ROHS 230V Type B Curve MCB Din Rail Mounting IECEN60947-2 Standard

Basic Information
Place of Origin: CHINA
Brand Name: NBSe/OEM
Certification: CE,CCC
Model Number: NBSB1-63
Minimum Order Quantity: 100pcs
Price: Negotiable
Packaging Details: 240pcs/ctn
Delivery Time: 10-20days
Payment Terms: Western Union, L/C, T/T
Supply Ability: 400,000pcs per month
Detail Information
Pole Number: 1P-4P Characristics: Type B Circuit Breaker Curve
Rated Voltage: 230V Rated Frequency: 50/60Hz
Certificate: CE,CB,CCC,TUV,ROHS Mount Type: Din-rail Mounting
Standard: IECEN60898-1, IECEN60947-2 Rated Current: 1A-63A
Rated Breaking Capacity: 3KA,4.5KA,6KA Circuit Breaker Application: Type B
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ROHS type b curve mcb


230V type b curve mcb


ROHS b curve breaker

Product Description

B Curve Circuit Breaker, Low Price & Top Quality, Certificate CE,CB ROHS, NBSB1-63


  • Air temperature: use temperature -30℃~+60℃, storage temperature -40℃~+70℃.
  • Altitude: The altitude of the installation site does not exceed 2000 meters, and the altitude of more than 2000 meters should be derated for use.
  • Atmospheric conditions: The relative humidity of the air at the installation site does not exceed 50% at +40°C, and the average humidity of the wettest month does not exceed 90% at +20°C.
  • Installation category: The installation category is Ⅲ and Ⅲ. Pollution degree: Level 2. Installation method: Use TH35-7.5 standard rail installation.
  • Installation conditions: The inclination between the installation surface and the vertical surface should not exceed 5°, and the installation site should be free of significant impact and vibration.
  • Wiring method: Use screw compression connection to ensure fast and safe connection of conductors.
Standard   IEC60898
Number of poles   1P,2P,3P,4P
Rated current(In)   6,10,16,20,25,32,40,50,63
Rated voltage(Un)   AC240/415V
Rated frequency   50/60Hz
Tripping curve   B,C,D
Release action characteristics Time delay 1.13In>1h Non-trip
1.45In<1h trip
2.55In 1s~60S trip
Instantaneous(Curve C) 5In >0.1s Non-trip
10In<0.1s trip
Magnetic releases operate   B curve:between 3 and 5In
C curve :between 5 and 10In
D curve: between 10 and 15In
Ratedbreaking capacit(Lcn)   6000A
Endurance   >2500
Circumstance temperature   -5~+40
Electrical life   >6000times
Mechanical life   20000 times
Tropical ration   Treatmen 2(RH95%,at 55°C)
Protection degree   IP20



Type b Circuit Breaker Applications:

A type B MCB trips when the current is 3 to 5 times the rated current with an operating time of 0.04 to 13 Seconds. It is used for purely resistive loads that are non-inductive loads or with a very small inductive load which has no considerable amount of inductance.

These types are mainly used for low power domestic applications like lighting circuits, home wirings, etc.

B Curve Circuit Breaker, Low Price & Top Quality, Certificate CE,CB ROHS, NBSB1-63


Our Micro Circuit Breaker  Main technical data


1. Rated current:1,2,3,4,6,10,16,20,25,32,40,50,63A;

2. Tripping characteristics:B(3-5)In,C(5-10)In,D(10-15)In;

3. No. of pole:1P,2P,3P,4P

4. Breaking capacity:4.5KA,6KA;


Packing Detail

1. Product Net weight: 100g/pole

2. Packing quantity& Weight: 12 pole /box, 20 box/carton, 240 pole/carton .

3. N.W: 23KG/carton

4. G.W:24KG/carton

5. Packing Measurement: inner box 22.5×9×8 cm, Carton 45×23.5×33.5 cm ( ie 0.036 cbm)

6. 20 foot container (26 cbm): 19,2000 pole ,800 cartons

7. 40 foot container (54 cbm): 38,4000 pole, 1600 cartons

B Curve Circuit Breaker, Low Price & Top Quality, Certificate CE,CB ROHS, NBSB1-63

The Over-Current Protection Property

ROHS 230V Type B Curve MCB Din Rail Mounting IECEN60947-2 Standard 0


MCB Selection

 The first characteristic is the overload which is intended to prevent the accidental overloading of the cable in a no fault situation. The speed of the MCB tripping will vary with the degree of the overload. This is usually achieved by the use of a thermal device in the MCB.

 The second characteristic is the magnetic fault protection, which is intended to operate when the fault reaches a predetermined level and to trip the MCB within one tenth of a second. The level of this magnetic trip gives the MCB its type characteristic as follows:

Type Tripping Current Operating Time
Type B 3 To 5 time full load current 0.04 To 13 Sec
Type C 5 To 10 times full load current 0.04 To 5 Sec
Type D 10 To 20 times full load current 0.04 To 3 Sec


· The third characteristic is the short circuit protection, which is intended to protect against heavy faults maybe in thousands of amps caused by short circuit faults.

· The capability of the MCB to operate under these conditions gives its short circuit rating in Kilo amps (KA). In general for consumer units a 6KA fault level is adequate whereas for industrial boards 10KA fault capabilities or above may be required.


Our Services

(1) Warranty ( 24 months warranty )

1. The warranty starts from the delivery date from our factory;

2. During the warranty, any defective product will get repaired or replaced for free ;

3. It is beyond the warranty as the products breaked by the violence , the carelessness or repaired , altered without authorization.


(2) Lead Time

1. Sample orders will be delivered from our factory within 7 working days.

2. General orders will be delivered from our factory within 7-15 working days.

3. Bulk orders will be delivered from our factory within 25 working days at most


(3) Shippment

1. By EMS, DHL, FedEx, TNT, UPS or other express.

2. By our forwarding agent (by air or by sea).

3. By your own forwarding agent.

4. By domestic forwarding agents to any city in China


Contact Details

Phone Number : +8613587466174

WhatsApp : +8613587466174