into individual modules. Thus, they can be easily installed into the breakers. Additionally, all accessories are reliable in working performance.


S1, S2 operation button (prepared by user),
X wiring terminal,
K1, K2 self-locking relay,
S3 inching switch,
M special series motor,
Y brake electromagnetic.


  • Open/Close Wiring Diagram of Motor Operation

  • Operating Mechanism

  • Shut Tripping

  • Under-voltage Tripping

  • Auxiliary Contact and Alarm Contact

  • Double Auxiliary Contact

  • Alarm Contact

Currently, our KEMA, GOST, CCC, TUV, WTGS, and CB certified products are highly sough after by customers from Germany, the United Stated, Russia, Iran, South Africa, Argentina and other countries as a result of superior quality and low prices.

Besides, our company is located in Wenzhou City, zhengjiang Province, where we are near sea, land and air transportation facilities. This helps to offer you lower international shipping charges.

For further enquiries or for purchase of our mini circuit breakers, you are very much welcomed to contact us at Huayi Electric Co., Ltd.

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